BARRIER MANAGEMENT ALTERNATIVES

There are two categories of barrier management alternatives.

Barrier modification includes removal, partial removal, and outlet conversion, as alternatives that help eliminate effects on river processes.

Fishways deal with mitigating the obstruction effect of barriers on the migration and dispersal of fish.

Descriptions of each of the alternatives have been limited to the purpose, application and
information relating to costs and benefits. These techniques should be considered as alternatives when conducting an evaluation and impact assessment on an existing or proposed stream obstruction.

Suggested Reading:

· Palgrave Dam Aquatic Habitat Restoration Project Study Report. (I. B. Buchanan and W. K. Annable, 1997)

· Environmental Considerations for Assessing Dam Removal Alternatives for River Restoration (J. R. Shuman, 1995)

· Dam Removal Success Stories: Restoring Rivers Through Selective Removal of Dams That Don’t Make Sense (Friends of the Earth, Trout Unlimited and American Rivers,
1999)

· American Rivers Internet Web Site http://www.amrivers.org