The document discusses stormwater BMP maintenance, providing information on developing a maintenance strategy and conducting regular and periodic inspections. It outlines key steps for developing a maintenance strategy, including creating a facility inventory, developing a work plan, and assigning personnel. Regular inspections should check for trash, sediment, erosion, plant health and coverage. Periodic inspections examine infrastructure and include testing. Regular maintenance procedures are described for soil stabilization, debris and sediment removal, plant upkeep, and invasive species control.

1. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Stormwater BMP Maintenance
Importance
• Maintain the function of the BMP
• Maintain environmental and habitat
benefits
• Maintain appearance-public acceptance
• Prevent costly future repairs

2. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Developing a Maintenance Strategy
Facility Inventory
• Obtain maintenance plan
and design documents
• Visit the site to review
conditions, access
• Contact the local
governmental jurisdiction

3. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Developing a Maintenance Strategy
Work Plan
• Review facility inventory
• Review maintenance guides
• Create a list of activities,
equipment needed and cost
• Review plan with owner and local
governmental officials
• Modify or create checklist and
record keeping procedures
• Assign and educate personnel
• Implementation and evaluation

4. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Inspections
Location
• Upstream Parking Lots & Paved Areas
• Upstream Unpaved Areas
• Forebays
• Main Treatment Area
• Storm Sewer Pipes and Structures

5. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Inspections
Frequency
• Weekly during establishment period
• Weekly/monthly after establishment period
• Complete when doing regular site maintenance
• Some inspections should occur during rainfall
• Some inspections should occur 24 hours after rainfall
Weeds and invasive species a
few months after planting
Immediately after planting
During rain eventAfter establishment period

6. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Inspections
Visual Assessment
• Trash and debris
• Sediment accumulation
• Bare soil and erosion
• Plant coverage
• Plant health
Trash and debris
Sediment accumulation
Plant coverage
Erosion
Plant Health

7. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Inspections
Visual Assessment
• Soil moisture and percolation
• Weeds and invasive species
• Animal and insect damage
• Mulch condition
Weeds and invasive species
2 months after planting
Soil percolation
Animal damage Mulch

8. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Periodic Inspections
Frequency
• Annually or as needed
• Increase frequency to monitor
identified potential problems
• During storm events

9. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Periodic Inspections
Visual Assessment
• Storm sewer pipe and structure
condition
• Dam, embankment, overflow
weir condition
• Stormwater Flow

10. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Periodic Inspections
Testing and Surveys
• Soil testing
• Soil profile
• Stormwater flow
• Detention volume
• Water testing

11. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Soil Stabilization
• Establishment Period
• Management Period
• Repairs

12. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Clean Up – Trash and Debris
• Location
• Equipment
• Frequency
• Disposal

13. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Clean Up – Sediment Removal
• Location (Upstream, Forebay,
Structures, Ponding & Treatment
Area)
• Equipment
• Method (Avoid heavy equipment
of select soils)
• Frequency
• Disposal
• Amount (All or partial)

14. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Plant Density
• Facility age
• Plant loss
• Season
• Plant spacing
Year 1 Year 2
Year 4

15. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Species Removal –General
• Importance
• Frequency
• Environmentally sensitive practices
• Plant identification-use photo guides

16. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Species Removal –By Hand
• Method
• Frequency
• Weed species knowledge
• Clean Up (removal of Biomass)

17. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Species Removal –Mowing
• Equipment
• Method
• Height
• Frequency
• Edging
• Clean Up (removal of Biomass)

18. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Species Removal –Edging & Trimming
• Purpose
• Equipment
• Method
• Frequency
• Clean Up (removal of
Biomass)

19. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Species Removal –Burning
• Benefits
• Local regulations
• Method (Spot and Large Area)
• Frequency

20. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Species Removal –Chemical
• Integrated Chemical Management
• Product Selection
• Timing
• Method/Application

21. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Aquatic Species Removal
• Cattails
• Reed Canary Grass
• Algae

22. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Invasive Woody Species Removal
• Location
• Equipment
• Method
• Frequency

23. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Plant Maintenance
• Aesthetic Goals
• Frequency
• Plant Characteristics
• Watering
• Replacements
• Disease

24. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Soil Amendments
• Type (Organic vs Inorganic
• Composition
• Frequency
• Application Rate
• Adjacent Areas

25. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Regular Maintenance Procedures
Pest Management
• Animal damage
• Insects

26. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Stormwater BMP Maintenance
Resources
• APWA MARC Maunal of Best Management Practices for Stormwater Quality, Mid America Regional Council, August
2009
• “Maintaining Stormwater Systems: A Guidebook for Private Owners and Operators”, Northern Virginia Regional
Commission, January 2007
• “Practically Easy Landscape Maintenance: A Care Manual for Natural Drainage Systems”, Seattle Public Utilities,
2005
• “Landscape Guide for Stormwater Best Management Practice Design”, Metropolitan St Louis Sewer District, 2009
• “A Citizen’s Guide to Maintaining Stormwater Best Management Practices”, Lake County Stormwater Management
Commission, October 2004
• “Stormwater Wet Pond and Wetlands Management Guidebook”, EPA 833-B-09-001 February 2009
• Stormwater BMPs Selection, Maintenance & Monitoring, Gordon England and Stuart Stein, July 2007

27. Installation and Maintenance of Stormwater Treatment
BMPs Workshop, December 2011
Stormwater BMP Maintenance
Questions?