HomeMy WebLinkAboutWPO201500015 Review Comments Bond Inspection 2018-08-208/17 - Free State Run Inspection, WP0201500015 As -built:
The inspection noted the following deficiencies below. Please complete the remaining items in order to
get approval for a reduction or release of the current bond amount:
Biofilter (Bioretention, Lvl 1):
• This is a level 1 bioretention (not anything else), because the CDA is 0.66ac it must have a 2'
media filter depth (Min). Action: Remove mulch & trees; Add 6" (Min) of biomix soil & place 3"
mulch on top; Install trees & plug/container plants.
• Show the planting plan meets Section 6.8 (plants, location, type).
• Install lined (riprap/grass) channel to bioretention for the concentrated discharge that appears
to be coming down slope from ditch line above
• Permanently stabilize (w/ grass) the drainage area above going to the facility
• Building setbacks: The bioretention should be place 10' from building; 50 feet if up -gradient
• Provide certified materials layer test report
Underground Detention:
• Clean out sediment layer accumulating at bottom of pipe. 3" orifice appears to be buried under
sediment.
• Parge brick & stone (area around pipes) and clean out brick & debris from MH bottoms (i.e. Str-
D2)
• Install ES-1 at Str-D1 end, and key -in 8' long riprap OP
• Certification of proper dimensions & installation
Detention Pond:
• Remove trees on embankment; trees should be prevented from growing in a 10' buffer around
embankment
• Provide embankment certified compaction & fill material test reports.
• Provide I'freeboard above the spillway
• Install & key -in 8' OP
Once these items are completed, you may request another inspection.
Regards,
David James
Civil Engineer I