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BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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Table 4.3-3: Outlet Protection Inspection and MaintenanceINSPECTION AND MAINTENANCE ACTIVITIESInspect that conveyance is unobstructed and able to access the outlet protection.• Repair any blocked or diverted conveyances.Inspect for trash and debris.• Remove trash and debris from the area.Inspect for erosion, scour, and undercutting, especially at the drainage outlet and along the edges of the outletprotection.• Stabilize eroded and undercut areas.• Improve outlet protection to dissipate energy and prevent future erosion.Inspect for invasive weeds 1 .• Remove invasive weeds monthly during the first two growing seasons. Thereafter, weed annually, or asneeded.Inspect for accumulated sediment and debris. Measure depth of sediment and mark where measurement wastaken.• If accumulated material has covered outlet protection, removal of material is needed.• Remove accumulated sediment with vactor truck or shovel and dispose of sediment at a TRPA approvedstable on-site location or out of the Lake <strong>Tahoe</strong> Region.• If chronic sediment accumulation is a problem consider retrofitting a sediment trap upstream to easesediment removal.• Stabilize eroding slopes and bare soil areas to prevent sediment entry into conveyance system.• Routinely sweep the street/driveway to remove sediment before it enters the conveyance system.Inspect site for unusual or unsafe conditions and structural damage especially displaced rocks.• Repair components as necessary to restore proper function.Monitor ongoing effectiveness and determine whether another <strong>BMP</strong> type or additional <strong>BMP</strong>s could improvelong-term effectiveness and improve benefits to costs versus the existing outlet protection.• Analyze Inspection and Maintenance Log for trends and recurring issues.• Prepare a plan that more effectively addresses stormwater capture, reduces long term maintenance costsand improves overall effectiveness and safety of the <strong>BMP</strong>.SUGGESTEDFREQUENCYMonthly (April—Oct)and before majorstormsINSPECTIONEQUIPMENTMAINTENANCEEQUIPMENTTrash Bag ShovelMonthly (April—Oct) Trash BagMonthly (April—Oct)Monthly during firstgrowing season andannually thereafterSemi-annually(spring and fall) andafter major stormsAnnually in springEvery 5 yearsInvasive WeedsInspectorStaff Plate, StadiaRod or RulerQualified Individual(safety/structuralcondition)Qualified Inspectoror ConsultantAdditional ArmorRocks and Tools asneededTools as needed tocontrol infestationShovel, Backhoe, orVactor TruckPickup or DumpTruckTools as neededQualified Inspectoror Consultant1Lake <strong>Tahoe</strong> Basin Weed Coordinating Group. http://www.tahoeinvasiveweeds.org/.TRPA <strong>BMP</strong> Handbook Chapter 4: <strong>BMP</strong> Toolkit2012 4.3.1.4-Outlet ProtectionPage 5

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