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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01029500 East Branch Penobscot River at Grindstone, Maine


Penobscot County, Maine
Hydrologic Unit Code 01020002
Latitude  45°43'49", Longitude  68°35'22" NAD83
Drainage area 837  square miles
Contributing drainage area 1,086.0  square miles
Gage datum 294.10 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1902-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 1,350 1,010 1,140 2,820 7,290 2,900 1,730 965 969 1,250 1,850 2,090
2 1,330 986 1,120 3,020 7,050 2,880 1,700 921 935 1,240 1,750 2,070
3 1,320 1,000 1,110 3,230 6,740 2,850 1,620 925 918 1,160 1,780 1,930
4 1,300 1,060 1,100 3,410 6,650 2,730 1,550 910 953 1,150 2,110 1,870
5 1,270 1,080 1,100 3,540 6,490 2,650 1,560 912 940 1,140 2,080 1,740
6 1,240 1,090 1,100 3,560 6,160 2,550 1,540 910 899 1,110 1,960 1,690
7 1,250 1,070 1,140 3,560 5,950 2,490 1,550 894 885 1,120 1,870 1,830
8 1,220 1,050 1,160 3,740 5,800 2,540 1,530 905 867 1,200 1,890 1,830
9 1,180 1,040 1,180 3,830 5,690 2,510 1,560 938 852 1,210 2,060 1,740
10 1,190 1,010 1,210 3,900 5,570 2,370 1,470 959 911 1,220 2,100 1,730
11 1,170 992 1,240 3,920 5,400 2,280 1,460 1,020 915 1,170 2,000 1,770
12 1,170 1,000 1,280 3,990 5,100 2,260 1,380 1,030 1,010 1,080 1,910 1,890
13 1,160 1,040 1,340 4,180 4,990 2,280 1,340 978 1,010 1,110 1,840 1,900
14 1,150 1,030 1,410 4,580 4,850 2,260 1,290 986 1,030 1,100 1,850 1,950
15 1,180 1,010 1,390 4,930 4,660 2,160 1,250 972 1,040 1,180 1,850 1,860
16 1,180 992 1,370 5,210 4,510 2,140 1,300 937 1,000 1,300 1,880 1,770
17 1,150 988 1,400 5,350 4,310 2,090 1,250 904 997 1,410 1,950 1,680
18 1,130 997 1,480 5,670 4,220 2,170 1,210 915 1,000 1,480 1,900 1,670
19 1,130 992 1,540 5,850 4,190 2,270 1,200 980 937 1,440 1,820 1,820
20 1,140 982 1,710 5,990 4,100 2,150 1,220 986 930 1,420 1,820 1,710
21 1,120 984 1,750 6,250 3,990 2,080 1,180 942 914 1,500 1,850 1,670
22 1,120 1,000 1,810 6,500 3,770 1,980 1,170 923 900 1,530 1,810 1,700
23 1,110 1,030 1,870 6,710 3,650 1,960 1,160 907 932 1,430 1,820 1,630
24 1,080 1,050 1,880 6,980 3,480 1,870 1,110 877 980 1,560 1,790 1,620
25 1,060 1,090 1,900 7,000 3,390 1,780 1,090 892 1,060 1,780 1,730 1,640
26 1,100 1,100 2,030 6,990 3,380 1,780 1,070 932 1,070 1,910 1,790 1,740
27 1,110 1,110 2,170 6,950 3,400 1,770 1,110 909 1,110 1,960 1,840 1,660
28 1,090 1,120 2,260 7,120 3,290 1,740 1,080 883 1,110 1,790 1,920 1,580
29 1,070 1,220 2,410 7,360 3,220 1,740 1,100 995 1,240 1,820 1,940 1,520
30 1,030   2,510 7,570 3,090 1,760 1,100 1,020 1,180 1,830 1,980 1,450
31 1,010   2,640   2,980   1,090 966   1,860   1,400