The Interstate Commission on the Potomac River Basin (ICPRB) and the Maryland
Department of Natural Resources coordinated and convened a workshop
to bring together an expert panel
stakeholders to establish a method for determining the minimum flow-by
requirements. Two important
guidance statements were developed to frame the overall flow-by study and workshop.
1. The Management Objectives of a new flow-by study:
- Estimate the amount and quality of biotic habitat available at different flow
levels, particularly as it relates to the current minimum flow-by requirement; and
- Determine what instream flows are required to provide adequate aquatic habitat and
to prevent reduction of any representative important species beyond levels from which
it cannot recover and re-colonize the area following a drought event.
2. The Workshop Purpose:
Investigate and develop a method to evaluate the environmental flow-by requirements of the
mainstream Potomac River between Seneca Pool and Chain Bridge, with the aim of providing the
- The most favorable method, given current financial resource limitations, to address
the Potomac River Flow-By Study objectives; and
- An alternative long-term method that could better accomplish those objectives, yet
might exceed current resources or available data, and recommended guidelines for achieving
the objectives in a longer time-frame.
Efforts planned subsequent to the Workshop are:
- This Workshop Summary Report, including panel recommendations is created and posted on the Internet
for comment by participants
- After receiving comments, the final report will be submitted to the Habitat Assessment Subcommittee (HAS)
- The HAS will recommend further actions to the Potomac Flow-By Committee.