Turtle Lake (lower)
Turtle Lake (lower) is a dam located in Cleveland County, Oklahoma, built in 2003. It carries a High hazard potential classification and has a fair condition assessment.
About Turtle Lake (lower)
Turtle Lake (lower) is a dam in Cleveland, Oklahoma. The dam is owned by Darryl & Pamela K Umphries (private). It impounds the Trib North Fork Little River near Moore.
The dam stands 21 feet tall and stretches 280 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 118 square miles. Completed in 2003, the structure is relatively new.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/04/2020.
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 Oklahoma 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 | Oklahoma |
| County | Cleveland |
| Nearest City | Moore |
| River/Stream | Trib North Fork Little River |
| Coordinates | 35.31437, -97.42868 |
Physical Characteristics
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 280 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Normal Storage | 58 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 118 sq mi |
| Max Discharge | 536 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | DARRYL & PAMELA K UMPHRIES |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/04/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK30153 |
| Federal ID | OK30153 |
| More Info | State Dam Safety Program |