Cooper (Chapman) Lake Water Level Today
Texas · Below full pool
- Elevation
- 435.45 ft
- From full pool
- −4.55 ft
- Percent of pool
- 70.7%
- 24-hour change
- −0.04 ft
- 7-day change
- −0.31 ft
- Reading
- Sep 20, 2026 · TWDB
Last year at Cooper (Chapman) Lake
Cooper (Chapman) Lake is 4.55 ft below full pool, at 435.45 ft, down 0.04 ft in the last 24 hours. That puts the lake at 70.7 percent of its conservation pool.
Over the last 7 days the level fell 0.31 ft, and over 30 days it fell 1.28 ft. In the 391 days of readings on this page the high was 439.13 ft on Aug 17, 2025 and the low was 435.08 ft on Feb 13, 2026, a range of 4.05 ft.
The reading is the Texas Water Development Board gauge, taken Sep 20, 2026. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the TWDB page for hourly values.
Cooper (Chapman) Lake pool elevations
| Current elevation | 435.45 ft |
|---|---|
| Full pool (top of conservation) | 440.00 ft |
| Bottom of conservation pool | 415.50 ft |
| Conservation capacity | 258,723 acre-ft |
| Surface area at full pool | 15,278 acres |
| 30-day change | −1.28 ft |
| 1-year high | 439.13 ft (Aug 17, 2025) |
| 1-year low | 435.08 ft (Feb 13, 2026) |
| Operating agency | Texas Water Development Board |
Source: Texas Water Development Board. Read what full pool and flood pool mean.
More lakes in Texas
- Canyon Lake 908.33 ft, −0.67 ft from full
- Lake Travis 675.59 ft, −5.41 ft from full
- Lake Texoma 615.33 ft, −1.17 ft from full
- Medina Lake 1,020.96 ft, −43.24 ft from full
- Lake Buchanan 1,018.51 ft, −1.49 ft from full
- Elephant Butte Lake 4,275.92 ft, −129.67 ft from full
Cooper (Chapman) Lake level questions
What is the water level of Cooper (Chapman) Lake today?
Cooper (Chapman) Lake is at 435.45 ft as of Sep 20, 2026, −4.55 ft relative to full pool (440.00 ft). The 24-hour change is −0.04 ft.
What is full pool at Cooper (Chapman) Lake?
Full pool, the top of the conservation pool, is 440.00 ft. The bottom of the conservation pool is 415.50 ft.
Is Cooper (Chapman) Lake rising or falling?
Over the last 24 hours the level is −0.04 ft; over 7 days it fell 0.31 ft, and over 30 days it fell 1.28 ft.
Where does this Cooper (Chapman) Lake level come from?
From the Texas Water Development Board (TWDB) public data feed for Cooper (Chapman) Lake. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.