Johnson No. 1
Low HazardPoor ConditionEmergency Action Plan: Not Required
Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | EDGEMONT, SD |
| River/Stream | HANCOCK DRAW |
| Coordinates | 43.23710, -104.48200 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 460 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 333 acre-ft |
| Max Storage | 333 acre-ft |
| Normal Storage | 239 acre-ft |
| Surface Area | 40 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | CROSS A RANCH LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/29/2022 |
| Emergency Action Plan | Not Required |