Tappan Lake Water Level Today
Ohio · near Feed Springs · At full pool
- Elevation
- 899.37 ft
- From full pool
- +0.07 ft
- Percent of pool
- 100.2%
- 24-hour change
- +0.04 ft
- 7-day change
- −0.02 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Tappan Lake
Tappan Lake is at full pool, 899.37 ft, up 0.04 ft in the last 24 hours. That puts the lake at 100.2 percent of its conservation pool. The top of the flood pool is 9.6 ft higher, at 909.00 ft.
Over the last 7 days the level held steady, and over 30 days it fell 0.47 ft. In the 399 days of readings on this page the high was 901.36 ft on May 27, 2026 and the low was 894.33 ft on Jan 24, 2026, a range of 7.03 ft.
The reading is the U.S. Army Corps of Engineers gauge, near Feed Springs, taken Sep 21, 2026 and referenced to the NGVD29 datum. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Tappan Lake pool elevations
| Current elevation | 899.37 ft |
|---|---|
| Full pool (top of conservation) | 899.30 ft |
| Top of flood pool | 909.00 ft |
| Bottom of conservation pool | 870.00 ft |
| Top of dam | 924.40 ft |
| Inflow | 23 cfs |
| Outflow | 23 cfs |
| 30-day change | −0.47 ft |
| 1-year high | 901.36 ft (May 27, 2026) |
| 1-year low | 894.33 ft (Jan 24, 2026) |
| Vertical datum | NGVD29 |
| Operating agency | U.S. Army Corps of Engineers, LRH district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Ohio
- Alum Creek Lake 889.14 ft, +1.14 ft from full
- Atwood Lake 928.27 ft, +5.39 ft from full
- Berlin Lake 1,024.64 ft, +2.37 ft from full
- Charles Mill Lake 997.52 ft, +0.52 ft from full
- Clendening Lake 898.13 ft, +0.13 ft from full
- Deer Creek Lake 812.72 ft, +2.72 ft from full
Tappan Lake level questions
What is the water level of Tappan Lake today?
Tappan Lake is at 899.37 ft as of Sep 21, 2026, +0.07 ft relative to full pool (899.30 ft). The 24-hour change is +0.04 ft.
What is full pool at Tappan Lake?
Full pool, the top of the conservation pool, is 899.30 ft (NGVD29). Above that, water is stored temporarily in the flood pool up to 909.00 ft. The bottom of the conservation pool is 870.00 ft.
Is Tappan Lake rising or falling?
Over the last 24 hours the level is +0.04 ft; over 7 days it held steady, and over 30 days it fell 0.47 ft.
Where does this Tappan Lake level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Tappan Lake. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.