Lake Riley
Lake Riley is a gravity dam located in Hennepin County, Minnesota, built in 1958. It carries a Undetermined hazard potential classification and has a satisfactory condition assessment.
About Lake Riley
The primary purpose of Lake Riley is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mndnr (state). It impounds the Riley Creek near Eden Prairie.
The dam stands 9 feet tall and stretches 20 feet across, creates a reservoir covering 296 acres, has a maximum storage capacity of 3,900 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1958, the structure is well into its service life at over 50 years old.
Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 12/08/2015. That was over 10 years ago.
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Location
| State | Minnesota |
| County | Hennepin |
| Nearest City | Eden Prairie |
| River/Stream | Riley Creek |
| Coordinates | 44.83134, -93.51761 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 9 ft |
| Dam Height | 5 ft |
| Dam Length | 20 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 3,900 acre-ft |
| Max Storage | 3,900 acre-ft |
| Normal Storage | 3,000 acre-ft |
| Surface Area | 296 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 350 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | MNDNR |
| Owner Type | State |
| Hazard Classification | Undetermined |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/08/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00411 |
| Federal ID | MN00411 |
| More Info | State Dam Safety Program |