12115 19TH AVE SE 2016-01-01 MF Import

10. In reviewing the proposal, the City consulted with the Department of Ecology, the Department of Game and Snohomish County. (The County has completed a stream and wetland survey for the area.) Staff found that the site is fairly flat, with an elevated roadway running down the middle of the site from east to west. It appears that about the north half of the site may drain towards Silver Lake and the south half may drain to the south. 11. Andy McMillan of the Department of Ecology identified four wetlands existing on the site, one in approximately each corner of the site. One of these four wetlands had also been identified in the County stream and wetland survey. The two wetlands to the uorth are in good condition and appear to be providing significant water filtration and some habitat value. The twn wetlands to the south have been heavily grazed and the soil compacted by horses. Both the Department of Ecology and Department of Wildlife (Game) have indicated that these areas are not providing significant habitat, water filtration, or detention capacity. 1.2. The major drainage impacts of development of the site are the increased amount of storm water runoff and the quality of the runoff. Stormwater runoff from the site would run either toward Silver Lake to the north or to Ruggs Lake to the south. Both of these areas flow to North Creek, which is an important salmon and steelhead producing stream. Good water quality is important in maintaining the fisheries resources downstream. 13. In order to mitigate the impacts of the development, the City placed the following requirements on the DNS for the proposal.. a. Four wetland areas exist on the site. The two wetlands on the northeru portion of the site must be maintained in order to maintain the quality of water flowing into Silver Lake, to provide atormwater detention, and to provide wildlife habitat. The boundary of the two wetland areas must be staked by the applicant and approved by the Department of Ecology. In addition, a twenty-five foot buffer area must be maintained around the wetland area. Prior to any construction activity on the site, the boundary of the buffer areas must be roped off and no activity is to occur within the area unless approved by the Planning Department. The two wetland areas should be incorporated into the stormwater detention system. An easement will be required from the property owner to the northeast for construction of a detention system if the off-site wetland area is impacted. The buildings and parking shown on the site plan in these two areas must be removed/relocated. The revised site p1P.n must be reviewed and approved by the Planning Department prior to issuance of any permits. (SEPA Water Policies) -4-