Lake J B Thomas
Scurry County, Texas7,820 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.
- 64 ft max depth
- Public access
- Limited data
Lake J B Thomas in Scurry County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 7820 acres.
- Max depth
- ~64 ft est.
- Area
- 7,820 acres
- Public access
- Yes
Stays via Stay22
Stays near Lake J B Thomas
Compare lakeside cabins, hotels, and vacation rentals near Lake J B Thomas in Scurry County, Texas — 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 Lake J B Thomas
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip? Cabins and lodging at Lake J B Thomas → · more Texas lake trips
Watch Lake J B Thomas’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Lake J B Thomas 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 Lake J B Thomas, 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.
Lake J B Thomas is a 7,820-acre lake in Scurry County, Texas with an estimated average depth of about 64 feet. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2020-10-13. Grade methodology: LakeQuality methodology.
What Lake J B Thomas is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Big water7,820 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lake J B Thomas
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, 3:45 PM from gauge 08118000 (Lk J. B. Thomas nr Vincent, TX). Station page ↗ — a live reading replaces this snapshot when the gauge responds. Missing live data is not an all-clear.
→ Lake J B Thomas water level: the live USGS gauge reading
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~64 ft est. |
| Average Depth | ~37 ft est. |
| Surface Area | 7,820 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 Lake J B Thomas.
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
- Lake J. B. ThomasPublic
- Bull Creek ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake J B Thomas
Reservoir Info (USACE NID)
Lake J B Thomas is a man-made reservoir impounded by the Lake Jb Thomas Dam (completed 1952), built primarily for water supply on the Colorado River; earth-type dam, 105 ft tall and 9,200 ft long.
- Surface area
- 7,820 ac
- Normal storage
- 200,604 ac-ft
- Max storage
- 430,600 ac-ft
- Drainage area
- 997 sq mi
- Hazard class
- High
- Owner
- COLORADO RIVER MUNICIPAL WATER DISTRICT
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID TX04138 · Operator website
Graded lakes near Lake J B Thomas
Lake J B Thomas has no grade, but these lakes within a short drive do.
Nearby Lakes in Scurry County
Frequently asked questions about Lake J B Thomas
Where is Lake J B Thomas?
- Lake J B Thomas is a lake in Scurry 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 Lake J B Thomas?
- Lake J B Thomas in Scurry County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 7820 acres.
Is Lake J B Thomas safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Lake J B Thomas?
- No published bathymetric survey covers Lake J B Thomas, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 64 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 7820 acres.
What is the water level at Lake J B Thomas?
- The USGS snapshot on this page for Lake J B Thomas is 2226.8 ft of water-surface elevation, recorded Sep 7, 2026, 3:45 PM at gauge 08118000. 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 Lake J B Thomas?
- Lake J B Thomas has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Lake J. B. Thomas, Bull Creek Park. Public access is listed as yes.
Explore Lake J B Thomas across LakeQuality
More Texas Lake Rankings
Other Lakes in Texas
Where this data comes from
5 measurements from 2 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Texas Water Science Center
USGS-TX5 samples · 2020
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory