Habitat Restoration in Thunder
Bay, Lake Huron
varying in size from 6 to 18 inches (donated by Lafarge) was used to
reefs. Reefs are located adjacent to the Cement Plant reef and CKD
reef; sites where
spawning lake trout congregate. The East Reef serves as a reference
will not be altered. Different
configurations allow evaluation of height, size, and orientation as
that affect spawning and egg survival.
I – Eight
small ‘pilot’ artificial reefs were built in 2010 to begin
each reef is 30 feet in diameter by 9 feet high.
Monitoring wells were installed in six reefs to measure water
quality within the reef structure
Construction of functional prototype reefs was completed in summer, 2011
24 reefs, 8’ wide, 75’ long.
reefs are either 5' or 10' high, oriented either NW-SE or
one large reef, 300’ long, was added
diagram of reef construction
(click on image for
Map of Thunder Bay and Reef