2009-03-18 P & R Packet - Laserfiche WebLink

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Wetland A - No avoidance was necessary. Wetland was outside of the project construction limits for all alternatives. Wetland B - Alternative 1 - Routes the trail around the wetland to the north. This causes the need for easement and the need for the cross to a driveway at an unsafe location. Alternative 2 - Follows existing trail easements and avoids an unsafe driveway crossi ng. Wetland C - Alternative 1 - This alternative follows the existing property line, but creates an impact to the wetland. Alternative 2 - This alternative routes the trail around the wetland to the south, avoiding impact to the wetand. Wetland D - Alternative 1 - This alternative avoids the wetland, but brings the trail too close to neighboring homes creating a privacy issue. Alternative 2 - Trail crosses the wetland. Side slopes are tightened to 1:3 minimize impact. Wetlands E and F - Alternative 1 - This alternative avoids wetlands E and F, but brings the trail too close to neighboring homes creating a privacy issue. Additionally, the slopes are too steep along Center Street and would require retaining walls. Alternative 2 - Trail impacts wetland E. Trail alignment is adjusted to provide minimal impact to wetlands. Additionally, the side slopes are tightened to 1:3 to minimize impact. Wetland G - Alternative 1 - This alternative considers bringing the trail on-road along 20th Avenue to minimize impact to wetland G. However, 20th Avenue is a 45 mile per hour roadway and a safety issue is present and complete avoidance is not achieved. Alternative 2 - Trail impacts wetland G. Side slopes along the trail are tightened to 1:3 to minimize impact. Wetlands H, I and J - No avoidance was necessary. Wetlands were outside of the project construction limits for all alternatives. SP 02-090-01 Wetland Assessment March 2009 Page 3 of 5