Prompton Dam
Dam in Wayne County, Pennsylvania · Lackawaxen River · forms Prompton Reservoir
Height
140 ft
43 m (NID height)
Length
1,200 ft
366 m
Completed
1961
Prompton Reservoir today
1,124.97 ft
7 days ▼ 0.19 ft
Normal storage
3,500 acre-ft
Normal for the date
Reservoir level measured Oct 23, 2026, 1:30 PM EDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Recreation
- Dam type
- Earth
- Structural height
- 140 ft
- Owner
- USACE - Philadelphia District (Federal)
- Maximum storage
- 72,800 acre-ft
- Surface area
- 290 acres
- Hydraulic height
- 127 ft
- Drainage area
- 60 sq mi
- Spillway
- Uncontrolled, 50 ft wide
- Army Corps district
- Philadelphia District
- Also known as
- Prompton Lake
- NID ID
- PA00011
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Sep 8, 2026. Search NID ID PA00011 at nid.sec.usace.army.mil. Project website.