O C Fisher Reservoir
Tom Green County, Texas5,400 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.
- 107 ft max depth
- Public access
- Limited data
O C Fisher Reservoir in Tom Green County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 5400 acres.
- Max depth
- ~107 ft est.
- Area
- 5,400 acres
- Public access
- Yes
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Watch O C Fisher Reservoir’s letter
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Why O C Fisher 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 O C Fisher Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
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 TCEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
O C Fisher Reservoir is a 5,400-acre lake in Tom Green County, Texas with an estimated average depth of about 107 feet. Limited fish-species data available. Public access is available with 6 public boat landings.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2021-10-18. Grade methodology: LakeQuality methodology.
What O C Fisher Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch6 documented ramps
- Big water5,400 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for O C Fisher Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Current Conditions
USGS snapshot Sep 7, 2026, 3:00 PM from gauge 08134500 (O. C. Fisher Lk at San Angelo, TX). Station page ↗ — a live reading replaces this snapshot when the gauge responds. Missing live data is not an all-clear.
→ O C Fisher Reservoir water level: the live USGS gauge reading
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~107 ft est. |
| Average Depth | ~97 ft est. |
| Surface Area | 5,400 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for O C Fisher 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
- W 19th Street BridgePublic
- Isabel Harte CampgroundPublic
- Red Arroyo CampgroundPublic
- Flinstone VillagePublic
- North Concho River - Tom Green CountyPublic
- North Concho River - Tom Green CountyPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing O C Fisher Reservoir
Reservoir Info (USACE NID)
O C Fisher Reservoir is a man-made reservoir impounded by the O.C. Fisher Dam (completed 1952), built primarily for flood risk reduction on the Concho River; earth-type dam, 130 ft tall and 40,885 ft long.
- Surface area
- 5,400 ac
- Normal storage
- 115,700 ac-ft
- Max storage
- 766,000 ac-ft
- Drainage area
- 1,511 sq mi
- Hazard class
- High
- Owner
- USACE - Fort Worth District
All listed purposes: Flood Risk Reduction;Fish and Wildlife Pond;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID TX00012 · Operator website
Graded lakes near O C Fisher Reservoir
O C Fisher Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Tom Green County
Frequently asked questions about O C Fisher Reservoir
Where is O C Fisher Reservoir?
- O C Fisher Reservoir is a lake in Tom Green County, Texas. 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 O C Fisher Reservoir?
- O C Fisher Reservoir in Tom Green County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 5400 acres.
Is O C Fisher Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is O C Fisher Reservoir?
- No published bathymetric survey covers O C Fisher Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 107 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 5400 acres.
What is the water level at O C Fisher Reservoir?
- The USGS snapshot on this page for O C Fisher Reservoir is 1872.92 ft of water-surface elevation, recorded Sep 7, 2026, 3:00 PM at gauge 08134500. Current Conditions hydrates a live NWIS reading from that same station when the gauge responds. A missed live fetch is not an all-clear.
Are there boat ramps on O C Fisher Reservoir?
- O C Fisher Reservoir has 6 documented boat landings in the USGS National Boat Ramps inventory. Named access points include W 19th Street Bridge, Isabel Harte Campground, Red Arroyo Campground, Flinstone Village, among others. Public access is listed as yes.
Explore O C Fisher Reservoir across LakeQuality
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Where this data comes from
6 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN6 samples · 2020–2021
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