U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
GRAND LAKE AND SHADOW FOUNTAIN LAKE
GRAND COUNTY
COLORADO
EPAEGIONVIII
WORKING PAPER No, 770
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
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REPORT
ON
GRAND LAKE AND SHADOW MOUNTAIN LAKE
GRAND COUNTY
COLORADO
EPA REGION VIII
WORKING PAPER No, 770
WITH THE COOPERATION OF THE
COLORADO DEPARTMENT OF HEALTH
AND THE
COLORADO NATIONAL GUARD
JULY, J377
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i
CONTENTS
Page
Foreward ii
List of Colorado Study Lakes and Reservoirs iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 6
IV. Nutrient Loadings 12
V. Literature Reviewed 17
VI. Appendices 18
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ii
FOREWORD
The National Eutrophica'tion Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review [§303(c)], clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
In the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
ACKNOWLEDGEMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Colorado Department of
Health for professional involvement, to the Colorado National
Guard for conducting the tributary sampling phase of the Survey,
and to those wastewater treatment plant operators who voluntarily
provided effluent samples.
The staff of the Water Quality Control Division provided
invaluable lake documentation and counsel during the Survey,
reviewed the preliminary reports, and provided critiques most
useful in the preparation of this Working Paper series.
Lt. Colonel Paul A. Parsons, the Deputy Adjutant General of
Colorado, and Project Officer Colonel Hershel C. Yeargan, who
directed the volunteer efforts of the Colorado National Guardsmen,
are also gratefully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES AND RESERVOIRS
STATE OF COLORADO
NAME
Barker
Barr
Blue Mesa
Cherry Creek
Cucharas
Dillon
Grand
Green Mountain
Hoi brook
Meredith
Milton
Navajo
Shadow Mountain
COUNTY
Boulder
Adams
Boulder
Arapohoe
Huerfano
Summit
Grand
Summit
Otero
Crowley
Weld
Archuleta, CO; San
Juan, Rio Arriba, NM
Grand
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SHADOW MOUNTAIN LAKE
A GRAND LAKE
Tributary Sampling Site
X Lake Sampling Site
• Sewage Treatment Facility
SHADOW
MOUNTAIN LAKE
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GRAND LAKE AND SHADOW MOUNTAIN LAKE
STORE! NOS. 0807 and 0813
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Grand Lake and Shadow Mountain
Lake are mesotrophic. Of the 13 Colorado lakes and reservoirs
sampled in 1975, Grand Lake ranked third and Shadow Mountain
Lake ranked fourth in overall trophic quality when compared
using a combination of six water quality parameters*.
1. Grand Lake—Two of the waterbodies had less median
total phosphorus, two had less and one had the same median dis-
solved orthophosphorus, none had less and six had the same me-
dian inorganic nitrogen, two had less mean chlorophyll a_, and
one had greater mean Secchi disc transparency. Some depression
of dissolved oxygen with depth (to 4.8 mg/1 at 67.1 meters)
occurred at station 1 in August.
Survey limnologists did not observe nuisance aquatic growths
during their visits.
In a previous report it is noted that Grand Lake acts as a
sink for materials sedimenting out of natural inflows and pumped
inflows from Shadow Mountain Lake; and, as a consequence, inflow-
outflow conditions make the characteristics of the upper 5 to 10
meters of the lake quite similar to those of Shadow Mountain
Lake (Nelson, 1971).
* See Appendix A.
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2. Shadow Mountain Lake—Four of the waterbodies had less
median total phosphorus, two had less and one had the same
median dissolved orthophosphorus, none had less and six had the
same median inorganic nitrogen, four had less mean chlorophyll
a^ and five had greater mean Secchi disc transparency. No dis-
solved oxygen depression occurred during the sampling. Survey
limnologists did not observe any nuisance conditions.
Shadow Mountain Lake, due to its hydrology and morphemetry,
has been regarded as a reversible flow-through system. At
certain times in the year, it receives nutrients primarily
from secondarily-enriched water pumped from Lake Granby;
and aquatic plants are abundant at times (Nelson, op. cit.).
Although neither lake is presently considered to be eutro-
phic, it has been concluded that orthophosphorus concentrations
are close to or exceed the minimum levels necessary to support
algal blooms, and that the inflow from Shadow Mountain Lake
may be primarily responsible for the enrichment of Grand Lake
(Nelson, op. cit.).
B. Rate-Limiting Nutrient:
The algal assay results indicate that Grand Lake was phos-
phorus limited at the times the samples were collected (08/26/75
and 10/10/75). The lake data indicate phosphorus limitation at
both sampling stations and times.
The results of the algal assays for Shadow Mountain Lake are
not considered representative of conditions in the lake at the
sampling times due to a significant change in nutrients in the
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3
samples during shipment from the field to the laboratory. The
lake data indicate phosphorus limitation at station 1 in August
and at station 3 in August and October. Nitrogen limitation is
indicated at all other sampling stations and times.
C. Nutrient Controllability:
1. Point sources—During the sampling year, point sources
accounted for 9.2% of the total phosphorus load to Grand and
Shadow Mountain lakes. The Grand Lake Sanitation District waste-
water treatment plant contributed 8.8%, and septic tanks serv-
ing lakeshore dwellings contributed an estimated 0.4%. However,
since much of the population around the lakes is seasonal, an
additional investigation would have to be undertaken to deter-
mine the significance of such sources.
The present phosphorus loading of 1.38 g/m2/year is just a
little less than that proposed by Vollenweider (Vollenweider and
Dillon, 1974) as a eutrophic loading (see page 16). In a pre-
vious report it is noted that even though the lakes are not pre-
sently considered eutrophic, system operations combined with
continued sewage input could eventually result in a eutrophic
system (Nelson, op. cit.). The Survey results appear to con-
firm this conclusion since the loading measured during the sam-
pling year was a borderline eutrophic loading.
2. Non-point sources—Non-point sources accounted for 90.8%
of the total phosphorus loading during the sampling year. The
Granby Pump Canal contributed 48.7%, the Colorado River contri-
buted 22.7%, the North Inlet contributed 12.1%, and Echo Creek
contributed 4.8%. The ungaged minor tributaries and immediate
drainage area contributed an estimated 1.3%.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphemetry :
1. Grand Lake;
a. Surface area: 2.05 kilometers2.
b. Mean depth: 41.3 meters.
c. Maximum depth: 81.0 meters.
d. Volume: 84.640 x 106 m3.
2. Shadow Mountain Lake:
a. Surface area: 5.48 kilometers2.
b. Mean depth: 3.8 meters.
c. Maximum depth: 11.0 meters.
d. Volume: 20.600 x 10s m3.
B. Mean hydraulic retention time of the system: 92 days.
C. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean Flow
Name area (km2)* (m3/sec)*
North Inlet 118.9 1.990
Echo Creek 70.4 1.441
Colorado River 264.2 2.500
Granby Pump Canal - 7.310
Minor tributaries &
immediate drainage - 18.1 0.224
Totals 471.6 13.465
t Table of metric equivalents-Appendix B.
tt Anderson, 1974.
* For limits of accuracy, see Working Paper No. 175, "...Survey
Methods, 1973-1976".
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2. Outlet -
Alva B. Adams Aqueduct - 8.990
Colorado River 479.1* 4.280
Total 479.1 13.270
D. Precipitation**:
1. Year of sampling: 52.1 centimeters.
2. Mean annual: 42.7 centimeters.
* Includes area of the lakes.
** See Working Paper No. 175.
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6
III. WATER QUALITY SUMMARY
Grand and Shadow Mountain lakes were sampled two times during the
open-water season of 1975 by means of a pontoon-equipped Huey helicopter.
Each time, samples for physical and chemical parameters were collected
from six or more depths at two stations on Grand Lake and from two or
more depths at three stations on Shadow Mountain Lake (see map, page v).
During each visit, a single depth-integrated (4.6 m or near bottom to
surface) sample was composited from the stations on each lake for phyto-
plankton identification and enumeration; and during both visits, a single
18.9-liter depth-integrated sample was composited from each lake for algal
assays. Also each time, a depth-Integrated sample was collected from each
of the stations for chlorophyll a^ analysis. The maximum depths sampled in
Grand Lake were 67.1 meters at station 1 and 36.9 meters at station 2.
The maximum depths sampled in Shadow Mountain Lake were 1.8 meters at
station 1, 3.7 meters at station 2, and 7.3 meters at station 3.
The sampling results are presented in full in Appendix 0 and are
summarized in the following tables.
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A. SUMMARY Of PHYSICAL AMU CHEMICAL CHARACTERISTICS FOrt GRAND LAKE
STOWET CODE 0307
TEMP
DISS OXY
CNDCTVY (MCHOMCM
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P CMG/L)
OKTHO P (MG/L)
N02«N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORO N (MG/L)
TOTAL N (MG/L)
CHLH°YL A (UG/D
SECCHI (METE"S)
1ST SAMPLING ( 8/26/75)
2 SITES
ri
1.2
*.a
i.
6.3
13.
0.006
0.00?
0.020
0.020
0.200
O.G40
0.220
5.4
2.4
ANGE
- 12.5
7.8
12.
6.9
27.
- 0.23o
- 0.010
- 0.160
- 0.020
- 0.30C
- 0.180
- 0.390
5.5
2.6
MEAN
6.7
7.0
5.
6.5
20.
0.027
0.003
0.056
0.020
0.207
0.076
0.26J
5.4
2.5
MEDIAN
5.2
7.4
6.
6.5
22.
0.011
0.002
0.020
0.020
0.200
0.040
0.220
5.4
?.5
2ND SAMPLING (10/10/75)
2 SITES
KANGE
4.3
6.0
26.
6.5
13.
0.010
0.003
0.020
0.020
0.200
0.040
0.220
4.0
4.3
- 10.7
8.0
49.
7.3
22.
- 0.112
- 0.011
- 0.180
- 0.02C
- 0.400
- 0.200
- 0.420
4.7
4.3
MEAN
8.0
7.1
35.
7.1
18.
0.028
0.005
0.056
0.020
0.229
0.076
0.284
4.3
4.3
MEDIAN
9.5
7.6
34.
7.1
19.
0.018
0.004
0.020
0.020
0.200
0.040
0.260
4.3
4.3
3*0 SAMPLING <10/
0 SITES
KANGE MEAN MEDIAN
~»O«0«««00»O«O»»«O«O«««
o«»«o* -
««««»« .»«««*«««««««»»«»««««•«
»*«»»» — «o«a»«««««»«««»ea«»«««
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A. SUMMARY OF PHYSICAL AND CHEMICAL CHARACTERISTICS FOR SHADO* MOUNTAIN LAKE
STO*ET CODE 0313
PARAMETER
TEMP (C>
DISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCHI (METERS)
1ST SAMPLING ( 8/26/75)
3 SITES
2ND SAMPLING (10/10/75)
3 SITES
RANGE
7.9
6.4
23.
6.6
21.
0.016
0.002
0.020
0.020
0.300
0.040
0.320
3.9
1.5
- 12.2
7.8
26.
7.3
26.
- 0.075
- 0.003
- 0.070
- 0.020
- 0.400
- 0.090
- 0.460
8.1
1.9
MEAN
10.3
7.2
24.
6.9
24.
0.025
0.003
0.038
0.020
0.344
0.058
0.382
6.2
1.8
MEDIAN
11.5
7.6
24.
6.8
24.
0.019
0.003
0.020
0.020
0.300
0.040
0.370
6.5
1.9
RANGE
8.1
5.8
39.
7.0
27.
0.020
0.002
0.020
0.020
0.200
0.040
0.220
4.3
1.5
- 10.0
9.0
43.
7.6
31.
- 0.028
- 0.004
- 0.080
- 0.020
- 0.200
- 0.100
- 0.280
6.0
2.4
MEAN
8.9
7.2
41.
7.3
29.
0.022
0.003
0.046
0.020
0.200
0.066
0.246
5.2
1.9
MEDIAN
8.9
7.8
41.
7.3
29.
0.021
0.003
0.020
0.020
0.200
0.040
0.220
5.4
1.8
3RD SAMPLING (•«/««/«»)
0 SITES
RANGE MEAN MEDIAN
a»»o«a _
»»«««» _«»««»«»»«««««*•»««»«•««
««»«»* _o«««»«»»«««*»»««««««««
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B. Biological characteristics:
1. Phytoplankton -
a. Grand Lake
Sampling
Date
08/26/75
10/10/75
Dominant.
Genera
1. Asterionella sp.
2. Anabaena sp.
3. Cryptomonas sp.
4. Melosira sp.
Total
1. Spondylosium sp.
2. Cryptomonas sp.
31 Melosira sp.
4. Asterionella sp_.
5.' Anabaena sp.
Other genera
b. Shadow Mountain Lake
08/26/75
1.
2.
3.
4.
5.
10/10/75
Total
Apham'zqmenon sp.
Phonmdium sp
Microcystis SJ
Chroomonas sp
Nitzschfa~sp.
Other genera
Total
1. Melosira Lr.
2. As ten'on ell a sp.
3. Cryptomonas sp.
4. Chroomonas (7) sp.
5. Pennate diatoms
Other genera
Algal Units
per ml
523
262
131
87.
1,003
339
.136
136
102
34
33
780
630
.533
388
291
242
486
2,570
Total
1,780
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10
2. Chlorophyll a_ -
Sampling
Date
08/26/75
10/10/75
Station
Number
Grand 1
Grand 2
S. M. 1
S. M. 2
S. M. 3
Grand 1
Grand 2
S. M. 1
S. M. 2
S. M. 3
Chlorophyll a
(yg/1)
5.5
5.4
8.1
6.5
3.9
4.7
4.0
4.3
6.0
5.4
C. Grand Lake Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. August sample -
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
b. October sample -
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
Maximum yield
(mg/1-dry wt.)
0.004
0.054
0.054
0.004
0.075
0.075
1.075
1.075
0.2
4.7
6.3
0.2
Ortho P
Cone, (mg/1)
Inorganic N
Cone. (mg/1)
Maximum yield
(mg/1-dry wt/)
2.
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
Discussion -
The control yields of the assay alga, Selenastrum capri-
cornutum, indicate that the potential primary productivity
0.005
0.055
0.055
0.005
0.085
0.085
1.085
1.085
0.4
3.0
7.9
0.3
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11
of Grand Lake was moderate at the times the samples were
collected. Also, the significant increases in yields with
the addition of phosphorus alone indicate the lake was phos-
phorus limited at those times. Note that the addition of nitro-
gen alone resulted in yields no greater than those of the con-
trols.
The lake data also indicate phosphorus limitation. The mean
inorganic nitrogen/orthophosphorus ratios were 16/1 or greater
at all sampling stations and times.
Due to significant changes in nutrients in the samples
during shipment from the field to the laboratory, the assay re-
sults for Shadow Mountain Lake are not considered representative
of conditions in the lake at the sampling times. The lake data
indicate a combination of limiting nutrients. Following is a
tabulation of the mean N/P ratios at the sampling stations and
times with the indicated limiting nutrient in parentheses.
Station 08/25/75 10/10/75
1 16/1 (P) 11/1 (N)
2 13/1 (N-?) 13/1 (N-?)
3 27/1 (P) 29/1 (P)
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12
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Colorado National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v), except for the high
runoff months of June and July when two samples were collected. Sam-
pling was begun in September, 1974, and was completed in August, 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Colorado District Office of the U.S. Geological Survey for the
tributary sites nearest the lake.
In this report, nutrient loads for sampled tributaries were cal-
culated using mean annual concentrations and mean annual flows.
Nutrient loads for the Alva B. Adams Aqueduct were calculated using
the mean nutrient concentrations at Grand Lake sampling station 1
and the mean annual aqueduct flow.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("ZZ" of U.S.G.S.) were estimated using the mean concentrations
in Unnamed Creek at station F-l of Shadow Mountain Lake and the mean
annual ZZ flow.
The operator of the Grand Lake Sanitation District wastewater treat-
ment plant provided monthly effluent samples and corresponding flow data.
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13
A. Waste Sources:
1. Known municipal -
Name
Pop.
Served
Treatment
Mean Flow
(mg/d)
ctt
Grand Lake SD 1,475" act. sludge 1,356.9
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
Source
a. Tributaries (non-point load) -
North Inlet
Echo Creek
Colorado River
Granby Pump Canal
b. Minor tributaries & immediate
drainage (non-point load) -
c. Known municipal STP's -
Grand Lake SD
d. Septic tanks* -
e. Known industrial - None
f. Direct precipitation** -
Total
2. Outputs -
kg P/
yr
135
920
45
Lake outlets - Adams Aqueduct
Colorado River
Total
130
10,420
3,685
2,295
5,980
3. Net annual P accumulation - 4,440 kg.
Receiving
Water
Shadow Mtn. Lake
% of
total
1,255
500
2,365
5,070
12.1
4.8
22.7
48.7
1.3
8.8
0.4
1.2
100.0
t Treatment plant questionnaire.
tt Population equivalent based on 300 winter residents and a maximum of
5000 summer residents.
* Estimate based on 161 lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
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14
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yjr total
a. Tributaries (non-point load) -
North Inlet 42,235 10.5
Echo Creek 20,950 5.2
Colorado River 83,255 20.7
Granby Pump Canal 239,520 59.5
b. Minor tributaries & immediate
drainage (non-point load) - 3,185 0.8
c. Known municipal STP's -
Grand Lake SD 3,695 0.9
d. Septic tanks* - 1,715 0.4
e. Known industrial - None
f. Direct precipitation** - 8,130 2.0
Total 402,685 100.0
2. Outputs -
Lake outlets - Adams Aqueduct 78,815
Colorado River 120,665
Total 199,480
3. Net annual N accumulation - 203,205 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
North Inlet 11 355
Echo Creek 7 298
Colorado River 9 315
* Estimate based on 161 lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
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15
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary Cone, (mg/1) Cone, (mg/1)
Little Columbine Creek 0.032 0.370
Onahu Creek 0.022 0.657
Unnamed Creek 0.019 0.451
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16
F. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated" Total Accumulated
grams/mz/yr 1.38 0.59 53.5 27.0
Vollenweider phosphorus loadings
(g/m2/yr) based on combined mean depth* and mean
hydraulic retention time of Grand Lake and Shadow Mountain Lake:
"Dangerous" (eutrophic loading) 1.40
"Permissible" (oligotrophic loading) 0.70
* Mean depth of the lakes calculated by adding both volumes and both areas
and dividing the combined volume by the combined area.
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17
V. LITERATURE REVIEWED
Anderson, Dennis P., 1974. Personal communication (lake morphometry)
CO Dept. of Health, Denver.
Nelson, Wesley C., 1971. Comparative limnology of Colorado—Big
Thompson Project reservoirs and lakes. CO Dept. of Nat. Res.,
Fort Collins.
vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research. Nat!.
Res. Council of Canada Publ. No. 13690, Canada Centre for Inland
Waters, Burlington, Ontario.
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VI. APPENDICES
18
APPENDIX A
LAKE RANKINGS
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_*<=• DMA TC BF L'S^D !* PS'^'N
LAKE
CODE LAKE NAME
0801 BACKER RESEHVOIH
Ort02 BAR* LAKE
OH03 BLUE MESA RESERVOIR
080«» CHERRY CREEK LAKE
0805 CUCHARAS RESERVOIR
OBOb DILLON RESERVOIR
0807 GHAND LAKE
0808 GHEEN MOUNTAIN RESERVOIR
0809 HOLBROOK LAKE
0810 LAKE MEREDITH
0811 HILTON RESERVOIR
0812 NAVAJO RESERVOIK
0913 SHADOW MOUNTAIN LAKE.
MEDIAN
TOTAL P
0.023
0.930
0.019
0.054
0.263
0.009
0.013
0.010
0.329
0.397
0.846
0.036
0.020
MEDIAN
0.0*5
1.090
0.0*0
0.040
0.040
0.040
0.04Q
0.040
0.073
0.110
2.280
0.050
0.040
500-
MEAN iEC
419.000
*S1.333
395.750
469.333
490.000
1U1.750
366.500
391.167
490.333
489.667
429.333
479.400
427.000
MEAN
CHLORA
5.333
2(?.767
6.817
-------
~ENT of LAKES *JT^ H»C>H«:P "AI.UES 'NUM^R OF LAKES X'T-- HIG^EK v*i
LA (
87 (
87 (
58 (
5B <
87 (
58 (
25 (
17 (
0 <
33 (
87 (
5)
n
9)
9)
6)
6)
9)
6)
3)
2)
0)
4)
9)
500-
MEAN SEC
67 (
*2 (
75 (
33 <
8 (
100 (
92 (
83 (
0 (
17 (
50 (
25 (
58 (
8)
5)
SD
4>
1)
12)
11)
10)
0)
2)
6)
3)
7)
MEAN
CriLORA
75 (
17 (
42 (
33 (
25 (
92 (
83 (
58 (
d (
0 <
50 (
100 (
67 (
9)
2)
5)
4)
3)
11)
10)
7)
1)
0)
6)
12)
8)
15-
MIN DO
58
29
8
46
0
75
29
92
100
17
75
46
75
( 7)
< 3)
( 1)
( 5)
( 0)
( 8)
( 3)
( 11)
( 12)
( 2)
C 8)
( 5)
( 8)
MEDIAN
DISS OUT MO P
58 1
a i
67 1
50 1
33 1
96 1
79 (
96 <
25 (
17 <
0 1
42 (
79 I
1 7)
! 1)
1 8)
I 6)
[ 4)
I 11)
( 9)
: 11)
; 3)
; 2)
: 0)
5)
; 9) •
INDEX
NO
358
104
35«*
291
157
521
453
479
183
85
1*3
296
433
-------
LAKES RANKED BY INDEX NUS.
RANK LAKE CODE LANE NAME INDEX NO
1 0806 DILLON RLSErtVOH 521
2 0808 GREE'N MOUNTAIN RESERVOIR ^79
3 0807 GHANU LAKE 453
<» 0813 SHAOO* MOUNTAIN LAKE 433
5 0801 BARKER RESERVOIR 358
6 0603 SLUE MESA RESERVOIR 35<»
7 0812 NAVAJO RESERVOIR 296
8 080<» CHERRY CREEK LAKE 291
9 0811 MILTON RESERVOIR 183
10 0809 HOL3ROOK LAKE 183
11 0805 CUCHARAS RESERVOIR 157
12 0802 BARR LAKE 104
13 0810 LAKE MEREDITH 85
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
-4
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
^
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR COLORADO
n/08/76
LAKE CODE 0807
GRAND
AINAGE AREA OF LAKE (SO KM) 197.
I-DRAINAGE
EA(S« KM)
197.6
118.9
70.4
0.0
8.3
.6
NORMALIZED FLOWS (CMS)
JAN
0.0
0.14
0.085
11.19
0.011
FEB
0.0
0.11
0.071
11.47
0.008
MAR
0.0
0.14
0.085
11.04
0.011
APR
0.0
0.71
0.425
8.21
0.045
MAY
0.0
5.10
3.398
7.08
0.170
JUN
0.0
10.19
7.646
3.26
0.283
JUL
0.0
4.39
3.540
8.07
0.113
AUG
0.0
1.27
0.850
9.63
0.071
SEP
0.0
0.71
0.425
8.21
0.051
OCT
0.0
0.57
0.425
9.34
0.040
NOV
0.0
0.34
0.198
9.34
0.023
DEC
0.0
0.17
0.113
11.04
0.011
MEAN
0.0
1.99
1.441
8.99
0.070
0807A1
0807A2
080781
0807C1
0807ZZ
TOTAL DRAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY
0807A2
0807B1
0807ZZ
9
10
11
12
2
3
4
5
6
7
8
9
10
11
12
2
3
4
5
6
7
8
9
10
11
12
2
3
4
5
6
7
8
74
74
74
74
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
0.368
0.368
0.283
0.142
0.099
0.099
0.212
2.832
8.495
7.929
1.699
0.283
0.255
0.184
0.099
0.071
0.071
0.127
1.841
6.230
6.513
1.274
0.028
0.025
0.020
0.014
0.008
0.008
0.020
0.102
0.283
0.227
0.088
28
19
16
14
23
29
19
19
15
12
23
28
19
16
14
23
29
19
19
15
12
23
SUMMARY
197.6
197.6
TOTAL FLOW IN * 149.83
TOTAL FLOW OUT = 0.0
FLOW DAY
FLOW
0.311
0.368
0.283
0.142
0.099
0.113
0.142
4.531
7.929
8.495
1.274
0.227
0.283
0.170
0.085
0.057
0.071
0.085
3.681
6.796
6.796
0.991
28
26
28
26
11.610
3.964
8.778
3.115
-------
TRIBUTARY FLO* INFORMATION F0« COLORADO
LA 479.1
09/24/76
SUB-DRAINAGE
TSIBJTAPr APEA(Si
OR13A1
0813A2
0813B1
081301
0813ZZ
JAN
FE3
MAS
APR
MAY
NORMALlZti) FLO«5(CMS)
J'JN
JUL
AUG
SEP
OCT
-JOv
OEC
MEAN
479.1
264.2
197.6
0.0
18.1
0.71
0.51
0.0
11.04
0.025
0.71
0.43
0.0
11.33
0.020
0.71
0.51
0.0
10.46
0.0?5
0.96
1.84
0.0
5.95
0.099
10.34
7.50
0.0
1.90
0.368
27.18
11.04
0.0
0.15
0.623
5.95
2.97
0.0
4.67
0.249
1.4^
1.42
0.0
8.21
0.156
1.3J
1.13
0.0
b.94
0.110
0.71
1.13
0.0
7.22
0.088
0.71
0.85
0.0
9.20
0.051
0.71
0.57
0.0
10.76
0.025
4.28
2.50
0.0
7.31
0.154
TOTAL DRAINAGE AREA OF LAKE = 479.1
SUM OF SUB-DRAINAGE AREAS = 479.9
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY
0813A1
MONTH YEAR
MEAN FLOW DAY
0813A2
081301
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
I
2
3
4
5
6
7
8
74
74
74
74
75
75
75
75
75
75
75
T*
74
74
7<»
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
1.416
0.703
0.7C8
0.708
0.708
0.708
0.708
6.088
22.937
13.309
1.416
1.133
0.708
0.623
0.425
0.425
0.425
0.425
4.814
8.495
3.964
1.133
12.743
12.176
8.778
11.610
13.309
12.459
10.760
7.362
5.663
9.911
0.704
10.194
28
19
16
14
19
23
29
5
11
12
23
28
19
16
14
18
23
29
5
15
23
23
28
19
16
14
18
23
29
19
19
15
23
23
FLOW DAY
SUMMARY
TOTAL FLOW IN = 119.64
TOTAL FLOW OUT = 51.42
FLOW DAY
FLOW
1.416
0.708
0.708
0.708
0.708
0.708
0.703
0.708 19
20.388 28
12.459 26
1.416
0.934
0.708
0.623
0.396
0.425
0.425
0.425
2.152 19
9.005 28
0.736 26
1.161
12.176
11.044
8.920
13.309
11.893
11.327
9.466
11.751
0.0
0.0 28
0.0 26
10.477
24.919
23.220
2.549
B.920
3. 240
0.396
0.0
0.0
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/08/12
080701
40 14 23.0 105 48 18.0 3
GUANO LAKE
08049 COLORADO
11EPALES 760109 2111202
0999 FEET DEPTH CLASS 00
DATE
FROM
TO
75/08/26
75/10/10
TIME DEPTH
OF
DAY FEET
10 00
10 00
10 00
10 00
10 00
10 00
10 00
10 00
13 40
13 40
13 40
13 40
13 40
13 40
13 40
13 40
0000
0005
0018
0050
0090
0130
0170
0220
0000
0005
0016
0045
0090
0135
0160
0220
00010
MATER
TEMP
CENT
11.8
12.0
10.9
5.4
2.8
1.5
1.2
1.5
10.7
10.2
10.1
9.8
6.3
4.6
4.3
4.3
00300
00
MG/L
7.6
7.6
7.4
7.6
7.0
5.6
4.8
8.0
8.0
7.8
7.6
6.8
6.0
6.0
00077
TRANSP
SECCHI
INCHES
96
168
00094
CNDUCTVY
FIELD
MICHOMHO
10
5
IK
IK
2
9
10
12
28
33
35
31
26
32
34
34
00400
Prl
SU
6.90
6.80
6.65
6.4Q
6.30
6.40
6.50
6.45
7.30
7.30
7.20
7.15
7.10
6.85
6.50
6.80
00410
T ALK
CAC03
MG/L
23
24
23
22
27
22
24
23
19
19
18
13
13
22
19
22
00610
NM3-N
TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.200
0.200
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.400
0.200K
0.200
0.200K
0.200K
0.200K
0.200
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.060
0.110
0.120
0.160
0.020K
0.020K
0.020K
0.020K
0.020K
0.120
0.120
0.180
00671
PMOS-DIS
OUT HO
MG/L P
0.003
0.002
0.002
0.003
0.002
0.010
0.007
0.003
0.011
0.004
0.003
0.003
0.003
0.004
0.004
0.009
DATE
FROM
TO
75/08/26
75/10/10
TIME
OF
DAY
10 00
10 00
10 00
10 00
10 00
10 00
10 00
10 00
13 40
13 40
13 40
13 40
13 40
13*40
13 40
13 40
DEPTH
FEET
0000
0005
0018
0050
0090
0130
0170
0220
0000
0005
0016
0045
0090
0135
0180
0220
00665
PHOS-TOT
MG/L P
0.016
0.013
0.013
C.009
0.009
0.012
0.011
0.009
0.023
0.020
0.016
0.019
0.010
0.010
0.011
0.012
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
5.5
4.7
K« VALUE KNOWN TO BE LESS
INDICATED
-------
STOREf RETRIEVAL DATE 76/Od/12
080703
40 14 41.0 105 49 07.0 3
6*ANO LAKE
08049 COLORADO
11EPALES 760109 3111202
0135 FEET DEPTH CLASS 00
00010
DATE TIME DEPTH WATER
FrtOM OF TEMP
TO DAY FEET CENT
75/08/36 10 55 0000 12.5
10 55 0005 11.9
10 55 0018 11.7
10 55 0050 5.1
10 55 0090 2.9
10 «?5 9131 2.5
75/10/10 14 20 0000 10.5
14 20 0005 10.4
14 20 0016 10.1
14 20 0040 9.3
14 20 0080 6.4
14 20 0120 5.3
00300
DO
MG/L
7.8
7.6
7.4
7.8
6.8
5.8
7.8
7.8
7.8
7.2
6.0
6.0
00077
TRANSP
SECCHI
INCHES
102
168
00094
CNDUCTVY
FIELD
MICHOMHO
7
4
1
IK
6
7
37
34
37
37
36
49
00400
PH
su
6.75
6.60
6.50
6.40
6.30
6.35
7.10
7.25
7.20
7.15
7.00
6.90
00410
T ALK
CAC03
MG/L
16
14
13
13
21
18
22
20
18
16
16
18
00610
NH3-N
TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.200
0.200
0.200
0.200K
0.200K
0.300
0.200
0.300
0.200K
0.200K
0.300
0.200
00630
N02&N03
N-TOTAL
MG/L
0.020
0.020K
0.020K
0.020
0.080
0.090
0.020K
0.020K
0.020K
0.020K
0.080
0.100
00671
PMOS-DIS
ORTriO
MG/L P
0.002
0.002
0.002K
0.002K
0.002K
0.002
0.004
0.003
0.007
0.004
0.003
0.004
DATE
FROM
TO
75/08/26
75/10/10
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
10
10
10
10
10
10
14
14
14
14
14
14
55
55
55
55
55
55
?0
20
20
20
?0
20
0000
0005
0018
0050
0090
0121
0000
0005
0016
0040
0080
0120
MG/L P
0,
0.
0,
0,
0,
0,
0.
0,
0,
0,
0,
0,
.012
.013
.011
.008
.008
,236
.018
.017
.023
.039
.063
.112
UG/L PERCENT
5.4
4.0
K« VALUE *NOWN TO 8F. LFSS
THAN IMDICflTEO
-------
RETRIEVAL DATE 76/09/24
081301
40 1" 41.0 105 49 56.0 3
SrlADU* MOUNTAIN LAKE
080o9 COLORADO
11EPALE5 760109 2111202
0009 FEET DEPTH CLASS 00
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/08/26
75/10/10
11
11
30 0000
30 OOOb
14 55 0000
14 55 0005
00010
• ATER
TEMP
CENT
12.2
12.0
10.0
10.0
00300
DO
MG/L
7.6
7.8
8.6
9.0
00077 0009*
TrtANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
60
60
23
24
42
42
00400
PH
SU
6.65
6.80
7.30
7.60
00410
T ALK,
CAC03
MG/L
22
23
29
31
00610
NH3-N
TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.400
0.200K
0.200K
00630
N02&M03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DI5
MG/L P
0.002
0.003
0.004
0.003
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
75/38/26 11 30 0000 0.075 8.1
11 30 0006 0.022
75/10/10 14 55 0000 U.02d 4.3
14 55 0005 0.020
00031
INCDT LT
BEMNING
PERCENT
K* VALUE KNOWN 'TO ?E LESS
THSN P'niCATEO
-------
STOS£T RETRIEVAL DATE 76/09/2*
081302
40 12 52.0 105 51 00.0 3
SHADOrf MOUNTAIN
080*9 COLORADO
HEPALES 760109 2111202
0012 FEET DEPTH CLASS 00
DATE
FROM
TO
75/06/26
75/10/10
TIME DEPTH
OF
DAY FEET
12 00 0000
12 00 0005
12 00 0009
15 10 0000
15 10 0005
15 10 0012
00010
WATER
TEMP
CENT
12.1
11.7
11.5
9.0
8.7
8.9
00300
DO
MG/L
7.6
7.6
7.6
8.0
7.8
8.0
00077
TKANS?
SECCHI
INCHES
75
96
00094
CNDUCTVY
FIELD
MICWOMHO
26
25
24
40
43
41
14
VY
IHO
26
25
24
40
43
41
00400
PH
su
7.25
7.00
6. dO
7.50
7.40
7.40
00410
T ALK
CAC03
MG/L
26
25
26
27
28
29
00610
NH3-N
TOTAL
HG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.400
0.400
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOb-OIS
ORTMO
MG/L P
0.003
0.002
0.003
0.003
0.002
0.003
DATE
FROM
TO
OF
DAY FEET
75/08/26 12 00 0000
12 00 0005
12 00 0009
75/10/10 15 10 0000
15 10 0005
15 10 0012
0665
iS-TOT
/L P
0.019
0.017
0.026
0.022
0.021
0.023
32217
CHLRPMYL
A
UG/L
6.5
6.0
00031
INCUT LT
REMNING
PERCENT
K» VALUE KNOrfN TO fl£ LESS
THAN
-------
STORET RETRIEVAL DATE 76/09/34
081303
40 12 28.0 105 SO Jl.O 3
SHAOOrf MOUNTAIN LAKE
08049 COLORADO
llErALES 760109 2111202
0024 FEET DEPTH CLASS 00
DATE
FROM
TO
7S/08/2&
75/10/10
DATE
FROM
TO
7b/08/2t>
75/10/10
TIME DEPTH
OF
DAY FEET
12 20 0000
12 20 0005
12 20 0015
12 20 0021
15 25 0000
15 25 0005
15 25 0015
15 25 0024
TIME DEPTH
OF
DAY FEET
12 20 0000
12 20 0005
12 20 0015
12 20 0021
15 ?5 0000
15 25 0005
15 ?5 0015
15 25 0024
00010
MATER
TEMP
CENT
9.2
8.0
8.1
7.9
8.9
8.4
8.1
8.1
00665
PHOS-TOT
MG/L P
0.016
0.017
0.019
0.018
0.020
0.020
0.020
0.022
00300
DO
MG/L
7.2
6.6
6.6
6.4
6.0
5.8
6.0
6.0
32217
CHLRPHYL
A
UG/L
3.9
5.4
00077
TRANS?
SECCHI
INCHES
75
72
00031
INCDT LT
REMNING
PERCENT
00094
CNDUCTVY
FIELU
MICrtOMHO
26
24
23
23
39
40
41
40
00400
PH
SU
7.20
6.60
6.80
6.70
7.20
7.10
7.05
7.05
00410
T ALK
CAC03
MG/L
26
21
21
24
30
28
27
29
00610
00625
NH3-N TOT KJEL
TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
U.020K
0.020K
0.020K
N
MG/L
0.300
0.300
0.400
0.300
0.200K
0.200K
0.200K
0.200K
00630
N02NN03
N-TOTAL
MG/L
0.050
0.060
0.060
0.070
0.070
0.080
0.080
0.080
00671
PHOS-DIS
ORTrlO
MG/L P
0.002
a. 003
0.003
0.003
0.002
0.003
0.002
0.003
K» ViLUF! KNOWN TO *iE LESS
TrlflN INDICATED
-------
APPENDIX E
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STOHET RETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/11/16
75/01/18
75/02/23
75/05/19
75/06/15
75/06/28
75/07/12
75/07/26
75/08/23
11 05
11 05
10 40
14 00
13 55
14 05
15 10
11 15
13 50
0607A1
40 1<» 45.0 105 49 42.0 4
SHADOW MTN LAKE INLET
08 7.5 SHADOW MTN.
0/G3AND LAKE 091041
OVE^FeOw AT GriANU LAKE DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
10630
!&N03
OTAL
IG/L
0.008
0.096
0.120
0.040
0.040
0.030
0.025
0.005
0.005
00625
TOT KJEL
N
HG/L
0.400
0.600
0.200
0.300
0.300
0.250
0.250
0.300
00610
NH3-N
TOTAL
MG/L
0.015
0.024
0.064
0.020
0.015
0.020
0.020
0.032
0.005
00671
PHOS-DIS
ORTMO
MG/L P
0.005
0.008K
0.008K
0.005K
0.015
0.005
0.005K
0.015
0.005K
00665
PhOS-TOT
MG/L P
0.010
0.010K
0.010K
0.030
0.020
0.020
0.010K
0.040
0.020
K VALUE KNOWN TO BE
LESS TrtAN INDICATED
-------
STORE! RETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02«>N03
FROM OF
TO DAY FEET
74/09/28 15 ?5
7<*/ll/16 11 15
75/05/19 15 00
75/06/15 13 30
75/06/28 14 15
75/07/12 15 ?5
75/07/26 11 25
75/08/23 14 10
0807A2
40 15 05.0 105 48 50.0 4
NORTH INLET
08 7.5 GrtAND LAKE
T/G«AND LAKE 110392
SEC HO ttKDG JUST E OF CITY OF GRAND LAKE
11EP4LES 2111204
0000 FEET DEPTH CLASS 00
C630
NN03
OTAL
G/L
0.016
0.048
0.754
0.060
0.020
0.025
0.015
0.010
0.005
00625
TOT KJEL
N
MG/L
0.500
0.400
1.400
0.450
1.050
0.350
0.100
0.200
00610
NH3-N
TOTAL
MG/L
0.015
0.010
0.128
0.015
0.040
0.010
0.020
0.010
0.005K
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.056
0.005
0.005
0.020
0.005K
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.010
0.010K
0.080
0.020
0.010
0.020
0.010
0.010
0.010K
K VALUE KNOKN TO BE
LESS THAN INOICnTED
-------
STORE! RETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/09/28
74/11/16
75/05/19
75/06/15
75/06/28
75/07/12
75/07/26
75/08/23
15 50
11 45
16 00
14 00
14 23
15 45
11 50
14 30
080731
40 14 10.0 105 48 08.0 4
ECHO CREEK
08 7.5 SHADOW MTN
T/GRAND LAKE 091091
BNK 100 FT S END SEC RD .4 MI S M PORTAL
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
&N03
OTAL
IG/L
0.020
0.080
0.060
0.025
0.025
0.020
0.005
0.010
00625
TOT KJEL
N
MG/L
0.600
0.500
0.850
0.350
0.350
0.050K
0.300
00610
NH3-N
TOTAL
MG/L
0.020
0.015
0.020
0.020
0.025
0.015
0.005
0.010
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.005K
0.005K
0.020
0.005K
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.005K
0.010K
0.020
0.010K
0.020
0.010
0.005K
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
031341
HO 12 25.0 105 50 27.0 4
COLOR AiX) RIVER
08 7.5 SHADOW MTN
0/SHADO* MOUNTAIN LAKE 091091
dELO DAM 200 FT £ OF SEC RO
11EPALES 2111204
0000 FEET utPTM CLASS 00
OATE
FROM
TO
7«./09/23
74/11/16
74/12/14
75/01/19
75/02/23
75/03/29
75/05/19
75/06/11
75/06/28
75/07/12
75/07/26
75/08/23
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF '4-TOTAL N
DAY FEET
11
09
12
10
09
10
11
10
13
14
10
13
S5
45
00
00
30
00
00
30
00
25
15
00
MG/L
0
0
2
0
0
0
0
0
0
c
0
0
.056
.040
.160
.10<»
.112
.120
.040
.002
.005
.010
.010
.070
MG/L
0.
0.
1.
0.
0.
0.
2.
0.
0.
0.
0.
0.
400
500
000
500
100
600
400
800
550
200
150
800
00610 00671 00665
NH3-N PMOS-OIS PHOS-TOT
TOTAL ORTMO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
C.
C.
005
005
152
016
024
020
052
035
025
010
005
010
MG/L
0.
0.
0.
0.
0.
0.
G.
0.
0.
0.
0.
0.
p
005*.
005K
032
008K
OOBK
010
020
015
005
005K
005K
005R
MG/L P
0.010
0.010K
0.040
0.010K
0.010
0.015
0.040
0.010K
0.010
0.010K
0.020
K VALUE KNOWN TO 0£
LESS ThAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/2*
0813A2
40 U 10.0 105 51 28.0
COLORADO rtlVEP
08 7.5 SHADOW MTN
T/SHAOOrf MOUNTAIN LArvE
i
-------
STORE! RETRIEVAL DATE 76/09/2*
DATE TIME DEPTH N02&N03
FROM OF
TO OAY FEET
74/09/26
74/11/16
74/12/14
75/01/18
75/02/23
75/05/19
75/06/15
75/06/28
75/07/23
75/07/26
75/08/23
15
11
11
10
14
13
13
IS
11
13
00
00
00
00
10
50
55
10
10
45
0913ol
40 14 45.0 105 49 42.0 4
OUTLET OF G^ANL) LAKE
08 7.5 SHADOW MTN
T/S-iAijO« MOUNTAIN LAKE 091041
OVERFLOW AT DAM .25 MI E rILLTOP RNGER ST
HEPALES 2111204
0000 FEET DEPTH CLASS 00
0630
6. NO 3
OTAL
IG/L
0.016
O.OOri
0.375
0.104
0.112
0.010
0.040
0.030
0.025
0.010
0.010
00625
TOT KJEL
N
MG/L
0.400
0.500
0.500
0.400
0.400
1.650
0.750
0.750
0.250
0.200
0.350
00610
NH3-N
TOTAL
Mii/L
0.005
0.020
0.016
0.020
0.032
n.OOSK
0.020
0.035
0.020
0.035
0.005K
00671
PHOS-OIS
OftTHO
MG/L P
0.005K
O.OOSK
0.016
O.OOSK
O.OOSK
0.005
0.010
O.OOSK
O.OOSK
0.010
O.OOSK
00665
PHOS-TOT
MG/L s>
0.020
0.020
0.030
0.010
0.010K
0.020
0.020
0.040
0.020
Oi040
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
0813C1
40 15 07.0 105 SO 00.0 4
LITTLE COLUMBINE CRE£f\
08 7.5 GRAND LAKE
T/SHAOOW MOUNTAIN LAKE 110392
ST *r 278 riHOG 300 FT E UF 134 JCT
llEr'ALES 2111204
0000 FEET DEPTH CLASS 00
OATE
FROM
TO
74/09/28
74/11/16
75/03/29
75/05/19
75/06/15
75/06/28
75/07/23
75/07/26
75/08/23
TI»«E OEPTH
OF
DAY FEET
13 50
10 40
11 15
12 45
13 10
13 40
14 S5
11 00
13 30
00630
N02
-------
STORE! KETRIEVAL DATE 76/09/24
081301
40 12 25.0 105 50 bS.O ALES 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/09/28
74/11/16
74/12/14
75/01/18
75/02/23
75/03/2'-*
75/04/19
75/05/19
75/06/15
75/06/28
75/07/23
75/07/26
75/08/23
12 30
10 00
12 30
10 10
09 45
10 15
11 30
11 15
10 50
13 05
14 35
10 20
13 10
00630
NO 28. NO 3
N-TOTAL
MG/L
0.104
0.064
0.600
0.104
0.104
0.115
0.135
0.015
0.005
0.015
0.005
3.005
0.055
00625
TOT KJEL
N
MG/L
0.400
0.500
i.eoo
0.800
6.200
1.200
1.550
1.750
1.050
0.800
0.350
0.350
1.430
OC610
NH3-N
TOTAL
MG/L
0.010
0.020
0.1 76
0.016
0.008
C.025
0.030
0.030
0.015
0.050
0.040
0.005K
0.015
00671
PHOS-DIS
OUT HO
MG/L P
0.005K
0.005K
0.048
0.008K
O.OORK
0.005
0.010
0.010
0.005
0.010
0.005K
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.015
0.010
0.060
0.010K
6.010K
0.010
0.015
0.030
0.010
0.040
0.040
0.020
0.010*
K VALUE KNOWN TO BE.
LESS THAN INDICATED
-------
STO&ET RETRIEVAL :ir- 7&/09/2H
0813E1
40 14 05.0 105 50 42.0 4
ONAHJ CREEK
08 7.5 GrfAND LAKE
T/Snftt)0«« MOUNTAIN LAi\E 110392
TRAIL 4DG MO XING 4.5 M FKM ROCKY
HEP ALES 211120t
oooo FEET DEPTH CLASS oo
MTN
DATE
FROM
TO
74/09/2R
74/11/16
75/05/19
75/06/15
75/06/28
75/07/23
75/07/26
75/08/23
TIME OEP"-
OF
DAY FEE'
14 30
10 ?9
12 45
12 20
13 35
16 45
10 48
15 00
00630
N02&N03
N- TOTAL
HG/L
C.016
0.048
0.300
0.005
0.015
0.005
0.010
0.005
00625
TOT KJEL
N
HG/L
0.400
0.500
2.800
0.300
0.550
0.150
0.100
0.050K
C0610
NHJ-N
TOTAL
MG/L
0.010
0.015
0.175
0.020
0.030
0.030
3.005K
0.005K
C0671
PHOS-OIS
ORTHO
MG/L P
0.005
0.005
0.010
0.005
0.010
0.005
0.005K
00665
PHOS-TOT
MG/L P
0.015
0.010K
0.040
0.030
0.020
0.030
0.010
0.020
K VALUE KNOWN TO 3i"
LESS TH/iN INDIC-TEO
-------
STOPET RETRIEVAL DATE 76/0- ?
DATE TIME DEPTl N02&N03
FROM OF
TO DAY FEET
74/09/28 14 15
75/05/19 13 00
75/06/15 11 45
75/06/28 13 10
75/07/23 16 40
75/07/26 10 40
75/08/23 14 50
40 16 25.0 105 50 27.0 4
UNNAMED CKEEK
0,8 7,.5, GrtANLl LAKE
T/SiAJO* MOUNTAIN LAisE 1103*2
TRAlt. rtDG HO XING NEAR GKEEN «TN RANCH
11EPALES 2111204
0000 FEET DEPTH CLASS 00
10631
!&N03
OTAL
IG/L
O.OC-.
o.aot
o.oc;
o.oi:
O.Olt
0.01'.
O.Oi-.
006?5
TOT KJEL
N
MG/L
0.300
1.250
0.450
0.300
0.300
0.150
0.150
00610
NH3-N
TOTAL
MG/L
0.010
0.025
0.020
0.025
0.075
0.005K
0.005K
00671
PHOS-OIS
ORTHO
MG/L P
0.005K
0.036
0.005
0.005K
0.005K
0.005
0.005K
00665
PH05-TOT
MG/L P
0.005
0.050
0.020
0.020
0.020
0.010K
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/09/84
081321 AS081321 P002000
40 14 55.0 105 49 45.0 4
G*ANO LAKE
08 7.5 SHADOW MT.
J/SHADOW MOUNTAIN LAKE 091091
SHADO* MOUNTAIN LAKE
11EPALES 2141204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
75/02/14
CP(T)-
75/02/14
75/03/17
cpm-
75/03/17
75/04/11
CP(T)-
75/04/11
75/05/02
CP(T)-
75/05/02
75/C5/28
CP(T)-
75/05/28
75/06/17
CP(T)-
75/06/17
75/07/09
CP(T)-
75/07/09
75/07/28
CPCT)-
75/07/2H
75/08/19
CP(T)-
75/0 b/ 19
75/09/08
CP(T>-
75/04/08
75/10/01
CP-
75/10/01
75/10/21
CP-
00630
TIME DEPTH N02&N03
OF N-TOTAL
DAY FEET MG/L
11
16
11
16
11
16
11
16
11
16
10
15
11
15
10
14
10
14
11
15
10
15
11
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0
0
0
0
0
0
0
0
0
c
3
2
.160
.160
.640
.300
.300
.150
.050
.025
.075
.025
.800
.200
00625
TOT KJEL
N
MG/L
1.200
l.OOOK
1.400
2.300
4.900
10.500
17.500
16.500
24.500
14.250
11.000
4.600
00610 00671 00665 50051 50053
NH3-N PHOS-DIS PHOS-TOT FLOW CONDUIT
TOTAL cm HO RATE FLOM-MGO
MG/L MG/L P MG/L P INST MGO MONTHLY
0
0
0
0
2
5
6
-
10
8
7
3
0
.410
.350
.190
.590
.800
.250
.400
.000
.150
.100
.400
.059
0.340
0.330
0.230
0.170
0.480
1.150
1.750
3.600
3.100
2.100
2.700
0.740
0.460
0.540
0.420
0.460
1.300
2.900
4.000
4.900
5.325
3.2SO
3.300
1.400
0.500
0.500
0.500
0.500
0.500
0.250
0.300
0.360
0.250
0.200
0.100
0.288
0.500
0.500
0.500
0.500
0.500
0.250
0.300
0.300
0.280
0.250
0.130
0.250
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE
00630
DATE TIME DEPTH NO2&NO3
FROM OF N-TOTAL
TO DAY FEET MG/L
75/11/11 11 00
0.125
00625
TOT KJEL
N
MG/L
s.ooo
081321 A6081321 P002000
40 14 55.0 105 49 45.0 4
GRAND LAKE
08 7.5 SHADOW MT.
D/SHADO* MOUNTAIN LAKE 091091
SHADOW MOUNTAIN LAKE
11EPALE5 2141204
0000 FEET DEPTH CLASS 00
00610
NH3-N
TOTAL
MG/L
0.900
00671
PHOS-DIS
ORTHO
MG/L P
0.460
0066S
PHOS-TOT
MG/L P
1.500
50051
FLOW
RATE
INST MGD
0.342
50053
CONDUIT
FLOW-MGD
MONTHLY
0.400
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |