Blue Marsh Dam
Dam in Berks County, Pennsylvania · Tulpehocken Creek · forms Blue Marsh Lake
Height
100 ft
30 m (NID height)
Length
1,775 ft
541 m
Completed
1977
Blue Marsh Lake today
287.15 ft
7 days ▼ 2.28 ft
Normal storage
22,897 acre-ft
Normal for the date
Reservoir level measured Oct 23, 2026, 2:00 PM EDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Recreation; Water Supply
- Dam type
- Rockfill
- Structural height
- 100 ft
- Owner
- USACE - Philadelphia District (Federal)
- Maximum storage
- 129,900 acre-ft
- Surface area
- 1,147 acres
- Hydraulic height
- 94 ft
- Drainage area
- 175 sq mi
- Spillway
- Uncontrolled, 300 ft wide
- Army Corps district
- Philadelphia District
- Also known as
- Blue Marsh Lake
- NID ID
- PA00921
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Sep 8, 2026. Search NID ID PA00921 at nid.sec.usace.army.mil. Project website.
Other dams at Blue Marsh Lake
- Blue Marsh Dam - Dikes A and B