Dd No 1-20 is an earth dam located in Pawnee County, Kansas, built in 1984. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 2,694 ft long, taller than 62% 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 1-20
The primary purpose of Dd No 1-20 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 Pawnee Wjd No 81 (local government). It impounds the Sawmill Creek near Larned.
The dam stands 28 feet tall and stretches 2,694 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 4,230 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1984, the structure is 42 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 | Pawnee |
| Nearest City | Larned |
| River/Stream | Sawmill Creek |
| Coordinates | 38.12287, -99.54065 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 2,694 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 4,230 acre-ft |
| Max Storage | 4,230 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 16 sq mi |
| Max Discharge | 4,377 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Pawnee Wjd No 81 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KS05448 |
| Federal ID | KS05448 |
| More Info | State Dam Safety Program |