Historic Daily Lamprey Passage Graph

River Flow versus Collection Count

Step 1.  Select Year:
Step 2.  Select Project Site:
Step 3.  Select Species:
Step 4.  Select Start Date and End Date in mm/dd format:
Step 5.  Submit Form or Reset


  • Click here for information about these data.
  • Flow data used for the dams is an average of the final Army Corp of Engineers' hourly flow data for the sampling time frame, usually 7:00 AM to 7:00 AM.
  • Flow data used for the traps is from the closest USGS gages - further information is available from the data reporting sites webpage.

Return to Lamprey Data Queries

Page last updated on: March 14, 2017

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