Upper North Crow Reservoir
Laramie County, Wyoming94 acresView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- #5 of 8 in the county
- 20 ft max depth
- Limited data
Upper North Crow Reservoir in Laramie County, Wyoming has a water quality grade of B (Good). Phosphorus: 20 µg/L. Surface area: 94 acres.
- Max depth
- ~20 ft est.
- Area
- 94 acres
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
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Watch Upper North Crow Reservoir’s letter
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Upper North Crow Reservoir is a 94-acre mesotrophic lake in Laramie County, Wyoming with an estimated average depth of about 20 feet. Water quality is graded B based on 1 sampling years through 2017. 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. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
No clarity data. Phosphorus 20 µg/L. TSI 47. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~20 ft est. |
| Average Depth | ~14 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
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.
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)
County Ranking
Ranked #5 of 8 lakes in Laramie County
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. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Upper North Crow Reservoir?
- Upper North Crow Reservoir in Laramie County, Wyoming has a water quality grade of B (Good). Phosphorus: 20 µg/L. Surface area: 94 acres.
Is Upper North Crow Reservoir safe to swim in?
- The B is nutrients and algae, 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.
Explore Upper North Crow Reservoir across LakeQuality
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Mesotrophic Lakes in Wyoming
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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)