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Swanson Lake and Trenton water level

Reservoir, Nebraska, United States

Directions

Right now

Normal for mid-October

Surface elevation

2,734.05ft Down 0.12 ft over the last 7 days

Water stored
41,405 acre‑ft
2,730 2,740

History

History
2,7302,7352,740ftOct 12Oct 13Oct 14Oct 15Oct 172,7302,7352,740ftOct 12Oct 14Oct 17
2,7302,7352,740ftSep 19Sep 26Oct 3Oct 10Oct 172,7302,7352,740ftSep 19Oct 3Oct 17
2,7302,7402,750ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20262,7302,7402,750ftOct 2025Apr 2026Oct 2026
2,7302,740ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20262,7302,740ftOct 2016Oct 2021Oct 2026
2,7302,7402,750ftJanMarMayJulSepNov20262,7302,7402,750ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

Nothing unusual at Swanson Lake and Trenton right now: the lake level of 2,734.05 ft is in the normal range for mid-October.

The median for mid-October is 2,735.89 ft, based on 36 years of readings, so the lake level is 1.84 ft below typical. On the same day last year the reading was 2,735.39 ft, a difference of −1.34 ft.

The level is falling, down 0.12 ft over the past week. Over the past 30 days it has moved between 2,734.05 ft and 2,734.28 ft.

Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
2,735.89 ft1.84 ft below the median for this date
Normal for this date
2,726.89 ft – 2,743.38 ft8 years in 10 fall in this range (36 years of records)
Same day last year
2,735.39 ft−1.34 ft
Lowest and highest in 30 days
2,734.05 ft – 2,734.28 ft
Lowest and highest in 12 months
2,734.07 ft – 2,739.64 ft

Swimming and boating at Swanson Lake and Trenton

At a normal level, ramps and marinas generally run as usual, and fishing tends to follow the season more than the water level.

If you swim, pick a spot with an easy way out, and remember that drop-offs move as the level changes.

Weather at the gauge

No rain in the last 3 days.

18 Sun 72° 36° – Wind 8 mph
19 Mon 69° 40° – Wind 9 mph
20 Tue 76° 49° 0.01 in Wind 16 mph
21 Wed 77° 53° – Wind 9 mph
22 Thu 78° 57° 0.07 in Wind 16 mph
23 Fri 82° 64° 0.02 in, 22% Wind 23 mph
24 Sat 69° 51° 0.06 in, 27% Wind 17 mph

Forecast: Open-Meteo

Sunrise 06:59 AM Sunset 06:01 PM Daylight 11 hr, 3 min First quarter 52%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Republican River at StrattonRiver gauge, Republican River 4.19 ft Low ±0 9 mi
Frenchman Creek at CulbertsonRiver gauge, Frenchman Creek 2.73 ft Normal +0.01 ft 11 mi
Frenchman Creek at PalisadeRiver gauge, Frenchman Creek 2.38 ft Normal +0.02 ft 13 mi
Driftwood Creek near McCookRiver gauge, Driftwood Creek 2.56 ft Normal +0.05 ft 20 mi
Republican River at McCookRiver gauge, Republican River 2.71 ft Very low +0.01 ft 23 mi
Hugh Butler Lake and Red WillowReservoir 2,564.61 ft Normal 24 mi
Republican River at BenkelmanRiver gauge, Republican River 2.81 ft Normal +0.05 ft 27 mi
South Fork Republican River near BenkelmanRiver gauge, South Fork Republican River −0.55 ft Below flood stage −0.04 ft 28 mi

Questions and answers

Is Swanson Lake and Trenton higher than last year?

No, it is 1.34 ft lower than on the same day last year, when the reading was 2,735.39 ft.

What is a normal level for Swanson Lake and Trenton in mid-October?

The median for mid-October is 2,735.89 ft. In 8 years out of 10 the reading falls between 2,726.89 ft and 2,743.38 ft, based on 36 years of records.

Is Swanson Lake and Trenton really 2,734.05 ft deep?

No. 2,734.05 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Swanson Lake and Trenton today?

On Oct 17, 2026, the surface elevation was 2,734.05 ft. Down 0.12 ft over the last 7 days.

Is Swanson Lake and Trenton rising or falling?

Down 0.12 ft over the last 7 days.

Is the level of Swanson Lake and Trenton normal?

Normal for mid-October. Compared with 36 years of daily readings for this time of year.

How often is this data updated?

The U.S. Bureau of Reclamation publishes a new reading once a day. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Bureau of Reclamation
Station code
usbr:3667 (Agency page)
Coordinates
40.17000, -101.06000 (WGS84)
Update interval
once a day
Licence
Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Surface elevation 2,734.05 ft 2026-10-17 06:00 Provisional
Water stored 41,405 acre‑ft 2026-10-16 06:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Swanson Lake and Trenton (usbr:3667). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/nebraska/swanson-lake-and-trenton

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.