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SITE MANAGEMENT
AND MONITORING PLAN
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Pensacola Offshore ODMDS SMMP
The following Site Management and Monitoring Plan (SMMP) for the
Pensacola Offshore Ocean Dredged Material Disposal Site (ODMDS) has been
developed and agreed to pursuant to the Water Resources Development Act (WRDA)
Amendments of 1992 to the Marine Protection, Research, and Sanctuaries Act
(MPRSA) of 1972 for the management and monitoring of ocean disposal activities, as
resources allow, by the U.S. Environmental Protection Agency (EPA) and the U.S.
Army Corps of Engineers (USACE).
This plan is effective from the date of signature for a period not to exceed 10
years. The plan shall be reviewed and revised more frequently if site use and
conditions at the site indicate a need for revision.
Colonel, Corps of Engineers
District Commander
P.O. Box 2288
Mobile, Alabama
Regional Administrator
U.S. Environmental Protection Agency
Region 4
Atlanta, Georgia
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Pensacola Offshore ODMDS SMMP
PENSACOLA OFFSHORE ODMDS
SMMP
TABLE OF CONTENTS
Section Page
1.0 INTRODUCTION 1
1,1 Site Management and Monitoring Plan Team 1
2.0 SITE MANAGEMENT- 2
2.1 Disposal Site Characteristics 3
2.2 Management Objectives 7
2.3 Disposal History and Dredged Material Volumes 8
2.4 Material Suitability 12
2.5 Timing of Disposal 13
2.6 Disposal Techniques 13
2.7 Disposal Location.. 13
2.8 Permit and Contract Conditions 13
2.9 Permit Process 14
2.10 Information Management of Dredged Material Disposal Activities 14
3.0 SITE MONITORING 15
3.1 Baseline Monitoring 17
3.2 Disposal Monitoring 17
3.3 Post-Disposal Monitoring 18
3.4 Material Tracking and Disposal Effects Monitoring 18
3.4.1 Summary of Results of Past Monitoring Surveys 18
3.4.2 Future Monitoring Surveys 19
3.5 Reporting and Data Formatting 21
4.0 ANTICIPATED SITE USE ,22
5.0 MODIFICATION OF THE PENSACOLA OFFSHORE ODMDS SMMP 22
6.0 IMPLEMENTATION OF THE PENSACOLA OFSHORE ODMDS SMMP 22
7.0 REFERENCES 22
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Pensacola ODMDS SMMP
LIST OF FIGURES
Figure No. Title
Figure 1 Pensacola Harbor Project Map and Pensacola Naval Air Station Channel
Figure 2 Location of the Pensacola Offshore ODMDS
Figure 3 Berm alignments within Pensacola Offshore ODMDS based on 2001
and 2003 surveys.
Figure 4 Hydrographic survey of Pensacola Offshore ODMDS, 2014
Figure 5 Hydrographic survey of Pensacola Offshore ODMDS, 2014 Including
Berm Alignment
LIST OF TABLES
Table No.
Title
Table 1 Pensacola Offshore ODMDS Corner Coordinates
Table 2 Dredged Material Disposal at the Offshore ODMDS
Table 3 Storm Activity in the Vicinity of the Pensacola Offshore ODMDS
Table 4 Summary of Permit and Contract Conditions
Table 5 Surveys and Studies Conducted at or in the vicinity of the Pensacola
Offshore ODMDS
Table 6 Pensacola Offshore ODMDS Monitoring Strategies and Thresholds for
Action
LIST OF APPENDICES
Appendix
Title
Appendix A Water Column Evaluation Numerical Model (STFATE) Input
Parameters
Appendix B Generic Special Conditions for MPRSA Section 103 Permits,
Pensacola Offshore ODMDS
Appendix C Generic Contract Language for Use of the Pensacola Offshore
ODMDS
IV
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Pensacola ODMDS SMMP
PENSACOLA OFFSHORE ODMDS
SMMP
1.0 INTRODUCTION.
It is the responsibility of the EPA and USACE under the MPRSA of 1972 to
manage and monitor ODMDSs designated by EPA pursuant to Section 102 of the
MPRSA. The goal of this management is to ensure ocean dredged material disposal
activities will not unreasonably degrade the marine environment or endanger human
health or economic potential. As part of this responsibility, a SMMP was originally
developed as part of the ODMDS designation process and was published in September
1988 as part of the Final Environmental Impact Statement (FEIS) for Designation of a
New Ocean Dredged Material Disposal Site, Pensacola, Florida to specifically address
disposal of dredged material into the Pensacola Offshore ODMDS. This plan will include
past monitoring results and will comply with provisions in WRDA of 1992 and a 2007
Memorandum of Understanding (MOU) between EPA, Region 4 and USACE, South
Atlantic Division (SAD). Upon finalization of this SMMP, these provisions shall be
requirements for all dredged material disposal activities at the Pensacola Offshore
ODMDS. All Section 103 (MPRSA) ocean disposal permits and concurrences shall
be conditioned as necessary to assure consistency with the SMMP.
This SMMP has been prepared in accordance with the Guidance Document for
Development of Site Management Plans for Ocean Dredged Material Disposal Sites
(EPA & USACE, 1996). This document provides a framework for the development of
SMMPs required by MPRSA and WRDA of 1992. The SMMP may be modified if it is
determined that such changes are warranted as a result of information obtained during
the monitoring process. The SMMP will be reviewed and revised as needed or every 10
years, whichever time period is shorter.
1.1 Site Management and Monitoring Plan Team. An interagency SMMP team has
been established to assist EPA and the USACE in managing this SMMP. The team
consists of the following agencies and their respective representatives:
USACE, Mobile District Port of Pensacola
Ms. Jennifer Jacobson Ms. Amy Miller
Mr. Matthew Lang
Mr. Larry Parson
USACE, Jacksonville District Regulatory EPA Region 4
Mr. Clif Payne Mr. Gary Collins
Florida Department of Environmental Protection
Ms. Elizabeth Orr
National Oceanic and Atmospheric Administration U.S. Coast Guard
Fisheries District Commander
Mr. Roy Crabtree Eighth District
Mr. David Bernhart
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Pensacola ODMDS SMMP
Other agencies, such as the National Marine Fisheries Service (NMFS) and the
U.S. Fish and Wildlife Service (USFWS), will be asked to participate where appropriate.
The SMMP team will assist EPA and the USACE in evaluating existing monitoring data,
type of disposal (i.e., operations and maintenance (O&M) vs. new work), quality of
material (i.e., sand vs. mud vs. silt/clay), location of disposal within the Pensacola
Offshore ODMDS, and quantity of material. The team will assist EPA and the USACE
on deciding appropriate monitoring techniques, level of monitoring, significance of
results, and potential management options.
Specific responsibilities of EPA and the USACE, Mobile District are:
EPA: EPA is responsible for designating and/or de-designating MPRSA Section
102 ODMDSs, for evaluating environmental effects from disposal of dredged
material at these sites and for reviewing and concurring on dredged material
suitability determinations.
USACE: The USACE is responsible for evaluating dredged
material suitability, issuing MPRSA Section 103 permits, regulating
site use, selecting MPRSA Section 103(b) ocean disposal sites if
no suitable EPA designated site is available, and developing and
implementing disposal monitoring programs. All of the above
activities, with the exception of issuing MPRSA Section 103
permits, are handled by the Mobile District. Permitting activities for
this part of Florida are handled by the Jacksonville District.
2.0 SITE MANAGEMENT.
ODMDS management involves a broad range of activities including regulating
schedule of use, quantity, and physical/chemical characteristics of dredged material
placed at the site. It also involves establishing disposal controls, conditions and
requirements to avoid and minimize potential impacts to the marine environment.
Finally, ODMDS management involves monitoring site environs to verify unanticipated or
significant adverse effects are not occurring from past or continued use of the site and
that permit/concurrence conditions are met.
Section 228.3 of the Ocean Dumping Regulations (40 CFR §220 - 229) states
"management of a site consists of regulating times, rates, and methods of disposal and
quantities and types of materials disposed of; developing and maintaining effective
ambient monitoring programs for the site; conducting disposal site evaluation studies;
and recommending modifications in site use and/or designation". The plan may be
modified if it is determined that such changes are warranted as a result of information
obtained through the monitoring process. MPRSA, as amended by WRDA of 1992,
provides SMMPs shall include but not be limited to:
A baseline assessment of conditions at the site;
A program for site monitoring;
Special management conditions or practices to be
implemented at each site necessary for the
protection of the environment;
Consideration of the quantity and physical/chemical
characteristics of dredged materials placed at the site;
Consideration of anticipated site use over the long-term; and
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Pensacola ODMDS SMMP
A schedule for review and revision of the plan.
2.1 Disposal Site Characteristics. The Pensacola Offshore ODMDS was designated
by EPA, Region 4 in September 1988 for fine-grained material dredged from the
Pensacola area (Figure 1) that meets Ocean Dumping Regulations (40 CFR §220-229),
but is not suitable for beach nourishment. Boundary coordinates of the Pensacola
Offshore ODMDS are shown in Table 1, North American Datum (NAD) 27:
Table 1: Pensacola Offshore ODMDS Corner Coordinates
Latitude 30°08'50" N
Longitude 87°19'30"W
Latitude 30°08'50" N
Longitude 87°16'30"W
Latitude 30°07'05" N
Longitude 87°16'30" W
Latitude 30°07'05" N
Longitude 87°19'30"W
State Plane 0903 (Florida North)
Northing 428347.51
Easting 1075701.81
Northing 427959.37
Easting 1091501.16
Northing 417355.53
Easting 1091243.06
Northing 417743.77
Easting 1075439.07
The Pensacola Offshore ODMDS is located in the Gulf of Mexico approximately 11
miles south of Pensacola Pass (Figure 2). The site covers an approximately 6-square
mile rectangular area, with a bottom surface that generally declines in an
easterly/southeasterly direction at elevations ranging from -63 to -93 feet mean lower
low water (MLLW).
Future disposal of sediments will be within a bermed area created during the site's
initial use in 1988-89 as illustrated in Figure 3. This area is in the shape of a horseshoe,
with berms on the south, east, and north sides of the disposal site. The bottom elevation
within the bermed area varies from -68 to -83 feet MLLW. The distance between crests
of the north and south berms is approximately 6,050 feet. The east-west extent of the
area from the crest of the east berm to high ground varies from 6,000 to 11,000 feet.
The following is the original design information for the bermed area:
• Crest elevation -70 feet MLLW;
East berm alignment along longitude 87° 17' 00" W from latitude 30° 07' 28"
N to 30° 08'13" N; and
• South and North berm alignments 30° 07' 28" N to 30° 08' 13" N,
respectively.
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Pensacola ODMDS SMMP
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REVISED TO 30 SEPTEMBER 1998
OFFICE OF THE DISTRICT ENGINEER
MOBILE, ALABAMA
Figure 1: Pensacola Harbor Project Map.
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Pensacola ODMDS SMMP
Figure 2: Location of the Pensacola Offshore ODMDS
Hydrographic surveys were conducted of the northern and southern berms in
February 2001 and of the eastern berm in August 2003. The crest of the berms varied in
elevation from -77 to -72 feet MLLW and deviated from the intended alignment by up to
200 feet. Likewise, the berm heights varied up to 8 feet and base widths varied up to
800 feet (Figure 3). Side slopes near the toes and crests were generally rounded, with
side slopes at approximately 1-foot vertical to 40 feet horizontal or flatter. Surveys
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Pensacola ODMDS SMMP
conducted in May 2014 (Figures 4 & 5) show the berm is distinguishable and intact.
Although there is some variation from the original berm design, the existing configuration
will continue to provide sufficient capacity over more than the 25-year project life.
Management goals expected to be gained with this plan were restriction of
movement of fine-grained materials in the northerly or easterly direction. Subsequent
surveys confirm sediments were confined, as expected, and did not show any evidence
contrary to expected results. Additionally, the area has experienced numerous storm
events over the past 30 years. Storm events occurring in the vicinity of the Pensacola
Offshore ODMDS since 2004 are listed in Table 2.
Table 2: Storm Activity in the Vicinity of the Pensacola Offshore ODMDS
Storm
Year
Ivan1
2004
Arlene2
2005
Cindy2
2005
Dennis1
2005
Katrina1
2005
Tammy2
2005
Alberto2
2006
Fay2
2008
Claudette2
2009
Ida1
2009
Bonnie2
2010
Isaac1
2012
Andrea2
2013
1 2
Hurricane, Tropical Storm
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based on 2001 and 2003 surveys.
Upon completion of the berm construction, the Pensacola Offshore ODMDS was
used for disposal of dredged material from the Navy Homeport of Pensacola between
1989 and 1990. The Pensacola Offshore ODMDS is also available for disposal from the
Pensacola Harbor Federal navigation channel and private dredging activities (permitted
regulatory actions). The USACE and the U.S. Navy were cooperating agencies of the
September 1988 FEIS for site designation. Baseline physical and biological conditions
at the Pensacola Offshore ODMDS were described in the 1988 FEIS. Physical,
chemical, and biological conditions of dredged material to be placed at the,Pensacola
Offshore ODMDS are more recently described in the Final Evaluation of Dredged
Material-Pensacola Harbor Navigation Channel Project-Pensacola, Escambia County,
Florida (May 2013).
Future use of the Pensacola Offshore ODMDS is projected to occur from
dredging the federally authorized Pensacola Harbor channels, and private users such as
the Port of Pensacola or Pensacola Naval Air Station (NAS). Other than projected
quantities in Section 2.3, additional uses may occur by private entities and therefore the
exact nature and quantity of material, time of disposal, and type of equipment to be used
are unknown for those permitted regulatory actions.
2.2 Management Objectives. Appropriate management of an ODMDS is aimed at
assuring disposal activities will not unreasonably degrade or endanger human health,
welfare, the marine environment or economic potentialities (MPRSA §103(a)). There are
three primary objectives in managing the Pensacola Offshore ODMDS:
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Pensacola ODMDS SMMP
• Protection of the marine environment, living resources, and
human health and welfare;
• Documentation of disposal activities at the Pensacola
Offshore ODMDS and provision of information which is
useful in managing dredged material disposal activities; and
• Provide for beneficial use of dredged material whenever practical.
The objective of the SMMP is to provide guidelines in making management
decisions necessary to fulfill mandated responsibilities to protect the marine environment
as discussed previously. Risk-free decision-making is an impossible goal; however, an
appropriate SMMP can narrow the uncertainty. The following sections provide the
framework for meeting these objectives.
2.3 Disposal History and Dredged Material Volumes. It is intended that the Pensacola
Offshore ODMDS will be used for dredged material (both maintenance and new work
material) from the greater Pensacola Bay, Escambia County, Florida vicinity. The
primary users of the Pensacola Offshore ODMDS are:
• USACE Mobile District
• Private Applicants (i.e. Regulatory Actions)
Disposal history can be found at the Ocean Disposal Database maintained by the
Engineer Research and Development Center (ERDC)
(http://el.erdc.usace.army.mil/odd/). The Navy conducted dredging activities in 1989
through 1990 from the Gulf of Mexico thru Pensacola Pass to the turning basin located
adjacent to Pensacola NAS. This dredging was conducted as part of the Navy Gulf
Coast Strategic Homeporting. Four different disposal areas were used during this
dredging including approximately 3.77 million cys (from the Navy turning basin) in the
Pensacola Offshore ODMDS. In addition to the dredging conducted for the Navy,
emergency dredging of the eastern leg of the Pensacola inner harbor channel was
conducted in August 2004. Approximately 30,000 cys of material was dredged and
placed in the Pensacola Offshore ODMDS. Prior to this dredging event, the inner harbor
and bay portions of the Pensacola Harbor navigation channel had not been maintained
since 1973. In 2005, another 337,328 cys of maintenance material from the rest of the
Pensacola Harbor navigation channel was placed in the site. The most recent disposals
of maintenance material from the navigation channel occurred in 2013 and 2014
(313,872 cys and 261,194 cys, respectively). Disposal events associated with the
Pensacola Offshore ODMDS are summarized in Table 3. Future volumes and rates of
disposal, from both Federal and private applicants, are expected to range on the order of
approximately 350,000 cys per dredging and disposal event on a 2 to 3 year cycle.
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Pensacola ODMDS SMMP
Table 3: Dredged material disposal at the Pensacola Offshore ODMDS
Year
Volume (cys)
Material Type
Project
1989-90
3,778,300
NW: Sandy Mud/Silt
Navy Homeport
2004
30,000
Mud/Silt
Pensacola Harbor
Emergency
2005
337,328
Sandy Mud/Silt
Pensacola O&M
2013
313,872
Sandy Mud/Silt
Pensacola O&M
2014
261,194
Sandy Mud/Silt
Pensacola O&M
Notes: cubic yards = CY; new work = NW, * Pre-site designation
The Pensacola Offshore ODMDS consists of medium to coarse sand substrate.
Currents within the site range from 0.722 feet/sec at a depth of-30 feet MLLW and 0.525
feet/sec at a depth of -56 feet MLLW (Appendix A). These currents are not sufficient to
move the medium sands in the Pensacola Offshore ODMDS, however during hurricanes
or extreme storm events the likelihood increases. Dredged material placed, or projected
for disposal, is less dense and could be dispersed more readily. Hydrographic surveys
of the Pensacola Offshore ODMDS conducted in 2014 (Figures 4 & 5) show the area
has remained relatively stable and intact since its last use in 2013. Given the site's
demonstrated stability through these events, including major storms such as Hurricanes
Opal (1995), Ivan (2004), Dennis and Katrina (2005), and lesser hurricanes Ida (2009)
and Isaac (2012), it is unlikely that significant sediment movement would have resulted
from these events. In the event that a pre-disposal survey indicates a deterioration of
the submerged berm, appropriate materials from the next disposal action will be used to
restore the berm to acceptable dimensions.
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Pensacola ODMDS SMMP
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Pensacola ODMDS SMMP
2.4 Material Suitability. USACE Beneficial Use of Dredged Material Engineer Manual
(EM) 1110-2-5026 requires dredged material be maximized within the coastal system.
Dredged materials that qualify for beach or near-shore disposal per applicable State of
Florida standards shall be beneficially placed in such locations, to the maximum extent
practicable, and the State of Florida will exercise its authority and responsibility during
any future permitting activities. Beneficial use of compatible dredged material for beach
nourishment is strongly encouraged and supported by EPA. All sandy material from the
lower portion of the Federal Pensacola navigation project, including the entrance
channel, is typically placed on Escambia County, Florida beaches for nourishment
instead of ocean disposal. In fact, the USACE manages its dredged material under its
Regional Sediment Management (RSM) initiative to be used beneficially and remain
within the natural sediment budget. As a result, the USACE evaluates the whole coastal
system when managing dredged material placement rather than focusing on an
individual project. Disposition of beach quality sand should be planned to allow material
to be placed so that it will be within or accessible to the sand-sharing system, to the
maximum extent practicable, and following provisions of the Clean Water Act (CWA).
Two potential sources of material are expected to be placed at the site, new work
and maintenance dredged material. These materials will consist of mixtures of silts,
clays, and sands in varying percentages. Sediments dredged for navigational purposes
in the Pensacola Harbor and NAS Pensacola Channels include an ocean source (sandy,
littoral materials), river source (fine-grained sands, silts, and clays derived from easily
eroded soils from the upper Escambia River basin), and mixtures of both. Shoals occur
where specific physical factors promote deposition or movement of sediments.
The suitability of dredged material for ocean disposal must be verified by the
USACE and concurred with by EPA prior to disposal. Verification will be valid for three
years from the most current verification. Verification will involve:
1) a case-specific evaluation against exclusionary criteria (40 CFR 227.13(b)),
2) a determination of the necessity for testing including bioassay (toxicity and
bioaccumulation) testing for non-excluded material based on the potential for
contamination of the sediment since last tested, and
3) carrying out the testing (where needed) and determining that the non-
excluded, tested material is suitable for ocean disposal.
Verification documentation for suitability will be completed prior to use of the
ODMDS. Documentation will be in the form of a MPRSA Section 103 Evaluation.
Potential testing and Evaluation will follow procedures outlined in the 1991 EPA/USACE
Dredged Material Testing Manual (Green Book) and 2008 Southeast Regional
Implementation Manual (SERIM) or appropriate updated versions. This includes how
dredging projects will be subdivided into project segments for sampling and analysis.
The MPRSA Section 103 Evaluation will be in the form outlined in Appendix C of the
SERIM. Water Quality Compliance determinations will be made using the short-term fate
of dredged material (STFATE-ADDAMS) model. Only material determined to be suitable
and in compliance with the Ocean Dumping Criteria (40 CFR §227) through the
verification process by the USACE and EPA, Region 4 can be disposed in the ODMDS.
In addition, the site has been restricted to predominantly fine-grained material that is not
suitable for beach nourishment or that does not have a median grain size of >0.125 mm
and a composition of < 10 % fines.
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Pensacola ODMDS SMMP
2.5 Timing of Disposal. At present, no restrictions have been determined to be
necessary for disposal related to seasonal variations in ocean current or biotic activity.
As monitoring results are compiled, should any such restrictions appear necessary,
disposal activities will be scheduled so as to avoid adverse impacts. Monitoring and
precautions necessary to protect sea turtles and Gulf sturgeon, as described in Section
2.6, are required when using hopper dredges. Additionally, if new information indicates
that endangered or threatened species are being adversely impacted, restrictions may
be implemented.
2.6 Disposal Techniques. No specific disposal technique is required for this site. In
order to protect sea turtles and Gulf sturgeon, the NMFS requires monitoring according
to guidance outlined in the Regional Biological Opinion for Dredging of Gulf of Mexico
Navigation Channels and Sand Mining ("Borrow) Areas Using Hopper Dredges by
USACE Galveston, New Orleans, Mobile, and Jacksonville Districts (NMFS, 2003,
amended 2005 & 2007) with all standard surveillance and evasive measures to protect
sea turtles employed during all placement operations at the Pensacola Offshore
ODMDS. "Standard manatee conditions: issued by the USFWS would be followed to
minimize adverse impacts to marine mammals within the project area.
2.7 Disposal Location. Disposal shall occur no less than 330 feet (100 meters) inside
the site boundaries to comply with 40 CFR §227.28. Disposal methods to prevent
mounding of dredged material from becoming an unacceptable navigation hazard will be
used. Dredged material shall be placed so that at no point will depths be less than -55
feet MLLW. To maximize Pensacola Offshore ODMDS capacity and minimize mounding
of material, disposal events shall be scattered throughout specified disposal zones
through consultation with USACE and EPA, Region 4 staff. Depths will be monitored to
detect if adjustments to disposal methods are needed to prevent unacceptable
mounding. While control of disposal to minimize mounding is preferred, the physical
removal or leveling of material above -55 feet MLLW is a management alternative should
mounds greater than those elevations occur.
2.8 Permit and Contract Conditions. Pre and post-disposal monitoring requirements
described under Section 3.0 Site Monitoring will be included as conditions on all MPRSA
Section 103 permits and will be incorporated in the contract language for all Federal
projects. A summary of the management and monitoring requirements to be included
are listed in Table 4.
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Pensacola ODMDS SMMP
Table 4: Summary of Permit and Contract Conditions
Condition
Reference
Dredged Material Suitability and Term of
Verification
Pensacola Offshore ODMDS SMMP
page 12
Disposal within Appropriate Zones
Pensacola Offshore ODMDS SMMP
page 13
Post Bathymetric Surveys within 30 days of
Project Completion
Pensacola Offshore ODMDS SMMP
page 18
Disposal Monitoring and Recording of Disposal
Locations
Pensacola Offshore ODMDS SMMP
page 17&18
Reporting Requirements: Daily & Monthly
Operations Reports and Disposal Summary
Reports within 90 Days of Project Completion
Pensacola Offshore ODMDS SMMP
page 21&22
2.9 Permit Process. All ocean disposal of dredged material, with exception of Federal
Civil Works projects, requires an ocean dumping permit issued by the USACE pursuant
to Section 103 of the MPRSA. A summary of the permitting process can be found in 33
CFR Parts 320-325.
2.10 Information Management of Dredged Material Disposal Activities. As
discussed in the following sections, a substantial amount of diverse data regarding use
of the Pensacola Offshore ODMDS and effects of disposal is required from many
sources (EPA, USACE, Navy, and Port of Pensacola). If this information is readily
available and in a useable format, it can be used to answer many questions typically
asked about a disposal site:
o What is being dredged?
o How much is being dredged?
o Where did the dredged material come from?
o Where was the dredged material placed?
o Was material dredged correctly? Placed correctly?
o What will happen to the environment at the disposal site?
As part of site management, EPA and the USACE will investigate alternatives for
appropriate data management. The USACE has an Ocean Disposal Database
maintained by ERDC. This database provides quantities placed at the Pensacola
Offshore ODMDS along with chemical, physical, and biological information, and whether
the project is civil works or a privately permitted action.
The Mobile District Spatial Data Branch (CESAM-OP-J) has created an online
Sediment Sampling Mapping Module that has capacity to organize and access all data
relating to core borings and sediment testing activity. This application will allow users to
retrieve detailed sediment sample properties (e.g. X, Y locations, harbor bottom
elevations, top of rock elevation, or material characteristics) correlating with all relevant
sediment testing (chemical, biological, or physical) results, and link related documents
such as core borings, gradation curves or sediment testing reports.
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Pensacola ODMDS SMMP
In an attempt to streamline data sharing, EPA Region 4 and USACE, SAD has
agreed on an extensible Markup Language (XML) standard for sharing of disposal
monitoring data (see also Section 3.5).
3.0 SITE MONITORING.
The MPRSA establishes the need for including a monitoring program as part of
the SMMP. Site monitoring is conducted to ensure the environmental integrity of a
disposal site and the surrounding areas are unharmed and to verify compliance with site
designation criteria, any special management conditions, and with permit/concurrence
requirements. Monitoring programs should be flexible, cost effective, and based on
scientifically sound procedures and methods to meet site-specific monitoring needs. A
monitoring program should have the ability to detect environmental change as a result of
disposal activities and assist in determining compliance. The intent of the program is to
provide the following:
(1) Information indicating whether the disposal activities
are occurring in compliance with permit and site
restrictions; and/or
(2) Information concerning short-term and long-term
environmental impacts of disposal; and/or
(3) Information indicating short-term and long-term fate of
materials placed in the marine environment.
The main purpose of a disposal site monitoring program is to determine whether
dredged material site management practices, including disposal operations need to be
changed to avoid significant adverse impacts.
Table 5 lists surveys and studies conducted at, or in the vicinity of,
the Pensacola Offshore ODMDS dating back to 1986.
Table 5: Surveys and Studies Conducted at or in the vicinity of the Pensacola Offshore ODMDS
Survey/Study Title
Conducted By:
Date
Purpose
Results
Summary of Currents
off Pensacola, FL
Physical
Oceanography
Division, Naval
Ocean Research &
Development Activity
July 1998
Document currents in the
potential dredged material
disposal site as part of Navy
homeport project
Currents were non-tidal,
wind driven, westward and
parallel to the coast
Water Quality and
Sediment Data
EPA
Nov 1986,
Apr 1987,
and July
1987
Determine water quality and
sediment characteristics at the
Pensacola Offshore ODMDS
Predominantly medium and
coarse sands at the
ODMDS. Sediments
analyzed for metals,
nutrients, oil and grease,
pesticides and PCBs were
either below MDLs or in very
low concentrations. Salinity,
temp, DO, and %light
transmission were normal
for water quality parameters
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Pensacola ODMDS SMMP
Pensacola Offshore
ODMDS Benthic
Communities Study
Nov 86 &
Apr 87
Benthic community
characterization
Infaunal communities
characteristic of medium and
coarse grain sediments of
the northern Gulf of Mexico;
dominated by polychaetes.
Characteristics of
Dredged Material
Proposed for Disposal
Dredged Materials
Research Team, EPA
Aug 1988
Determine effects of dredged
material on representative
marine organisms
Proposed dredge material
were not acutely toxic nor
were chemicals in them
bio-available for
accumulation to
concentrations of
concern.
Video, Still
Photography and Side
Scan Sonar
1989
No live/hard bottoms
detected
Bathymetric Survey
USACE
1989
Monitor bathymetry changes
Depths at the ODMDS range
from -60 to -95 feet with an
average of -76 feet MLLW.
Disposal Monitoring
Navy
1989-90
Compliance
Insured dredged material
was placed within the
ODMDS in specified area.
Post Disposal
Bathymetric Survey
USACE
1990
Monitor bathymetry changes
Dredged material was
placed within designated
area and berm was verified.
Post Disposal
Sediment Mapping
EPA
Apr & Oct
90; Oct 93
Map sediment distribution
patterns
Dredged material was
distinguishable from bottom
sediment; migration was as
predicted
Post Disposal Benthic
Communities
assessment
EPA
Oct 90 &
93
Evaluate benthic community
parameters within and outside
of dredged material influences
No adverse impacts to
benthic communities as a
result of dredged material
disposal
Bathymetric Survey
EPA
2/2001
Monitor bathymetry changes
Berm still distinguishable.
Disposed material within
ODMDS.
Evaluation of Dredged
Material from
Pensacola Harbor,
Escambia County,
Florida
USACE
5/2002
Evaluate suitability of
proposed dredged material for
ocean disposal
Proposed dredged material
is primarily silts and clays.
Bulk sediment analysis;
elutriate testing, water
column bioassays, whole
sediment bioassays, and
bioaccumulation studies
resulted in acceptable levels
for ocean disposal.
Bathymetric Survey
USACE
9/2003
Monitor bathymetry changes
Berm still distinguishable.
Disposed material within
ODMDS. Collect bathymetric
data to evaluate site for
determining future disposal
areas within ODMDS.
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Pensacola ODMDS SMMP
Bathymetric Survey
USACE
8/2004
Post-disposal surveys.
Emergency dredging of
Pensacola Harbor.
Material from emergency
dredging of Pensacola
Harbor placed within
ODMDS. Site features
remain distinguishable.
Bathymetric Survey
USACE
11/2004
Post-disposal surveys. O&M
dredging of Pensacola Harbor.
Material from emergency
dredging of Pensacola
Harbor placed within
ODMDS. Site features
remain distinguishable.
Evaluation of Dredged
Material from Lower
Pensacola Harbor
Post Deepwater
Horizon Oil Spill
USACE
3/2012
Evaluate suitability of
proposed dredged material for
ocean disposal post oil spill.
Results of PAH and TPH
testing of surface sediments
showed no discernible
evidence that sediment
quality had been impacted
by the Deepwater Horizon
Oil spill.
Evaluation of Dredged
Material from
Pensacola Harbor,
Escambia County,
Florida
USACE
5/2013
Evaluate suitability of
proposed dredged material for
ocean disposal.
Proposed dredged material
is primarily silts and clays.
Bulk sediment analysis;
elutriate testing, water
column bioassays, whole
sediment bioassays, and
bioaccumulation studies
resulted in acceptable levels
for ocean disposal.
Status and Trends
Assessment (40 CFR
§228.13)
EPA
9/2013
To determine the physical,
chemical, geological, and
biological structure of the
ODMDS
Benthic community is viable
and healthy and in recovery
with no adverse effects of
disposal of dredged
material.
Bathymetric Survey
USACE
11/2014
Post-disposal surveys. O&M
dredging of Pensacola Harbor.
Material from O&M dredging
of Pensacola Harbor placed
within ODMDS. Site features
remain distinguishable.
3.1 Baseline Monitoring. Disposal has occurred at the site since the late 1980's for
Pensacola Navy channel dredging operations, emergency dredging of the Pensacola
inner harbor in 2004, and O&M dredging of the Pensacola Federal navigation channel in
2013 and 2014. Prior to 1990, and as part of the Final Environmental Impact Statement
for Designation of a New Ocean Dredged Material Disposal Site, Pensacola, Florida
dated 1988, numerous surveys and studies have been conducted at the Pensacola
Offshore ODMDS in relation to disposal activities. Detailed results of these studies
provide a baseline and are presented in the aforementioned designation FEIS. Those
studies and subsequent surveys listed in Table 5 serve as the main body of data for
monitoring impacts associated with the use of the Pensacola Offshore ODMDS. Both
pre and post-disposal surveys will be conducted associated with future dredging and
disposal activities.
3.2 Disposal Monitoring. For all disposal activities, an electronic tracking system (ETS)
must be utilized. The ETS will provide surveillance of the transportation and disposal of
dredged material. The ETS will be maintained and operated to continuously track the
horizontal location and draft condition (accuracy! 0.1 foot) of the disposal vessel (i.e.
hopper or scow) from the point of dredging to the disposal site and return to the point of
dredging. Data shall be collected at least every 0.25 nautical mile or every 4 minutes
17
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Pensacola ODMDS SMMP
during travel to and from the Pensacola Offshore ODMDS and twelve seconds or every
30 feet of travel, while the hull status is open within the Pensacola Offshore ODMDS. In
addition to the continuous tracking data, the following trip information shall be
electronically recorded for each dredging and disposal cycle:
a. Load Number
b. Disposal Vessel Name and Type (e.g. hopper, scow)
c. Estimated volume of Load
d. Description of Material Placed
e. Source of Dredged Material
f. Date, Time and Location at Initiation and Completion of Disposal Event
It is expected that disposal monitoring will be conducted utilizing the Dredging
Quality Management (DQM) system for Civil Works projects [see
http://dam.usace.army.mil/Specifications/lndex.aspx1, although other systems are
acceptable. Disposal monitoring and ETS data will be reported to EPA Region 4 on a
weekly basis (within 1 week of disposal) utilizing the extensible Markup Language (XML)
specification and protocol per Section 3.5. EPA Region 4 and USACE, Mobile District
shall be notified within 24 hours if disposal occurs outside of the Pensacola Offshore
ODMDS or specified disposal zone, or if excessive leakage occurs.
3.3 Post-Disposal Monitoring. The USACE or other site user will conduct a bathymetric
survey within 30 days after disposal project completion. [Surveys will not be required for
projects less than 50,000 cubic yards]. Surveys will conform to the minimum
performance standards for Corps of Engineers Hydrographic Surveys as described in the
USACE Engineering Manual, EM1110-2-1003, Hydrographic Surveying, dated
November 30, 2013
[http://mvw.publications.usace.army.mil/Portals/76/Publications/EnqineerManuals/EM 11
10-2-1003.pdf] or updates. Surveys will be taken along lines spaced at 500-foot intervals
or less. The minimum performance standards from Table 3-1 in Hydrographic Surveying
shall be followed. Horizontal location of the survey lines and depth sounding points will
be determined by an automated positioning system utilizing a differential global
positioning system. The vertical datum will be referenced to prescribed NOAA Mean
Lower Low Water (MLLW) datum. The horizontal datum should be referenced to the
local State Plane Coordinate System (SPCS) for the Pensacola area (Florida North -
0903) or in Geographical Coordinates (latitude-longitude). The horizontal reference
datum should be the North American Datum of 1983 (NAD 83).
The number and length of transects required will be sufficient to encompass the
Pensacola Offshore ODMDS and a 500-foot wide area around the disposal zone. The
survey area may be reduced on a case-by-case basis if disposal zones are specified and
adhered to.
3.4 Material Tracking and Disposal Effects Monitoring. Surveys can be used to
address possible changes in bathymetric, sedimentological, chemical, and biological
aspects of the Pensacola Offshore ODMDS and surrounding area as a result of the
disposal of dredged material at the site.
3.4.1 Summary of Results of Past Monitoring Surveys. Table 5 lists past
surveys at the Pensacola Offshore ODMDS. In general, the surface of the site is
covered by sand waves dominated by coarse and medium sand with varying amounts of
shell fragments. Bottom current data within the Pensacola Offshore ODMDS indicates
that fine-grained dredged material has the potential to be dispersed beyond the
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Pensacola ODMDS SMMP
designated site boundaries. The original purpose for the creation and design of the berm
structure was to restrict the dredged material migration to only a generally southwest
direction. The seafloor has a natural depression along that orientation that leads to
deeper waters. USACE bathymetric surveys indicate the submerged berm structure was
stable and acted to manage dispersion of finer grained dredged material.
The most recent monitoring of the Pensacola Offshore ODMDS was completed in
September 2013 (USEPA, 2014). Results of this survey indicate that the benthic
community is viable and the only discernable differences seen were at two sample
locations that had been recently disposed on (less than 8 weeks prior to survey). The
physical nature of the dredged material in those locations is believed to account for the
slow recovery seen at that time.
3.4.2 Future Monitoring Surveys. Based on the type and volume of material
placed and impacts of concern, various monitoring surveys can be used to examine if,
and the direction, placed dredge material is moving, and what environmental effect the
material is having on the site and adjacent areas.
Within 30 days of completion of a disposal event, detailed bathymetric surveys of
the disposal area will be completed. The interagency team will meet, if necessary, to
review the results of these efforts and determine the need for additional information.
This need will be based on observance of any anomalies (i.e. potential cultural
resources) or potential adverse impacts associated with a specific event. If the results of
the bathymetric surveys do not indicate any anomalies or adverse impacts, no additional
monitoring will be required for the disposal event. Reassessment of the site will be
undertaken in accordance with 40 CFR §228.13 approximately every 10 years. Status
and trend assessments include characterization of water quality, benthic communities,
and sediment size/chemistry allowing for identification and interpretation of changes in
community structure. Additional surveys for water quality, sediment mapping, or the use
of remote sensing equipment may also be required.
At the current time, no nearby biological resources have been identified that are of
concern for potential impact. The Pensacola Offshore ODMDS is at least two nautical
miles from known fish havens, artificial reefs, and fishing areas. The site has been
designated as dispersive. This means that it is expected material will be moved outside
the site boundaries. It is also expected material will not move in distinct mounds, but
instead will blend with the surrounding environment causing a progressive transition to
sediments containing a higher percentage of silt and clay. Changes in sediment
composition will likely alter the benthic community structure. However, based on
previous benthic studies, it is unlikely that permanent or long-term adverse impacts will
result due to changes in sediment composition.
Future surveys as outlined in Table 6 will focus on determining the rate and
direction of placed dredge material dispersal and the capacity of the Pensacola Offshore
ODMDS. The management plan presented may require revision based on the outcome
of any monitoring program.
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Pensacola ODMDS SMMP
Table 6: Pensacola Offshore ODMDS Monitoring Strategies
and Thresholds for Action
Sponsor
Management Options
Goal
Technique
Rationale
Frequency
Threshold for Action
Threshold Not
Exceeded
Threshold
Exceeded
Monitor
Bathymetric
Trends
Bathymetry
Site User
Determine the
extent of the
disposal mound
and major
bathymetric
changes
Post Disposal
for projects
greater than
50,000 cy
Disposal mound
occurs outside
ODMDS boundaries
Continue
Monitoring
-Modify disposal
method/disposal
-Restrict disposal
volumes
Benthic
Effects
Monitoring &
Trend
Assessment
(40 CFR
228.13)
Water and
Sediment
Quality,
Benthic
Community
Analysis
EPA
Periodically
evaluate the
impact of disposal
on the marine
environment
(40CFR 228.9)
Approximately
every 10 years
-Absence from the
site of pollution
sensitive biota
-Progressive non-
seasonal changes in
water or sediment
quality
Continue
Monitoring on
prescribed
schedule
-Conduct
Environmental
Effects Monitoring
or Advanced
Environmental
Effects Monitoring
-Review dredged
material evaluation
Environmental
Effects
Chemical
Monitoring
EPA/
USACE
Determine if
chemical
Implement if
disposal
Contaminants are
found to be elevated1
Discontinue
monitoring.
- Institute
Advanced
Environmental
Monitoring
Benthic
Monitoring
contaminants are
significantly
elevated1 within
and outside of site
boundaries
Determine
whether there are
adverse changes
in the benthic
populations
outside of the site
and evaluate
recovery rates
footprint
extends
beyond the
site
boundaries or
if Trend
Assessment
results
warrant.
Adverse changes
observed outside of
the site that may
endanger the marine
environment
Effects Monitoring
- Implement case
specific
management
options (ie.
Remediation, limits
on quantities or
types of material).
-Consider isolating
dredged material
(capping)
Advanced
Environmental
Effects
Monitoring
Tissue
Chemical
Analysis
Benthic
Monitoring
EPA/
USACE
Determine if the
site is a source of
adverse
bioaccumulation
which may
endanger the
marine
environment
Determine if the
site is a source of
adverse sub-
lethal2 changes in
benthic organisms
which may
endanger the
marine
environment
Implement if
Environmental
Effects
Monitoring
warrants
Benthic body burdens
and risk assessment
models indicate
potential for food
chain impacts.
Sub-lethal effects are
unacceptable.
Discontinue
monitoring
-Discontinue site
use
- Implement case
specific
management
options (i.e.
Remediation, limits
on quantities or
types of material).
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Pensacola ODMDS SMMP
Site Capacity
MPFATE /
Long T erm
Fate
USACE/
Site
Users
Determine
dispersiveness of
site and long and
short term
capacity
As resources
allow
New work volumes
exceed estimated
capacity
Continue to use
site without
restrictions
- Enlarge site or
designate
additional site for
new work
Long-term
Fate
Modeling
EPA/US
ACE
Determine
dispersiveness of
site and aerial
extent of impact
As resources
allow
Aerial extent of impact
reaches resources of
concern and/or
increases over time
Continue to use
site without
restrictions
-Restrict disposal
volumes
-Create berms to
decrease dredged
material transport
-Cease site use /
designate new site
Current
Meter &
Wave
Gauge
EPA/US
ACE/Site
User
Precision
Bathymetry
EPA/US
ACE
Insure Safe
Navigation
Depth
Bathymetry
Site User
Determine height
of mound and any
excessive
mounding
Post Disposal
for projects
greater than
50,000 cy
Mound height > -55
feet MLLW
Continue
Monitoring
-Modify disposal
method
-Restrict disposal
volumes
Mound height > -50
feet MLLW
Continue
Monitoring
- Halt disposal
- Physically level
material
Compliance
Disposal
Site Use
Records
Site User
-Ensure
management
requirements are
being met
-To assist in site
monitoring
Daily during
the project
Disposal records
required by SMMP
are not submitted or
are incomplete
Continue
Monitoring
-Restrict site use
until requirements
are met
Review of records
indicates a dump
occurred outside
ODMDS boundary
Continue
Monitoring
-Notify EPA,
Region 4/USACE,
and investigate why
egregious dump(s)
occurred. Take
appropriate
enforcement action.
Review of records
indicates a dump
occurred in the
ODMDS but not in
target area
Continue
Monitoring
-Direct disposal to
occur as specified.
1 Significantly elevated: Concentrations above the range of contaminant levels in dredged
sediments that the Regional Administrator and the District Engineer found to be suitable for
disposal at the ODMDS.
2 Examples of sub-lethal effects include without limitation the development of lesions, tumors,
development abnormality, and/or decreased fecundity.
3.5 Reporting and Data Formatting. Disposal monitoring data shall be provided
electronically by the USACE Project Manager to EPA Region 4. Disposal monitoring
data shall be provided to EPA Region 4 electronically on a weekly basis (within one
week of disposal event). Data shall be provided per the EPA Region 4 XML format and
delivered as an attachment to an email to DisposalData.R4@epa.gov. The XML format
is available from EPA Region 4.
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Pensacola ODMDS SMMP
Disposal summary reports shall be provided to EPA within 90 days after project
completion. These reports should include: vessel name, disposal start and end dates
and times; dredging project; volume disposed, number of loads completed, type of
material disposed; contractor conducting the work, permit and/or contract number;
identification of any misplaced material; and dates of bathymetric surveys of the
Pensacola Offshore ODMDS. The disposal summary reports should be accompanied by
the bathymetry survey results (contour plot and X, Y, Z ASCII data file). These reports
can be accessed by USACE personnel at the DQM Website
http://dqm-portal.usace.army.mil.
The user will be required to prepare and submit to the USACE daily reports of
operations and a monthly report of operations for each month or partial month's work.
The user is also required to notify the USACE and the EPA within 24 hours (or next
business day) if a violation of the permit and/or contract conditions occur during disposal
operations. In the case of large new work projects where the material is expected to
consist of stiff clays, it is recommended that mid-project bathymetric surveys be
conducted of the disposal area to insure that mounding limits are not being exceeded.
4.0 ANTICIPATED SITE USE.
It is anticipated that there will be a need for use of the Pensacola Offshore ODMDS
for many years. The anticipated site is projected for dredged material disposal of
approximately 350,000 cys of dredged material on a 2 to 3 year basis. This projection is
based on shoaling rates, past dredging records, currently available dredged material
disposal options, and USACE planning documents.
5.0 MODIFICATION OF THE PENSACOLA OFFSHORE ODMDS SMMP.
If the results of the monitoring surveys or validation reports from other sources
indicate that continued use of the Pensacola Offshore ODMDS would lead to
unacceptable effects, then ODMDS management will be modified to mitigate those
effects. The SMMP will be reviewed and updated at least every 10 years or if necessary
if site use changes significantly. For example, the SMMP will be reviewed if the quantity
or type of dredged material placed on site changes significantly or if conditions at the site
indicate a need for revision. The plan should be updated in conjunction with activities
authorizing use of the site.
6.0 IMPLEMENTATION OF THE PENSACOLA OFFSHORE ODMDS SMMP.
This plan shall be effective from date of signature for a period not to exceed 10
years. The plan shall be reviewed and revised more frequently if site use and conditions
at the site indicates a need for revision. The EPA and USACE shall share responsibility
for implementation of the SMMP. Site users may be required to undertake monitoring
activities as a condition of their permit. The USACE will be responsible for
implementation of the SMMP for Federal new work and maintenance projects.
7.0 REFERENCES.
Fredette, Thomas J., Nelson, David A., Clausner, James E., and Anders, Fred J. 1990.
Guidelines for Physical and Biological Monitoring of Aquatic Dredged Material Disposal
Sites, Technical Report D-90-12, US Army Engineer Waterways Experiment Station,
Vicksburg, MS.
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Pensacola ODMDS SMMP
Pequegnat, Willis E., Gallaway, Benny J., and Wright, Thomas D., 1990. Revised
Procedural Guide for Designation Surveys of Ocean Dredged Material Disposal Sites,
Technical Report D-90-8, US Army Engineer Waterways Experiment Station, Vicksburg,
MS-
U.S. Army Corps of Engineers (USACE). 1994. Hydrographic Surveying. Engineering
Manual 1110-2-1003, Department of the Army, Washington D.C.
U.S. Environmental Protection Agency and U.S. Army Corps of Engineers, 1991.
Evaluation of Dredged Material Proposed for Ocean Disposal (Testing Manual), February
1991. Prepared by Environmental Protection Agency Office of Marine and Estuarine
Protection and Department of Army United States Army Corps of Engineers under EPA
Contract No. 68-C8-0105.
U.S. Environmental Protection Agency and U.S. Army Corps of Engineers, 1996.
Guidance Document for Development of Site Management Plans for Ocean Dredged
Material Disposal Sites, February 1996. Prepared by Environmental Protection Agency
Office of Water and Department of Army United States Army Corps of Engineers.
U.S. Environmental Protection Agency Region 4 and U.S. Army Corps of Engineers
South Atlantic Division, 2008. Southeast Regional Implementation Manual (SERIM)
Requirements and Procedures for Evaluation of the Ocean Disposal of Dredged Material
in Southeastern U.S. Atlantic and Gulf Coastal Waters, August 2008.
U.S. Environmental Protection Agency (USEPA). 1988. Final Environmental Impact
Statement for Designation of a New Ocean Dredged Material Disposal Site, Pensacola,
Florida.
U.S. Environmental Protection Agency (USEPA). 2014. Pensacola Offshore ODMDS
Status and Trends, September 2013. June 2014. Prepared by Environmental
Protection Agency, Region 4, Water Protection Division, Coastal & Ocean Protection
Section
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Pensacola ODMDS SMMP
APPENDIX A
WATER COLUMN EVALUATIONS NUMERICAL
MODEL (STFATE) INPUT PARAMETERS
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Pensacola ODMDS SMMP
Water Column Evaluations Numerical Model
(STFATE) Input Parameters Pensacola
Offshore ODMDS
Site Description
Parameter
Value
Units
Number of Grid Points (left to right)
45
Number of Grid Points (top to bottom)
45
Spacing Between Grid Points (left to right)
750
ft
Spacing Between Grid Points (top to bottom)
500
Constant Water Depth
75
ft
Roughness Height at Bottom of Disposal Site
.0051
ft
Slope of Bottom in X-Direction
0
Deg.
Slope of Bottom in Z-Direction
0
Deg.
Number of Points in Ambient Density Profile Point
3
Ambient Density at Depth = 1 ft
1.0248
g/cc
Ambient Density at Depth = 36 ft
1.0267
g/cc
Ambient Density at Depth = 75 ft
1.0271
g/cc
Ambient Velocity Data
Parameter
Value
Units
Profile
2-Point at constant depth
X-Direction Velocity at Depth = 30 ft
0.0
ft/sec
Z-Direction Velocity at Depth = 30 ft
-0.722
ft/sec
X-Direction Velocity at Depth = 56 ft
0.0
ft/sec
Z-Direction Velocity at Depth = 56 ft
-0.525
ft/sec
DISPOSAL Operation Data
Parameter
Value
Units
Location of Disposal Point from Top of Grid
11,250*
ft
Location of Disposal Point from Left Edge of Grid
16,875*
ft
Dumping Over Depression
0
Input, Execution and Output
Parameter
Value
Units
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Pensacola ODMDS SMMP
Location of the Upper Left Corner of the Disposal Site
- Distance from Tod Edae
6,000 ft
Location of the Upper Left Corner of the Disposal Site
- Distance from Left Edge
6,375 ft
Location of the Lower Right Corner of the Disposal Site
- Distance from Top Edge
16,500 ft
Location of the Lower Right Corner of the Disposal Site
- Distance from Left Edge
27,375 ft
Duration of Simulation
14,400 sec
Long Term Time Step
600 sec
Coefficients
Parameter
Keyword
Value
Settling Coefficient
BETA
o.ooo1
Apparent Mass Coefficient
CM
1.0001
Drag Coefficient
CD
0.5001
Form Drag for Collapsing Cloud
CDRAG
1.0001
Skin Friction for Collapsing Cloud
CFRIC
0.0101
Drag for an Ellipsoidal Wedge
CD3
0.1 oo1
Drag for a Plate
CD4
1.0001
Friction Between Cloud and Bottom
FRICTN
0.0101
4/3 Law Horizontal Diffusion Dissipation Factor
ALAMDA
0.0011
Unstratified Water Vertical Diffusion Coefficient
AKYO
Pritchard
Expression
Cloud/Ambient Density Gradient Ratio
GAMA
0.2501
Turbulent Thermal Entrainment
ALPHAO
0.2351
Entrainment in Collapse
ALPHAC
o
o
o
Stripping Factor
CSTRIP
0.0031
1 Model default value
Represents center of disposal site. Dredged material requiring disposal in another
location in order to meet the dilution criteria must be brought to the attention of EPA and
the USACE.
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Pensacola Offshore ODMDS Background Water Concentrations
Chemicals of concern
Background Concentrations (ug/L)
Arsenic
1.14
Cadmium
0.0041
Chromium
0.21
Copper
0.229
Lead
0.041
Mercury
I
r-H
o
Nickel
0.64
Selenium
0.51
Silver
0.011
Zinc
0.59
Tributyltin (TBT)
0.0251
Aldrin
0.0011
Chlordane
0.0011
DDT
0.00251
Dieldrin
0.0011
alpha-Endosulfan
0.0011
beta-Endosulfam
0.0021
Endrin
0.0021
gamma-BHC (Lindane)
0.00051
Heptachlor
0.000751
Heptachlor epoxide
0.0011
Toxaphene
i
t
r-H
o
Pentachlorophenol
5.331
Values derived from Pensacola Offshore ODMDS Trend Assessment Study (2013)
^•Analyte not detected. Value based on one half the reporting limit.
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Pensacola ODMDS SMMP
cc
U
r-\
<
X=6,000ft
Z=6,375ft
IbmxlaCDVDS
Disposal Locator (x=l 1,25Qfl: z=l6,875)
X=16,500
Z=27,375
CimmtVdocity:
-0.72&s@3Qft
^.52&@56ft
Z- Direction: Grid Spacing =75Qft, 45 gids
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Pensacola ODMDS SMMP
APPENDIX B
GENERIC SPECIAL CONDITIONS FOR
MPRSA SECTION 103 PERMITS
PENSACOLA OFFSHORE ODMDS
I. DISPOSAL OPERATIONS
A. For this permit, the term disposal operations shall mean: navigation of any vessel
used in disposal operations, transportation of dredged material from the dredging site to
the Pensacola Offshore ODMDS, proper disposal of dredged material at the disposal
area within the Pensacola Offshore ODMDS, and transportation of the hopper dredge or
disposal barge or scow back to the dredging site.
B. The boundary coordinates of the Pensacola Offshore ODMDS is defined as the
rectangle delineated by the following latitude/longitude and State Plane Coordinate
system (zone 0903 Florida North) NAD 83 coordinates:
Latitude 30°08'50" N Longitude 87°19'30" W
Latitude 30°08'50" N Longitude 87°16'30" W
Latitude 30°07'05" N Longitude 87°16'30" W
Latitude 30°07'05" N Longitude 87°19'30" W
State Plane 0903 (Florida North)
Northing 428347.51 Easting 1075701.81
Northing 427959.37 Easting 1091501.16
Northing 417355.53 Easting 1091243.06
Northing 417743.77 Easting 1075439.07
C. No more than [NUMBER] cubic yards of dredged material excavated at the location
defined in [REFERENCE LOCATION IN PERMIT] are authorized for disposal at the
Pensacola Offshore ODMDS. The permittee agrees and understands that all dredged
material will be placed in such a manner that its highest point will not exceed -55 feet
MLLW.
D. The permittee shall use an electronic positioning system to navigate to and from the
Pensacola Offshore ODMDS. For this section of the permit, the electronic positioning
system will be as per the DQM specifications. If the electronic positioning system fails
or navigation problems are detected, all disposal operations shall cease until the failure
or navigation problems are corrected.
E. The permittee shall certify the accuracy of the electronic positioning system proposed
for use during disposal operations at the Pensacola Offshore ODMDS. The certification
shall be accomplished by providing current certification documentation from the National
DQM Program for scow and hopper dredge instrumentation systems. The National
DQM certification is valid for one year from the date of certification.
F. The permittee shall not allow any water or dredged material placed in a hopper
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Pensacola ODMDS SMMP
dredge or disposal barge or scow to flow over the sides or leak from such vessels during
transportation to the Pensacola Offshore ODMDS. In addition, the permittee
understands that no debris is to be placed in the Pensacola Offshore ODMDS.
G. A disposal operations inspector and/or captain of any tug boat, hopper dredge or
other vessel used to transport dredged material to the Pensacola Offshore ODMDS shall
insure compliance with disposal operation conditions defined in this permit.
1. If the disposal operations inspector or the captain detects a violation, he shall
report the violation to the permittee immediately.
2. The permittee shall contact the U.S. Army Corps of Engineers (USACE),
Mobile District's Regulatory Branch at (251) 690-2658 and EPA Region 4 at
(404) 562-9395 to report the violation within twenty-four (24) hours after the
violation occurs. A complete written explanation of any permit violation shall be
included in the post-dredging report.
H. When dredged material is placed at the ODMDS, no portion of the hopper dredge,
disposal barge, or scow shall be outside the boundaries of the Pensacola Offshore
ODMDS as defined in Special Condition B. Additionally, disposal shall occur within a
specified disposal zone defined as [DEFINE COORDINATES AND SIZE OF
DISPOSAL ZONE],
I. The permittee shall use an automated disposal verification system that is certified
by the National DQM program to continuously track the horizontal location and draft
condition of the disposal vessel (hopper dredge or disposal barge or scow) to and
from the Pensacola Offshore ODMDS. This real-time information is available on-line
to the Mobile District and will be provided to the EPA Region 4 via an FTP site on a
weekly basis.
J. The permittee shall conduct a bathymetric survey of the Pensacola Offshore ODMDS
within two months prior to project disposal and within 30 days following project
completion.
1. The number and length of the survey transects shall be sufficient to
encompass the Pensacola Offshore ODMDS and a 1500-foot wide area around
the site. Transects shall be spaced at 500-foot intervals or less.
2. Vertical accuracy of the survey shall be ±0.5 feet. Horizontal location of the
survey lines and depth sounding points will be determined by an automated
positioning system utilizing either microwave line of site system or differential
global positioning system. The vertical datum shall be mean lower low water
(mllw) and the horizontal datum shall use Florida State Plane or latitude and
longitude coordinates (North American Datum 1983). State Plane coordinates
shall be reported to the nearest 0.10- foot and latitude and longitude coordinates
shall be reported as degrees and decimal minutes to the nearest 0.01 minutes.
K. The permittee has read and agrees to assure that they are in compliance with the
requirements of the Pensacola Offshore ODMDS Site Management and Monitoring Plan
(SMMP).
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II. REPORTING REQUIREMENTS
A. The permittee shall send USACE, Mobile District's Coastal Environment Team and
EPA Region 4's Oceans, Wetlands and Streams Protection Branch (61 Forsyth Street,
Atlanta, GA 30303) a notification of commencement of work at least thirty (30) days
before initiation of any dredging operations authorized by this permit and referenced by
the permit number. In addition, the permittee agrees to contact the U.S.
Coast Guard (Marine Safety Office) at 251-441-5674 prior to disposing of any material in
the ocean disposal site.
B. The permittee shall submit to USACE weekly disposal monitoring reports. These
reports shall contain the information described in Special Condition 1.1.
C. The permittee shall develop and send one (1) copy of the disposal summary report to
the Mobile District's Regulatory Branch and one (1) copy of the disposal summary report
to EPA Region 4 documenting compliance with all general and special conditions
defined in this permit. The disposal summary report shall be sent within 90 days after
completion of the disposal operations authorized by this permit. The disposal summary
report shall include the following information:
1. The report shall indicate whether all general and special permit conditions
were met. Any violations of the permit shall be explained in detail.
2. The disposal summary report shall include the following information: USACE
permit number, actual start date and completion date of dredging and disposal
operations, total cubic yards disposed at the Pensacola Offshore ODMDS,
locations of disposal events, and pre and post disposal bathymetric survey
results (in hard and electronic formats).
III. PERMIT LIABILITY
A. The permittee shall be responsible for ensuring compliance with all conditions of this
permit.
B. The permittee and all contractors or other third parties who perform an activity
authorized by this permit on behalf of the permittee shall be separately liable for a civil
penalty of up to $50,000 for each violation of any term of this permit they commit alone
or in concert with the permittee or other parties. This liability shall be individual, rather
than joint and several, and shall not be reduced in any fashion to reflect the liability
assigned to and civil penalty assessed against the permittee or any other third party as
defined in
33 U.S.C. Section 1415(a).
C. If the permittee or any contractor or other third party knowingly violates any term of this
permit (either alone or in concert), the permittee, contractor or other party shall be
individually liable for the criminal penalties set forth in 33 U.S.C. Section 1415(b).
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APPENDIX C
GENERIC CONTRACT LANGUAGE FOR USE OF
THE PENSACOLA OFFSHORE ODMDS
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SECTION 35 20 23.23
i
NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM
HOPPER DREDGE
6/21/2010
PART 1 GENERAL
1.1 DESCRIPTION
The work under this contract requires use of the National Dredging Quality
Management Program (DQM), formerly known as Silent Inspector (SI), to
monitor the dredge s status at all times during the contract, and to hack load
number, time-position history, instrument readings, vessel state, compute tons dry
solids, report data, and manage data history.
This performance-based specification section identifies the minimum required
output and precision and instrumentation requirements. The requirements may be
satisfied using equipment and technical procedures selected by the Contractor.
For purposes of this document. Contracting Officers Representative (COR) shall
include the DQM Support Team personnel when on site.
1.2 SUBMITTALS
Government approval is required for submittals with a "G" designation;
submittals not having a "G" designation are for information only. When used, a
designation following the "G" designation identifies the office responsible for
review of the submittal for the Government. The following shall be submitted in
accordance with Section 01 33 00, "SUBMITTAL PROCEDURES":
SD-01, Preconstruction Submittals
Dredge Plant Instrumentation Plan Revisions or Addendum: G. SAM-OP-J
Contract Quality Control Plan, section 3.2.5; G, XXX-XX-X (enter local district)
SD-06. Test Reports
Data Appropriately Archived e-mail, section 3.2.11; G, XXX-XX-X (enter local
district)
SD-07. Certificates
Letter of National Dredging Quality Management Program Certification: G,
XXX-XX-X '(enter local district)
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Pensacola ODMDS SMMP
1.3 PAYMENT
No separate payment shall be made for installation operation and maintenance of
the DQM certified system as specified herein for the duration of the dredging
operations; all costs in connection therewith shall be considered a subsidiary
obligation of the Contractor and covered under the contract unit prices for
dredging in the bidding schedule.
1.4 NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM
CERTIFICATION
The Contractor is required to have a current certification from the National
Dredging Quality Management Program for the hopper dredge instrumentation
system to be used under this contract Criteria for certification shall be based on
the most recent specification posted on the National Dredging Quality
Management Program website (https://si.usace.armv.mil/specifications.aspx).
Compliance with these criteria shall be verified by on-site plant inspections
conducted by DQM Support Center Inspection Team personnel and by periodic
review of the transmitted data A National Dredging Quality Management
Program Certification is valid for one year from the date of the annual inspection.
Certification is contingent upon the system's ability to continuously meet the
performance requirements as outlined in sections 3.3 and 3.5. If issues with data ¦
quality are not corrected within 48 hours the system certification shall be revoked
and recertifieation may be necessary
An Annual Inspection Shall Include
• A series of quality assurance checks as described in section 3.4
Compliance Inspection and Quality Assurance Checks'
• Verification of data acquisition and transfer (Section 3.3)
• Review of the Dredge Plant Instrumentation Plan (DPIP) as described in
Section 1.5
The dredging contractor shall have personnel who are familiar with the system
instrumentation and who have the ability to recalibrate the sensors on site during
the inspection The dredging contractor must provide transportation from the
shore to any platform with a DQM certified system for the Contracting Officers
Representative in a timely manner As a general rule inspection teams will come
with PPE consisting of hardhats. steel toe boots, and life jackets. If additional
safety equipment is needed, such as eye protection safety harnesses, work gloves
or personal location beacons, these items shall be provided to the team while on
site.
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Pensacola ODMDS SMMP
The owner or operator of the dredge shall contact the DQM Support Center
Inspection Team at dqmsi@usace.arniy.mil on an annual basis, or at least three
weeks prior to the proposed beginning of dredging, to schedule an inspection.
This notification is meant to make the inspection team aware of a target date. At
least one week prior to start of dredging, the dredging contractor shall contact the
inspection team and verbally coordinate a specific inspection date and location.
The contractor shall then follow-up this conversation with a written e-mail
confirmation The owner operator shall coordinate the inspection with all local
authorities, including but not limited to, the local USAGE contractmg officer.
Re-inspection is required for any yard work which produces modification to
displacement (i.e. change m dredge lines, repositioning or repainting hull marks),
modification to bin volume (change in bin dimensions or addition or subtraction
of structure) or changes in sensor type or location; these changes shall be reported
in the sensor log section of the DPIP. A system does not have to be transmitting
data between jobs, however it may not be turned off. disconnected or removed
from the dredge in order to retain its certification during this period.
1.5 DREDGE PLANT INSTRUMENTATION PLAN (DPIP)
The Contractor shall have a digital copy of the DPIP on file with the National
DQM Support Center. The Contractor shall also maintain a copy of the DPIP on
the dredge which is easily accessible to government personnel at all times. This
document shall describe how sensor data will be collected, how quality control on
the data will be performed, and how sensors data reporting equipment will be
calibrated and repaired if they fail. A description of computed dredge specific
data and how the sensor data will be transmitted to the DQM Database will also
be included. The Contractor shall submit to the DQM Support Center any
addendum or modifications made to the plan, subsequent to its original
submission, prior to start of work.
The DPIP shall include the following as a minimum:
(DPIP must have table of contents in the following order)
1. Dredgmg Company
a Dredge Point of Contact
b Telephone Number
c. Email address
2. Dredge Monitoring System Provider
a. Dredge Monitoring System Point of Contact
b Telephone Number
c Email address
3. Dredge Name
4. Sensor data collection method
a Any averaging
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Pensacola ODMDS SMMP
b. Route from sensor to DQM computer
5. DQM Computer Hardware & Components
a. Brand names and specifications
b User guides and owner manuals
6. Sensor repair, replacement, installation, modification or calibration methods
7. Dimensioned Drawings of the Dredge
a. A typical plan and profile view of the dredge showing:
l Hopper dredge cross section
li. Locations of required sensors referenced to:
(1) Fore and alt perpendicular
(2) Hopper dredge length, depth, width, zero reference
(3) External hull draft markings (latitudinal longitudinal, keel)
(4) Each other
m Overall dredge dimensions
lv. Dimensions of draghead
(1) Length
(2) Pipe inside diameter at sensor locations
(3) Offset to positioning system antenna
8. Criteria and method used to increment load number
9. Description of how the UTC date time stamp is collected
10. Positionmg system
a. Brand name and specifications
b. Dredge heading instrumentation brand name and specifications
c. Instrument used to calculate Coarse Over Ground (COG)
d Any calculation done external to the instrumentation
e. Certificates of calibration and. or manufacturer certificates of compliance
f. Description of how dredge speed is determined
11. Tide
a. Description of how tidal information is entered into the data string.
12. Hull status
a. Instrumentation brand name and specifications
b. Certificates of calibration and or manufacturer certificates of compliance
c. Any calculation done external to the instrumentation
13. Drafts:
a. Instrumentation brand name and specifications
b. Certificates of calibration and or manufacturer certificates of compliance
c. Any calculation done external to the instrumentation
14. Displacement.
a. Method used by Contractor to calculate displacement based oil fore and aft
draft
b. Method used by Contractor to calculate lightship displacement
c. Hydrostatic curves
d: Tables listing (fresh and salt water) displacement as a function of draft
certified by a licensed marine surveyor naval architect independent of the
Contractor (feet and tenths of feet)
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Pensacola ODMDS SMMP
e. These methods and tables shall be an accurate reflection of the current
configuration and displacement
15. Hopper Ullage:
a. Sensor brand name and specifications
b Certificates of calibration and or manufacturer certificates of compliance
c. Any calculation done external to the instrumentation
16. Hopper Volume:
a. Method used by Contractor to calculate hopper dredge volume based on
fore and aft hopper dredge ullage
b. Table listing the hopper dredge volume as a function of hopper dredge
ullage, certified by a licensed marine surveyor/ naval architect
independent of the Contractor (feet and tenths of feet).
c. These methods and tables shall be an accurate reflection of the current
configuration and volume
17. Draghead
a. Draghead Depth
l. Sensor brand name and specifications
li. Certificates of calibration and or manufacturer certificates of
compliance
in. Any calculation done external to the instrumentation
b. Draghead Depth Check
i. Method used
li. If applicable, sensor brand name and specifications
in. If applicable, certificates of calibration and'or manufacturer
certificates of compliance
lv. If applicable, any calculation done external to the instrumentation
c. Drag Head Position
l. Sensor brand name and specifications
n. Any calculation done external to the instrumentation
in. Certificates of calibration and'or manufacturer certificates of
compliance
18. Slurry Density and Velocity Sensors:
a. Sensor brand name and specifications
b. Any calculation done external to the instrumentation
c. Certificates of calibration and/or manufacturer certificates of compliance
19. Pump RPM
a. Sensor brand name and specifications
b. Any calculation done external to the instrumentation
c. Certificates of calibration and or manufacturer certificates of compliance
d. Description of the pump for which the RPM is reported
20. Criteria used to determine
a Mnnmum pump effort
b Pumping water
c. Material recovery
d. Pumpout
21. Refractometer:
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Pensacola ODMDS SMMP
a. Brand
b Resolution and accuracy
c Method of calibration
22. Criteria used to determine open/closed status of hopper dredge
23. Documentation of:
a. Test methods used by the Contractor to provide quality control of data
b. Verification that the reported values are applicable for the sensor and
application
24. Remote log m mformation
a. Static IP address (Host)
b. Incoming and outgoing port settings (Host)
c Usemame and password (Host)
25. Log of sensor performance and modifications
26. Log of Contractor data backup as per Section 3.3.7
27. Qualify Control Plan as per section 3.5
a Name of Quality Control Systems Manager
b. Procedures for checkmg collected data against know values
c. Procedures for verifying telemetry is functioning
d. Procedures for verifying DQM computer is on
e. Procedures for verifying DQMOBS is running
Any changes to the computation methods shall be approved by the
National Dredging Quality Management Program Support Center prior to
their implementation.
PART 2 PRODUCTS (Hot Applicable)
PART 3 EXECUTION
3.1 REQUIREMENTS FOR REPORTED DATA
The Contractor shall provide, operate and maintain all hardware and software to
meet these specifications. The Contractor shall be responsible for replacement,
repair and calibration of sensors and other necessary data acquisition equipment
needed to supply the required data.
Repairs shall be completed within 48 hours of any sensor failure. Upon
completion of a repair, replacement, installation, modification or calibration the
Contractor shall notify* the Contracting Office's Representative. The Contracting
Office's Representative may request re-calibration of sensors or other hardware
components at any time during the contract as deemed necessary
The Contractor shall keep a log of sensor repair, replacement, installation,
modification and calibration in the dredge's onboard copy of the DPIP. The log
shall contain a three-year history of sensor maintenance to include: the time of
sensor failures (and subsequent repairs), the time and results of sensor
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Pensacola ODMDS SMMP
calibrations, the time of sensor replacements, and the time that backup sensor
systems are initiated to provide required data. It shall also contain the name of the
person responsible for the sensor work.
3.1.1 Date and Tune
The date and time shall be reported to the nearest second and referenced to UTC
time based on a 24 hour format, mm/dd/yyyy hh:mm:ss
3.1.2 Load Number
A load number shall document the end of a disposal event. Load numbering will
begin at number 1 at the start of the contract, and will be incremented by 1 at the
completion of each disposal event or emptying of the hopper. Whenever possible,
the load number shall be calculated off of the sensors aboard the dredge, and shall
be a mathematically repeatable routine. Efforts shall be made to include logic that
avoids false load number increments while also not allowing the routine to miss
any disposal event. If manual incrementing of the load number is in place, extra
attention shall be paid to this value in the contractor's quality control process
(section 3.5).
3.1.3 Vessel Horizontal Positioning
Horizontal positioning of the antenna location shall be obtained using a
Positioning System operating with a minimum accuracy level of 1 to 3 meters
horizontal Circular Error Probable (CEP). Positions shall be reported as
Latitude/Longitude WGS 84 in decimal degrees. West Longitude and South
Latitude values are reported as negative.
3.1.4 Draghead Horizontal Positioning
Horizontal positioning of the dragheads shall be obtained using a Positioning
System operating with a minimum accuracy level of 1 to 3 meters horizontal
Circular Error Probable (CEP). Positions shall be reported as Latitude/Longitude
WGS 84 in decimal degrees. West Longitude and South Latitude values are
reported as negative.
3 .1.5 Hull status
Open/closed status of the hopper dredge, corresponding to the split/non-split
condition of a split hull hopper dredge shall be monitored. For dredges with
hopper doors, tire status of a single door that is the first opened during normal
disposal operations may be monitored. An "OPEN" value shall indicate the
hopper door is open, or in the case of split hull dredges, the hull is split. A
"CLOSED" value indicates the hopper doors are closed, or in the case of split hull
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dredges, the hull is not split. For this contract, hull status shall register dosed
prior to leaving the disposal area.
3.1.6 Dredge Course
Dredge course-over-ground (COG) shall be provided using industry standard
equipment The Contractor shall provide dredge course over ground to the nearest
whole degree with values from 000 (true north) to 359 degrees referenced to a
clockwise positive dir ection convention.
3.1.7 Dredge Speed
Dredge speed-over-ground shall be provided in knots using industry standard
equipment with a minimum accuracy of 1 knot and resolution to the nearest 0.1
knot.
3 18 Dredge Heading
Dredge heading shall be provided using industry standard equipment The dredge
heading shall be accurate to within 5 degrees and reported to the nearest whole
degree, with values from 000 (true north) to 359 degrees referenced to a
clockwise positive direction convention.
3.1.9 Tide
Tide data shall be obtained using appropriate equipment to give the water level
with an accuracy of + 0.1 feet and a resolution of 0 01 feet. Tide values above
project datum described in the dredging specification shall be entered with a
positive sign, those below with a negative sign.
3 1 10 Draft
Draft measurements shall be made in feet with an accuracy of+0.1 foot, and
reported with a resolution to the nearest 0 01 foot relative to the fore and aft draft
marks Industry standard pressure sensors, or an equivalent system, may be used.
Two draft sensors, one fore and one aft. are required At the discretion of the
DQM Support Center, a system may use other means of measuring drafts if
accuracies and resolution are maintained relative to the draft marks
3 1.11 Hopper Ullage
Fore and aft hopper ullage values shall be measured to the nearest 0 01 foot with a
minimum accuracy of +0.1 foot relative to the hopper dredge's zero reference
elevation. If only two sensors are used, thev shall be mounted in locations as near
as possible to the hopper dredge centerline. and away from discharge flume
turbulence foam, and any structure that could produce sidelobe errors. If one
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sensor is offset to port or starboard, the other sensor shall be offset to the opposite
side of the hopper dredge. If more than one fore or one aft sensor is used, they
shall be placed near the comers of the hopper dredge and the average value of the
fore sensors and the average value of the aft sensors shall be reported
3.1.12 Hopper Volume
Hopper dredge volume shall be reported 111 cubic yards, based on the most
accurate method available for the dredge. The minimum standard of accuracy for
hopper dredge volume is interpolation from the certified ullage table, based on the
average fore and aft ullage readings.
3.1.13 Displacement
Dredge displacement shall be reported 111 long tons, based on the most accurate
method available for the dredge. The minimum standard of accuracy for
displacement is interpolation from the displacement table, based on the average
draft. For this contract the density of water used to calculate displacement shall
be kg/cubic meter and shall be used for an additional interpolation
between the fresh and salt water tables.
3.1.14 Empty Displacement
Empty displacement shall be reported in long tons, and shall be the lightship value
of the dredge, or the weight of the dredge with no material in the hopper, adjusted
for fuel and water consumption.
3.1.15 Draghead depths
Draghead depths shall be reported with an accuracy of ±.0.5 feet and a resolution
to the nearest 0.1 feet as measured from the surface of the water with no tidal
adjustments. Minimum accuracies are conditional to relatively calm water.
3.1.16 Slurry- Densities of Dragarms
A density metering device, calibrated according to the manufacturer's
specifications, shall be used to record the slurry density of each dragarm to the
nearest 0.0001 g/cc with an accuracy of + O.OOlg/cc. If the manufacture does not
specify a frequency of re-calibration, calibration shall be conducted prior to
commencement of work.
3.1.17 Slurry Velocities of Dragarms
A flow metering device, calibrated according to the manufacturer's specifications,
shall be used to record the slurry velocity of each dragarm to the nearest 0.0001
fps with an accuracy of +0 .001 fps. If the manufacture does not specify a
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Pensacola ODMDS SMMP
frequency of re-calibration calibration shall be conducted prior to commencement
of work. The slurry velocity shall be measured m the same pipeline inside
diameter as that used for the slurry density measurement.
3.1.18 Pump RPM
Pump RPM shall be measured with the highest level of accuracy that is standard
on the vessel operational displays, either at the bridge, at the drag tenders
controls, or in the engine room Dredges with multiple pumps per side shall report
RPM for the pump that best describes the dredging process (typically the outboard
pump). If requirements of section 3 .1.19 are determined based 011 pump RPM,
then that value shall be reported
3.1.19 Dragarni Production C riteria
For the purposes of DQM. a dragarm pump can only operate one of three ways
and each shall be mutually exclusive of the other two
3.1.19.1 Minimum Pumping Effort
For Minimum Pumping Effort a 'TRUE" value shall mean the hopper
dredge pumps are idling (assuring minimum dragarm intake velocity) or
off. The logic can be triggered either with Pump revolutions per minute
below a certain idle threshold or dragarm slurry velocity at or below the
idle speed threshold (depending 011 the particular dredge plant and
project). The only permissible values are "TRUE" and "FALSE". The
criteria for minimum pump effort may be unique to each dredge.
3.1.19.2 Pumping Water
For Pumping Water a '•TRUE" value shall indicate the dredge is not
digging material but is pumping water (or very low-density material)
through the dredge punip(s) For example, when the sluny density is less
than 1.05 grams per cubic centimeter, the dredge is considered to be
pumping water Other parameters such as pump vacuum may be used to
satisfy the pumping water requirement These criteria may be unique to
each dredge. The only permissible values are "TRUE" and ""FALSE".
3.1.19.3 Material Recovery
For Material Recovery a "TRUE" value shall indicate the dredge is
digging material. The only permissible values are "TRUE" and "FALSE".
Example; when the sluny velocity is greater than 10 feet per second and
the density is greater than 1.05 grams per cubic centimeter, material
recovery is "TRUE"'. These criteria may be unique to each dredge.
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3.1.20 Pumpout
When the hopper dredge is being pumped out, a "True" value shall be reported;
when it is not, a "False" value shall be reported. The only permissible values are
"TRUE" and "FALSE".
3.2 NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM SYSTEM
REQUIRMENT S
The Dredge shall be equipped with a DQM computer system consisting of a
computer, monitor, keyboard, mouse, printer, data modem, UPS, and network
hub. The computer system shall be a stand alone system, exclusive to the DQM
monitoring system, and will have USAGE DQM software installed on it. If a
hardware problem occurs, 01* if a part of the system is physically damaged, then
the Contractor shall be responsible for repairing it witlun 48 hours of
determination of the condition.
3.2.1 Computer Requirements
The Contractor shall provide a dedicated 011-board computer for use by the
Dredging Quality Management system. This computer shall run the Corps'
software and receive data from the Contractor's data reporting interface. This
computer must meet or exceed the following performance specifications:
CPU:
Hard drive:
RAM:
Ethernet adapter:
Video adapter:
Keyboard:
Mouse:
Monitor:
CD-ROM drive:
Ports:
Intel or AMD processor with a (non-overclocked) clock
speed of at least 3 gigahertz (GHz)
250 gigabytes (GB); internal
2 gigabytes
10 or 100 megabit (Mbit) internal network card with an
RJ-45 connector
Must support resolution of 1024x768 at 16 bit color depth
Standard 101-key
Standard 2-button mouse
17 inch viewable display; must support 1024x768
resolution at 16 bit color depth
16X read speed SX wnte speed
2 free Serial ports with standard 9-pin connectors; 1 free
USB port
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Other hardware: Category 5 (Cat-5) cable with standard RJ-45 plugs
connecting the network adapter to the network hub; one
spare cable
Contractor shall install a fully-licensed copy of Windows XP Professional on the
computer specified above. Contractor shall also install any necessary
manufacturer-provided drivers for the installed hardware.
This computer shall be located and oriented to allow data entry and data viewing,
as well as to provide access to data ports for connection of external hardware. .
Location and orientation shall be subject to Contracting Officer s
Representative's approval.
3.2.2 Software
The DQM computer's primary function is to transmit data to the DQM shore side
database. No other software which conflicts with this function shall be installed on tins
computer. A copy of Symantec pcAnywhere™ 12.5 (Remote and Host) or newer shall
be available on the dredge and installed on the DQM computer (host) and available for
installation on the inspection computer (remote). Information required to log-in on the
DQM computer (host) shall be in included in the DPEP. This shall include the DQM
computers (host) static IP address, data port and status port information as well as any
associated logm name and password. The DQM computer will also have the USACE
provided DQMOBS (Dredge Quality Management Onboard Software) installed on it by
DQM personnel.
3.2.3 Network Hub
The DQM computer shall communicate via IEEE 802 3 Ethernet and the TCP/IP
networking protocol. The Contractor shall provide a network hub to allow the
temporary addition of the Contracting Officer's representative's portable
computer to the computer network. The hub shall provide a minimum of four RJ-
45 ports that support Category 5 (Cat-5) cable with standard RJ-45 plugs
connecting the network adapter to the network hub; one spare cable shall be
available on site to plug into the network hub.
3.2.4 UPS
The Contractor shall supply an Uninterruptible Power Supply (UPS) for the
computer and networking equipment. The UPS shall provide backup power at
IkVA for a minimum of 10 minutes. The UPS shall interface to the DQM
computer to communicate UPS status. The Contractor shall ensure that sufficient
power outlets are available to run all specified equipment.
3.2.5 Printer
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The Contactor shall supply a printer and driver software (when necessary) for use
with the DQM computer. The printer shall support the Universal Serial Bus
interface (cable supplied by the Contractor), and shall have a minimum resolution
of 300 dots per inch and have a rated print speed of 6 pages per minute (black and
white) or higher and support color. Additionally, the printer shall have minimum
paper capacity of 50 pages of 8.5X11 inch paper. The Contractor shall be
responsible for maintaining a supply of printer paper and other consumables such
as printer cartridges. Printer usage will not exceed 500 pages per month.
3.2.6 Internet Access
The Contractor shall provide an internet connection to the DQM computer with
connectivity in the area where they are working. The internet shall be always
available to the DQM computer with connectivity at least 12 out of 24 hours. The
Contractor shall acquire and install all necessary hardware and software to make
this Internet connection available to the DQM on-board computer.
3.2.7 Data Routing Requirements
Onboard sensors shall continually monitor dredge conditions, operations and
efficiency and route this information into the shipboard dredge-specific system
computer (DSS) to assist in guiding dredge operations. Portions of this
Contractor-collected information shall be routed to the DQM computer on a real-
time basis for archival data storage and compilation into summary reports of
dredging operations. Standard sensor data shall be sent to the DQM computer via
an RS-232 19200-baud serial interface. The serial interface shall be configured as
8 bits no parity and no flow control.
3.2.8 Data Measurement Frequency
Disposal activities shall be logged with high temporal and spatial resolution. Data
shall be logged as a series of events. Each set of measurements (i.e. time,
position, etc...) will be considered an event. All required information in section
3.1 shall be collected within one second of the reported time. A data string for an
event shall be sent to the DQM computer every 10 seconds or less; but never
more frequent!}* than once per every 5 seconds.
3.2.9 Data Format
Data shall be reported as an extensible Markup Language (W3C standard XML
1.0) document as indicated below. Line breaks and spaces are added for
readability, but the carnage return, line feed character combination is only added
to delineate records (HOPPER DREDGE_DREDGING_DATA tag) for actual
data transmission.
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•".DREDGE_NAME> string32 "//DREDGE_NAME:>
HOPPER DREDGE_DATA_RECORD
•: DATE_TME:- time date string -JDATE_TIME">
•¦:LOAD_NUMBER • integer string - ./'LOAD_NUMBER ¦¦¦
*"VESSEL_X coordJype = "LL'V- floating point string -.'/VESSEL_X*;-
• VESSEL_Y coord_type = "LL"-- floating point string - .;VESSEL_Y. ¦
«-PORT_DRAG_X coord Jype = ''LL""' ¦ floating point string :.,>PORT_DRAG_X-
PORT_DRAG_Y coordjype = "LL' floating point string ,lPORT_DRAG_Y"
floating point string' /STBD_DRAG_Y-
••HULLjSTATUS > OPEN/CLOSED string -•.,HULL_STATOS>
•:-VESSEL_COURSE.> floating point string ./VESSEL.COURSE ¦>
•:.VESSEL_SPEED'- floating point string -vVESSELJSPEED-
floating point string v.'VESSELJHEADING' -
TIDE floating point string TIDE
DRAFT FORE floating point string DRAFT FORE
DRAFT_AFT floating point string < DRAFT AFT
¦ ULLAGE_FORE - floating point string :/ULLAGE_FORE
¦ -ULLAGEj_AFT'-- floating point string -//ULLAGE JtfT>
- HOPPER DREDGEJVOLUME floating point string /HOPPER DREDGE_VOLUME
-DISPLACEMENT':- floating point string .-/DISPLACEMENT/-
• EMPTY_DISPLACEMENT > floating point string •; /EMPTYJDISPLACEMENT.>
- DRAGHEAD_DEPTH_PORT • floating point string ¦ ¦..-'DRAGHEAD_DEPTH_PORT -¦
DRAGHEAD_DEPTH_STBD floating point string
PORT_VELOCITY floating point string ,PORT_VELOCITY
-:STBD_VELOCITY/ floating point string •/STBDJVELOCITY;-
¦ PUMP_RPM_PORT floating point string UMP_EFFORT_PORT - ti ue false unknow n string ¦vMIN_PUMP_EFFORT_PORT>
¦ MEN JPUMP JEFFORT_STBD - true/false/unknown string -/MIN_PUMP_EFFORT_STBD-
• .PUMP_WATER_PORT/- true/false/unknown string ••.j*PUMP_WATER_PORT"-
•/PUMP_WATER_STBD'-' n ue/false/unknown string •.'/PUMP_WATER_STBD ¦
¦ :PUMP_MATERIAL_PORT::- true/false/unknown string-:
• :PUMP_MATERLA.L_STBD'- true/fake/unknown sti'ing '¦¦./PUMP_MATERIAL_STBD">
• -'PUMP_OUT_ON"' true/false/unknown string «,-^PUMP_OUT_ON>
• //HOPPER DREDGE JD AT A_REC'ORD"-
/HOPPER DREDGEJDREDGINGJDATA '•
Carriage return - ASCII value 13
Line Feed - ASCII value 10
Example
CHOPPER DREDGE_DREDGING_DATA version = "2,0" >
Essayons
CHOPPER DREDGEJDATA_RECORD>
04/11 /2002 13:12:05
102
-80.123333
10.I23345
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10.12335
10.123347
C LOSED
258
3,4
< VES SEL_HEADING>302
-0.1
10.0 5 < /DRAFTJF ORE >
15.13 DRAFT AFT •
10.11 ULLAGEFORE
10.22
CHOPPER DREDGE_VOLUME>2555.2
4444.1
2345.0
5 5.10
DRAGHEAD DEPTH STBD 53 21 DRAGHEAD DEPTH STBD
PORT DENSITY" 1.02 PORTDENSIT Y •
1,03
22. l
2 3.3
false
false
tnie
true
vPUIvlP_MATERIAL_PORT>false
PUMP_MATERL4L_STBD -false PUMP_ MATERIAL STBD
false
Essayons
HOPPER DREDGED AT AREC ORD>
04/11/2002 13:12:10
102- LOAD NUMBER >
-80.123334
10.123346
PORT DRAG X coordjype = "LLM>-80.1233372
10.12336
-80.123340
CLOSED
<\rESSEL_COURSE>259
3.5
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300
-0.1
<.DRAFT_F ORE > 10.00
15.15
10.15
10.20
CHOPPER DREDGE_VOLUME>2555.5CHOPPER DREDGE VOLUME
4444.0
2345.0
55.15
53.19 1,00
1.01
22.5
23.3
false
false
true
true
< PUMP_MATERIAL_PORT>false< /PUMP_M ATERIAL_PORT>
false
false< /PUMP_OUT_ON >
HOPPER DREDGE DATA REC ORD
c/HOPPER DREDGE_DREDGING_DATA>
3.2.10 Data Reporting
The system shall transmit correctly formatted event data XML strings to the DQM
Database continuously from mobilization until the last US ACE post-dredging
survey has been accepted. If the internet connection (section 3.2.6) is non-
operable, either because of hardware failure or poor local operating conditions,
manual backups shall be performed for each day the device is inoperable and
submitted to the DQM center within 48 hours. Instructions on how to backup
DQM data, perform DQM data transfer (Contractor) and the downloadable
executable for Send Data can be found at https://si.usace.aniiv.mil/hoiiper.asps.. In
the event of data transfer, transmission, or hardware failure; a manually recorded
disposal log shall be maintained It shall consist of a series of events. These
events are: start of dredging, end of dredging, pre-disposal and post-disposal
events. Each event shall include: time stamp (GMT), position (Latitude and
Longitude WGSS4) draft, ullage, volume and displacement. Disposal logs shall
be submitted on a daily basis to the Contracting Officer's Representative during
the tune when the system is not operational.
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3.2.11 Contractor Data Backup
The Contractor shall maintain an archive of all data sent to the DQM computer
during the dredging contract. The Contracting Officer's Representative may
require, at no increase in the contract price, that the Contractor provide a copy of
these data covering specified time periods The data shall be provided in the
HTML format which would have been transmitted to the DQM computer. Data
submission shall be via storage medium acceptable to the Contracting Officer's
Representative.
At the end of the dredging contact, the Contractor shall contact the National DQM
Support Center prior to discarding the data to ensure it has been appropriately
archived. The Contractor shall record in a separate section at the end of the
dredge's on-board copy of the DPIP the following information:
a. Person who made the call
b The date of the call
c The DQM representative who gave permission to discard
The same day of the phone call and prior to discarding the data, the
Contractor shall submit a "Data Appropriately Archived e-mail" to the local
districts Contracting Officer's Representative w ith the above information, and Cc:
the DQM Support Center representative providing permission. In addition to the
above information, also include 111 the e-mail:
d Project name and contract number
e. Dredge start and end dates
f. Name of hopper dredge
3.3 PERFORMANCE REQUIREMENTS
The Contractor's DQM system shall be fully operational at the start of dredging
operations and fully certified prior to moving dredge material on the contract (see
Section 1.4, National Dredging Quality Management Program Certification) To
meet contract requirements for operabihty in addition to certification, the
Contractor's system shall provide a minimum 95 percent data return and be
compliant with DPIP requirements (Section 1.5). DPIP compliance is determined
by DQM support team Data return percentage is defined as the total number of
quality data strings sent by the DSS system to the DQM computer divided by the
total possible number of records that could be sent by a system in good working
order. Quality data strings are considered to be those providing accurate values
for at least 34 of the 35 parameters reported. If repairs necessary to restore 95
percent data return are not made witlnn 48 hours, or if the Contractor fails to
report required data within the specified time window for dredge measurements
(see Sections 3.2.8 "Data Measurement Frequency'" and 3.2.10 "Data
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Reporting"); the system will be declared not fully operational, and the Contractor
will be assessed liquidated damages equivalent to the additional oversight hours
that would be required for Corps personnel to be on site from the first full day
after the system is deemed not operational through to the time when the system is
returned to fully operational status. For this contract, the liquidated damages shall
be 5 per day. (A spread sheet of how to calculate this is
available at the DOM support center; this is NOT just the DOM day rare)
3.4 COMPLIANCE INSPECTION AND QUALITY ASSURANC'E CHECKS
For inspections and compliance monitoring the Contracting Officers
Representative shall include, but not be limited to, DQM support center
personnel. The dredging contractor shall provide the Contracting Officers
Representative transportation from the shore to any platform with a DQM
certified system. Transportation to the DQM equipment shall be provided m a
timely manner.
Quality assurance checks are required prior to the commencement of dredging and
at the discretion of a Contracting Officer's Representative periodically throughout
the duration of the contract Detailed instructions for performing these checks and
a spreadsheet for recording the results are available at
http://st.usace.armv.mil/downloads.asp. Incoming data shall be periodically
reviewed to assure compliance with performance requirements outlined in section
3.3.
3.4.1 Displacement (Draft) Check
The Contracting Officer's Representative shall periodically verify the accuracy of
the fore and aft draft sensors by comparing the vessel hull draft marks to the
corresponding sensor readings indicated on the DQM screen. The vessel"s hull
draft reading shall be viewed from a contractor supplied auxiliary vessel circling
the dredge. The Contracting Officer's Representative shall review the difference
between averaged drafts recorded by the instruments and those estimated from
the draft marks to insure that the system is operating within the acceptable
accuracy of approximately iOJ ft in calm seas conditions and shall direct the
Contractor to re-calibrate or repair system components as necessary. This check
may be performed separately or as a part of the Water Load Test
3.4.2 Draghead Depth Check
The Contracting Officer's Representative may require periodic calibration checks
of the reported draghead depth using manual means such as tape measures or
sounding lines to directly measure draghead depth. The Contractor shall furnish a
steel tape, chain, or wire with clearly visible flags/tags placed at 1 foot increments
within the operational range of the dragarm These devices shall be capable of
measuring the depth below the water surface to the lowest fixed point of each
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draghead (often the heel) with sufficient length to measure 5 feet more than the
maximum project depth. Pressure sensors may be used to verify calibration of the
draghead sensors only in areas where current flow past the vessel dragarm cannot
be reduced sufficiently to allow safe handling of manual measuring devices.
Pressure sensors, used for this purpose shall be vented pressure gages and shall be
subjected to an annual manufacturer's calibration. Prior to the dragarm depth
check, the sensor shall be checked at a known depth, and may be required to be
zeroed at this point according to manufacturer's specifications. Care shall be
taken not to kink the cable or restrict the vent during deployment.
The Contracting Officer s Representative shall review the draghead depth data to
insure that the system is operating within acceptable accuracy, and may direct the
Contractor to re-calibrate or repair system components as necessary. If a bubbler
type system is used, weekly calibration of the draghead sensors is recommended,
as they are sensitive to environmental conditions.
3.4.3 Hopper dredge Ullage Check
The Contracting Officer s Representative shall periodically check the reported
hopper dredge ullage using a tape measure or other distance measuring device.
The Contractor shall furnish a clearly readable weighted tape, marked in tenths of
a foot, capable of measuring throughout the full range of hopper dredge depth.
The weight for this tape shall be a 6-inch diameter disk weighing between 2 and 3
pounds. The Contracting Officer's Representative shall review the hopper dredge
ullage data to insure that the system is operating within acceptable accuracy (0.1
feet), and may direct the Contractor to re-calibrate or repair system components as
necessary-. This check may be performed separately or as a part of the Water Load
Test.
3.4.4 Position Check
During inspection the reported position of the dredge shall be verified by
comparison with readings from a handheld GPS receiver. Throughout the
contract, the Contracting Officer' s Representative shall periodically take readings
from an independent GPS to verify locations.
3.4.5 Wat er Load Test
Wafer Tests shall consist of pumping the hopper dredge out to its lowest level and
then filling it to capacity with water, faking ullage and draft measurements at both
levels to determine hopper dredge volume and displacement. The objective of the
water test is to validate the dredge s reported displacement and hopper volumes. If
the results of the water test indicate that the system is not operating within
acceptable accuracy, the Contractor shall correct the deficiencies causing the error,
and repeat the water test until the results are acceptable
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3.5
3.6
The Contractor shall provide a handheld refractometer with automatic
temperature compensation to measure the hopper dredge water specific gravity
during water tests. The refractometer shall be capable of measuring the hopper
dredge water specific gravity with a resolution of 0.001 and minimum accuracy of
+ 0.001. The Contractor shall also provide a water-sampling device to retrieve a
sufficient volume of water from various depths in the hopper dredge to accurately
determine specific gravity with the refractometer, and a sufficient volume of
deionized water for calibration of the device.
CONTRACTOR QUALITY CONTQL
Dredging contractor shall designate a quality control systems manager (QC'SM).
who shall develop and maintain daily procedures to ensure quality control (QC) of
the DQM system. These methods shall include a procedure by winch data being
collected is checked against known values, telemetry is verified to be functioning,
and the DQM computer is verified to be on and the DQMOBS is running These
procedures shall be outlined in the DPIP and submitted prior to the start of the
contract. In the event a Contractor Quality Control (CQC) Report is required,
daily annotations shall be made m the Daily CQC Report documenting all actions
taken on each day of work including all deficiencies found and corrective actions
taken.
LIST OF ITEMS TO BE PROVIDED BY THE CONTRACTOR
DPIP
Sec 1.5 Dredge Plant Instrumentation Plan
DQM SYSTEM
Sensor Instrumentation
DQM Computer
Sec. 3.1 Specifications for Reported Data
Sec. 3.2 National Dredging Quality
Management System Requirements
DREDGE DATA
Event documentation
Dredge Data Backups
Sec 3.2.10 Data Reporting
Sec 3.2.11 Contractor Data Backups
QA EQUIPMENT ON DREDGE
Ullage tape
Dragarm depth chain
Refractometer -measuring in
Sec. 3.4.3 Hopper dredge Ullage Check
Sec. 3.4.2 Draeliead Depth Check
grams/cubic centimeter with a
resolution of 0.001 and a
minimum accuracy of-0 001
with calibration water
Water sampling device
Sec. 3.4.5 Water Load Test
Sec. 3.4.5 Water Load Test
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