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I I Table 11-' FEATURES DIRECTLY AFFECTING WEST VALLEY OVERFLOW SPILLAGE AND LOCAL DRAINAGE I SOUTH BOULDER CREEK WEST V ALLEY OVERFLOW I . Rail line storages [H] . Highway 36 from Viele culvert [M] I I . Gross Reservoir [H] west to Basin Divide . Two spills above Highway 93 [H] . Lower drainage network through [M] . Spill above Highway 36 IH] Highway 36 and downstream . Spill above Arapahoe Road to and [H] along Foothills to near Baseline I including Wellman Ditch . Foothills and Baseline Intersection [H] . Channel, diversion, and backwater [M] including two storages with characteristics downstream of controls, storm sewers, roadway I Highway 36 grades . Westerly subbasin drainage [MI DRY CREEK NO.2 DITCH characteristics influencing discharge characteristics to South . Culvert under Highway 36 IH] Boulder and Bear Creek I including adjacent ditch and local watersheds drainage culverts under Highway . Crossover Ditch from Foothills to [H] 36 Dry Creek No.2 along Baseline . Spill structure and crossing of [H] . Lower Flatirons levee and culvert 1M] I South Boulder Road under the on ramp to Viele . Ditch, culvert, pipe and related IL] . Street drainage and subdivision 1M] storm sewers, minor spills, South characteristics north of Baseline Boulder Road to downstream of . Street drainage and subdivision 1M] I Baseline characteristics north of Wellman . 55th Ditch from Baseline to Euclid 1M] . Golf course and industrial/ 1M] 55th Ditch from Euclid to [H] commercial area north of Wellman downstream of the Wellman I I Downstream of 55th 1M] WELLMAN DITCH VIELE DRAINAGE SYSTEM . Bear Creek diversion and canal IH] crossing to and including Wellman I . Upper Basin conveyance network 1M] box culvert under Foothills . Upper Viele storages 1M] . Combined hydrologic inflows and IH] . Viele storages and culverts at [H] flow spill hydraulics along the Interchange Wellman I . Lower Viele outfall channel 1M] . Canal flow and levee [H] characteristics from Foothills to ANDERSON DITCH SYSTEM 55th . Canal flow and levee [H] I . Diversion and spillage from Bear [M] characteristics from 55th to South Creek Boulder Creek . Anderson conveyance system [L] . Foothills storm sewer and street 1M] from Broadway to Interchange flood water conveyance I . Anderson Ditch culvert entrance [HI characteristics and flow/spillage to and multiple pipe conveyance Wellman under Interchange, and blockage issues I . Anderson Ditch system east of [M] Foothills through off ramp area to next culvert downstream, through likely spill zone I . Anderson Ditch system east to [L] spill zone . Anderson Ditch spill to Viele 1M] . Anderson Ditch to South Boulder [L] I Creek I II - 9 I ----