BMP Monitoring Sites - Urban Drainage and Flood Control District

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UDFCD BMP MONITORING SITES Porous Asphalt Pavement D L max = 1. 5∗ So ◊ Lmax = maximum distance between cut-off membrane normal to the flow (ft) ◊ So = slope of the base course (ft/ft) ◊ D = depth of gravel base course (ft) Subdrain System When the porous asphalt pavement is located on NRCS Type D soils, when the Type B or C soil sub-base is to be compacted for structural reasons, or when an impermeable membrane liner is needed, install a subdrain system using perforated HDPE pipe. Locate each perforated pipe just upstream of the lateralflow cut-off barrier. Do not exceed 20-foot spacing. Use a control orifice sized to drain the pore volume of empty each cell in 6 hours or more. Design Area Ratio The design area ratio shall not exceed 2.0 (ratio = And Effective contributing impervious area/porous pavement area). The Imperviousness interim recommendations for the effective imperviousness are given in the Manual.
UDFCD BMP MONITORING SITES Porous Asphalt Pavement Photo Gallery Installation Photos – April 2008 Site demo Excavated pit Coring into the catch basin Placing the #3 aggregate Layer of #67 aggregate Looking south Looking north Monitoring equipment box Porous vs. traditional asphalt ISCO Samplers Rain gage Rain gage mechanism
Page 2 and 3: UDFCD BMP MONITORING SITES Overview
Page 4 and 5: UDFCD BMP MONITORING SITES Pervious
Page 22 and 23: UDFCD BMP MONITORING SITES Porous A
Page 34 and 35: UDFCD BMP MONITORING SITES Permeabl
Page 46 and 47: UDFCD BMP MONITORING SITES Sand Fil
Page 48 and 49: UDFCD BMP MONITORING SITES Open Bed
Page 60 and 61: UDFCD BMP MONITORING SITES Orchard
Page 64 and 65: Orchard Pond EDB - Flow Dissipater

BMP Monitoring Sites - Urban Drainage and Flood Control District

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