Dd No B-40 (straffus) is an earth dam located in Atchison County, Kansas, built in 1980. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 670 ft long, taller than 68% of U.S. dams with a recorded height. 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 Dd No B-40 (straffus)
The primary purpose of Dd No B-40 (straffus) 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 Delaware Wjd No 10 (local government). It impounds the Coal Creek-tr near Valley Falls.
The dam stands 30 feet tall and stretches 670 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 125 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1980, the structure is 46 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.
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Location
| State | Kansas |
| County | Atchison |
| Nearest City | Valley Falls |
| River/Stream | Coal Creek-tr |
| Coordinates | 39.50098, -95.47760 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 670 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Max Storage | 125 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Delaware Wjd No 10 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KS07012 |
| Federal ID | KS07012 |
| More Info | State Dam Safety Program |