10725 19TH AVE SE 2023-04-07 - Laserfiche WebLink

Inflow Area= 0.024 ac.100.00%Impervious, Inflow Depth> 1.65- Inflow = 0.07 cfs @ 11.92 hrs, Volume= 0.003 of Outflow = 0.07 cfs @ 11.93 hrs. Volume= 0.003 af, Atten=0%, Lag=0.4 min Routing by Stor-Ind+Trans method,Time Span=5.00-20.00 hrs.dt=0.05 hrs Max.Velocity=1.87 fps, Min.Travel Time=0.3 min Avg.Velocity=0.60 fps, Avg.Travel Time=0.9 min Peak Storage=1 cf @ 11.93 hrs Average Depth at Peak Storage=0.11' Bank-Full Depth=0.67' Flow Area=0.3 sf, Capacity=1.21 cfs 8.0' Round Pipe n=0.013 Corrugated PE,smooth interior Length=33.0' Slope=0.0100 7 Inlet Invert=459.80', Outlet Invert=459.47' MR#8 - Wetlands Protection No wetlands have been identified on or adjacent this site. MR#9 - Operation and Maintenance G. Maintenance and Operation Plan The City of Everett requires the owner or operator of the project drainage facility to maintain the facility in accordance with the City Maintenance Checklists. The following pages contain maintenance needs for components included in the project that are part of a drainage system. Those components must be contained within the project's Maintenance Plan. The property owner shall plan to complete a checklist for all system components on the following schedule: (M)Monthly from October through April. (A)Once in late summer(preferably September). (S)After any major storm(use 1 inch in 24 hours as a guideline). Photocopies of these pages shall be used and checked off for the problems looked for each time an inspection is completed. Comments on problems found and actions taken shall be noted. Some items do not need to be looked at every time an inspection is done. The suggested frequency at the left of each item shall be used as a guideline for inspections.