Green Infrastructure Maintenance

Proper operations & maintenance (O&M) of Green Infrastructure facilities in this final post-construction phase will dictate whether the long term benefits intended are realized. The decisions made by everyone on the project team play a role in how costly or easy is will be to maintain GI practices. The ability and preference of the maintenance staff and land owners should be considered when choosing which GI practices to implement. Low cost maintenance green infrastructure facilities and landscapes should always be considered first, since the owner's long-term costs can be much higher than the costs associated with the up-front planning, design, and construction costs. If a particular facility is required by a jurisdiction, the design team should engage in an educational effort to clarify the benefits of the facility and the maintenance requirements to the owner and staff.

Seattle Maintenance Manual (pdf): This links to Seattle Public Utilities "Natural Drainage System (NDS) Maintenance Manual", which defines levels of service for green infrastructure practices with pictures and clear descriptions for maintenance needed for inlets, outlets, vegetation, soils, check dams, etc.

Salmon Safe High Risk Pesticide List (pdf): This list of pesticides have been identified by various regional experts as being a "serious threat to salmon and other aquatic life". Pesticides inside stormwater facilities should be avoided anyway, but for areas that drain to  stormwater facilities and streams, if pesticides must be used, avoid ones that are on this list.

Field Guide: Maintaining Rain Gardens, Swales, and Stormwater Planters (pdf): Developed and reviewed by a wide variety of practitioners, this maintenance guide was developed to serve as a field guide for contractors and maintenance staff.

Inspection Checklists: Sample checklists for maintaining green infrastructure BMPs

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