Griswold No. 1
Low HazardPoor ConditionEmergency Action Plan: Not Required
Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | EDGEMONT, SD |
| River/Stream | GRISWOLD DRAW |
| Coordinates | 43.21278, -104.15694 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 645 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 133 acre-ft |
| Max Storage | 133 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 9 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | TETRAD CORPORATION |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/28/2023 |
| Emergency Action Plan | Not Required |