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Susquehanna River
American Shad Passages - 2007
Shad operations got off to a late start in 2007 due to colder than normal river temperatures, which had been in the mid to upper 40s through most of April. Little movement at the fishways is seen until water temperatures reach at least 50°F, which encourages upstream shad movement. The Conowingo East fish lift began operation on April 23, with a water temperature of 54°F and the 1st American shad passed through on April 26. Water temperatures then rose more quickly than normal. The last day of operation was on May 31 and the water temperature was 80°F. From 2002 through 2006, the water temperatures on May 31st at Conowingo ranged from 64 to 72° F. While the runs start up as water nears 50°F, they tend to slow down or cease when temperatures reach the upper 70’s. In 2007, favorable temperatures occurred during a much shorter time frame than usual.

Passage reports for the year are posted below. Click on individual counts to view detailed reports (reports in PDF format).

York Haven ceased counting on June 6, 2007. The ladder at York Haven remained open for passage in a non-counting condition until the end of June.

2007 Passages
  Fish Passage Facilities (downstream >>> upstream)
Date/Event Conowingo Holtwood Safe Harbor York Haven
final count 25,464 10,338 7,215 192
last day of operation May 31 June 4 June 5 June 6
June 2 -- 10,309 7,149 185
May 26 25,031 9,239 5,579 122
May 19 22,710 3,826 2,290 43
May 12 18,058 3,083 1,250 --
May 5 7,648 716 -- --
April 28 280 -- -- --
1st shad April 26 May 1 May 7 May 16
1st day of operation April 23 May 1 May 7 May 16
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