Woodruff Narrows Reservoir
Uinta County, Wyoming2,312 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- 128 ft max depth
- Public access
- Limited data
Woodruff Narrows Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.9 ft visibility. Phosphorus: 92 µg/L. Surface area: 2312 acres.
- Clarity
- 0.9 ft
- Max depth
- ~128 ft est.
- Area
- 2,312 acres
- Phosphorus
- 92 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Woodruff Narrows Reservoir’s letter
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Why Woodruff Narrows Reservoir has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Woodruff Narrows Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Woodruff Narrows Reservoir is a 2,312-acre lake in Uinta County, Wyoming with an estimated average depth of about 128 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2014-09-23. Grade methodology: LakeQuality methodology.
What Woodruff Narrows Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water2,312 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Woodruff Narrows Reservoir
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 0.9 ft of visibility. Phosphorus 92 µg/L. TSI 74.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.9 ft | Not graded |
| Phosphorus | 92 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 74 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~128 ft est. |
| Average Depth | ~27 ft est. |
| Surface Area | 2,312 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 Woodruff Narrows 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.
Recreation & Access
- Woodruff Narrows ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Woodruff Narrows Reservoir
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -64.4 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Woodruff Narrows Reservoir is a man-made reservoir impounded by the Woodruff Narrows (completed 1962), built primarily for irrigation on the Bear River; earth-type dam, 68 ft tall and 620 ft long.
- Surface area
- 2,312 ac
- Normal storage
- 57,300 ac-ft
- Max storage
- 102,000 ac-ft
- Drainage area
- 870 sq mi
- Hazard class
- High
- Owner
- WOODRUFF NARROWS RESERVOIR ASSOCIATION
Source: USACE National Inventory of Dams, NID ID WY01197 · Operator website
Graded lakes near Woodruff Narrows Reservoir
Woodruff Narrows Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Uinta County
Frequently asked questions about Woodruff Narrows Reservoir
Where is Woodruff Narrows Reservoir?
- Woodruff Narrows Reservoir is a lake in Uinta County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Woodruff Narrows Reservoir?
- Woodruff Narrows Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.9 ft visibility. Phosphorus: 92 µg/L. Surface area: 2312 acres.
Is Woodruff Narrows Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Woodruff Narrows Reservoir?
- No published bathymetric survey covers Woodruff Narrows Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 128 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 2312 acres.
Are there boat ramps on Woodruff Narrows Reservoir?
- Woodruff Narrows Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Woodruff Narrows Reservoir. Public access is listed as yes.
Explore Woodruff Narrows Reservoir across LakeQuality
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Where this data comes from
7 measurements from 1 monitoring station, 2013–2014. 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_WATERSHED7 samples · 2013–2014
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)
Named boat-access points from the USGS National Boat Ramps inventory