Alex Branch Lake
Sequatchie County, Tennessee18 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.
- Limited data
Alex Branch Lake in Sequatchie County, Tennessee is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 18 acres.
- Area
- 18 acres
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Watch Alex Branch Lake’s letter
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Why Alex Branch Lake 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 Alex Branch Lake, 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 TDEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Alex Branch Lake is a 18-acre lake in Sequatchie County, Tennessee.
Source: EPA Water Quality Portal sampling records, TDEC, last sampled 2019-10-08. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Alex Branch Lake
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 |
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 18 acres |
No bathymetric survey has been published for Alex Branch Lake, so its depth is not documented here.
Fishing Alex Branch Lake
Reservoir Info (USACE NID)
Alex Branch Lake is a man-made reservoir impounded by the Brier Branch Dam (completed 1989) on the Alex Branch; earth-type dam, 26 ft tall and 400 ft long.
- Surface area
- 18 ac
- Normal storage
- 126 ac-ft
- Max storage
- 246 ac-ft
- Drainage area
- 0.69 sq mi
- Hazard class
- Low
- Owner
- Brier Branch HOA
Source: USACE National Inventory of Dams, NID ID TN15307 · Operator website · Matched by proximity (0.29 km)
Graded lakes near Alex Branch Lake
Alex Branch Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Sequatchie County
Frequently asked questions about Alex Branch Lake
Where is Alex Branch Lake?
- Alex Branch Lake is a lake in Sequatchie County, Tennessee. 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 Alex Branch Lake?
- Alex Branch Lake in Sequatchie County, Tennessee is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 18 acres.
Is Alex Branch Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Alex Branch Lake across LakeQuality
2 documented falls within 24.3 mi, nearest Fall Creek Falls
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Where this data comes from
1 measurement from 1 monitoring station, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- TDEC Division of Water Resources
TDECWR_WQX1 sample · 2019
Analytical methods
- Phosphorus by Colorimetry
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.