Porcupine
Low HazardPoor ConditionEmergency Action Plan: Not Required
Location
| State | Wyoming |
| County | Converse |
| Nearest City | EDGEMONT, SD |
| River/Stream | PORCUPINE CREEK |
| Coordinates | 43.49444, -105.24972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 1,450 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 865 acre-ft |
| Max Storage | 865 acre-ft |
| Normal Storage | 590 acre-ft |
| Surface Area | 70 acres |
| Max Discharge | 390 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | POWDER RIVER COAL CO. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/27/2023 |
| Emergency Action Plan | Not Required |