Graff #1
Graff #1 is an earth dam located in Harper County, Oklahoma, built in 1968. It carries a Low hazard potential classification.
About Graff #1
Graff #1 is a dam in Harper, Oklahoma. The dam is owned by Graff Estate (private). It impounds the Sand Creek near Selman.
The dam stands 20 feet tall and stretches 658 feet across, has a maximum storage capacity of 65 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1968, the structure is well into its service life at over 50 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oklahoma |
| County | Harper |
| Nearest City | Selman |
| River/Stream | Sand Creek |
| Coordinates | 36.69510, -99.51107 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 658 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 65 acre-ft |
| Max Storage | 65 acre-ft |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | GRAFF ESTATE |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK83828 |
| Federal ID | OK83828 |
| More Info | State Dam Safety Program |