8003 LARIMER RD 2016-01-01 MF Import

ME110RAUDUM TOi ADDRESS FIT.E 8003 LARIMER ROAD 7R0!(a DAN MATHIAS DI�TEi September 23, 1987 BDBJECTt WOOD CREER ORAINAGE PRODLEM In response to a concern expressed by Hrs. Sp°:ne at 8003 Larimer Road, I inspected Woo�i Creek in south Everett �n SE�itember 21, 1987. Wood Creek has been running quite turbid in the lae:. few days according to Mrs. Spane even thouah it has not rained since September 14, 1987. The Creek was indeed runninq qui-te turbid, so I attempted to determine the source of the sediment. I walked up the creek from Larimer Road approximately 1000 feet until the brush got very thick. The water was still rvnning very turbid 1000 feet upstream of Larimer Ruad. No source of eediment (e�. channel bank erosion) was noted in this 1000� reach of Wood Creek. Approximately 2 years ago, the Department cf Transportation repaired a storm drain outfall vashout adjacent to I-5. This area drains to Wood Creek and washed tons of sediment onto the Spane property in 1985. I inspected the repaired outfall on September 21, 1927 and found it to be £unctioning properly. In £act, the stream wae running very clear as fa: a� Z walked downstream (which was approximately 200� downstream of th� confluence of the north and south forY.s of Wood Creek). Two si.tee which currently have Public Works Permits were also inspected. These were the Eastmont Shopping Center and khe logginq and clearing operation near 3hadow Wood Drive. No sediment was being generated at either oE these sites. The source or cause of the problem, therefore, is within the approximately 3000 feet reach of the stream that I did not walk because of heavy brush. The problem could be a na�tural wash out f:om stream cut or mobilization of tt�e sand bottom of the stream channel. The sand was deposited during the I-5 sturm drain outfall washout two years ago. The most recent rainfall on September 14, 1987 was a small event (.25" of rainy, but may l�ave been large enough to incsease stream velocity above the non-erodible velocity of the sand. It was noted that the upper reaches of the strcam where the water was running clear, the channel bottom was mostly 9ears� beforee the sand i s�fully It may just take a while (several ) flushed from the stream system.