Twin Lakes No. 1
High Hazard ConditionEmergency Action Plan: Yes
Location
| State | Wyoming |
| County | Sheridan |
| Nearest City | SHERIDAN |
| River/Stream | CONEY CREEK |
| Coordinates | 44.60960, -107.31320 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 91 ft |
| Dam Height | 84 ft |
| Dam Length | 1,835 ft |
| Year Completed | 1998 (28 years old) |
Storage & Hydraulics
| NID Storage | 4,041 acre-ft |
| Max Storage | 4,041 acre-ft |
| Normal Storage | 3,411 acre-ft |
| Surface Area | 81 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 13,540 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF SHERIDAN - TOM MANOLIS |
| Owner Type | Local Government |
| Hazard Classification | High |
| Last Inspection | 08/20/2025 |
| Emergency Action Plan | Yes |