Lake water level report
Island - 44003800
Mahnomen County
Water Level Data
Period of record: 09/16/1987 to 05/14/2025
# of readings: 155
Highest recorded: 1436.23 ft (01/17/1996)
Lowest recorded: 1426.84 ft (08/21/2021)
Recorded range: 9.39 ft
Last reading: 1428.96 ft (05/14/2025)
Ordinary High Water Level (OHW) elevation: 1427.8 ft
Datum: NGVD 29 (ft)
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Last 10 years of data, click to enlarge.
Benchmarks
| Elevation: 1434.97 ft | Datum: NGVD 29 (ft) |
| Date Set: 10/08/2003 | Location: T146R39S30 |
| Description: Found 2014. Double 60d spikes 0.5' above ground in the SW root of a 1.6' oak, on the side of a hill, 31' NNE of the centerline of a trail leading uphill from the unauthorized dike approx. 1200' downstream of lake, and approx. 90' NW from westerly end of the unauthorized dike at the trail crossing south of the lake. | |
| Elevation: 1436.23 ft | Datum: NGVD 29 (ft) |
| Date Set: 09/16/1987 | Location: T146R39S20 |
| Description: Horizontal 3/8" x 8" spike in NW root of 1.1' elm, 33' NE of South entrance to Island Lake Resort store, 13530 Island Lake Rd E, Lengby, 55' North of the boat access road and 89' West of road along East shore of lake. | |
| Elevation: 1433.4 ft | Datum: NGVD 29 (ft) |
| Date Set: 10/08/2003 | Location: T146R39S20 |
| Description: Found 2014 and chopped out. Horizontal 3/8" x 8" spike, 0.4' above ground in the NW side of a 1.3' basswood, 72' SSE of south entrance to Island Lake Resort store at 13530 Island Lake Rd E, Lengby, and 59' ESE of centerline of lakeward edge of boat ramp, at public access, off Rainbow Rd, Lengby, on east side of lake. | |
| Elevation: 1431.79 ft | Datum: NGVD 29 (ft) |
| Date Set: 06/16/2014 | Location: T146R39S20 |
| Description: Found 2025 for use only with prior permission from owner. Horizontal 3/8" x 8" spike, 0.7' above ground in landside of a 1.2' oak, at top of bank/water's edge, at south side of mowed area, 32' South of south edge of retaining wall and rocks at private dock area, at private residence, 13682 Island Lake Rd W, Lengby. | |