Lake Alan Henry
Garza County, Texas2,884 acresView mapDirections
TCEQ publishes the water-quality measurements for Lake Alan Henry. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
- 75 ft max depth
- Public access
- Limited data
Lake Alan Henry in Garza County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 9.4 ft visibility. Phosphorus: 91.4 µg/L. Chlorophyll-a (algae): 2.6 µg/L. Surface area: 2884 acres.
Lake Alan Henry is a 2,884-acre mesotrophic lake in Garza County, Texas with an estimated average depth of about 75 feet. Water clarity is improving over recent sampling years. Limited fish-species data available. Public access is available with 6 public boat landings.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2025-11-03. Methodology: how these readings are compared.
Lake Alan Henry covers about 2,900 acres in Garza County. It has 6 public boat landings, so a lakefront rental is not the only way to get a boat on the water. For a place on the water, look through cabin and lake-house rentals near Lake Alan Henry on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Lake Alan Henry is good for
From access and monitoring records, not editorial picks.
- Boat launch6 documented ramps
- Big water2,884 acres
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Lake Alan Henry is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Lake Alan Henry is safe to swim in today is a call for the Texas Commission on Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Alan Henry
These are the measurements TCEQ publishes for Lake Alan Henry, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9.4 ft. Phosphorus 91.4 µg/L. Chlorophyll-a 2.6 µg/L. TSI 51.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 91.4µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 51 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Alan Henry
Answers come straight from the public measurements and survey records on this page.
→ Lake Alan Henry water level: the live USGS gauge reading
Lake Details
Max depth
~75 ft est.
Surface area
2,884 acres
Public access
Yes
Listed by TCEQ
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 Alan Henry.
Lake Size & Watershed
Watershed (drainage) area
993 sq mi
HydroLAKES / HydroSHEDS
Shoreline
24.9 mi
HydroLAKES / HydroSHEDS
Elevation
2,211 ft
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
- Sam Wahl Recreation AreaPublic
- North Ridge Drive - Lake Alan HenryPublic
- Lake Alan HenryPublic
- Lake Alan HenryPublic
- Dam SitePublic
- Oak Canyon EstatesPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Lake Alan Henry
Compare lakeside cabins, hotels, and vacation rentals near Lake Alan Henry in Garza 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 Alan Henry
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Fishing Lake Alan Henry
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+39.73 µg/L/yr2 years
Chlorophyll-a
Stable-0.01 µg/L/yr5 years
Reservoir Info (USACE NID)
Lake Alan Henry is a man-made reservoir impounded by the John T Montford Dam (completed 1994), built primarily for irrigation on the Double Mountain Fork Brazos R; earth-type dam, 141 ft tall and 4,150 ft long.
- Surface area
- 2,884 ac
- Normal storage
- 115,937 ac-ft
- Max storage
- 354,500 ac-ft
- Drainage area
- 394 sq mi
- Hazard class
- High
- Owner
- CITY OF LUBBOCK
All listed purposes: Irrigation;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID TX06464 · Operator website · Matched by proximity (0.46 km)
EPA Impairment Status
Lake Alan Henry is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit TX-1241B_01 · Official waterbody report
Nearby Lakes in Garza County
Frequently asked questions about Lake Alan Henry
Where is Lake Alan Henry?
- Lake Alan Henry is a lake in Garza County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of Lake Alan Henry?
- Lake Alan Henry in Garza County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 9.4 ft visibility. Phosphorus: 91.4 µg/L. Chlorophyll-a (algae): 2.6 µg/L. Surface area: 2884 acres.
Is Lake Alan Henry safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Alan Henry is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Lake Alan Henry?
- No published bathymetric survey covers Lake Alan Henry, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 75 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 2884 acres.
Are there boat ramps on Lake Alan Henry?
- Lake Alan Henry has 6 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Sam Wahl Recreation Area, North Ridge Drive - Lake Alan Henry, Lake Alan Henry, Lake Alan Henry, among others. Public access is listed as yes.
Can I fish at Lake Alan Henry?
- Lake Alan Henry has 6 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Texas's fish and wildlife agency, so check its current regulations before you go.
Explore Lake Alan Henry across LakeQuality
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Where this data comes from
34 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN34 samples · 2020–2025
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory