Dd No 20 is an earth dam located in Lyon County, Kansas, built in 2001. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 1,555 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 Dd No 20
The primary purpose of Dd No 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 Allen Creek Wd No 89 (local government). It impounds the Dow Creek.
The dam stands 23 feet tall and stretches 1,555 feet across, creates a reservoir covering 19 acres, and has a maximum storage capacity of 661 acre-feet. Completed in 2001, the structure is relatively new.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/27/2012. That was over 14 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Kansas |
| County | Lyon |
| River/Stream | Dow Creek |
| Coordinates | 38.59504, -96.16005 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 1,555 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 661 acre-ft |
| Max Storage | 661 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 19 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Allen Creek Wd No 89 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/27/2012 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS07913 |
| Federal ID | KS07913 |
| More Info | State Dam Safety Program |