Oaks Park Reservoir
Uintah County, UtahView mapDirections
Nutrients and algae sit mid-range for this region.
- Mesotrophic
- #11 of 14 in the county
- 24 ft max depth
- Limited data
Oaks Park Reservoir in Uintah County, Utah has a water quality grade of C (Fair). Water clarity: 3.3 ft visibility. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 2.5 µg/L.
- Clarity
- 3.3 ft
- Max depth
- ~24 ft est.
- Type
- Mesotrophic
- Phosphorus
- 20.5 µg/L
- Chlorophyll-a
- 2.5 µg/L
- Trend
- ↑ Improving
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Watch Oaks Park Reservoir’s letter
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Oaks Park Reservoir is a mesotrophic lake in Uintah County, Utah with an estimated average depth of about 24 feet. Water quality is graded C based on 2 sampling years through 2023. Overall water quality is improving over recent sampling years. Compared to the 13 other monitored lakes in Uintah County, Oaks Park Reservoir ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2023-09-06. Grade methodology: LakeQuality methodology.
What Oaks Park Reservoir is good for
From access and monitoring records, not editorial picks.
- Camping2 public campgrounds nearby
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 C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Very murky, less than 3.3 ft of visibility. Phosphorus 20.5 µg/L. Chlorophyll-a 2.5 µg/L. TSI 49. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | Not graded |
| Phosphorus | 20.5 µg/L | Good |
| Chlorophyll-a (Algae) | 2.5 µg/L | Fair |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~24 ft est. |
| Average Depth | ~24 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Utah has not published bathymetry for Oaks Park 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
Public campgrounds near Oaks Park Reservoir
- Oaks Park0.5 km
- Kaler Hollow4.8 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Oaks Park Reservoir
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.05 m/yr | 2 |
Reservoir Info (USACE NID)
Oaks Park Reservoir is a man-made reservoir impounded by the Oaks Park (completed 1938), built primarily for irrigation on the Big Brush Creek; earth-type dam, 56 ft tall and 1,108 ft long.
- Normal storage
- 6,170 ac-ft
- Max storage
- 9,080 ac-ft
- Drainage area
- 11.9 sq mi
- Hazard class
- High
- Owner
- ASHLEY VALLEY RESERVOIR COMPANY
Source: USACE National Inventory of Dams, NID ID UT00234 · Operator website
County Ranking
Ranked #11 of 14 lakes in Uintah County
Nearby Lakes With Higher Grades
Oaks Park Reservoir holds Grade C. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Uintah County
Frequently asked questions about Oaks Park Reservoir
Where is Oaks Park Reservoir?
- Oaks Park Reservoir is a lake in Uintah County, Utah. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Oaks Park Reservoir?
- Oaks Park Reservoir in Uintah County, Utah has a water quality grade of C (Fair). Water clarity: 3.3 ft visibility. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 2.5 µg/L.
Is Oaks Park Reservoir safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Oaks Park Reservoir?
- No published bathymetric survey covers Oaks Park Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 24 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there campgrounds on Oaks Park Reservoir?
- Oaks Park Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including Oaks Park, Kaler Hollow. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Oaks Park Reservoir across LakeQuality
Planning a trip around Dinosaur?
Oaks Park Reservoir is about 40 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 C Lakes in Utah
Mesotrophic Lakes in Utah
Where this data comes from
24 measurements from 1 monitoring station, 2017–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX24 samples · 2017–2023
Analytical methods
- Field Measurements
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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)
Public campgrounds from USGS The National Map Structures, within about 3 miles