MARAIS DES CYGNES BASIN TOTAL MAXIMUM DAILY LOAD

Waterbody / Assessment Unit (AU): Salt Creek Watershed
Water Quality Impairment: Atrazine

1. INTRODUCTION AND PROBLEM IDENTIFICATION

Subbasin: Upper Marais des Cygnes Counties: Lyon, Osage

HUC8: 10290101	HUC10 (12): 1029010103(05, 06)

Ecoregion: Central Irregular Plains, Osage Cuestas (40b)

Drainage Area: Approximately 110 Square Miles

Water Quality Limited Segments:

Main Stem	Tributaries

Salt Creek (29) Mute Creek (92)

Jersey Creek (76)

Designated Uses: Salt Creek (29) is designated for expected aquatic life; Primary
Contact Recreation Class C; Drinking Water Supply; Food Procurement; Groundwater
Recharge; Industrial Use; Irrigation Watering Use; and Livestock Watering Use.

Mute Cr (92) is designated for expected aquatic life; secondary contact recreation class b;
irrigation watering use; and livestock watering use.

Jersey Cr (76) is designated for expected aquatic life; secondary contact recreation class
b; and food procurement.

303(d) Listings: Kansas stream segments monitored by Station SC578, Salt Creek, cited
as impaired by Atrazine in the 2002, 2004, 2008, 2010, and 2012 303(d) lists.

Impaired Use: Chronic Aquatic Life Support

Water Quality Criteria: Domestic Water supply - Atrazine 3 jj.g/1 (ppb) (annual
average, not impaired) (K.A.R. 28-16-28e(c)(3)(A))

Aquatic Life Support - Atrazine Chronic: 3 jj.g/1 (ppb) (impaired)

Aquatic Life Support - Atrazine Acute: 170 jj.g/1 (ppb) (Not Impaired)
(K.A.R. 28-16-28e(c)(2)(D)(ii)) & (Table la; K.A.R. 28-16-28e(d))

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Figure 1. Salt Creek watershed basemap.

2. CURRENT WATER QUALITY CONDITION AND DESIRED ENDPOINT

Level of Support for Designated Uses under 2012-303(d): Not supporting Aquatic
Life.

Stream Monitoring Site and Period of Record: Active KDHE rotational ambient
stream chemistry sampling station SC578 located on Salt Creek near Lyndon. Sampled
during the years of 1990, 1994, 1998, 1999, 2000, 2002, 2006, and 2010.

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Flow Record: USGS gage 06911490 on Salt Creek at Lyndon (1999-2012) and USGS
Gage 06911500 on Salt Creek near Lyndon (1988-1999) were utilized to establish flow
conditions in the watershed. The USGS gage 06911490 is located at the same location
of the KDHE sampling station. For samples collected prior to the use of this gage (prior
to October of 1999) the flow values for each sampling date are based on USGS gage
06911500, which is just downstream of the sampling point a few stream miles.

Table 1. Long term flow conditions as calculated from USGS flow data from USGS

Stream

Avg. Flow

Percent of Flow Exceedance



(cfs)

75%

50%

25%

10%

Salt Creek at

58

1.2

5.8

22.0

77.0

Lyndon
(USGS Gage
06911490)











Salt Creek

75.3

0.72

4.5

27

104.7

near Lyndon
(USGS Gage
06911500)











Salt Creek

66.1

0.9

5.3

24.0

92.0

Combined











Flow from











USGS gages











06911490











and











06911500











(1988-2012)











Precipitation: The average annual rainfall in the watershed is approximately 39.5
inches/year.

Current Condition: This TMDL applies to the chronic aquatic life criterion for atrazine.
Data associated with the sampling stations within the watershed have been divided into
two categories, the runoff period and the non-runoff period. The runoff period includes
the months of April, May, June , and July where runoff and atrazine applications are
likely to occur. These months are associated with the time period atrazine is applied for
herbicide control and is also susceptible to being washed off of the target fields if
precipitation occurs and creates a runoff event. The non-runoff period accounts for
months outside of the runoff season when the use of atrazine is typically not occurring
and rainfall events are less intense, hence atrazine will not runoff of the fields during
these months. Other than the month of August, there is no atrazine impairment during
the nonrunoff period.

Atrazine concentrations in the watershed average 4.87 ug/L during the runoff period at
SC578. The months of June and July have the highest average atrazine concentration of
10.15 ug/1 and 5.15 ug/1 respectively, as seen in Figure 2 and Table 2. As seen in Table

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2, the months of May and July have the fewest samples collected over the period of
record. Figure 2 details each individual sample collected during the period of record by
month. There are no samples over the water quality standard during the nonrunoff period
in any month other than August. Of the the months with observed atrazine violations,
June and August were sampled the most often . As seen in Table 3 and Figure 3, the
years of 1999 and 2000 were sampled more than any other sampling year. Samples were
collected monthly during these two years, which indicates this station was
programmatically selected for more intensive sampling for these two years. According to
the regular schedule for rotational sampling stations, SC578 is a rotational station that is
sampled on a quarterly bases every fourth year. The regularly scheduled rotational
sampling years include 1990, 1994, 1998, 2002, 2006, and 2010. There has not been any
atrazine violations at SC578 since July of 2000. For the past three sampling years there
have only been five samples collected during the runoff season. Since KDHE sampling
occurs without consideration of rainfall or atrazine application dates, the frequency and
magnitude of elevated atrazine levels within the watershed may be missed when sampling
dates are limited.

Table 2. Monthly summary of atrazine samples and average concentrations at SC578.

Month

# of Samples

# of Samples > 3

Monthly Atrazine





ug/L

Average in ug/L

January

2

0

0.3

February

3

0

0.36

March

3

0

0.3

April

5

1

2.2

May

2

0

0.7

June

4

3

10.15

July

2

1

5.15

August

5

2

3.2

September

2

0

1.3

October

3

0

0.6

November

2

0

1.0

December

5

0

0.52

Table 3. Summary of atrazine samples for each sampling year.

Sampling

#of

Atrazine

#of

Runoff

#of

Year

Samples

Average

Runoff

Period

Samples >





(ug/L)

Season

Atz Avg

3 ug/L







Samples

(ug/L)



1990

1

1.2

0

-

0

1994

3

2.57

1

0.3

1

1998

3

2.67

1

7.4

1

1999

12

2.83

4

6.6

3

2000

9

3.61

4

6.85

2

2002

3

0.87

1

0.3

0

2006

3

0.72

1

0.36

0

2010

4

0.67

1

1.2

0

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Figure 2. Atrazine samples at SC578 relative to the sampling month.

SC578 - Salt Creek Atrazine Concentrations

Figure 3. Atrazine Concentrations relative to sampling year

Salt Cr - Atrazine Concentrations Relative to Sampling Year

2000 2002
Sampling Year

~ Nonrunoff Period

Runoff Period

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Figure 4. Annual atrazine concentration averages.

SC578 Salt Creek Annual Average Atrazine Concentrations

As seen in Figure 4 and Table 3, atrazine concentration averages during the runoff period
were the greatest during the sampling years of 1998, 1999, and 2000. There was only
one sample collected during the 1998 sampling runoff period and there were four samples
collected during this same period in both 1999 and 2000.

Streamflows increase substantially from February through May, where higher average
streamflows are maintained through July. Monthly rainfall averages tend to have a
similar pattern as the average streamflow within the watershed. Atrazine applications are
typically the highest during the months of May and June. Atrazine applications that are
trailed by rainfall and runoff events lead to the transport of atrazine off the target fields
and into the streams.

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Figure 5. Monthly average streamflow and rainfall at SC578.

Salt Creek - Monthly Average Streamflow and Rainfall

Figure 6 details the atrazine concentration relative to the percent of flow exceedance in
the watershed. The flow data associated with all samples that exceeded 3 jag/1 indicate
runoff events of varying magnitude occurred within the 14 days prior of the sampling
date. Brief rainfall events are capable of transporting recently applied atrazine from the
target crops and into the streams in the watershed. A summary of the fl ow conditions for
the seven atrazine samples that exceeded the standard at SC578 are detailed in Table 4.
During the lower flow conditions when flows are less than median flows (<5.3 cfs) and
atrazine was detected, it is apparent that flow conditions were unstable, indicating one or
more brief storm events transported atrazine in the watershed. As seen in Figure 7, the
flow conditions prior to the exceedance on July 13, 2000, indicates a brief runoff event
11 days prior to the sampling date and another event that was likely occurring during the
sampling date as seen with the increase in flow on the sampling date. The atrazine
violations observed in August of 1994 and 1999 are likely associated with the runoff of
atrazine applied in June or July. Flow data from 1994 suggests dry conditions throughout
much of July with a late July runoff event. Flow data from 1999 indicates a large runoff
event 5 days prior to the sampling date after dry conditions in July.

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Table 4. Summary of flow conditions for atrazine violations in Salt Creek at SC578.

Sampling Date

Atrazine
Concentration
l-ig/L

Flow on
Sampling Date
(cfs)

Maximum Flow
within 14 days of
sampling date (cfs)
(# of days prior to
sampling event)

Minimum Flow
within 14 days
of sampling
date (cfs)

8/3/1994

7.1

0.61

17 (14 days)

0.42

6/10/1998

7.4

2.1

7.8 (6 days)

2.1

4/15/1999

9.8

2570

2570 (0 days)

10

6/10/1999

13

14

116 (8 days)

14

8/12/1999

3.9

2.2

373 (5 days)

2.2

6/15/2000

19

6.7

47 (1 day)

0.7

7/13/2000

7.8

1

3.2 (11 days)

0.24

Figure 6. Atrazine concentrations relative to percent of flow exceedance in Salt Creek.

SC578 Salt Creek Atrazine Concentrations Relative to Flow Condition

20
'19
18
17
16
15
14
13
12
11
10
9

~

~	~

~~ ~

10

20

30

40	50	e

% of Flow Exceedance

70

80

90

100

~ Nonrunoff Period ¦ Runoff Period

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Figure 7. Flow profile leading up to atrazine violation sampled on 7/13/2000.

Salt Creek Flow Condition for Low Flow Atrazine Exceedance

Date

Desired Endpoints of Water Quality (Implied Load Capacity for Atrazine) in Salt
Creek:

The ultimate endpoint for this TMDL will be to achieve the Kansas Water Quality
Standards fully supporting chronic aquatic life support. The current standard of 3 |ig/L
for atrazine was utilized to establish the TMDL. Seasonal variation has been
incorporated in this TMDL through the documentation of the seasonal (April-July)
occurrence of elevated atrazine levels.

The following endpoints will define achievement of the water quality standards.

1.	Average monthly atrazine exceedances over 3 jj.g/1 will not occur in Salt
Creek or the streams within the Salt Creek watershed.

2.	No individual sample of atrazine will exceed 170 jj.g/1.

3.	Overall annual concentrations will average below 3 jj.g/1 at SC578

The following milestones will establish the baseline of current water quality conditions to
assess interim progress in the watershed.

1.	There will be no atrazine digressions over 3 jj.g/1 in Salt Creek in any month
other than June or July.

2.	There will be no digression of atrazine over 3 jj.g/1 in streams throughout the
watershed during flows less than the long term mean daily flow on Salt Creek.

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3. SOURCE INVENTORY AND ASSESSMENT

The primary source of atrazine entering the Salt Creek watershed is attributed to the
application of atrazine prior to rainfall events that lead to overland runoff of cropland
during the months of April, May, June, and July. Atrazine has been widely utilized since
the 1960's for selective control of broadleaf and grass weeds in corn and grain sorghum.
There is an economic value associated with the application of atrazine to specific crops.
However, atrazine is highly soluble in water and is susceptible to removal from cropland
during overland runoff events, which impacts water quality. The actual timing of
atrazine application in each subwatershed, the localized rainfall over each stream, the
slope and soil conditions in each subwatershed and the impact of any pesticide Best
Management Practice utilized by individual farmers complicates the true relation between
rain and atrazine loading.

Land Use: The land cover in the Salt Creek watershed is dominantly grassland and
cropland. Table 5 further details the percentages of all landuse acres in the watershed.
As seen in Figure 8, cropland is the predominant land cover lying along the main
segments of Salt Creek.

Table 5. Landuse acreage in the Salt Creek Watershed.

Landuse

Acres

Percent of Watershed

Grassland/Pasture

48309

68.90

Cultivated Crops

13138

18.74

Forest

4126

5.88

Developed

3944

5.63

Open Water

433

0.62

Wetlands

164

0.23

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Figure 8. Landuse map for Salt Creek watershed.

Cultivated Crops
Developed
Forest
Grassland
Open Water
Wetlands

O

% .

Cr

Point Sources: There are four NPDES facilities located within the Salt Creek watershed
(see Appendix A). Since atrazine is associated with agricultural nonpoint source
pollution, point sources are not a source of impairment under this TMDL.

Contributing Runoff: The watershed of Salt Creek has a mean soil permeability value
of 0.41 inches/hour, ranging from 0.01 to 1.29 inches/hour according to the NRCS
STATSGO database. According to a USGS open-file report (Juracek, 2000), the

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threshold soil-permeability values that represents very high, high, moderate, low, very
low, and extremely low rainfall intensity, were set at 3.43, 2.86, 2.29, 1.71, 1.14, and
0.57'7hour, respectively. The lower rainfall intensities generally occur more frequently
than the higher rainfall intensities. The higher soil-permeability thresholds imply a more
intense storm during which areas with higher soil permeability potentially may contribute
runoff. Runoff is chiefly generated as infiltration excess with rainfall intensities greater
than the soil permeability. As soil profiles become saturated, excess overland flow is
produced. For the Salt Creek watershed, runoff will be produced by a rainfall event
producing 1.14 inches/hour rain in approximately 61% of the watershed, and a rainfall
event producing 1.29 inches/hour of rain will produce runoff over the entire watershed
based on the soil permeability values in the watershed. Cropland runoff attributes to the
atrazine impairment within the watershed.

Livestock Waste Management Systems: There are eleven certified or permitted
confined animal feeding operations (CAFOs) within the Salt Creek watershed (see
Appendix B). These facilities are designed to retain a 25-year, 24-hour rainfall/runoff
event as well as an anticipated two weeks of normal wastewater from their operations.
Typically, this rainfall event coincides with streamflow that occurs less than 1-5% of the
time. Though the total potential number of animals is approximately 4,070 head in the
watershed, the actual number of animals at the feedlot operations is typically less than the
allowable permitted number. According to the Kansas Agricultural Statistics, as of
January 1, 2011 the estimated number of all cattle and cows for Lyon and Osage counties
are 65,000 and 34,000 respectively. Livestock facilities do not contribute to the atrazine
impairment within the watershed.

County Agricultural Statistics: According to the United States Department of
Agriculture Statistics Service and as seen in Figure 9, herbicides are reported to have
been applied to 110,028 acres and 124,337 acres in Lyon and Osage Counties
respectively during 2007. As seen in Table 6, the majority of the row crop acres planted
in the watershed include soybeans and corn. Soybeans account for 71% and 65% of the
planted row crop acres in Lyon and Osage counties respectively. The acres planted in
corn have steadily increased over the past five years and account for 26% and 30% of the
planted row crop acres in Lyon and Osage counties respectively. Based on the acres of
herbicides applied compared to the acres of row crops within these counties, herbicides
are likely applied to all of the row crops within the watershed. Atrazine applications are
specific to corn and sorghum, however soybean stubble may be subject to atrazine
application if corn or sorghum are to be planted the following spring.

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Table 6. Kansas Farm Facts for Osage and Lyon Counties.

Year

Lyon County

Osage County

Corn
Acres
Planted

Sorghum
Acres
Planted

Soybean
Acres
Planted

Corn
Acres
Planted

Sorghum
Acres
Planted

Soybean
Acres
Planted

2004

24,500

6400

61,200

24,900

9700

55,800

2005

26,200

5500

70,900

29,900

9200

66,600

2006

22,300

3000

74,700

25,000

6000

71,800

2007

24,000

3900

66,100

28,300

6700

59,800

2008

24,800

3600

67,200

29,500

5700

64,200

2009

26,000

2300

76,000

31,500



70,500

2010

30,500

1400

84,000

39,000

1700

73,000

2011

32,000

1700

80,000

40,000

1500

71,000

Figure 9. Herbicides applied to Lyon and Osage Counties (Kansas Agricultural
Statistics).

Acres of Herbicide Applied by County

140000 n

1997	2002	2007

Census Year

On-site Waste Systems: Households outside of the City of Lyndon and Osage City are
presumably utilizing on-site septic systems. The Spreadsheet Tool for Estimating
Pollutant Load (STEPL) was utilized to identify the number of septic systems within the
HUC12s within the watershed. According to STEPL, there are approximately 389 septic
systems within the Salt Creek watershed with an anticipated failure rate of 0.93%. On-
site septic systems are not a source contributing to the atrazine impairment within the
watershed.

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4. ALLOCATION OF POLLUTION REDUCTION RESPONSIBILITY

The application and subsequent runoff of atrazine from cropland in the Salt Creek
watershed is the primary factor for the elevated amounts of atrazine seen in the
watershed.

Point Sources: Since this pollutant is associated with agricultural nonpoint source
pollution, a Wasteload Allocation of zero will be assigned to point sources for atrazine
under this TMDL.

Nonpoint Sources: All load allocations will be assigned to station SC578 on Salt Creek.
The TMDL and load allocations are based on a load duration curve approach as seen in
Figure 10. Table 7 details the atrazine TMDL based on the monthly average streamflows
over the period of record and compares these against the crrent monthly average atrazine
concentrations and loads during the specified months. The months of June, July, and
August require reductions within the period for stations SC578. The estimated necessary
average load reduction for the combined June to July period is 64.6% at station SC578.

Table 8 details the TMDL at the average annual flow condition at SC578 over the period
of record, which applies to any given day throughout the year. The Load Allocation at
the average flow condition is 1.07 lbs/day at SC578, which is located on the Salt Creek
segment 29.

Table 7. Current average monthly atrazine loads and necessary reduction to meet the

Month

Atrazine

Average

Average

TMDL

Load



Average

Flow (cfs)

Load in

(lbs/day)

Reduction



(ug/L)



lbs/day



(%)

April

2.2

111.9

1.33

1.81

0

May

0.7

171.87

0.65

2.78

0

June

10.15

131.31

7.20

2.13

70.4

July

5.15

53.61

1.49

0.87

41.7

August

3.2

16.69

0.29

0.27

6.25

June-July

8.48

91.82

4.20

1.49

64.6

Annual

2.39

66.01

0.85

1.07

0

Table 8. Salt Creek Atrazine TMD

^ at average flow.

Station/Segment

Wasteload

Load

TMDL



Allocation

Allocation

(lbs/day)



(lbs/day)

(lbs/day)



SC578, Salt

0

1.07

1.07

Creek Segment







29







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Figure 10. Atrazine TMDL on Salt Creek at SC578.

Salt Creek Atrazine TMDL

% of Flow Exceedance

Salt Creek Alrazir.a TMDL	¦ Nonrunoff Penod Samples	a Runoff Parios Samples

Defined Margin of Safety: The margin of safety is implicit since this TMDL applies to
Salt Creek under all flow conditions when the only period that substantiates a TMDL are
during the months of June, July, and August. In addition, the TMDL identifies necessary
load reductions for the period from June through August when the annual atrazine
average requires no load reductions. The flow data has been combined between the two
USGS gages in the watershed to calculate the flow and loads in this TMDL and the gages
differences in drainage areas and periods of record are an implicit margin of safety
utilized to calculate the flow and loads within the watershed.

State Water Plan Implementation Priority: The endpoints of this TMDL will likely be
achieved if atrazine best management practices are implemented, though there have been
no atrazine violations since 2000. Since atrazine concentrations have been compliant
with the water quality standard during the past three sampling years in the Salt Creek
watershed, this TMDL will be a Low Priority for implementation.

Unified Watershed Assessment Priority Ranking: The Salt Creek watershed lies
within the Upper Marais des Cygnes Subbasin (HUC8: 10290101) with a priority ranking
of 5 (High Priority restoration work).

Priority Stream segments: The priority focus should be the implementation within row
crop areas adjacent to Salt Creek and its primary tributaries within the watershed.

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5. IMPLEMENTATION

Desired Implementation Activities: The best way to reduce atrazine loading caused by
agricultural practices is to ensure that Best Management Practices (BMPs) are being
implemented within the watershed. In addition, it is important to educate the agricultural
community on atrazine application rates, timing, alternatives, and label instructions. The
Kansas State Extension Office has numerous publications available that will assist in the
implementation of BMPs throughout the watershed.

1.	Implement proper mix of pesticide application best management practices,
including: soil incorporation, application timing and rates, split applications,
reduced soil-applied rates, post emergence applications, band applications,
alternative weed control methods and buffer zones.

2.	Implement necessary best management practices at storage and handling sites.

3.	Install necessary grass buffer strip along streams.

4.	Ensure label compliance by applicators.

Implementation Programs Guidance:

Nonpoint Source Pollution Technical Assistance - KDHE

a.	Support Section 319 demonstration projects for reduction of atrazine runoff
from corn and grain sorghum cropland.

b.	Provide technical assistance on practices geared to the establishment of
vegetative buffer strips.

c.	Guide federal programs, such as the Environmental Quality Improvement
Program & Conservation Security Program, to support installation of pesticide
Best Management Practices to the cropland drained by the Salt Creek
watershed.

Water Resource Cost Share & Nonpoint Source Pollution Control Program -

Kansas Department of Agriculture, DOC:

a.	Support installation of pesticide management sites for storage, mixing and
handling of atrazine and other pesticides.

b.	Support pesticide best management practices to minimize pesticide runoff.

Water Quality Standards - KDHE

a.	Request EPA finalize its aquatic life criteria for atrazine.

b.	Incorporate revised atrazine criteria into Kansas surface water quality
standards once criteria are finalized by EPA.

Riparian Protection Program - Kansas Department of Agriculture, DOC

a.	Establish or reestablish natural riparian systems, including vegetative filter
strips along small tributaries.

b.	Develop riparian restoration projects in cropland areas.

Buffer Initiative Program - Kansas Department of Agriculture, DOC

a. Install buffer strips along small streams.

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b. Work in conjunction with federal Conservation Reserve Enhancement
Program and Conservation Security Program to hold marginal riparian land
out of production.

Extension Outreach and Technical Assistance - Kansas State University

a.	Educate corn and grain sorghum producers on pesticide management and
effective BMPs that reduce atrazine runoff.

b.	Provide technical assistance on buffer strip design, techniques to minimize
cropland runoff and construction of pesticide handling pads.

Pesticide Management Program - Kansas Department of Agriculture

Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) authorizes a State to
regulate the sale or use of any federally registered pesticide in the State (FIFRA Section
24(a)). Under FIFRA, Kansas is authorized to initiate the process of making label
changes on the use, application and provision of environmental protection of pesticides, if
necessary to assure the attainment of the Water Quality Standard within this basin. The
Kansas Department of Agriculture is the designated agency in Kansas that has pesticide
management authority. Atrazine loads may be reduced through voluntary adoption of
management practices. Among the activities promoted by the Kansas Department of
Agriculture:

a.	Implement pesticide bulk containment regulations.

b.	Ensure label compliance by pesticide applicators

c.	Harmonize product labels regarding use and protection measures

d.	Implement any applicable provisions of the Atrazine Interim Reregi strati on
Eligibility Decision by EPA

e.	Continue basin pesticide education efforts through Kansas State and
commodity associations.

Timeframe for Implementation: Pollutant reduction strategies and practices should be
initiated by 2014 and continue through 2023.

Targeted Participants: The primary participants for implementation will be agricultural
operations immediately adjacent to streams within the watershed that apply atrazine.
Conservation district personnel and county extension agents should conduct a detailed
assessment of sources adjacent to streams within the watershed over 2014.

Implementation activities should target those areas with the corn and sorghum acreage
that are located within a half mile of the streams within the watershed.

Milestone for 2017: In accordance with the TMDL development schedule for the State
of Kansas, the year 2017 marks the next cycle of 303(d) activities in the Marais des
Cygnes Basin to review data from the Salt Creek watershed to assess improved
conditions. Should the impairment continue, adjustments to source assessment,
allocation, and implementation activities may occur.

Delivery Agents: The primary delivery agents for program participation will be the
State Conservation Commission, the Kansas University Extension Service and the

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Kansas Department of Health and Environment. Ideally, implementation decisions and
scheduling will be guided by planning documents prepared through WRAPS.

Reasonable Assurances:

Authorities: The following authorities may be used to direct activities in the watershed to
reduce pollution.

1.	K.S.A. 2-2439 empowers the Secretary of Agriculture to oversee pesticide
management, registration and use in the state.

2.	K.S.A. 2-2472 empowers the Secretary of Agriculture to establish Pesticide
Management Areas to protect public health, safety, and welfare and the
natural resources of the state from pesticide pollution.

3. K. S. A. 65-171 d empowers the Secretary of KDHE to prevent water pollution
and to protect the beneficial uses of the waters of the state through required
treatment of sewage and established water quality standards and to require
permits by persons having a potential to discharge pollutants into the waters of
the state.

4.	K.S.A. 2-1915 empowers the State Conservation Commission to develop
programs to assist the protection, conservation and management of soil and
water resources in the state, including riparian areas.

5.	K.S.A. 75-5657 empowers the State Conservation Commission to provide
financial assistance for local project work plans developed to control nonpoint
source pollution.

6.	K.S.A 82a-901, et seq. empowers the Kansas Water Office to develop a state
water plan directing the protection and maintenance of surface water quality
for the waters of the state.

7.	K.S.A. 82a-951 creates the State Water Plan Fund to finance the
implementation of the Kansas Water Plan, including selected Watershed
Restoration and Protection Strategies.

8.	The Kansas Water Plan and the Marais des Cygnes Basin Plan provide
guidance to state agencies to coordinate programs intent on protecting water
quality and to target those programs to geographic areas of the state for high
priority in implementation.

9.	The Federal Insecticide, Fungicide and Rodenticide Act authorizes the state to
initiate the process of making label changes on the use, application and
provision of environmental protection of pesticides.

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Funding: The State Water Plan Fund annually generates $16-18 million and is the
primary funding mechanism for implementing water quality protection and pollutant
reduction activities in the state through the Kansas Water Plan. The state water planning
process, overseen by the Kansas Water Office, coordinates and directs programs and
funding toward watersheds and water resources of highest priority. Typically, the state
allocates at least 50% of the fund programs supporting water quality protection through
the WRAPS program. This watershed and its TMDL are a Low Priority consideration.

Effectiveness: The key to effectiveness in reducing atrazine levels in the Salt Creek
watershed will be determined by the participation of corn and grain sorghum producers in
the watershed to reduce inputs, particularly during the application window of wet weather
in June and July.

6. MONITORING

KDHE will continue to collect samples through 2023 at the rotational station SC578 on
Salt Creek on a quarterly basis every fourth year.

7. FEEDBACK

Public Notice: An active internet website was established at
http://www.kdheks.gov/tmdl/index.htm to convey information to the public on the
general establishment of TMDLs and specific TMDLs for the Marais des Cygnes Basin.
This TMDL was initially posted on the website on May 3, 2013 for public review.

Public Hearing: A Public Hearing on the Marais des Cygnes River Basin TMDLs was
held on May 23, 2013 in Ottawa to receive comments. Public comments for this TMDL
were held open from May 4 through June 7, 2013. KDHE did not receive any comments
regarding this TMDL.

Basin Advisory Committee: The Marais des Cygnes River Basin Advisory Committee
met to discuss this TMDL on September 14, 2012 in Fort Scott.

Milestone Evaluation: In 2017, evaluation will be made as to the degree of impairment
continuing to occur within the watershed. Subsequent decisions will be made regarding
the implementation approach, priority of allotting resources for implementation and the
need for additional or follow up implementation in this watershed at the next TMDL
cycle for this basin in 2017 with consultation from local stakeholders and the BAC.

Consideration for 303(d) Delisting: Salt Creek will be evaluated for delisting under
section 303(d), based on the monitoring data over 2013-2022. Therefore, the decision for
delisting will come about in the preparation of the 2024-303(d) list. Should
modifications be made to the applicable water quality criteria during the implementation

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period consideration for delisting, desired endpoints of this TMDL and implementation
activities might be adjusted accordingly.

Incorporation into Continuing Planning Process, Water Quality, Management Plan
and the Kansas Water Planning Process: Under the current version of the Continuing
Planning Process, the next anticipated revision would come in 2014, which will
emphasize implementation of WRAPS activities. At that time, incorporation of this
TMDL will be made into the WRAPS. Recommendation of this TMDL will be
considered in the Kansas Water Plan implementation decisions under the State Water
Planning Process for Fiscal Years 2013-2022.

November 6, 2013

Bibliography

Devlin, D.L.; Water Quality Pamphlet: Best Management Practices for Atrazine;

Cooperative Extension Service, Kansas State University; Pamphlet MF-2182;
March 1996.

Juracek, K.E., 2000. Soils- Potential Runoff. U.S. Geological Survey Open-File Report
00-253. Information available on the internet at www.KansasGIS.org . Accessed
on October 3, 2012.

United States Department of Agriculture National Agricultural Statistics Service, Kansas
Field Office. In Cooperation with Kansas Department of Agriculture.

Kansas Farm Facts, 2006 through 2010. Access on the internet at
http://www.nass.usda.gov/Statistics by State/Kansas/Publications/Annual Statist
ical Bulletin/index.asp . Accessed on October 3, 2012.

Perry, C.A., D.M. Wolock and J.C.Artman, 2004. Estimates of Flow Duration, Mean

Flow, and Peak-Discharge Frequency Values for Kansas Stream Location, USGS
Scientific Investigations Report 2004-5033.

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Appendix A. NPDES Facilities in the Salt Creek Watershed.







NPDES



Permit

Facility Name

Facility City

Number

WLA

I-MC21-PO02

HAMM - LIEBER/PLAGE #74

LYNDON

KS0080853

0

I-MC29-PR01

BUILDERS CHOICE CONCRETE

OSAGE CITY

KSG110139

0

M-MC21-OO01

LYNDON, CITY OF

LYNDON

KS0024821

0

M-MC29-OO01

OSAGE CITY, CITY OF

OSAGE CITY

KS0022675

0

Appendix B. Permitted and Registered CAFO Facilities in Salt Creek Watershed.

Permit

Facility County

Animal
Totals

Permit Animal

WLA

A-MCLY-SA01

Lyon

275

Swine

0

A-MCOS-BA20

Osage

750

Beef

0

A-MCLY-M002

Lyon

60

Dairy

0

A-MCOS-BA11

Osage

450

Beef

0

A-MCOS-BA12

Osage

330

Beef

0

A-MCOS-BA07

Osage

145

Beef

0

A-KSOS-BA05

Osage

800

Beef

0

A-MCOS-BA08

Osage

180

Beef

0

A-MCOS-BA15

Osage

80

Beef

0

A-MCOS-B007

Osage

800

Beef

0

A-MCOS-BA22

Osage

200

Beef

0

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