Tappan Dam
Dam in Harrison County, Ohio · Little Stillwater Creek · forms Tappan Lake
Height
52 ft
16 m (NID height)
Length
1,550 ft
472 m
Completed
1936
Tappan Lake today
899.10 ft
7 days ▼ 0.03 ft
vs full pool
▼ 34,181.90 ft
Normal storage
35,100 acre-ft
Above normal for the date
Reservoir level measured Oct 23, 2026, 1:15 PM EDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Fish and Wildlife Pond; Recreation
- Dam type
- Earth
- Structural height
- 52 ft
- Owner
- USACE - Huntington District (Federal)
- Maximum storage
- 61,600 acre-ft
- Surface area
- 2,350 acres
- Hydraulic height
- 45 ft
- Drainage area
- 71 sq mi
- Spillway
- Uncontrolled, 250 ft wide
- Army Corps district
- Huntington District
- Also known as
- Tappan Lake
- NID ID
- OH00010
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Sep 9, 2026. Search NID ID OH00010 at nid.sec.usace.army.mil. Project website.