USGS Pennsylvania Water Science Center FLOOD PEAK SUMMARY
Tropical Depression Ivan – September 17 to 21, 2004
Potomac River Basin – PROVISIONAL and SUBJECT to REVISION
USGS Station Number |
Stream Name |
Stream Location |
Drainage area (square miles) |
Period of known floods |
Maximum flood previously known |
Maximum during present flood |
||||||
Date |
Stage (feet) |
Discharge (cubic feet per second) |
Date |
Stage (feet) |
Discharge |
|||||||
Discharge (cubic feet per second) |
Unit Discharge (cubic feet per second per square mile) |
Recurrence interval range (years) # |
||||||||||
|
Wills Creek |
Hyndman |
146 |
1952 to present |
06/21/84 |
13.76 |
17,100 |
09/18/04 |
7.86 |
7,200 |
49.3 |
<10 |
|
Wills Creek |
Cumberland , MD |
246 |
1924 to present |
01/19/96 |
23.11 |
45,900 |
09/18/04 |
9.59 |
10,200 |
41.5 |
Not determined |
|
Tonoloway Creek |
Needmore |
10.7 |
1963 to present |
06/22/72 |
9.17 |
1,300 |
09/18/04 |
11.94 |
4,280 |
400 |
>500 |
# - Based on recurrence intervals computed from streamflow-gaging-station data found in Table 4 and Appendix 2 from U.S. Geological Survey Water-Resources Investigations Report 00-4189 Techniques for estimating magnitude and frequency of peak flows for Pennsylvania streams (PDF File).
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