Lower North Crow Reservoir
Laramie County, WyomingView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- #3 of 8 in the county
- Limited data
Lower North Crow Reservoir in Laramie County, Wyoming has a water quality grade of B (Good). Water clarity: 9.4 ft visibility. Phosphorus: 20 µg/L.
- Clarity
- 9.4 ft
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
Stays via Stay22
Stays near Lower North Crow Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Lower North Crow Reservoir in Laramie County, Wyoming — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Lower North Crow Reservoir
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wyoming’s top lakes →
Watch Lower North Crow Reservoir’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Lower North Crow Reservoir is a 0-acre mesotrophic lake in Laramie County, Wyoming. Water quality is graded B based on 1 sampling years through 2020. Compared to the 7 other monitored lakes in Laramie County, Lower North Crow Reservoir ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2020-09-15. 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)
Moderate clarity, visible to about 9.4 ft. Phosphorus 20 µg/L. TSI 46. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.4 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Lower North Crow Reservoir
Reservoir Info (USACE NID)
Lower North Crow Reservoir is a man-made reservoir impounded by the North Crow Diversion (completed 1910), built primarily for water supply on the North Fork of Crow Creek; arch-type dam, 46 ft tall and 146 ft long.
- Surface area
- 0 ac
- Normal storage
- 75 ac-ft
- Max storage
- 4,000 ac-ft
- Drainage area
- 28.2 sq mi
- Hazard class
- Significant
- Owner
- CITY OF CHEYENNE-CBPU
Source: USACE National Inventory of Dams, NID ID WY01315 · Operator website · Matched by proximity (0.06 km)
County Ranking
Ranked #3 of 8 lakes in Laramie County
Nearby Lakes in Laramie County
Frequently asked questions about Lower North Crow Reservoir
Where is Lower North Crow Reservoir?
- Lower 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 Lower North Crow Reservoir?
- Lower North Crow Reservoir in Laramie County, Wyoming has a water quality grade of B (Good). Water clarity: 9.4 ft visibility. Phosphorus: 20 µg/L.
Is Lower North Crow Reservoir safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Lower North Crow Reservoir across LakeQuality
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Mesotrophic Lakes in Wyoming
Where this data comes from
6 measurements from 1 monitoring station, 2020. 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_WATERSHED6 samples · 2020
Analytical methods
- Secchi
- 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.