Brandy Branch Reservoir
Harrison County, Texas1,242 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Mesotrophic
- #1 of 1 in the county
- 50 ft max depth
- Limited data
Brandy Branch Reservoir in Harrison County, Texas has a water quality grade of A (Excellent). Water clarity: 12 ft visibility. Chlorophyll-a (algae): 3.1 µg/L. Surface area: 1242 acres.
- Clarity
- 12 ft
- Max depth
- ~50 ft est.
- Area
- 1,242 acres
- Type
- Mesotrophic
- Chlorophyll-a
- 3.1 µg/L
- Trend
- → Stable
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Watch Brandy Branch Reservoir’s letter
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Brandy Branch Reservoir is a 1,242-acre mesotrophic lake in Harrison County, Texas with an estimated average depth of about 50 feet. Water quality is graded A based on 1 sampling years through 2024. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2024-09-18. Grade methodology: LakeQuality methodology.
What Brandy Branch Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water12 ft of visibility
- Big water1,242 acres
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 A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Good clarity, visible to about 12 ft. Chlorophyll-a 3.1 µg/L. TSI 42. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 3.1 µg/L | Good |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~50 ft est. |
| Average Depth | ~36 ft est. |
| Surface Area | 1,242 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for Brandy Branch 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.
Fishing Brandy Branch Reservoir
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.15 m/yr | 5 |
| Chlorophyll-a | ↓ Declining | +0.44 µg/L/yr | 5 |
Reservoir Info (USACE NID)
Brandy Branch Reservoir is a man-made reservoir impounded by the Brandy Branch Cooling Pond Dam (completed 1983), built primarily for other on the Brandy Branch; earth-type dam, 80 ft tall and 3,200 ft long.
- Surface area
- 1,242 ac
- Normal storage
- 29,513 ac-ft
- Max storage
- 38,672 ac-ft
- Drainage area
- 4.1 sq mi
- Hazard class
- Significant
- Owner
- AEP UTILITIES WEST
Source: USACE National Inventory of Dams, NID ID TX04833 · Operator website · Matched by proximity (0.44 km)
County Ranking
Ranked #1 of 1 lakes in Harrison County
Nearby Lakes in Harrison County
Frequently asked questions about Brandy Branch Reservoir
Where is Brandy Branch Reservoir?
- Brandy Branch Reservoir is a lake in Harrison County, Texas. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Brandy Branch Reservoir?
- Brandy Branch Reservoir in Harrison County, Texas has a water quality grade of A (Excellent). Water clarity: 12 ft visibility. Chlorophyll-a (algae): 3.1 µg/L. Surface area: 1242 acres.
Is Brandy Branch Reservoir safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Brandy Branch Reservoir?
- No published bathymetric survey covers Brandy Branch Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 50 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 1242 acres.
Explore Brandy Branch Reservoir across LakeQuality
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Where this data comes from
38 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN38 samples · 2020–2024
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)