6003 EVERGREEN WAY 2016-01-01 MF Import

H E M O R A N D U M �0 Jim Driscoll, Everect He ing Examiner FROM Public Works Departmant.�j� DATE November 16, 1990 SUAJECT Special Property Use Permit #13-90 Alderwood Water District Pump Station As a matter of record to the hearing examiner, with regard to the request by the "Stream-Keepers" group for construction of 150 feet of open channel for Pigeon Creek #1, the Public Works Department has the following comments: Generally the Yublic Works Department strongly prefers open stream channels to streams enclosed in culverts. Open channels provide water quality benefits and improved habitat conditions for fish and wildlife. This is especially true for Pigeon Creek #1, where an active program to re-establish a self-supporting fishery has been underway for several years. For this particular site, however, the Public Works Department would not object to utilizing a culvert system. This is based upon the following observations : 1. The stream is currently enclosed in a culvert at this site. Therefore, the proposed site plan would not decrease the length of Pigeon Creek #1 in an open channel condition. 2. The length o£ stream, approximately 150 feet, that could be changed to an open channel condiCion is very small compared to the length of stream upstream of this site that is culverted, approximately 3700 feet. 3. The upstream 3700 feet of culvert is under parking lots, city streets, and adjacent to steep slopes. This makes it highly unlikely that any of the upstream portions of Pigeon Creek #1 can be converted to an open channel condition.