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Seminoe Reservoir water level

Reservoir, Wyoming, United States

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Right now

Very low for mid-October

Surface elevation

6,292.81ft Down 0.63 ft over the last 7 days

Water stored
226,584 acre‑ft
6,300 6,325 6,350

History

History
6,3006,3206,340ftOct 12Oct 13Oct 14Oct 15Oct 166,3006,3206,340ftOct 12Oct 14Oct 16
6,3006,3206,340ftSep 19Sep 25Oct 2Oct 9Oct 166,3006,3206,340ftSep 19Oct 2Oct 16
6,3006,3206,340ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20266,3006,3206,340ftOct 2025Apr 2026Oct 2026
6,3006,3206,340ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20266,3006,3206,340ftOct 2016Oct 2021Oct 2026
6,3006,3206,340ftJanMarMayJulSepNov20266,3006,3206,340ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

Seminoe Reservoir is far below normal for mid-October, with the lake level at 6,292.81 ft.

That puts it 39.75 ft below the median of 6,332.56 ft for mid-October, based on 36 years of readings. A year ago it stood at 6,311.28 ft (−18.47 ft).

It has dropped 0.63 ft over the past week. With the water still dropping, the shoreline keeps moving out. In the last month it has stayed between 6,292.81 ft and 6,295.61 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
6,332.56 ft39.75 ft below the median for this date
Normal for this date
6,299.89 ft – 6,348.44 ft8 years in 10 fall in this range (36 years of records)
Same day last year
6,311.28 ft−18.47 ft
Lowest and highest in 30 days
6,292.81 ft – 6,295.61 ft
Lowest and highest in 12 months
6,292.81 ft – 6,313.97 ft

On the water at Seminoe Reservoir

A receding shoreline opens up beaches but also uncovers hazards: stumps, rocks and soft mud that are usually well under water.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

The forecast is not available right now.

Sunrise 07:24 AM Sunset 06:23 PM Daylight 10 hr, 58 min First quarter 51%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
North Platte River above Seminoe Reservoir, near SinclairRiver gauge, North Platte River 3.19 ft Below flood stage −0.04 ft 21 mi
Pathfinder ReservoirReservoir 5,783.55 ft Very low 22 mi
Medicine Bow River above Seminoe Reservoir, near HannaRiver gauge, Medicine Bow River 2.04 ft Below flood stage +0.02 ft 23 mi
Alcova ReservoirReservoir 5,493.84 ft High 29 mi
Gray Reef ReservoirReservoir 5,329.36 ft Normal 30 mi
Lake Medicine Bow River at Boles Spring, near Medicine BowRiver gauge, Lake Medicine Bow River 1.09 ft Below flood stage −0.01 ft 38 mi
L Medicine Bow R above Sand Cr, near Shirley BasinRiver gauge, L Medicine Bow R 2.0 cfs Normal −0.3 cfs 40 mi
Rock Creek above King Canyon Canal, near ArlingtonRiver gauge, Rock Creek 1.16 ft Below flood stage −0.01 ft 53 mi

Questions and answers

How does Seminoe Reservoir compare with last year?

It is 18.47 ft lower than on the same day last year, when the reading was 6,311.28 ft.

What is a normal level for Seminoe Reservoir in mid-October?

The median for mid-October is 6,332.56 ft. In 8 years out of 10 the reading falls between 6,299.89 ft and 6,348.44 ft, based on 36 years of records.

Is Seminoe Reservoir really 6,292.81 ft deep?

No. 6,292.81 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 Seminoe Reservoir today?

On Oct 16, 2026, the surface elevation was 6,292.81 ft. Down 0.63 ft over the last 7 days.

Is Seminoe Reservoir rising or falling?

Down 0.63 ft over the last 7 days.

Is the level of Seminoe Reservoir normal?

Very low 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:467 (Agency page)
Coordinates
42.15580, -106.90810 (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 6,292.81 ft 2026-10-16 06:00 Provisional
Water stored 226,584 acre‑ft 2026-10-16 06:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Seminoe Reservoir (usbr:467). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/wyoming/seminoe-reservoir

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.