SBMB Service Area

Construction Progress

   

SBMB Construction Progress

Phase 1 was planted in 2004 and completed in 2005. This involved planting native trees and shrubs on 40 acres using different planting techiques to determine what methods produce the best results.  In one area commercial tree planting methods using mechanical tree planters, bareroot stock, and blue plant protector tubes was used, in the other area containerized plants were hand planted and protected from deer and voles with special coatings.

 

Large woody debris has been moved onto the site and perch poles for raptors installed.  Plantings have done very well on the site due to ideal soil conditions with some species reaching 10-12' in height by year 2. 

 

 

 

 

Phase 2 covers 115 acres and was started in 2005.  This portion of the site required extensive grading to re-establish a meandering stream channel and de-leveling to promote habitat diversity in areas that had been leveled and drained for agriculture.  Trees and shrubs will be planted in the spring of 2006.

After a year of vegetative growth and stabilization, the water control structure was completed and the site was connected to the water source in 2006.  The log weir system will allow salmon to access the site for off channel rearing and refuge.  Salmon fry  come onto the bank to escape floods and feed throughtout the site as they mature and prepare to head downstream. 

Phase 2 was completed with over 27,000 trees and shrubs planted in the higher elevation areas and uplands surrounding the wetlands.  Tree survival based upon the success of phase 1, has been excellent due to the fertile soil and moist growing conditions.

Wildlife use of the bank has been lead by migrating waterfowl who use the sites by the thousands.  The waterfowl attract eagles, perigrine falcons, red tailed hawks, marsh hawks, coyote, fox and others. 

The Mitigtion Bank Review Team made up of the Corps of Engineers, Washington State Department of Ecology, EPA, Snohomish County and Department of Natural Resources with help from the Washington State Department of Fish and Game have done numerous site visits and released a significant percentage of the available wetland mitigation credtis.