Routine inspection and removal of sediment and unwanted vegetation. Issue: Corrective Action: Preventative Action: Eroded inflow apron Repair apron. Routine inspection and rehabilitation, if necessary. Issue: Corrective Action: Preventative Action: The vegetation loss and the blackish soil may indicate frequent inundation. Check the permeability rate of the soil and the water table elevation. Replace the soil if necessary. Routine inspection and tilling/aeration, if necessary. Issue: Corrective Action: Preventative Action: The low flow channel has excessive accumulation of sediment and debris. The outflow orifice is clogged by a trash bag and debris. Note that there is no trash rack installed. Check the permeability rate of the soil and the water table elevation. Replace the soil if necessary. Routine inspection and cleaning. Issue: Corrective Action: Preventative Action: Trash rack is damaged. Repair the trash rack. Routine inspection, especially after large storm events. Tighten any loose bolts and repair structural flaws. A well maintained detention basin
For Inspector For Maintenance Crew Component No. Component Name Inspection Item and Inspection Item No. Result Preventative / Corrective Maintenance Actions A1 Pretreatment (Forebay) 1 Scouring or erosion is present at inlet structure and/or riprap apron Y__ N__ Check the flow diversion device before the inlet pipe and whether the bypass flow channel is clogged Work # __________ 2 Clogged pipes or excessive sediment in the forebay Y__ N__ Remove sediment or debris 3 Damaged outlet structure (e.g., cracking, subsidence, spalling, erosion, or deterioration) Y__ N__ Repair or replace the outlet structure Work Order # __________ A2 Pretreatment (MTD, if installed) 1 MTD inspection Y__ N__ (If a MTD is used for pretreatment, see manufacturer’s maintenance manual) A3 Pretreatment (Structural BMP) 1 BMP inspection Y__ N__ (See BMP No. ________ Manual)
Note: B Infiltration Bed 3 Erosion or channelization is present Y__ N__ Check whether the flow bypass or diversion device is clogged the infiltration bed Work Order # ______________ 4 Animal burrows/rodents are present Y__ N__ Pest control Work Order # __________ 5 Uneven bed Y__ N__ Use light equipment to resurface the bed Work Order # _________ 6 Evidence of sinkholes or subsidence Y__ N__ Monitor for sinkhole development
Note: C Vegetation 1 spot(s) showing bare soil Y__ N__ Vegetative cover must be maintained at 85%. Revegetate the entire basin if 50% or more vegetation has been lost. Check Landscaping plan for guidance (if available) Work Order # __________ 2 Overgrown vegetation Y__ N__ Mow/trim the vegetation Work Order # _______
F Emergency Spillway 1 Trees or excessive vegetation present Y__ N__ Remove trees and roots, and restore berms if necessary Work Order #________ 2 Damaged structure Y__ N__ Repair Work Order #________ G Miscellaneous 1 Fence: broken or eroded parts Y__ N__ Repair or replace Work Order #__________ 2 Gate: missing gate or lock Y__ N__ Repair or replace Work Order #__________ 3 Sign/plate: tiled, missing, or faded Y__ N__ Repair or replace Work Order #__________ 4 Excessive or overgrown vegetation blocking access to the Y__ N__ Clear, trim, or prune the vegetation to allow access for inspection and maintenance Work Order #________ Note: