Dd No B-1 is an earth dam located in Gray County, Kansas, built in 1961. It carries a High hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 27 ft27 ft tall and 1,600 ft long, taller than 59% 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-1
The primary purpose of Dd No B-1 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 Arkansas River-tr near Cimarron.
The dam stands 27 feet tall and stretches 1,600 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 599 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 03/19/2020.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Kansas dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Kansas |
| County | Gray |
| Nearest City | Cimarron |
| River/Stream | Arkansas River-tr |
| Coordinates | 37.81035, -100.36040 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 1,600 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 599 acre-ft |
| Max Storage | 599 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 6,804 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Pawnee Wjd No 81 |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 03/19/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS02276 |
| Federal ID | KS02276 |
| More Info | State Dam Safety Program |