Millstone River at Blackwells Mills, Somerset County NJ (BKWN4)
Gage Location: Somerset County, New JerseySite Location: Somerset County, New Jersey
Latitude: 40.475Longitude: -74.576Elevation: 26.97 ft. MSLDrainage Area: 258 Sq. Mi.
Minor Stage: 9 ft. Moderate Stage: 10 ft.Major Stage: 15 ft.
First Flood: 1924-04-07Last Flood: 2014-05-01 Crest: 15.87 ft.Datum change: 1928-08-17Number of Floods: 147

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Height Above Flood Stage for Entire Period of Record
Height Above FSTotal OccurencePercent of Crest OccurrenceCumulative Total Flood OccurrencePercent of Floods above Listed Value
9 ft to 10 ft5436.79 ft or above 147100.0
10 ft to 11 ft3322.410 ft or above 9363.3
11 ft to 12 ft2315.611 ft or above 6040.8
12 ft to 13 ft1510.212 ft or above 3725.2
13 ft to 14 ft96.113 ft or above 2215.0
14 ft to 15 ft32.014 ft or above 138.8
15 ft to 16 ft42.715 ft or above 106.8
16 ft to 17 ft21.416 ft or above 64.1
17 ft to 18 ft00.017 ft or above 42.7
18 ft to 19 ft10.718 ft or above 42.7
19 ft to 20 ft10.719 ft or above 32.0
20 ft to 21 ft00.020 ft or above 21.4
21 ft to 22 ft21.421 ft or above 21.4
Height Above Flood Stage After Datum Change
Height Above FSTotal OccurencePercent of Crest OccurrenceCumulative Total Flood OccurrencePercent of Floods above Listed Value
9 ft to 10 ft5438.09 ft or above 142100.0
10 ft to 11 ft3021.110 ft or above 8862.0
11 ft to 12 ft2114.811 ft or above 5840.8
12 ft to 13 ft1510.612 ft or above 3726.1
13 ft to 14 ft96.313 ft or above 2215.5
14 ft to 15 ft32.114 ft or above 139.2
15 ft to 16 ft42.815 ft or above 107.0
16 ft to 17 ft21.416 ft or above 64.2
17 ft to 18 ft00.017 ft or above 42.8
18 ft to 19 ft10.718 ft or above 42.8
19 ft to 20 ft10.719 ft or above 32.1
20 ft to 21 ft00.020 ft or above 21.4
21 ft to 22 ft21.421 ft or above 21.4