U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
GRAND LAKE AND SHADOW MOUNTAIN LAKE
GRAND COMY
COLORADO
EPA REGION VIII
WORKING PAPER No, 770
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
QH96 8 E9
No 770
1977
•&G.P.O. 699-440
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REPORT
ON
GRAND LAKE AND SHADOW MOUNTAIN LAKE
GRAND COUN1Y
COLORADO
EPA REGION VIII
WORKING PAPER No, 770
WITH THE COOPERATION OF THE
COLORADO DEPARTMENT OF HEALTH
AND THE
COLORADO NATIONAL GUARD
JULY, 1977
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1
CONTENTS
Page
Foreward ii
List of Colorado Study Lakes and Reservoirs 1v
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 Eutrophication 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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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 Pau-1 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
& GRAND LAKE
Tributary Sampling Site
X Lake Sampling Site
• Sewage Treatment Facility
* 2
I
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 morphometry,
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/mz/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 che 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-
pi an k ton 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 D and are
summarized in the following tables.
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A.
OF DMYSICAL
TEHP (C)
DISS OXY (MG/L)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
OKTHO P (MG/L)
N02«N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INOR& N (MG/L)
TOTAL N (MG/L)
CHLH°YL A (UG/L)
SECCHI (METE°S)
1ST SAMPLING ( 8/26/75)
2 SITES
•RANGE
1.2 - 12.5
4.8 - 7.8
1. - 12.
6.3 - 6.9
13. - 27.
O.OOd - 0.236
0.002 - 0.010
0.020 - 0.160
0.020 - 0.020
0.200 - 0.30C
O.C40 - 0.180
O.?20 - 0.390
5.4 - 5.5
2.4 - 3.6
CHEMICAL CHARACTERISTICS FOrf GRAND LAKE
STORET CODE 0307
2ND SAMPLING (10/10/75)
2 SITES
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
MEOIAN
5.2
7.4
6.
6.5
22.
0.011
0.002
0.020
0.020
0.20G
0.040
0.220
5.4
2.5
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
- 0.020
- 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
MEOIAN
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
3KU SAMPLING <10/ 9/7i)
0 SITES
KJANGE MEAN MEDIAN
_ooo»«»»«coaoe«»«oooo«o
»««««« -«««««««»«»«»«»««*«««»«
— ««oo»ooo»o«»«o«e«e*»«e
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PARAMETER
TEMP (C>
OISS OXY (HG/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 (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/D
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 8/26/75)
3 SITES
CHEMICAL CHARACTERISTICS FOR SHADOW MOUNTAIN LAKE
STORET CODE 0613
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
- 0.40C
- 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
3RU SAMPLING (»«/««/««)
0 SITES
RANGE MEAN MEDIAN
«*»»»» _»»»«»e»»«»o»«*»««««o««
««»««» _«»«»«««««»»««»»»«•*»««
»*«««« _o»««o«»»«»»»«»*«««»«»«
»*«o«o _«»«»»«««*«»«»«•»«»»»•«
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B. Biological characteristics:
1. Phytoplankton -
a. Grand Lake
Sampli ng
Date
08/26/75
Dominant
Genera
1. Asterionella sp.
2. Anabaena sp.
3. Cryptqmonas sp.
4. Melosira sp.
10/10/75
1.
2.
3.
b. Shadow Mountain Lake
08/26/75 1.
2.
3.
4.
5.
10/10/75
1.
2.
3.
4.
5.
Total
Spond.ylosium sp.
Cryptomonas sp.
Melosira s.
4. AsterioneTa sp.
5. Anabaena sp.
Other genera
Total
Apham'zomenon sp.
Phormidium SJD .
Microcystis sp.
Chroomonas sp.
Nitzschia~sp.
Other genera
Total
Melosira sp.
Asterionella sp.
Cryptomonas sp.
Chroomonas (T) sp.
Pennate diatoms
Other genera
Algal Units
per ml
523
262
131
87
1,003
339
136
136
102
34
33
780
2,570
Total
1,780
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10
2. Chlorophyll a_ -
C.
Sampling
Date
08/26/75
10/10/75
Grand Lake Limiting
1.
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
Nutrient Study:
Autoclaved, filtered, and nutrient
a. August sampl
Spike Cmg/l)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
e -
Ortho P
Cone, (mg/1)
0.004
0.054
0.054
0.004
spiked -
Inorganic N
Cone, (mg/1)
0.075
0.075
1.075
1.075
Chlorophyll a
(yg/1)
5.5
5.4
8.1
6.5
3.9
4.7
4.0
4.3
6.0
5.4
Maximum yield
(mg/1 -dry wt.)
0.2
4.7
6.3
0.2
b. October sample -
2.
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
Discussion -
The control
Ortho P
Cone, (mg/1)
0.005
0.055
0.055
0.005
Inorganic N
Cone, (mg/1)
0.085
0.085
1.085
1.085
Maximum yield
(mg/1 -dry wt. ),
0.4
3.0
7.9
0.3
yields of the assay alga, Selenastrum capri-
cornutum, indicate that the potential primary productivity
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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" ("II" 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 II 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
Grand Lake SD
2.
Pop.
Served
=tt
Treatment
Mean Flow
(mVd)
1,356.9
1,475'' act. sludge
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 -
135
920
45
130
10,420
Lake outlets - Adams Aqueduct 3,685
Colorado River 2,295
Total 5,980
3. Net annual P accumulation - 4,440 kg.
Receiving
Water
Shadow Mtn. Lake
kg P/
y_r
1,255
500
2,365
5,070
% of
total
12.1
4.8
22.7
48.7
1.3
8.8
0.4
1.2
100.0
t Treatment plant questionnaire.
ft 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 y_r 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 Vollenwelder (Vollenwelder
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/mVyr 1.38 0.59 53.5 27.0
Vollenwelder 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.s 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. Natl.
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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T0 BE L'K^D !*• PV<'N
LAKE
CODE LAKE NAME
OEtOl BACKER PESEHV01K
0802 BAR* LAKE
Of»03 BLUE MESA RESERVOIR
0804 CHERRY CREEK LAKE
0805 CUCHARAS RESERV01H
0806 DILLON RESERVOIR
0807 GRAND LAKE
0808 GREEN MOUNTAIN RESERVOIK
0809 HOLBROOK LAKE
oaio LAKE MEREDITH
0811 MILTON RESERVOIR
0812 NAVAJO RESERVOIK
0313 SHADOW MOUNTAIN LAKL
MEDIAN
TOTAL P
0.023
0.930
0.019
0.054
0.263
0.009
0.013
0.010
0.324
0.397
0.846
0.036
0.020
MEDIAN
INORG N
0.0*5
1.090
0.040
0.040
0.040
0.040
0.040
0.040
0.073
0.110
2.280
0.050
0.0*0
500-
MEAN sEC
419.000
451.333
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
Ze.767
6.817
-------
Of LAKES *JTi »lf,nc.ft "Al.UES fuUMSFrt OF LAKES s-'T'-.
LAKE
CODE LAKE NAME
OR01 BArtKER HESEKVOIK
0802 BARS LAKE
0803 BLUE MESA RESERVOIR
0804 CHERRY CREEK LAKE
0805 CUCHARAS RESEtfVOlW
0806 OILLON RESEKVOI*
0807 GRAND LAKE
0808 GREEN MOUNTAIN RESERVOIR
0809 HOLdROOK LAKE
0810 LAKE MEREDITH
0811 MILTON PESERVOIrt
0812 NAVAJO RESERVOIR
0813 SHADOW MOUNTAIN LAKE
MEDIAN
TOTAL P
58 I
0 (
75 (
42 (
33 (
100 (
S3 (
92 <
?5 «
17 <
8 (
50 (
67 (
7)
0)
9)
5)
4)
12)
10)
11)
3)
2)
1)
6)
8)
MEDIAN
INORG N
42 (
f (
87 (
87 (
58 <
5P (
87 <
58 (
25 <
17 (
0 <
33 <
87 (
5)
1)
9)
9)
6)
6)
9)
6)
3)
2)
0)
4)
9)
500-
MEAN SEC
67 1
42 1
75 1
33 1
8 1
100 1
92 1
83 1
0 1
17 1
50 1
25 1
58 1
1 8)
1 5)
! 9)
! 4)
[ 1)
1 12)
[ 11)
! 10)
t 0)
t 2)
[ 6)
! 3)
! 7)
MEAN
CHLORA
75 (
17 (
42 I
33 (
25 <
92 (
83 (
58 (
8 (
0 (
50 <
100 C
67 (
9)
2)
5)
4)
3)
11)
10)
7)
I)
0)
6)
12)
8)
15-
MIN DO
58 (
29 1
8 (
46 (
0 (
75 (
29 (
92 (
100 (
17 (
75 (
46 (
75 (
7)
3)
1)
5)
0)
8)
3)
11)
12)
2)
8)
5)
8)
MEDIAN
DISS OHTHO P
53
a
67
50
33
96
79
96
25
17
0
42
79
< 7)
( 1)
( 8)
( 6)
( 4)
( 11)
( 9)
( 11)
( 3)
( 2)
( 0)
( 5)
1 9)
INDEX
NO
358
104
354
291
157
521
453
479
133
85
143
296
433
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
1 0806 DILLON RLSErtVOIK 521
2 oeoa GREE.N MOUNTAIN RESERVOIR 479
3 0807 GrtANU LAKE 453
4 OB13 SHADO* MOUNTAIN LAKE 433
5 0801 BARKER RESERVOIR 358
6 0803 BLUE MESA RESERVOIR 354
7 osi? NAVAJO RESERVOIR 296
a 0804 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
11/08/76
LAKE CODE 0607
GRAND
TOTAL DRAINAGE AREA OF LAKE(SO KM)
SUB-DRAINAGE
TRIBUTARY AREA(S6 KM)
JAN
FEB
197.6
MAR
NORMALIZED FLOWS(CMS)
APR MAY JUN JUL AUG SEP OCT NOV DEC
MEAN
0807A1
0807A2
0807BI
0807CI
0807ZZ
197.6
118.9
70.4
0.0
8.3
0.0
0.14
0.085
11.19
0.011
0.0
0.11
0.071
11.47
9.008
0.0
0.14
0.085
11.04
0.011
0.0
0.71
0.425
8.21
0.045
0.0
5.10
3.398
7.08
0.170
0.0
10.19
7.646
3.26
0.283
0.0
4.39
3.540
8.07
0.113
0.0 0.0
1.27 0.71
0.850 0.425
9.63 8.21
0.071 0.051
0.0
0.57
0.425
9.34
0.040
0.0
0.34
0.198
9.34
0.023
0.0
0.17
0.113
11.04
0.011
0.0
1.99
1.441
8.99
0.070
SUMMARY
TOTAL
DRAINAGE
AREA OF
LAKE •
SUM OF SUB-DRAINAGE AREAS «
197.6
197.6
TOTAL FLOW IN *
TOTAL FLOW OUT a
149.
0.
83
0
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN 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
.025
.020
.014
.008
.008
.020
.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
FLOW DAY
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 FOK COLORADO
09/24/76
uA
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORE! RETRIEVAL DATE 76/08/12
080701
40 14 23.0 105 46 18.0 3
GRAND LAKE
08049 COLORADO
11EPALES 760109 8111202
0999 FEET DEPTH CLASS oo
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
75/08/26 10 00 0000 11.8
10 00 0005 12.0
10 00 0018 10.9
10 00 0050 5.4
10 00 0090 2.8
10 00 0130 1.5
10 00 0170 1.2
10 00 0220 1.5
75/10/10 13 40 0000 10.7
13 40 0005 10.2
13 40 0016 10.1
13 40 0045 9.8
13 40 0090 6.3
13 40 0135 4.6
13 40 0180 4.3
13 40 0220 4.3
00300
DO
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
Pri
SU
6.90
6.80
6.65
6.40
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
IB
13
13
22
19
22
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
0.020
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
PHOS-DIS
OUTHO
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
3.016
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« VALUF KNOWN TO BE LEbS
TW4N INDICATED
-------
STORE! RETRIEVAL DATE 76/Od/12
080702
40 14 M.O 105 49 07.0 3
GitANO LAKE
08049 COLORADO
11EPALES 760109 2111202
0125 FEET DEPTH CLASS 00
DATE
FROM
TO
75/08/26
TIME
OF
DAY
10 55
10 55
10 55
DEPTH
FEET
0000
0005
0018
10 55 0050
75/10/10
10 55
10 S5
14 20
14 20
14 20
14 20
14 20
14 20
0090
0121
0000
0005
0016
0040
0080
0120
00010
WATER
TEMP
CENT
12.5
11.9
11.7
5.1
2.9
2.5
10.5
10.4
10.1
9.3
6.4
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
CNOUCTVY
FIELD
MICROMHO
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&NO3
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
PHOS-DIS
ORTHO
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
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
75/08/26 10 55 0000 0.012 5.4
10 S5 0005 0.013
10 «?5 0018 0.011
10 55 0050 0.008
10 55 0090 0.006
10 55 0121 0.236
75/10/10 14 ?0 0000 0.018 4.0
14 20 0005 0.017
14 ?0 0016 0.023
14 20 0040 0.039
14 ?0 0080 0.063
14 20 0120 0.112
00031
INCDT LT
REMNING
PERCENT
K« VALUE KNOWN TO BF. LFSS
THAN IMDICaTED
-------
RETRIEVAL DATE 76/09/24
081301
40 1<* 41.0 105 49 56.0 3
SrlADU* MOUNTAIN LAKE
COLO>ADO
00010
DATE TIME DEPTH wATER
FROM OF TEMP
TO DAY FEET CENT
75/08/26 11 30 0000 12.2
11 30 OOOb 12.0
75/10/10 14 55 0000 10.0
14 55 0005 10.0
00300
DO
MG/L
7.6
7.8
8.6
9.0
00077 0009<«
TrtANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
11EPALES 760109 2111202
0009 FEET DEPTH CLASS 00
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&N03
M-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DIS
OUT HO
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
75/08/26 11 30 0000 0.075 8.1
11 30 0006 0.022
75/10/10 14 55 0000 U.02ti 4.3
14 55 0005 0.020
00031
INCDT LT
PEMNING
PERCENT
VALUE KNOWN TO ?E LESS
THAN INDICATED
-------
ET RETRIEVAL DATE 76/09/2*
081302
40 12 52.0 135 51 00.0 3
SHAOO* MOUNTAIN LAKE
08049 COLORADO
00010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
75/06/26 12 00 0000 12.1
12 00 0005 11.7
12 00 0009 11.5
75/10/10 15 10 0000 9.0
15 10 0005 8.7
15 10 0012 8.9
11EPALES 760109 2111202
0012 FEET DEPTH CLASS 00
00300
DO
MG/L
7.6
7.6
7.6
8.0
7.8
R.O
00077
THANSP
SECCHI
INCHES
75
96
00094
CNDUCTVr
FIELD
MICHOMHO
26
25
24
40
43
41
00400
PH
su
7.25
7.00
6. 60
7.50
7.40
7.40
00410
1 ALK
CAC03
MG/L
26
25
26
27
28
29
00610
NH3-N
TOTAL
MG/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
PHOS-i)IS
ORTMO
MG/L P
0.003
0.002
0.003
0.003
0.002
0.003
DATE
FROM
TO
75/08/26
75/10/10
TIME DEPTH
OF
DAY FEET
12 00 0000
12 00 0005
12 00 0009
15 10 0090
15 10 0005
15 10 0012
00665
PHOS-TOT
MG/L P
0.019
0.017
0.026
0.022
0.021
0.023
32217
CHLRPHYL
A
UG/L
6.5
6.0
00031
INCUT LT
REMNING
PERCENT
K« VftLUE KNOrfN TO BE LESS
THAN
-------
STORE! RETRIEVAL OATE 76/09/24
081303
40 12 28.0 105 50 Jl.O 3
SHADOW MOUNTAIN LAKE
08049 COLORADO
HErALES 760109 2111202
0024 FEET DEPTH CLASS 00
DATE
FROM
TO
7b/08/2b
75/10/10
DATE
FROM
TO
75/08/20
75/10/10
TIME DEPTH
OF
DAY FEET
12 20 0000
12 20 0005
12 20 0015
12 20 0021
15 25 0000
15 ?5 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
WATER
TEMP
CENT
9.2
8.0
8.1
7.9
8.9
8.<*
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
TRANSP
SECCHI
INCHES
75
72
00031
INCDT LT
REMNING
PERCENT
00094
CNDUCTVY
FIELU
MICftOMHO
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
00630
NH3-N TOT KJEL N02tN03
TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
N
MG/L
0.300
0.300
0.400
0.300
0.200K
0.200K
0.200K
0.200K
N-TOTAL
MG/L
0.050
0.060
0.060
U.070
0.070
0.080
0.080
0.080
00671
PHOS-DIS
OR TrlO
MG/L P
0.002
0.003
0.003
0.003
0.002
0.003
0.002
0.003
K» VALUP KNOWN TO lE LESS
THiN I*OICATED
-------
APPENDIX E
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STOMET HETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/11/16 11 05
75/01/18 11 05
75/02/23 10 40
75/05/19 14 00
75/06/15 13 «55
75/06/28 14 05
75/07/12 15 10
75/07/26 11 15
75/08/23 13 50
0807A1
40 It 45.0 105 49 42.0 4
SHADOrt MTN LAKE INLET
08 7.5 SHADOW MTN.
0/G3ANO LAKE 091041
OtfEriFi-ON AT GrfANU LAKE DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'&.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
MG/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 f
0.010
0.010K
0.010K
0.030
0.020
0.020
0.010K
0.040
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/08/12
0807A2
40 15 05.0 105 48 50.0 4
NORTH INLET
08 7.5 GRAND LAKE
T/GRAND LAKE 110392
SEC HO URDG JUST E OF CITY OF GRAND LAKE
11EPALES 2111204
0000 FEET DEPTH CLASS 00
TIME DEPTH
DATE
FROM OF
TO DAY FEET
74/09/28 15 25
74/11/16 11 15
74/12/14
75/05/19 15 00
75/06/15 13 30
75/06/28 14 15
75/07/12 15 25
75/07/26 11 25
75/08/23 14 10
OC630
N02^N03
N-TOTAL
MG/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 KNOHN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02&NO3
FROM OF
TO DAY FEET
74/09/28 15 50
74/11/16 11 45
75/05/19 16 00
75/06/15 14 00
75/06/28 14 23
75/07/12 15 45
75/07/26 11 50
75/08/23 14 30
080731
40 14 10.0 105 48 08.0 4
ECHO CREEN
08 7.5 SHADOW MTN
T/GRANO LAKE 091091
tiNK 100 FT S END SEC RD .4 MI S W PORTAL
11EPALES 2111204
0000 FEET DEPTH CLASS 00
9630
&NO3
OTAL
G/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
O.OOSK
0.005K
O.OOSK
0.020
O.OOSK
O.OOSK
O.OOSK
00665
PHOS-TOT
MG/L *>
O.OOSK
0.010K
0.020
0.01QK
0.020
0.010
O.OOSK
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATE!)
-------
STORET RETRIEVAL DATE 76/09/24
DATE TIME" DEPTH N02&.N03
FROM OF
TO DAY FEET
7^/09/28
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
11
09
12
10
09
10
11
10
13
14
10
13
^5
45
00
00
30
00
00
30
00
25
15
00
031341
HO 12 25.0 105 50 27.0 4
COLORADO RIVER
OS 7.5 SHADOW MTN
0/SHADCU MOUNTAIN LAKE 091091
dELO DAM 200 FT E OF SEC RO
11EPALES 2111204
0000 FEET UtPTH CLASS 00
0630
&.N03
OTAL
G/L
0.056
0.040
2.160
0.104
0.112
0.120
0.040
0.002
0.005
C.010
0.010
0.070
30625
TOT KJEL
N
MG/L
0.400
0.500
1.000
0.500
0.100
0.600
2.400
0.800
0.550
0.200
0.150
0.800
00610
NH3-N
TOTAL
MG/L
0.005
0.005
0.152
0.016
0.02*
0.020
0.052
0.035
0.025
0.010
C.005
C.010
00671
PrtOS-OIS
ORTHO
MG/L P
O.OOSrv
0.005K
0.032
0.008K
O.OOBK
0.010
G.020
0.015
0.005
0.005K
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.010
O.OlOis
0.040
0.010K
0.010
O.Olb
0.040
0.010K
0.010
0.010K
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STO
-------
STORE! RETRIEVAL DATE 7b/09/24
DATE TIME DEPTH N02fcN03
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 00
11 00
11 00
10 00
1<* 10
13 50
13 55
IS 10
11 10
13 45
canal
40 14 «45.0 105 49
OUTLtT OF GKANU
OB 7.5 SHADQ* MTN
MOUNTAIN LAKE 0916J1
AT DAM .25 MI E rtLLTOP RNGER ST
11EPALES 211120^
0000 FEET DEPTn CLASS 00
0630
&.N03
OTAL
IG/L
3.016
O.OOd
0.375
0.10«
0.11?
0.010
0.000
0.030
0.025
0.010
0.010
00625
TOT KJEL
N
HG/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
M(VL
0.005
0.020
0.016
0.020
O.C32
0.005K
0.020
0.035
0.020
O.C35
0.005K
00671
PHOS-OIS
OfiTHO
MG/L t> .-
0.005K
0.005K
0.016
0.008K
0.008K
0.005
0.010
0.005K
0.005K
0.010
0.005K
00665
PMOS-TOT
MG/L P
0.020
0.020
0.030
0.010
0.010K
0.020
0.020
0.040
0.020
0.040
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
ET HET3IEVAL DATE 76/09/2<»
0813C1
<*0 15 C7.0 105 50 00.0 <.
LITTLE COLUMBINE CREEis
OS 7.5 GRAND LAKE
T/SHAOOw MOUNTAIN LAKE 1103^2
ST x( 278 dHDG 300 FT E UF 13<« JCT
HEr-ALES 211120<.
0000 FEET OEPTri CLASS 00
DATE
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
TIME DEPTH
OF
DAY FEET
13 50
10 40
11 15
12 45
13 10
13 «»0
14 55
11 00
13 30
00630
N02&N03
N-TOTAL
MG/L
0.012
0.032
0.060
0.015
0.005
0.0?5
0.010
0.015
0.005
00625
TOT KJEL
N
MG/L
0.300
0.500
0.250
0.800
0.400
0.300
0.250
0.150
0.200
00610
NH3-N
TOTAL
MG/L
0.005
0.015
0.015
0.035
0.015
0.030
0.0<*5
0.005
0.005K
00671
PHOS-DIS
OR TrIO
MG/L P
0.010
0.015
0.015
0.010
0.020
0.020
0.020
0.015
0.010
00665
PrlOS-TOT
MG/L P
0.025
0.015
0.020
0.050
0.0*0
0.050
0.03C
0.030
0.030
K VALUE KNOWN TO 6E
LESS THAN INDICATED
-------
STORET NETRIEVAL DATE 76/09/24
DATE TIME DEPTH NO2S.N03
FROM OF
TO DAY FEET
74/09/28
74/11/16
74/12/14
75/01/18
75/08/23
75/03/2'-»
75/0^/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
II 30
11 15
10 50
13 05
14 35
10 20
13 10
081301
40 12 25.0 105 SO bS.O 4
GrtA^tfY PUMP CANAL
08 /.5 SHADOW MTN
T/SHAOO* MOUNTAIN LAKE 091091
SEC *0 630G 1 MI SE RT 34 JCT
IIEPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'&N03
OTAL
IG/L
0.104
0.064
0.600
0.104
0.104
0.115
0.135
0.015
0.005
0.015
0.005
0.005
0.055
00625
TOT KJEL
N
MG/L
0.400
0.500
1.800
0.800
0.200
1.200
1.550
1.750
1.050
0.800
0.350
0.350
1.430
OC610
NHJ-N
TOTAL
MG/L
0.010
0.020
0.1/6
0.016
o.ooe
C.025
0.030
0.030
0.015
0.050
0.040
C.C05K
0.015
00671
PHOS-DIS
OrtTHO
MG/L P
0.005K
0.005K
0.046
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 t»
0.015
0.010
0.060
0.010K
0.010K
0.010
0.015
0.030
0.010
0.040
0.040
0.020
0.010K
K VALUE KNOWN TO BL
LESS THAN INDICATED
-------
STOffET 3ET9IEVAL lifr 7ij/09/2<*
0813E1
10 14 05.0 105 50 <>2.0 4
ONAHO CREEK
OS 7.5 GrtAND LAKE
T/SHAOO* MOUNTAIN LAisE 110393
TrtAIL -?OG kO XING 4.5 M F*iM ROCKY MTN
11EPALES 211120'.
oooo FEET DEHTH CLASS oo
DATE
FROM
TO
74/09/2fl
74/11/16
75/05/1*
75/06/15
75/06/28
75/07/23
75/07/26
75/08/23
TIME DEP*-
OF
DAY FEE'
1* 30
10 79
12 45
12 20
13 35
16 45
10 48
15 00
00630
N02&N03
N-TOTAL
MG/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
NH3-N
TOTAL
MG/L
0.010
0.015
0.175
0.020
0.030
0.030
S.005K
0.005K
C0671
PHOS-OIS
OPTMO
MG/L P
0.005
0.005
0.010
0.005
0.010
0.005
0.005K
00665
PHOS-TOT
MG/L f
0.015
0.010K
0.040
0.030
0.020
0.030
0.010
0.020
K VALUE KNOWN 10 3E
LESS TH/iN INOIC-TEO
-------
STORE! RETRIEVAL DATE 76/0- ?
40 16 25.0 105 50 27.0 4
UNNAMED C*EEK
08 7.5 GrtANll LAtvE
T/S-iAOO* MOUNTAIN l_Ai\E 110392
TRAIL. rtOG tfO XING NEAR GKEEN MTN RANCH
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH N02&N02
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
10631
!&N02
OTAL
IG/L
O.OC-
0.20C-
O.OOr
o.oi:
O.OK
0.01'.
J.OH
00625
TOT KJEL
N
HG/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
0.005*
00671
PHOS-OIS
ORTHO
MG/L P
0.005K
0.036
0.005
0.005K
0.005K
0.005
0.005K
00665
PHOS-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
-------
STORET RETRIEVAL DATE 76/09/24
00630
DATE TIME DEPTH N02&N03
FROM OF N-TOTAL
TO DAY FEET MG/L
00625 00610 00671
TOT KJEL NH3-N PHOS-OIS
N TOTAL OUTMO
MG/L MG/L MG/L P
75/02/14
cpm-
75/02/1*
75/03/17
CP(T)-
75/03/17
75/04/11
CP(T)-
75/04/11
75/05/02
CP-
75/05/02
75/05/28
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)-
75/08/19
75/09/OH
CP(T)-
75/09/08
75/10/01
CP(T)-
75/10/01
75/10/21
CP-
11 00
16 00
11 00
16 00
11 00
16 00
11 00
16 00
11 00
16 00
10 00
15 00
11 00
15 00
10 00
14 00
10 00
14 00
11 00
15 00
10 00
15 00
11 00
0.160
0.160
0.640
0.300
0.300
0.150
0.050
0.025
0.075
G.025
3.800
2.200
081321 AS081321 P002000
40 14 55.0 105 49 45.0 4
GRANQ LAKE
08 7.5 SriAOOv MT.
J/SHADOW MOUNTAIN LAKE 091091
SHAOOrf MOUNTAIN LAKE
11EPALES 2141204
0000 FEET DEPTH CLASS 00
00665 50051 50053
PHOS-TOT FLOW CONDUIT
RATE FLOW-MOD
MG/L P INST MGO MONTHLY
1.200
l.OOOK
1.400
2.300
4.900
10.500
17.500
16.500
24.500
14.250
11.000
4.600
0.410
0.350
0.190
0.590
2.800
5.250
6.400
10.000
8.150
7.100
3.400
0.059
0.340
0.230
0.230
0.170
0.480
1.150
1.750
3.600
3.100
2.100
2.700
0.740
0.460 0.500
0.540
0.420 0.500
0.460 0.500
1.300 0.500
2.900 0.250
4.000 0.300
4.900 0.360
5.325 0.250
3.250
0.200
3.300 0.100
0.500
0.500 0.500
1.400
0.288
0.500
0.500
0.500
0.250
0.300
0.300
0.280
0.250
0.130
0.250
K VttLUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
00630
DATE TIME DEPTH NO3&N03
FROM OF N-TOTAL
TO DAY FEET MG/L
75/11/11 11 00
0.135
00635
TOT KJEL
N
MG/L
5.000
081321 Ab081321 P002000
40 14 55.0 105 49 45.0 4
GRAND LAKE
08 7.5 SHADOrf MT.
D/SHADOri 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
FLOM-MGD
MONTHLY
0.400
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |