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USGS 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.


! Statistics pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline.

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 -> 2025-09-30)

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
1 109 89 113 139 132 83 108 55 89 76 66 95
2 98 103 130 155 91 84 74 54 64 50 54 89
3 92 139 100 140 94 79 71 45 43 56 77 85
4 97 120 103 121 100 85 76 79 41 45 53 76
5 87 99 121 115 91 85 71 52 37 50 62 112
6 80 93 113 105 103 80 59 43 74 45 60 83
7 76 96 114 110 96 77 85 48 59 40 55 88
8 89 93 111 113 97 83 58 54 68 94 70 89
9 86 79 119 108 95 72 59 66 71 73 69 100
10 81 83 140 127 95 74 60 67 46 73 62 82
11 80 90 135 101 89 72 71 53 43 72 62 109
12 88 103 109 102 93 73 60 51 48 57 75 106
13 76 132 124 118 100 88 82 102 51 45 86 104
14 93 104 142 102 96 72 94 52 45 46 78 116
15 78 102 124 128 86 64 66 43 55 54 70 90
16 77 113 106 164 113 62 60 38 92 52 74 119
17 77 95 113 124 101 78 53 46 66 52 79 124
18 88 96 108 98 83 85 53 42 64 51 63 103
19 126 93 123 98 109 82 52 46 56 110 60 84
20 129 95 140 98 79 89 56 42 47 66 80 79
21 113 99 156 93 77 98 76 44 46 64 67 128
22 80 110 190 97 78 139 70 59 75 56 60 93
23 86 122 129 91 81 91 64 45 77 50 79 100
24 134 148 131 97 83 70 59 39 78 58 62 98
25 146 165 113 103 70 63 49 35 64 56 80 123
26 163 121 109 107 81 73 44 34 61 56 88 113
27 120 95 122 109 73 99 54 55 78 75 79 94
28 112 98 115 97 76 100 75 105 69 78 106 80
29 97 104 116 92 93 100 51 45 65 79 95 80
30 87   123 127 85 68 51 41 55 87 110 76
31 96   129   82   52 49   63   77