Loyalhanna Dam
Dam in Westmoreland County, Pennsylvania · Loyalhanna Creek · forms Loyalhanna Lake
Height
120 ft
37 m (NID height)
Length
960 ft
293 m
Completed
1942
Loyalhanna Lake today
923.99 ft
7 days ▼ 2.27 ft
vs full pool
▲ 14.47 ft
Normal storage
2,000 acre-ft
Much above normal for the date
Reservoir level measured Oct 23, 2026, 2:00 PM EDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Other; Recreation
- Dam type
- Gravity
- Structural height
- 120 ft
- Owner
- USACE - Pittsburgh District (Federal)
- Maximum storage
- 127,556 acre-ft
- Surface area
- 210 acres
- Hydraulic height
- 114 ft
- Drainage area
- 290 sq mi
- Spillway
- Controlled, 150 ft wide
- Army Corps district
- Pittsburgh District
- Also known as
- Loyalhanna Lake
- NID ID
- PA00106
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Sep 28, 2026. Search NID ID PA00106 at nid.sec.usace.army.mil. Project website.