Can a perimeter curb or similar device be provided (to limit wheel loads upon the Yes No trench)? ** Design Elements and Feasibility – Infiltration-DPP BMPs * Required Design Element (see definition above) – ** Recommended Design Element (see definition above) – Has a detailed soil investigation been conducted, to assure stability of the slope? ** Yes No Does the soil have adequate infiltration rates or can the soil be amended to increase Yes No its infiltrating properties? ** Are flow velocities from a peak drainage facility design event < 4 fps (i.e. low Yes No enough to prevent scour or erosion of DPP (swale or conveyance) as per HDM Table 873.3E)? Or has the BMP been designed to prevent scour or erosion for higher velocities (e.g. rock lined ditch). *
Can a perimeter curb or similar device be provided (to limit wheel loads upon the trench)? ** Design Elements and Feasibility – Infiltration-DPP BMPs * Required Design Element – (see definition above) ** Recommended Design Element – (see definition above) Yes No Has a detailed soil investigation been conducted, to assure stability of the slope? ** Yes No Does the soil have adequate infiltration rates or can the soil be amended to increase its infiltrating properties? ** Yes No Are flow velocities from a peak drainage facility design event < 4 fps (i.e. low enough to prevent scour or erosion of DPP (swale or conveyance) as per HDM Table 873.3E)? Or has the BMP been designed to prevent scour or erosion for higher velocities (e.g. rock lined ditch). * Yes No
T-1part-2-10.docx