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Maintenance of Rain Gardens, Swales, and Stormwater Planters . Photo: EMSWCD. OLCA Expo December 1, 2011. Partners. Candace Stoughton EMSWCD Gail Shaloum Clackamas WES Rob Emanuel Clean Water Services Damon Richardson Pacific Sports Turf Henry Stevens Portland BES
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Maintenance of Rain Gardens, Swales, and Stormwater Planters Photo: EMSWCD OLCA Expo December 1, 2011
Partners Candace Stoughton EMSWCD Gail Shaloum Clackamas WES Rob Emanuel Clean Water Services Damon Richardson Pacific Sports Turf Henry Stevens Portland BES Maria Cahill Green Girl Land Development
Agenda • What is stormwater? Why manage it? • Legal issues • Role for landscape contractors • Types of facilities • Maintenance activities • Vegetation • Pests • Irrigation • Soils/Mulch • Structures • Erosion Control • Spills • Take home messages
What is Stormwater? Rainfall and snowmelt that runs off instead of seeping into the ground. Photo: morgueFile
Sources of stormwater? Roofs Driveways Rainfall and snowmelt that runs off instead of seeping into the ground. EMSWCD EMSWCD Streets Parking Lots morgueFile Green Girl Land Development
Stormwater Can cause unnatural flooding East Portland News
Stormwater Can degrade streams Photo: morgueFile Johnson Creek Watershed Council Photo: East Portland News
Stormwater Carries pollutants to waterways morgueFile
Rain garden-municipal Photo: EMSWCD EMSWCD Planted landscape facility designed to collect and absorb runoff and filter out pollutants.
Swales (aka bioswales) Long, planted, open channel that carries, slows stormwater and filters out pollutants. EMSWCD
Rain garden-residential EMSWCD Planted landscape facility designed to collect and absorb runoff and filter out pollutants.
Stormwater planter Structural landscape reservoir designed to filter out pollutants, and in some cases, infiltrate stormwater. EMSWCD
Anatomy-Infiltration planter Graphic: Clean Water Services, LIDA Manual
Anatomy-Flow through planter Graphic: Clean Water Services, LIDA Manual
What is involved? • Facilities need inspection and maintenance (annually, or more) • Maintenance includes: • hydrologic and water quality function • landscape functions • impacts on human health and safety EMSWCD
Business opportunity Specialized training to design, inspect and maintain • Landscape Architects • Civil Engineers • Landscape Designers • Landscape Contractors • Green industry professionals P • Example: • City of Portland • 9000 stormwater facilities • ≈ ¼ are LID facilities Metro
Inspection log • Each jurisdiction will have • different requirements for • inspections, reporting, etc.
General observations Before you go… • O & M plan or manual • As-built or design report • Locations of inlets/outlets, plantings, irrigation, historical problems, previous observations Clackamas County Water Environment Service
General observations Once you arrive… • Current and recent weather conditions? • Last rain event? • Inlets and outlets clear? • Banks stable? • Draining as designed or short-cutting? • Pavement in good condition? • Animal damage? • Can you access? • Steep or uneven terrain? • People entering/cutting through the facility?
Contributing area • Trash • Leaves • Oily • Gravel • Sediment • Street or parking lot sweeping • Fertilizer or pesticide use • Other activities going on upstream
Contributing area Clackamas County Water Environment Services
Contributing area Clackamas County Water Environment Services Clean Water Services
Safety and access Access • Need to have access • Flat or evenly sloped • If fenced, trim fenceline for 3 feet if space allows • Consider safety before you begin (do not enter flooded facility) Pacific Sports Turf
Safety and access Metro morgueFile Clackamas County Water Environment Services
Safety and access Personal Protective Equipment (PPE) • Sturdy boots • Gloves, puncture resistant gloves • Ear plugs/earmuffs if operating power equipment • Eye protection when “weed wacking” or mechanical trimming, handling large branches • Long sleeved shirts and pants • Hard hat if cutting overhead Clackamas County Water Environment Services 35
Safety and access Other Equipment • Rakes: to clean out under shrubs where you can’t see • Grabbers: for trash, sharp objects, or needles • First aid kit EMSWCD EMSWCD morgueFile
Safety and access Public Safety • Vehicle entrances/exits • Where people walk through, create a path OSU Extension Clean Water Services
Trash Metro • Remove trash to prevent clogging and contamination
Functions • Moving • Appearances • Pests • Irrigation O&M tasks related to vegetation
vegetation can be part of the solution……vegetation can be part of the problem.…..…
Planting plans Oregon Rain Garden Guide
Aesthetics OSU Sea Grant
Aesthetics Clean Water Services
Aesthetics vs function Clean Water Services
Keeping things moving morgueFile
Keeping things moving EMSWCD
Inlets Clean Water Services
Inlets Clean Water Services
Shade and competition Clean Water Services
What would you do? Clean Water Services
Aesthetics Clean Water Services
Aesthetics EMSWCD
Do’s and Don’ts for Plants • Do strive to keep good plant cover in a WQF • Do pay attention to facility design • Do replace dead plants promptly • Don’t overly trim grasses and grass-like plants • Don’t let plants block water flow
keeping pests at bay morgueFile morgueFile
Principles of IPM • Start with healthy plants • Monitor and identify pests • Be tolerant of some damage • Choose the least toxic control first • Combine techniques