Lake Hattie
Albany County, Wyoming3,032 acresView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- #3 of 5 in the county
- 95 ft max depth
- Public access
- Limited data
Lake Hattie in Albany County, Wyoming has a water quality grade of B (Good). Water clarity: 8.4 ft visibility. Phosphorus: 10 µg/L. Surface area: 3032 acres.
- Clarity
- 8.4 ft
- Max depth
- ~95 ft est.
- Area
- 3,032 acres
- Type
- Mesotrophic
- Phosphorus
- 10 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Lake Hattie’s letter
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Lake Hattie is a 3,032-acre mesotrophic lake in Albany County, Wyoming with an estimated average depth of about 95 feet. Water quality is graded B based on 1 sampling years through 2020. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 4 other monitored lakes in Albany County, Lake Hattie ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2020-09-17. Grade methodology: LakeQuality methodology.
What Lake Hattie is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water3,032 acres
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 8.4 ft. Phosphorus 10 µg/L. TSI 42. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.4 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~95 ft est. |
| Average Depth | ~68 ft est. |
| Surface Area | 3,032 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wyoming has not published bathymetry for Lake Hattie.
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.
Recreation & Access
- Lake HattiePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Hattie
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1.17 m/yr | 2 |
| Phosphorus | → Stable | 0 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Lake Hattie is a man-made reservoir impounded by the Lake Hattie (completed 1912), built primarily for irrigation on the Laramie River Offstream; earth-type dam, 43 ft tall and 1,480 ft long.
- Surface area
- 3,032 ac
- Normal storage
- 65,260 ac-ft
- Max storage
- 130,182 ac-ft
- Drainage area
- 31.6 sq mi
- Hazard class
- Significant
- Owner
- PIONEER CANAL-LAKE HATTIE IRRIGATION DISTRICT
Source: USACE National Inventory of Dams, NID ID WY00015 · Operator website
County Ranking
Ranked #3 of 5 lakes in Albany County
Nearby Lakes in Albany County
Frequently asked questions about Lake Hattie
Where is Lake Hattie?
- Lake Hattie is a lake in Albany County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Hattie?
- Lake Hattie in Albany County, Wyoming has a water quality grade of B (Good). Water clarity: 8.4 ft visibility. Phosphorus: 10 µg/L. Surface area: 3032 acres.
Is Lake Hattie safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Lake Hattie?
- No published bathymetric survey covers Lake Hattie, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 95 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 3032 acres.
Are there boat ramps on Lake Hattie?
- Lake Hattie has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Hattie. Public access is listed as yes.
Explore Lake Hattie across LakeQuality
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Mesotrophic Lakes in Wyoming
Where this data comes from
24 measurements from 2 monitoring stations, 2019–2020. 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_WATERSHED24 samples · 2019–2020
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (2)
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)
Named boat-access points from the USGS National Boat Ramps inventory