3301 CEDAR ST 2018-01-02 MF Import

, � I SITE INFORMATION � UPSTREAM ANALYSIS i The CrystaLite facility roof downspouts c�irrcntly oudall to the south of the proposed Biringer Warehouse and sheet flow into a catch basin in the alley between Cedaz and Pine Street. 7 hese flows will be bypassed in the developed condition and be directed to the same catchbasin via an area drain and pipe system. Due to the generally 8at topography of the area and the proximity of this site to recent development tliere aze no other oCfsite tnbutary areas. DOWNSTREAM ANALYSiS I Site drainage generally sheet flows to the south east into the alley between Cedar and Pine Street where it enters a storm drain. A 12" catch basin and pipe system conveys flow south towazd 34�h Street. At 34`h I Street the drainage system tums easf ar.d crosses under Intentate 5 near the sign post pictured in Figure 4. The downstream unalysis was tertni�ated at this point as it is uncleaz where this pipe discharges on the other side of Interstate 5. It is appazent that the Flow conveyed by this catch basin s}5tem discharges into I the Snohomish River which is approximately 750 R east of where this downstream analysis was terminated. No signs of erosion or conveyance inadequacies were noted during a site visit. � I I I I I IDr�inage Report P e 5 Diringer Wurehouse lune 2qQ6 i I �l