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Gregg Thompson at Plain Green Conference 2009 on Designing Urban Landscapes for Storm Water....

Gregg Thompson at Plain Green Conference 2009 on Designing Urban Landscapes for Storm Water.

Plain Green Conference and Marketplace is advancing sustainability in the northern plains. Learn more at http://plaingreen.org.

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    Gregg Thompson talk at Plain Green 09 Gregg Thompson talk at Plain Green 09 Presentation Transcript

    • Gregg Thompson Urban Conservation Specialist gregg@metroswcd.org Oversight and guidance: Association of Metropolitan Soil and Water Conservation Districts Anoka – Carver – Dakota – Hennepin Ramsey – Scott – Washington Additional program funding (through Contribution Agreement): U.S. Department of Agriculture Natural Resources Conservation Service
    • Gregg Thompson Urban Conservation Specialist Association of Metropolitan Soil and Water Conservation Districts Anoka – Carver – Dakota – Hennepin - Ramsey – Scott – Washington Provide education and technical assistance to 7-county metro area government units and residents in: - erosion-control & water-quality buffers - urban runoff reduction - backyard conservation - invasive species control - wildlife habitat development
    • F. J. Marschner The Original Vegetation of Minnesota info from Public Land Survey: 1847-1907
    • Oak Barrens & Openings
    • Roots of Native Prairie Plants compared to Kentucky Bluegrass (with 2-3” root depth with depth) 6-foot Depth Conservation Research Institute
    • In Graded Landscapes… - Topsoil Stripped - Compacted Sub-Soil
    • SOIL GETS COMPACTED and will not absorb water. 13 in/hr 9.8 Compacted in/hr Non-compacted 14 12 10 4” 4” 8 6 4 Non-compacted 2 Compacted 0 Sand Clay 17” 17” 17” 17” 1.4 0.2 Pitt, et al in/hr in/hr Barten, Jahnke, 2002 - Topsoil Stripped - Compacted Sub-Soil
    • Testing for Soil Compaction: SOIL COMPACTION METER Manufacturer: Dickey-John Dickey- Cost: $200 (approximate) AMSWCD
    • Source: www.dickey-john.com Testing for Soil Compaction: - Use a Soil Probe - Low-Tech: Use a wire-flag - How deep can you push it into the ground? - How much resistance? - Is the soil hard, rocky, soft, grainy?
    • How to Make Compacted Soils in 30 minutes or less: 1. Drive on it with a heavy, wheeled loader. 2. Increase effectiveness by doing this when its wet Rock-Hard “Topsoil” Layer on Sandy Subsoils
    • By Laying Sod onto Rock-Hard Soils….
    • …. We Put Turf Grass on “Life Support” to Keep It Alive
    • Where Does Our Water Come From? (in Bloomington) 376’ 376’ 963’ 963’ Source: City of Bloomington
    • 2006 Record Usage Summer Usage MILLIONS OF GALLONS (lawn- (lawn-irrigation season) Average Usage (non- (non-growing season) Source: City of Bloomington
    • Altered Watershed Effects
    • Southtown Runoff Potential in a 1” Rain Rooftops: 2,591,690 gallons Parking Lots: 5,455,595 gallons Total: 8,047,285 gallons
    • the cruel irony. Oh, Parking Lot Engineer, Why have you forsaken me?” –Fraxinus pennsylvanica Re-thinking How We Deal with Rainwater & Use Plants
    • Runoff Flows Past Dysfunctional Landscape Stormdrains Issues: -Volume of Stormwater Runoff -Quality of Stormwater Runoff (nutrients, pollutants, hot water – thermal loading) -Groundwater Usage for Irrigation on compacted soils
    • What Goes In Here…. Gunk* * Gunk= sediment, nutrients, bacteria, organic matter, oil, heavy metals, etc.
    • Franklin Pond … Gets Dumped in Here * Gunk= sediment, nutrients, bacteria, organic matter, oil, heavy metals, etc.
    • Franklin Pond More Volume Gets Dumped Quickly Creates Stream “Flash” & Lake “Bounce” - Accelerating Soil Erosion - (Sedimentation) Piped directly to Wetland, Lake or Stream
    • “Head-Cut” Head-Cut” Stream-Channel Deepening to Accommodate Volume
    • Stream-Channel Widening (following deepening) to Accommodate Volume Stream was 6’wide x 2’ deep – Now is 30’ wide x 15’ deep
    • Channel Widening to Accommodate Volume
    • pre- pre -1984 map data Source: U of M
    • Every home has a big impact on stormwater runoff ¼ Acre Lawn Residential Property Example House Lawn Driveway Stormdrain Street
    • + “Green Concrete” Compacted Lawn 8,390 s.f. “impervious” x 1” rain In a 1” rainfall (if infiltrates first ¼” of rain) ¼ Acre Potential Runoff: Residential = 3,880 gallons of runoff Property 5,422 gallons Example with 30” yearly 1,500 s.f. house (& patio) x 1” rain = 925 gallons of runoff precipitation Potential Runoff: 162,660 gallons/yr 1,000 s.f. driveway x 1” rain = 617 gallons of runoff Stormdrain Street
    • Cumulative Effect: (27) ¼-acre Lots = 146,394 gallons (1” (1” rain) Where can the rain soak in?
    • Stormwater Runoff In Our Neighborhoods:
    • Pollutants / Sediments Accumulate between Rains / Melts Map of neighborhood storm- storm -sewer system that dumps into creek. Pollutants / Sediments Accumulate between Rains / Melts
    • What Goes In Here…. Gunk* * Gunk= sediment, nutrients, bacteria, organic matter, oil, heavy metals, etc.
    • Franklin Pond … Gets Dumped in Here * Gunk= sediment, nutrients, bacteria, organic matter, oil, heavy metals, etc.
    • Causing This….. Como Lake * Gunk= sediment, nutrients, bacteria, organic matter, oil, heavy metals, etc.
    • One pound of phosphorus = 500 pounds of algae MnDNR
    • Why does a few clippings in the curb matter? Grass Clippings & Fertilizers can contain high levels of Phosphorus
    • One pound of phosphorus = 500 pounds of algae MnDNR
    • Low-Impact Development - Decreasing Amount of Runoff (Volume) - Treating Runoff at the Source (Quality) Decreasing Runoff Volume – Small-Scale Controls Small- • Bioretention / Rain Gardens • Alternative Surfaces • Strategic Grading • Reduce Impervious Surface • Site Finger Printing • Surface Roughness Technology • Conservation • Rain Barrels / Cisterns / Water Use • Flatter Wider Swales • Catch Basins / Seepage Pits • Amended Soils • Sidewalk Storage • Long Flow Paths • Vegetative Swales, Buffers & Strips • Tree / Shrub Depression • Infiltration Swales & Trenches • Turf Depression • Eliminate Curb and Gutter • Landscape Island Storage • Shoulder Vegetation • Rooftop Detention /Retention • Maximize Sheet flow • Disconnection* • Maintain Drainage Patterns • Parking Lot / Street Storage • Reforestation • Smaller Culverts, Pipes & Inlets • Pollution Prevention
    • Runoff Flows Past Dysfunctional Landscape What is my function? Stormdrains Issues: -Volume of Stormwater Runoff -Quality of Stormwater Runoff (nutrients, pollutants, hot water – thermal loading) -Groundwater Usage for Irrigation on compacted soils
    • Stormwater Runoff Garden “Bioretention” Parking Lot Rain Garden Maryland
    • Raingardens (Reduce Runoff through Stormwater Infiltration) - Shallow (4” to 12”max. deep) Depressions - Surface should be dry in 48 hours (or less) - Soil amendments sometimes needed (compost and/or sand) - Planted with deep-rooting Plants (natives work well) - Design as a Landscape Feature (“natural”, formal, or in-between) - Design to Integrate into Landscaping - Select plants to attract Wildlife (for multiple benefits)
    • Raingardens (Capturing Rainwater / Stormwater ) Just like a regular landscape planting, but able to absorb rainwater Concept - Gregg Thompson, Illustration - Taina Litwak, Animation - Ron Struss
    • What is my function?
    • Parking Lot Runoff Islands (After Spring Mowing) Microsoft Office on ‘Red River Clay’ soils Clay’ (Formerly Great Plains Software) Fargo, ND
    • Parking Lot Runoff Rain Garden Absorbtion / Infiltration / Evapo-transpiration Evapo- Microsoft Office (Formerly Great Plains Software) Fargo, ND
    • Microsoft Office (Formerly Great Plains Software) Fargo, ND
    • Infiltration Basins across Site Commercial Development Requirement Super Target Rice Creek Watershed District Lino Lakes, MN
    • Super Target Kohls Bioretention Cells Vegetated Filter Swales Runoff Reduction Practices Commercial Development Requirements Rice Creek Watershed District Super Target I-35W Lino Lakes, MN
    • Super Target Lino Lakes, MN
    • Minnetonka City Hall Raingardens Designed by: Barr Engineering Absorbs Parking Lot Runoff (Luethold , PE / Rozumalski, RLA) Luethold, Rozumalski,
    • Minnetonka City Hall Raingardens Designed by: Barr Engineering (Luethold , PE / Rozumalski, RLA) Luethold, Rozumalski, Absorbs Parking Lot Runoff
    • Minnetonka City Hall Raingardens Designed by: Barr Engineering Absorbs Parking Lot Runoff (Luethold , PE / Rozumalski, RLA) Luethold, Rozumalski,
    • Strategically-placed Raingardens Type: Street-Side Burnsville Raingardens Designed by: Barr Engineering Photo by Mike Isensee , Dakota SWCD
    • Raingardens for Neighborhood Runoff: Rushmore Drive Runoff Reduction Retrofit Project City of Burnsville Planning / Design by: Barr Engineering
    • - 5.3 acres - 25 homes Burnsville Raingardens - 17 raingardens Designed by: Barr Engineering
    • BEFORE Burnsville Raingardens Designed by: Barr Engineering
    • Burnsville Raingardens Designed by: Barr Engineering
    • Burnsville Raingardens Designed by: Barr Engineering
    • EXCAVATING, SOIL PREP & GRADING Burnsville Raingardens Designed by: Barr Engineering
    • PLANTING (By Homeowners) Burnsville Raingardens Designed by: Barr Engineering
    • Curb Cuts (for Inlet/Outlet)
    • BEFORE Burnsville Raingardens Designed by: Barr Engineering
    • 2 Years Later Burnsville Raingardens Designed by: Barr Engineering Photo by Mike Isensee , Dakota SWCD
    • City of Burnsville Raingardens (1 of 17) Rushmore Drive Designed by: Barr Engineering
    • 5.3 acres – 25 homes – 17 raingardens Rushmore Drive Runoff Reduction Retrofit Project City of Burnsville Planning / Design by: Barr Engineering
    • Source: City of Burnsville/Barr Engineering
    • Post-Construction Runoff 1.44 inches in 9June 8, 2004 hours Post-Construction Runoff - Control - Volume (14371.5 cf) Study - Volume (1164.3 cf) Rainfall (1.44 in) Source: 0.75 City of Burnsville Barr Engineering 0.50 cfs 0.25 0.00 0.075 0.050 in 0.025 0.000 6PM 9PM 9 Wed 3AM 6AM 9AM 12PM 8 TueJun 2004 6/8/2004 4:00:00 PM - 6/9/2004 12:00:00 PM
    • Before and After Burnsville Raingardens Designed by: Barr Engineering
    • Before and After Burnsville Raingardens Designed by: Barr Engineering
    • Burnsville Raingardens by Barr Engineering (Fred Rozumalkski, RLA) Rozumalkski, Winter Infiltration of Burnsville Raingardens
    • Raingarden w/ Native Sunny Perennials City of Maplewood Public Works – Street Reconstruction Project Engineering: Bonestroo
    • Raingarden w/ Shade Garden Perennials City of Maplewood Public Works – Street Reconstruction Project Engineering: Bonestroo
    • City of Maplewood Public Works – Street Reconstruction Project
    • Prior Lake Raingardens Brooks Circle Street Reconstruction
    • 5239 Brooks Circle SE 5293 Brooks Circle SE 5379 Brooks Circle SE 5405 Brooks Circle SE 5495 Brooks Circle SE 16425 Itasca Ave SE 16447 Itasca Ave SE 16448 Itasca Ave SE Prior Lake Raingardens Brooks Circle Street Reconstruction
    • Prior Lake Raingardens City of Prior Lake Brooks Circle Street Reconstruction
    • Prior Lake Raingardens AMSWCD Brooks Circle Street Reconstruction
    • Prior Lake Raingardens AMSWCD Brooks Circle Street Reconstruction
    • Prior Lake Raingardens Brooks Circle Street Reconstruction
    • Green Street Project Raingardens Portland, Oregon Design by: Kevin Robert Perry, ASLA
    • Green Street Project Raingardens Portland, Oregon Design by: Kevin Robert Perry, ASLA
    • Green Street Project Raingardens Portland, Oregon Design by: Kevin Robert Perry, ASLA
    • Green Street Project Raingardens Portland, Oregon Design by: Kevin Robert Perry, ASLA
    • City of Seattle Public Works – Street Reconstruction Project
    • Seattle
    • University of Minnesota St. Paul Campus – Watershed District Project Designed by: Barr Engineering / Fred Rozumalski
    • Black Ornamental Chokeberry Grass Gro- Gro-Low Sumac University of Minnesota St. Paul Campus – Watershed District Project Designed by: Barr Engineering / Fred Rozumalski
    • Soil Replacement Area 9371 Ditch Retrofit Project Chanhassen, MN
    • Over-Excavation Area 9371 Ditch Retrofit Project Chanhassen, MN
    • Check Dam Soil Replacement (Sand & Compost Mix) 9371 Ditch Retrofit Project Chanhassen, MN
    • Shredded Wood Mulch To be planted in Spring 2008, 9371 by residents Ditch Retrofit Project Chanhassen, MN
    • 9371 Ditch Retrofit Project Chanhassen, MN Planting Day (with neighborhood residents): April 28, 2008
    • 9371 Ditch Retrofit Project Chanhassen, MN Three Months After Planting: July 2008
    • Utility Locates
    • U More Park 2008 Dakota SWCD
    • Ag Hall Large Parking Lot Depression / Mowed Lawn Inlet (Concrete Swale) (Purpose?) Stormdrain
    • Inlet (Concrete Swale) Ag Hall Bioretention Basin Large Parking Lot Riser on Stormdrain
    • 300 gallons in 1” rainfall Flows across lawn to Plymouth street’s storm-drain
    • Inlet Overflow (swale) (across lawn) raingarden berm Digging the Raingarden Over-Dig & Amend Soil (if needed) Plymouth
    • Sources: -Recycling Centers -Garden Centers / Landscape Contractors Add Organic Matter to Soils Leaf Compost (well-aged) LEAF COMPOST (Well-Aged) (Well- Reintroduces / Adds Organic Matter to Soil – Improves Soil Structure (Decreases Bulk Density, Increases Water Holding Capacity, Increases Infiltration) Increases AMSWCD
    • Berm (w/ erosion- Depression control blanket) (w/ compost) Hold the Berm in Place Plymouth Use Erosion-Control Blanket (if needed)
    • Plant Considerations: -Soils -Moisture -Sunlight Planting the Raingarden Plymouth Choose the Right Plant for the Right Place
    • Materials : -0.5 cy Compost -0.5 cy Mulch -18 Blue Flag Iris (3” pots) (3” -48 Pussytoes (Plugs) Blue Flag Iris Pussytoes Year 2 Plymouth
    • www.BlueThumb.org
    • The Blue Thumb Guide to Raingardens is available at... Amazon.com (online) Bachman’ Bachman’s (in store) Landscape Alternatives (in store) Minnesota State Horticultural Society (in store) Minnesota Landscape Arboretum (in store) Mother Earth Garden’s (in store) Garden’ Prairie Restorations (in store) Terrace Horticultural Books (online and in store) Organizations interested in wholesale or large volume orders: Waterdrop Innovations LLC at raingardens@yahoo.com. raingardens@yahoo.com.
    • Wisconsin DNR & UWEX - Raingarden ‘How-To’ Manual
    • Wisconsin DNR & UWEX - Raingarden ‘How-To’ Manual
    • Plant Supplier / Consultant: Natural Shore Technologies
    • POTENTIAL Measure Drainage Areas RAINGARDEN LOCATIONS Raingarden Size 325 s.f. 325 s.f. Needed = = 200 gal = 200 gal 8-15% Size of Drainage Area 455 s.f. = 282 gal 140 s.f. = 86 gal 220 s.f. Size ultimately = 136 gal dependent on 1,000 s.f. soil types & = 618 gal compaction present Stormdrain Street
    • Water-Smart Landscaping • Reduce Soil Compaction (aerate / add organic matter / mulching) • 3” Mow Height (promotes deeper root growth, reduces moisture loss) • Turf grass Selection (Drought-tolerant / deep-rooted selections) (Drought- deep- • Smarter-Watering – Utilize low-volume drip-irrigation / targeted / rain-sensors, etc. low- drip- rain- • Rainwater Harvesting – Rainbarrels / Cisterns & Pumps (to re-use rainwater) re- • Low Water-Use Landscapes – Utilize Deep-Rooted Plants Deep- – Selecting ‘Right Plant for the Right Place ’ Place’ • Rainwater-Absorbing Landscapes – Permeable Hardscapes (patios, driveways, etc.) – Strategically-placed tree, shrub and perennial planting areas Strategically- – Vegetated-Filter Swales (when moving water) Vegetated- – Raingardens (to really soak it in)
    • Low-Impact Development - Decreasing Amount of Runoff (Volume) - Treating Runoff at the Source (Quality) Decreasing Runoff Volume – Small-Scale Controls Small- • Bioretention / Rain Gardens • Alternative Surfaces • Strategic Grading • Reduce Impervious Surface • Site Finger Printing • Surface Roughness Technology • Conservation • Rain Barrels / Cisterns / Water Use • Flatter Wider Swales • Catch Basins / Seepage Pits • Amended Soils • Sidewalk Storage • Long Flow Paths • Vegetative Swales, Buffers & Strips • Tree / Shrub Depression • Infiltration Swales & Trenches • Turf Depression • Eliminate Curb and Gutter • Landscape Island Storage • Shoulder Vegetation • Rooftop Detention /Retention • Maximize Sheet flow • Disconnection* • Maintain Drainage Patterns • Parking Lot / Street Storage • Reforestation • Smaller Culverts, Pipes & Inlets • Pollution Prevention
    • Testing for Soil Compaction: - Low-Tech: Use a wire-flag - How deep can you push it into the ground? - Is it hard, rocky, soft, grainy? SOIL COMPACTION METER Manufacturer: Dickey-John Dickey- Cost: $200 (approximate) AMSWCD
    • Sources: -Recycling Centers -Garden Centers / Landscape Contractors Add Organic Matter to Soils Leaf Compost (well-aged) LEAF COMPOST (Well-Aged) (Well- Reintroduces / Adds Organic Matter to Soil – Improves Soil Structure (Decreases Bulk Density, Increases Water Holding Capacity, Increases Infiltration) Increases AMSWCD
    • Add Organic Matter to Soils (Blower Service) Twin Cities Specialty Companies: -Valley Creek Express Blower Service Johnsonville, Iowa -Windscapes Iowa NRCS (photo source)
    • Reduce Soil Compaction for Healthier Lawns Core-Plug Lawn Aerator Available through: - Lawn Service - Equipment Rental (DIY) Best Time to Aerate: 1) Sept 1 – 30 Important: Locate / 2) May 1 – June 15 Flag any shallow buried wires or Optional: “Topdress” with compost irrigation heads
    • Core-Plug Lawn Aerator
    • Reduce Soil Compaction for Healthier Lawns Sub-Soil Ripper on “open sites” Boxer Aero-vator First Products Aero-vator
    • www.Bobcat.com
    • www.attachmentsintl.com Bucket Ripper Bucket Ripper www.larsonripper.com Frost Ripper “ FROST RIPPERS” RIPPERS” www.leadingedgeattachments.com Leading Edge Attachments www.vailproducts.com
    • www.leadingedgeattachments.com “ FROST RIPPERS” RIPPERS” Leading Edge Attachments
    • When Conveying Runoff: Drawing: Doug Adamson RDG Planning & Design Source: NRCS-Iowa
    • Short- Short-mown Lawn- Lawn-Grass in Swale -Short-mown Lawn Grass will not substantially slow sediment-laden stormwater runoff. Short- sediment- -Friction is needed to slow water and drop-out sediments (and attached nutrients). drop- -Friction can be achieved with stiff-stemmed vegetation. stiff- USACE Chicago District
    • -Short-mown Lawn Grass will not substantially slow sediment-laden stormwater runoff. Short- sediment- -Friction is needed to slow water and drop-out sediments (and attached nutrients). drop- -Friction can be achieved with stiff-stemmed vegetation. stiff- -These plantings can also provide wildlife habitat. Vegetated Swale USACE Chicago District
    • Bio-Swale for stormwater conveyance with infiltration USACE Chicago District
    • Bio-Swale for stormwater conveyance with infiltration USACE Chicago District
    • Prairie Plugging Prairie No- No-Mow Native Lawn Mix Seeding Trees & Shrubs Swale of Sweet Grass (for stormwater conveyance) Summer 2006
    • Centex Homes Development Vegetated Bio-Swale Facility Dakota SWCD Burnsville, MN Jay Riggs
    • Centex Homes Development Vegetated Bio-Swale Facility Dakota SWCD Burnsville, MN Jay Riggs
    • Pearlmont Heights Development Vegetated Bio-Swale Facility Eagan, MN
    • Have a wet area often too soggy to mow? PLANT IT Pick the ‘Right Plants for the Right Place’ Place’
    • Good Location for Multi-Function Landscaping
    • Where Can You Intercept & Utilize Rain?
    • “If you never walk on it…. then why are you mowing it?” Grandpa Thompson
    • No Mow Lawn Mix (blend of fine fescues) Great for Sand or Clay Prairie Nursery www.prairienursery.com
    • No Mow Lawn Mix (blend of fine fescues)
    • Consider Native Grasses for the Lawn Native Turfgrass Demonstration McCrory Gardens – SDSU / Brookings AMSWCD
    • Consider Native Grasses for the Lawn Drought -Tolerant Lawn Blue Grama Prairie Restorations, Inc.
    • Tall- Tall-grass Prairie Short- Short-grass Prairie Chanhassen Residence By: Prairie Restorations Multi-Function Landscapes Screening, Habitat Value, Runoff Reduction, Water Conservation Planted 20 years ago on heavy clay soils (now has infiltration rates like sand) rates
    • Chanhassen Residence By: Prairie Restorations Multi-Function Landscapes AMSWCD Screening, Habitat Value, Runoff Reduction, Water Conservation
    • Chanhassen Residence By: Prairie Restorations Multi-Function Landscapes AMSWCD Screening, Habitat Value, Runoff Reduction, Water Conservation
    • Low Water-Use Landscapes Water Conservation, Runoff Reduction, Habitat Value Designed and Installed by: Energyscapes
    • Mosquito – Proof Inlets 55 gallons each Harvest Rainwater with Rainbarrels Anoka Conservation District
    • Inlet (Atrium Grate) Outlet Inlet Filter Overflow Build Your Own Rainbarrel AMSWCD
    • Harvest Rainwater with Rainbarrels
    • Where to Put a Rainbarrel? Your Smallest Area of Roof Rainbarrels typically only hold 50 gallons. They will quickly fill in 325 s.f. 325 s.f. a rainstorm. = 200 gallons = 200 gal - Is overflow sized large enough to pass 455 s.f. through this additional 140 s.f. 1” Rain water? = 282 gal = 86 gal Runoff Volumes 220 s.f. (by roof area) –When they fill up, = 136 gal where will they Note: 1 cubic foot = overflow to? 7.4 gallons Stormdrain Street
    • Capture Rainwater with Cisterns
    • Capture Rainwater with Cisterns Above-ground Buried 500 – 1,500 gallon Tanks w/ Filters & Pump 3P Technik Australia www. 3ptechnik.com.au Can Re- use as Lawn Irrigation Re-
    • Wal-Mart Chipotle
    • Water Harvesting with Cisterns Cistern 30,000 gallon storage Source: Target Corporation
    • Drawing: Doug Adamson RDG Planning & Design Source: NRCS-Iowa
    • Permeable Pavers ‘Turf Block’ Block’ Detroit Lakes, MN AMSWCD Permeable Surfaces
    • Permeable Pavers ‘Turf Block’ Block’ Detroit Lakes, MN AMSWCD Permeable Surfaces
    • Permeable- Permeable -joint Pavers ‘Eco-Stone’ (Borgert) Eco-Stone’ Borgert) AMSWCD
    • Permeable- Permeable -joint Pavers ‘Eco-Stone’ (Borgert) Eco-Stone’ Borgert) Dakota County
    • Permeable- Permeable -joint Pavers ‘Eco-Stone’ Eco-Stone ’ Schmeltz Volkswagen Hwy 36 & White Bear Ave Maplewood Ramsey-Washington Metro Watershed District Project
    • Permeable Asphalt Ramsey-Wash. Metro W.D. Little Canada, Mn
    • Green Roof Permeable Asphalt Ramsey-Wash. Metro W.D. Little Canada, Mn
    • Permeable Concrete Powers Lake Park (2005) Woodbury, Mn
    • Permeable Concrete Powers Lake Park (2005) Woodbury, Mn
    • RESOURCES
    • http://www.pca.state.mn.us/water/stormwater/stormwater-manual.html
    • http://efotg.nrcs.usda.gov/treemenuFS.aspx
    • www.ndwrcdp.org/publications/ www.ndwrcdp.org/publications/
    • Lessons Learned: -Cell Sizing (depth, watershed ratio) -Off-Line Design (preferable to on-line) Off- on- -Inlet Design (5’ wide, 12% backslope, turf filter) (5’ backslope, -Under-drain (with valve or removable cap) Under- -Soil Mixture (Sand & Compost – no topsoil) -Installation (avoiding compaction & sediment) -Vegetation Selection (deep-rooted plants) (deep- -Maintenance Issues (removing sediment & weeding) www.ndwrcdp.org/publications/ www.ndwrcdp.org/publications/
    • Download at: http://dnr.wi.gov/runoff/stormwater/technote.htm
    • http://www.pca.state.mn.us/publications/ http://www.greatrivergreening.org/ manuals/stormwaterplants.html
    • Subscribe at: http://www.stormh2o.com/ Subscribe at: http://www.erosioncontrol.com http://www.erosioncontrol.com
    • http://www.cwp.org/
    • What if ?
    • Gregg Thompson Urban Conservation Specialist gregg@metroswcd.org Oversight and guidance: Association of Metropolitan Soil and Water Conservation Districts Anoka – Carver – Dakota – Hennepin Ramsey – Scott – Washington Additional program funding (through Contribution Agreement): U.S. Department of Agriculture Natural Resources Conservation Service