Cooper Dam
Dam in Delta County, Texas · Sulphur River · forms Jim Chapman Lake
Height
95 ft
29 m (NID height)
Length
28,072 ft
8,556 m
Completed
1991
Jim Chapman Lake today
434.42 ft
7 days ▼ 0.36 ft
vs full pool
▼ 5.58 ft
Normal storage
310,800 acre-ft
Normal for the date
Reservoir level measured Oct 23, 2026, 10:00 AM CDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Fish and Wildlife Pond; Recreation; Water Supply
- Dam type
- Earth
- Structural height
- 95 ft
- Owner
- USACE - Fort Worth District (Federal)
- Maximum storage
- 797,300 acre-ft
- Surface area
- 19,280 acres
- Hydraulic height
- 74 ft
- Drainage area
- 476 sq mi
- Spillway
- Uncontrolled, 700 ft wide
- Army Corps district
- Fort Worth District
- Also known as
- Jim Chapman Lake
- NID ID
- TX08012
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 21, 2026. Search NID ID TX08012 at nid.sec.usace.army.mil. Project website.