Guernsey Dam
Dam in Platte County, Wyoming · North Platte River · forms Guernsey Reservoir
Height
137 ft
42 m (NID height)
Length
560 ft
171 m
Completed
1927
Guernsey Reservoir today
4,396.63 ft
7 days ▲ 0.60 ft
Normal storage
45,612 acre-ft
Reservoir level measured Oct 21, 2026, 12:00 AM MDT. Full level page →
Facts
- Purposes
- Hydroelectric; Irrigation
- Dam type
- Earth
- Structural height
- 137 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 45,612 acre-ft
- Surface area
- 2,380 acres
- Hydraulic height
- 92 ft
- Drainage area
- 15,848 sq mi
- Spillway
- Controlled, 64 ft wide
- Army Corps district
- Sacramento District
- Also known as
- Guernsey Reservoir
- NID ID
- WY01293
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID WY01293 at nid.sec.usace.army.mil. Project website.