Chapman Wm is an earth dam located in Marshall County, Oklahoma, built in 1977. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 542 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Chapman Wm
The primary purpose of Chapman Wm is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by William C Chapman (private). It impounds the Tr. Washita River near Ravcia.
The dam stands 20 feet tall and stretches 542 feet across, and has a maximum storage capacity of 80 acre-feet. Completed in 1977, the structure is 49 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 11/20/2002. That was over 23 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oklahoma |
| County | Marshall |
| Nearest City | Ravcia |
| River/Stream | Tr. Washita River |
| Coordinates | 34.16552, -96.83857 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 542 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 50 acre-ft |
| Max Discharge | 2,325 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | William C Chapman |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/20/2002 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK13177 |
| Federal ID | OK13177 |
| More Info | State Dam Safety Program |