Bump-Sullivan Reservoir
Goshen County, Wyoming441 acresView mapDirections
Nutrients and algae run above the regional average.
↑ up from F at the last regrade
- Hypereutrophic
- #3 of 3 in the county
- 23 ft max depth
- Limited data
Bump-Sullivan Reservoir in Goshen County, Wyoming has a water quality grade of D (Nutrient-rich). Water clarity: 0.2 ft visibility. Phosphorus: 420 µg/L. Surface area: 441 acres.
- Clarity
- 0.2 ft
- Max depth
- ~23 ft est.
- Area
- 441 acres
- Type
- Hypereutrophic
- Phosphorus
- 420 µg/L
Stays via Stay22
Stays near Bump-Sullivan Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Bump-Sullivan Reservoir in Goshen 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Bump-Sullivan Reservoir are listed below.
Top-rated places to stay near Bump-Sullivan 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 Bump-Sullivan Reservoir’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Bump-Sullivan Reservoir is a 441-acre highly nutrient-loaded hypereutrophic lake in Goshen County, Wyoming with an estimated average depth of about 23 feet. Water quality is graded D based on 1 sampling years through 2018. Compared to the 2 other monitored lakes in Goshen County, Bump-Sullivan Reservoir ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2018-09-04. 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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 0.2 ft of visibility. Phosphorus 420 µg/L. TSI 94. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.2 ft | Not graded |
| Phosphorus | 420 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 94 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~23 ft est. |
| Average Depth | ~3 ft est. |
| Surface Area | 441 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 Bump-Sullivan 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 Bump-Sullivan Reservoir
Reservoir Info (USACE NID)
Bump-Sullivan Reservoir is a man-made reservoir impounded by the Goshen No. 2 (completed 1924), built primarily for irrigation on the Horse Creek; earth-type dam, 12 ft tall and 1,640 ft long.
- Surface area
- 441 ac
- Normal storage
- 1,929 ac-ft
- Max storage
- 2,063 ac-ft
- Drainage area
- 9.4 sq mi
- Hazard class
- Significant
- Owner
- GOSHEN MUTUAL RESERVOIR & DITCH COMPANY
Source: USACE National Inventory of Dams, NID ID WY02375 · Operator website · Matched by proximity (0.24 km)
County Ranking
Ranked #3 of 3 lakes in Goshen County
Nearby Lakes in Goshen County
Frequently asked questions about Bump-Sullivan Reservoir
Where is Bump-Sullivan Reservoir?
- Bump-Sullivan Reservoir is a lake in Goshen County, Wyoming. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Bump-Sullivan Reservoir?
- Bump-Sullivan Reservoir in Goshen County, Wyoming has a water quality grade of D (Nutrient-rich). Water clarity: 0.2 ft visibility. Phosphorus: 420 µg/L. Surface area: 441 acres.
Is Bump-Sullivan Reservoir safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Bump-Sullivan Reservoir?
- No published bathymetric survey covers Bump-Sullivan Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 23 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 441 acres.
Explore Bump-Sullivan Reservoir across LakeQuality
More Wyoming Lake Rankings
Other Grade D Lakes in Wyoming
Hypereutrophic Lakes in Wyoming
Where this data comes from
6 measurements from 1 monitoring station, 2018. 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 · 2018
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)