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For more information on these projects, please call Terry Colvin, Project Manager, at 682 -5398, or Eric Wold, Wetlands Program Supervisor, at 682 -4888. Other Environmentally Sustainable Programs: • Bio- engineering, restoration techniques at work in natural areas across the city. • Oak habitat restoration in progress in natural areas across the city • Riparian habitat restoration in Whilamut Natural Area of Alton Baker Park • Native upland prairie habitat restoration at Skinner Butte Park (see Skinner Butte Park master plan at: http: / /www.ci.eugene.or.us /PARKS /sbp /sbpmplan.htm) • Oak and forest habitat restoration at Hendricks Park, many acres of ivy removed from park annually (see Hendricks Park Forest Management Plan at: http://www.ci.eugene.or.us/PARKS/hendricks/hpfmp.htm) • Invasive and native plant list developed for use citywide A Segment of Amazon Creek Bank is Fortified with a Bio- En_gineerinq Technique Consistent with the City's commitment to manage open waterways in an environmentally sensitive manner, Parks and Open Space Natural Resources Maintenance staff are employing a bioengineering technique to repair several segments of Amazon Creek that have been deteriorating due to erosion. Last week a 30 -foot section of the bank on the south side of the creek between Garfield and City View was stabilized. The technique first involved removing the deteriorated slope with a mechanized excavator. Next, the toe of the bank was packed with large rock from the base of the bed to about two to three feet above the mean water line. Above this rock footing, layers of geotextile netting were laid out, filled with the soil removed from the excavation, and finally wrapped and compacted to form stair -step horizontal surfaces all the way up the bank. Because the soil - filled "wraps" are anchored in place, the bank can be cultivated with native plants along these terraces. Native seed mix was planted as the wraps were being constructed, and crews will follow -up in the fall by sowing more native seed mix and planting willow, dogwood, and possibly ash trees on the upper banks. Relatively new, this bioengineered technique for stabilizing banks in high volume flow conditions was also utilized by the City's construction contractor at the Alton Baker Park boat launch at the beginning of last year. Open Waterways Team planning staff decided to apply this technique to Amazon Creek because it provides for both the structural integrity of the channel bank as well as leaves room for creating an aesthetically pleasing environment with the native plants along the bank. The native vegetation also provides a pocket of habitat for wildlife along this section of the channel. "We have several other segments to repair before the rains begin," says Natural Resources Maintenance Supervisor John Clark, whose crews are actually performing the work. "This has been an excellent training opportunity to develop this expertise in- house." Amazon Creek has served as a flood control channel for the city for the past 50 years. The waterway, which flows through the heart of the city, continues to experience bank stability problems due to erosional scour along the channel bottom. This in turn undermines the toe of the channel banks resulting in the bank slumping away. For more information about this project, call John Clark in Parks and Open Space at 682 -4826.