Graham Reservoir
Uinta County, Wyoming26 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.
- Limited data
Graham Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.4 ft visibility. Phosphorus: 17.9 µg/L. Surface area: 26 acres.
- Clarity
- 2.4 ft
- Area
- 26 acres
- Phosphorus
- 17.9 µg/L
- Trend
- ↑ Improving
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Watch Graham Reservoir’s letter
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Why Graham 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 Graham 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.
Graham Reservoir is a 26-acre lake in Uinta County, Wyoming. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2014-09-23. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Graham Reservoir
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.4 ft of visibility. Phosphorus 17.9 µg/L. TSI 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.4 ft | Not graded |
| Phosphorus | 17.9 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 26 acres |
No bathymetric survey has been published for Graham Reservoir, so its depth is not documented here.
Fishing Graham Reservoir
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -21.2 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Graham Reservoir is a man-made reservoir impounded by the Graham (completed 1945), built primarily for irrigation on the Smith'S Fork Creek; earth-type dam, 33 ft tall and 420 ft long.
- Surface area
- 26 ac
- Normal storage
- 221 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Low
- Owner
- BENEDICT ENTERPRISES LLC
Source: USACE National Inventory of Dams, NID ID WY01208 · Operator website
Graded lakes near Graham Reservoir
Graham Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Uinta County
Frequently asked questions about Graham Reservoir
Where is Graham Reservoir?
- Graham 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 Graham Reservoir?
- Graham Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.4 ft visibility. Phosphorus: 17.9 µg/L. Surface area: 26 acres.
Is Graham Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Graham 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.