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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 294.74 feet above NGVD29
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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 -> 2023-09-30)

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 1,340 1,010 1,130 2,830 7,300 2,910 1,710 962 963 1,240 1,850 2,090
2 1,330 985 1,120 3,040 7,040 2,900 1,680 918 929 1,230 1,750 2,080
3 1,310 1,000 1,100 3,250 6,730 2,860 1,600 923 912 1,160 1,790 1,930
4 1,300 1,060 1,100 3,440 6,640 2,740 1,530 909 950 1,140 2,120 1,870
5 1,260 1,080 1,090 3,560 6,500 2,650 1,550 910 937 1,130 2,090 1,740
6 1,230 1,090 1,090 3,580 6,180 2,540 1,530 908 896 1,100 1,970 1,700
7 1,250 1,070 1,120 3,580 5,970 2,480 1,550 892 882 1,110 1,880 1,840
8 1,220 1,050 1,120 3,760 5,820 2,530 1,520 903 862 1,160 1,900 1,840
9 1,180 1,040 1,150 3,850 5,710 2,490 1,550 914 846 1,170 2,070 1,750
10 1,180 1,010 1,180 3,920 5,600 2,350 1,470 941 907 1,190 2,110 1,740
11 1,170 993 1,210 3,930 5,430 2,260 1,450 1,010 909 1,160 2,010 1,750
12 1,170 1,000 1,240 3,980 5,130 2,250 1,350 1,020 1,000 1,060 1,920 1,830
13 1,160 1,040 1,320 4,160 5,020 2,270 1,320 971 1,010 1,090 1,850 1,870
14 1,140 1,030 1,390 4,550 4,880 2,250 1,280 979 988 1,080 1,850 1,940
15 1,180 1,010 1,370 4,890 4,690 2,170 1,240 965 1,000 1,170 1,860 1,840
16 1,180 994 1,350 5,160 4,540 2,150 1,290 931 975 1,290 1,890 1,760
17 1,140 990 1,390 5,300 4,340 2,090 1,230 898 961 1,390 1,960 1,660
18 1,130 1,000 1,460 5,590 4,250 2,130 1,200 909 977 1,460 1,900 1,620
19 1,130 995 1,550 5,760 4,220 2,210 1,170 964 906 1,430 1,830 1,590
20 1,140 985 1,720 5,930 4,130 2,090 1,190 967 882 1,400 1,830 1,550
21 1,120 987 1,760 6,200 4,000 2,040 1,160 924 879 1,490 1,860 1,570
22 1,120 1,010 1,820 6,470 3,780 1,950 1,150 907 875 1,510 1,820 1,640
23 1,110 1,030 1,880 6,690 3,670 1,940 1,150 894 915 1,400 1,820 1,590
24 1,080 1,050 1,890 6,960 3,500 1,860 1,100 868 967 1,540 1,790 1,580
25 1,060 1,090 1,910 7,000 3,400 1,760 1,090 884 1,040 1,770 1,730 1,610
26 1,100 1,110 2,050 7,010 3,380 1,760 1,060 923 1,060 1,900 1,800 1,720
27 1,110 1,110 2,180 6,980 3,410 1,750 1,110 901 1,100 1,950 1,840 1,640
28 1,090 1,120 2,270 7,150 3,300 1,710 1,080 877 1,100 1,780 1,920 1,560
29 1,070 1,190 2,420 7,380 3,230 1,710 1,090 991 1,230 1,810 1,940 1,510
30 1,030   2,520 7,590 3,110 1,730 1,100 1,010 1,180 1,830 1,990 1,430
31 1,010   2,660   3,000   1,090 961   1,850   1,390