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: 2014-03-31 Crest: 9.94 ft.Datum change: 1928-08-17Number of Floods: 146

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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 ft5437.09 ft or above 146100.0
10 ft to 11 ft3322.610 ft or above 9263.0
11 ft to 12 ft2315.811 ft or above 5940.4
12 ft to 13 ft1510.312 ft or above 3624.7
13 ft to 14 ft96.213 ft or above 2114.4
14 ft to 15 ft32.114 ft or above 128.2
15 ft to 16 ft32.115 ft or above 96.2
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 32.1
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 ft5438.39 ft or above 141100.0
10 ft to 11 ft3021.310 ft or above 8761.7
11 ft to 12 ft2114.911 ft or above 5740.4
12 ft to 13 ft1510.612 ft or above 3625.5
13 ft to 14 ft96.413 ft or above 2114.9
14 ft to 15 ft32.114 ft or above 128.5
15 ft to 16 ft32.115 ft or above 96.4
16 ft to 17 ft21.416 ft or above 64.3
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