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USGS Surface-Water Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 01480617 West Branch Brandywine Creek at Modena, PA


Chester County, Pennsylvania
Hydrologic Unit Code 02040205
Latitude  39°57'42", Longitude  75°48'06" NAD27
Drainage area 55.0  square miles
Gage datum 262.52 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 1969-10-01 -> 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
1 110 89 114 136 135 83 97 55 91 76 67 97
2 99 104 132 157 92 85 67 55 65 50 55 90
3 93 141 101 142 96 80 71 44 43 56 78 86
4 98 122 104 121 100 87 77 81 42 46 53 77
5 88 100 122 115 91 86 72 53 37 50 63 113
6 80 94 111 105 103 81 59 41 75 45 61 84
7 77 97 115 110 98 78 87 43 60 40 56 89
8 90 94 112 114 99 84 57 42 69 96 71 90
9 87 79 120 109 95 73 55 53 72 74 70 102
10 82 84 141 128 95 75 58 62 46 74 63 84
11 81 90 137 102 90 73 71 52 43 73 62 109
12 89 104 110 100 94 74 60 51 48 57 75 106
13 77 133 126 118 102 90 83 103 53 45 87 105
14 94 104 144 103 94 73 94 52 46 46 79 117
15 78 103 125 130 85 65 64 43 56 54 71 91
16 78 111 107 168 109 63 59 38 93 53 75 119
17 78 93 114 125 100 79 52 46 67 53 80 125
18 89 96 109 99 83 86 52 42 65 52 64 104
19 127 94 125 99 110 83 52 46 56 111 61 84
20 131 96 142 99 80 89 57 42 47 66 81 80
21 115 100 157 94 77 100 77 44 46 65 68 129
22 81 111 193 98 78 143 71 60 76 56 61 94
23 87 124 131 93 81 93 64 45 77 51 80 101
24 136 150 132 99 83 71 59 39 79 58 63 99
25 148 167 114 105 71 65 50 35 64 57 81 124
26 166 122 110 108 82 74 44 35 62 56 89 114
27 121 96 124 111 73 95 55 56 78 76 80 95
28 114 99 116 99 76 98 77 107 69 79 107 80
29 98 104 118 94 91 102 52 46 65 80 96 79
30 88   125 130 85 68 52 42 55 88 112 75
31 97   130   77   52 50   63   77