Big Beaver Reservoir
Big Beaver Reservoir in Rio Blanco County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 205 acres.
- Area
- 205 acres
- Public access
- Yes
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Why Big Beaver 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 Big Beaver Reservoir, no water-quality sampling on record for this lake.
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 CDPHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Big Beaver Reservoir is a 205-acre lake in Rio Blanco County, Colorado. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Big Beaver Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Big Beaver Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Big Beaver Reservoir in Rio Blanco County, Colorado — 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.
Top-rated places to stay near Big Beaver Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 205 acres |
| Public Access | Yes |
No bathymetric survey has been published for Big Beaver Reservoir, so its depth is not documented here.
Recreation & Access
- Oak Ridge State Wildlife AreaPublic
- Oak Ridge State Wildlife AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Big Beaver Reservoir
Nearby Lakes in Rio Blanco County
Frequently asked questions about Big Beaver Reservoir
Where is Big Beaver Reservoir?
- Big Beaver Reservoir is a lake in Rio Blanco County, Colorado. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Big Beaver Reservoir?
- Big Beaver Reservoir in Rio Blanco County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 205 acres.
Is Big Beaver Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Big Beaver Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Big Beaver Reservoir?
- Big Beaver Reservoir has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Oak Ridge State Wildlife Area, Oak Ridge State Wildlife Area. Public access is listed as yes.
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Where this data comes from
Measurements for Big Beaver Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory