Red Fleet Reservoir
Uintah County, Utah521 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Oligotrophic
- Impaired · Oxygen depletion (low DO)
- #3 of 14 in the county
- Public access
Red Fleet Reservoir in Uintah County, Utah has a water quality grade of A (Excellent). Water clarity: 5.9 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 1.8 µg/L. Surface area: 521 acres.
- Clarity
- 5.9 ft
- Area
- 521 acres
- Type
- Oligotrophic
- Phosphorus
- 20 µg/L
- Chlorophyll-a
- 1.8 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Red Fleet Reservoir’s letter
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Red Fleet Reservoir is a 521-acre cold, clear oligotrophic lake in Uintah County, Utah. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 13 other monitored lakes in Uintah County, Red Fleet Reservoir ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2025-09-04. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLow algae
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 A is nutrients and algae, not a swimming clearance. Red Fleet Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), temperature. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Murky, only visible to about 5.9 ft. Phosphorus 20 µg/L. Chlorophyll-a 1.8 µg/L. TSI 45. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.9 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | 1.8 µg/L | Good |
| Trophic State Index (TSI) | 45 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 521 acres |
| Public Access | Yes |
No bathymetric survey has been published for Red Fleet Reservoir, so its depth is not documented here.
Fishing Red Fleet Reservoir
Water Quality Trend: ↓ Declining
Based on 14 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.001 m/yr | 14 |
| Phosphorus | ↓ Declining | +0.92 µg/L/yr | 6 |
| Chlorophyll-a | → Stable | -0.03 µg/L/yr | 11 |
Reservoir Info (USACE NID)
Red Fleet Reservoir is a man-made reservoir impounded by the Red Fleet Dam (completed 1980), built primarily for fish and wildlife pond on the Big Brush Creek; earth-type dam, 161 ft tall and 1,750 ft long.
- Surface area
- 521 ac
- Normal storage
- 26,000 ac-ft
- Max storage
- 26,000 ac-ft
- Drainage area
- 94.39 sq mi
- Hazard class
- High
- Owner
- BUREAU OF RECLAMATION
All listed purposes: Fish and Wildlife Pond;Irrigation;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID UT82901 · Operator website
EPA Impairment Status
Red Fleet Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit UT-L-14060010-008_00 · Official waterbody report
County Ranking
Ranked #3 of 14 lakes in Uintah County
Nearby Lakes in Uintah County
Frequently asked questions about Red Fleet Reservoir
Where is Red Fleet Reservoir?
- Red Fleet Reservoir is a lake in Uintah County, Utah. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Red Fleet Reservoir?
- Red Fleet Reservoir in Uintah County, Utah has a water quality grade of A (Excellent). Water clarity: 5.9 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 1.8 µg/L. Surface area: 521 acres.
Is Red Fleet Reservoir safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Red Fleet Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), temperature. Check local advisories before you swim.
Explore Red Fleet Reservoir across LakeQuality
13.5 mi away · recorded at 86°F
Species activity outlook by water temperature and season
Where to stay at Utah's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
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Planning a trip around Dinosaur?
Red Fleet Reservoir is about 27 miles from Dinosaur National Monument. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Dinosaur →More Utah Lake Rankings
Other Grade A Lakes in Utah
Oligotrophic Lakes in Utah
Where this data comes from
1,116 measurements from 2 monitoring stations, 2012–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX1,116 samples · 2012–2025
Analytical methods
- Field Measurements
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- Metals in Water by ICP-AES
- Phosphorus by Colorimetry
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
- 10200 H ~ Chlorophyll a-b-c Determination
- Turbidiy determined in the field
- Turbidity by Nephelometry
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
Impairment status from EPA ATTAINS 303(d) database