Upper North Crow Reservoir
Laramie County, Wyoming94 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Upper North Crow Reservoir. Here is what has been measured.
- Mesotrophic
- 20 ft max depth
- Limited data
Upper North Crow Reservoir in Laramie County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 20 µg/L. Surface area: 94 acres.
Upper North Crow Reservoir is a 94-acre mesotrophic lake in Laramie County, Wyoming with an estimated average depth of about 20 feet. Compared to the 7 other monitored lakes in Laramie County, Upper North Crow Reservoir ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2017-09-19. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Upper North Crow Reservoir is safe to swim in today is a call for the Wyoming Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Upper North Crow Reservoir
These are the measurements Wyoming DEQ publishes for Upper North Crow Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 20 µg/L. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 20µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Upper North Crow Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~20 ft est.
Surface area
94 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wyoming has not published bathymetry for Upper North Crow Reservoir.
Lake Size & Watershed
Watershed (drainage) area
19 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.5 mi
HydroLAKES / HydroSHEDS
Elevation
7,500 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Fishing Upper North Crow Reservoir
Reservoir Info (USACE NID)
Upper North Crow Reservoir is a man-made reservoir impounded by the Upper Van Tassell (completed 1932), built primarily for water supply on the North Crow Creek; earth-type dam, 98 ft tall and 680 ft long.
- Surface area
- 94 ac
- Normal storage
- 2,736 ac-ft
- Max storage
- 3,816 ac-ft
- Drainage area
- 18.7 sq mi
- Hazard class
- High
- Owner
- CITY OF CHEYENNE-BOPU
Source: USACE National Inventory of Dams, NID ID WY00007 · Operator website · Matched by proximity (0.09 km)
Nearby Lakes in Laramie County
Frequently asked questions about Upper North Crow Reservoir
Where is Upper North Crow Reservoir?
- Upper North Crow Reservoir is a lake in Laramie County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Upper North Crow Reservoir?
- Upper North Crow Reservoir in Laramie County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 20 µg/L. Surface area: 94 acres.
Is Upper North Crow Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Upper North Crow Reservoir?
- No published bathymetric survey covers Upper North Crow Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 20 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 94 acres.
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Where this data comes from
3 measurements from 1 monitoring station, 2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED3 samples · 2017
Analytical methods
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)