Gulf Coast Green 2012 Margaret Robinson

Low Impact DevelopmentIn the Houston RegionPerspectives: Design Margaret Robinson Asakura Robinson Co. Construction David Batts Construction Eco Services Agency Nick Russo Harris County Public Infrastructure Dept. Landscape Architecture Urban Design Planning

Houston Land Water Sustainability Forum (HLWSF)OBJECTIVES: Explore land/water related practices, methods, technologies and materials which may provide economic benefit and improve quality of life in the greater Houston area. To weight our focus on practical applications rather than theoretical concepts. To promote the implementation of practices that protect our land and water resources. To engage the broadest possible range of constituencies, including public agencies, in order to facilitate and speed adoption of practices. To track the progress of adoption and implementation of sustainable land/water practices Bob Adair-Steering Committee Chair, International Erosion Control Association (SCIECA) US Green Building Council (USGBC) American Society of Civil Engineers (ASCE), Houston Council of Engineering Companies (HCEC) American Society of Landscape Architects (ASLA), American Institute of Architects, Houston (AIA) Associated General Contractors of America (AGC), Greater Houston Builders Association (GHBA) Houston-Galveston Area Council (H-GAC) Harris County Public Infrastructure Dept., Harris County Flood Control District (HCFCD) City of Houston, Public Works, Engineering and Code Enforcement Departments Texas Department of Transportation (TXDOT) Bayou Preservation Association (BPA) Energy Corridor District Texas Coastal Watershed Program

LID-low impact development – what is it?LID is an approach to land development that works with nature tomanage stormwater as close to its source as possible.LID employs principles such as preserving and recreating naturallandscape features, minimizing imperviousness to create functionaland appealing site drainage that treats stormwater as a resource ratherthan a waste product.There are many practices that have been used to adhere to these Westpark Tollwayprinciples such as bioretention facilities (bioswales), vegetated swales,rain gardens, vegetated rooftops (greenroofs), rain barrels, tanks andcisterns, and permeable pavements.LID Works EverywhereLID can be applied to new development, redevelopment, or as retrofitsto existing development. LID has been adapted to a range of land usesfrom high density ultra-urban settings to low density development.LID and Green Infrastructure Citation CampusEPA intends the term "green infrastructure" to generally refer tosystems and practices that use or mimic natural processes to infiltrate,evapotranspirate or reuse stormwater or runoff on the site where it isgenerated.http://www.epa.gov/owow/NPS/lid/ Gene Green Park

LID-benefits Filters stormwater through plants /engineered soil mixes- removes 80%+ pollutants, total suspended solids (TSS) and heavy metals Diverts floatable trash from stormwater systems, bayous, lakes Horn Elementary Provides detention volume within media, swales, reservoirs Bioswales may reduce drainage system costs by up to 30% Captures rainwater for use as a resource rather than discarded as a waste product Adds landscape area Creates wildlife and native plant habitat Dickenson Library Contributes to LEED, Sustainable Sites, Green Roadway and Living Building Challenge point systems Encourages coordination between Engineers, Hydrologists, Landscape Architects, Architects, Contractors, Maintenance Programs, Clients Meador Library

LID projects-constructed2009 Gene Green Park Harris County Precinct 22009 Kendall Library City of Houston, English Assoc. Arch.2009 Federal Reserve Bank-Bioswales2009 Houston Arboretum2009 Inverness Residence Strasser Ragni Arch.2010 Meador Library Harris County Precinct 2, English Assoc. Arch.2010 Firestation 90 City of Houston, English Assoc. Arch2010 Lonestar College Conroe Campus2010 Westside Senior Educ. Center Harris County Precinct 3, BNIM2010 Westchase Drainage Corridor Westchase Manage. District2010 New Hope Housing, Sakowitz Val Glitsch Arch.2011 Horn Elementary School HISD, English Assoc. Arch.2011 Lonestar College Atascocita Campus2011 Lonestar College Victory Center2011 Dickenson Library Rain Garden TX AgriLife2011 Peck Elementary School Taft Architects2011 Federal Reserve Bank-Green Roof2011 DeChaumes Elementary HISD, ArcTec Assoc.

LID projects-in design/construction2012 Bagby St. Reconstruction Midtown Manag. Dist., WPMoore Eng.2012 New Hope Housing, Rittenhouse Glassman Shoemake Maldonado Arch.2012 Sherwood Forest Montessori English Assoc. Arch.2012 McKenzie Park Subdivision Peron Dev.2012 SARA Stormwater Audit URS2012 MD Anderson Park Vaughn Construction2012 Carnegie Vanguard High School HISD, Rey de la Reza Architects2012 Brazoria County Parks: Quintana Beach Resoft, Mohawk and Follet’s Island2012 Lockhart-Turner Elementary HISD, Harrison Kornberg Arch.2013 N. Main St., Harris County Pct. 2 Dannenbaum Eng.2013 TAMU Joint Library Facility Harrison Kornberg Arch.2013 Mandell Park Houston Parks Board, Friends of Mandell Park2014 Memorial Running Center MPC, Kirksey Arch.2014 Almeda Blvd. Reconstruction City of Houston, TXDOT, WPMoore Eng.2014 Springwoods Village, Dr. Cor. Coventry Dev., Design Workshop, WPM2014 Historic Holman Street Recons. OST Almeda TIRZ2014 Halls & Inwood Detention Basins COH, WPM/Dodson

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement 1919 DECATUR STREET Raingarden (Bioretention Cells)

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement FEDERAL RESERVE HOUSTON Bioswale

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement MEADOR LIBRARY Bioswale with Underground Rain Tank

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement GENE GREEN PARK Bioswale

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement LONESTAR COLLEGE ATASCOCITA Raingarden (Bioretention Cells)

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement LONESTAR COLLEGE ATASCACITA Bioswale

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement PECK ELEMENTARY Bioswale

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement L. Coffman Bioswale

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement McKenzie Park Bioswales

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement RESIDENCE IN HOUSTON Green Roof

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement FEDERAL RESERVE HOUSTON Green Roof

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement FIRESTATION 90 Cisterns

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement BAKER RIPLEY CENTER Cisterns

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement NEW HOPE HOUSING SAKOWITZ Cisterns

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement HOUSTON ARBORETUM Cisterns

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement KEMPWOOD MANOR Permeable Pavement - Pavers

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement KEMPWOOD MANOR. Permeable Pavement - Pavers

The LID ToolboxBioswales / RaingardensGreen RoofsCisterns / TanksPermeable Pavement FIRESTATION 90 Permeable Pavement - Concrete

LEED PointsSustainable SitesWater EfficiencyInnovation inDesign 12+ Points Available Using LID Techniques

LID in LEED Same LID solution works for: • SS 6.1: Stormwater Design – Quality ControlCan be applied to12+ points • SS 6.2: Stormwater Design – Quantity ControlUnderutilized • SS 7.1: Heat Island Effect – Non-roof • WE 1: Water Efficient Landscaping Low maintenance does not mean NO maintenance – use LID to augment irrigation.

Economics Drives Ecology in Today’s Business EnvironmentSelling Low Impact Development on Economics What Are The Existing Costs? – Opportunity Costs – Real Estate for Detention Systems – Upfront System Costs – Storm Sewer & Water Quality Systems – Long-term Maintenance Costs What Opportunities Exist? – How can we use drainage as an amenity? – How can we increase property values? – How can we create a better sense of place?

Cost DistributionTraditional Site Design Vs. Low Impact Development Site Site Furnishings Drainage Furnishings Hardscapes Design Svs Design Svs $$$$$$$ Softscapes Hardscapes Softscapes

Queenston ManorProving the Opportunity LID Affords Developers Typical detention storage 7 residential buildings 7.4 acres

Queenston ManorProving the Opportunity LID Affords Developers LID design spreads drainage throughout site as an amenity Redesign yielded 2 additional buildings 48 more apartment units

Queenston ManorProving the Opportunity LID Affords Developers

Lessons LearnedThe System is Greater Than the Sum of It’s Parts Media Performance is the Critical Component Eliminate Choke Points in the Media Section Match Underdrain to Media Protect the System

Media PerformanceA Better Understanding of NatureUnderstanding Media Performance Will Improve System FunctionalityVerifying Performance Will Insure Long Term Functionality

Choke PointsFabrics are the Achilles Heel of LIDBridge Media With Aggregate / Do Not Separate Media From AggregateRequire Bridging Analysis in Specifications Engineered Media - 12” – 48” 70% Sand - 25% Organic or Inorganic - >5% Silt / Clay / Fines 3” – 6” Intermediate Layer - Fine Gravel 2mm – 4mm 12” – 60” Drainage Layer - Pea Gravel 1/4” – 3/8”

Systems Parts Must Match PerformanceUnderdrain Flow Must Match Media FlowPerforated Pipe Has 2” of Orifice Opening Per Linear FootFor High Flow Soils, Look To Higher Performing Underdrain Systems

Protect The SystemGood Designs Are Compromised if Proper Protection is NeglectedStabilize the Side Slopes ASAP / Do Not Wait For Construction to CommencerProtect the Soils During Construction / An Ounce or Prevention is Worth a Gallon of Cure

Installation of Biofiltration SystemCopper State Rubber

developing LID criteria Adopted April 2011 Only County in TX with LID criteria. Optional, not every project must be LID. YOU MUST HAVE A PRE-PROJECT MEETING

developing LID criteria Stakeholder review & public interest County interest Alternative designs, tools, BMPs Storm water management (quantity & quality) EPA Requirements TCEQ MUD re-imbursements Expect criteria to allow for MUD reimbursement for LID projects

storm water quality Increased treatment, similar to LEED. Treatment of the 1” Water quality volume. Although not specified, we believe the LID practices will generally result in 80% TSS removal. All LID based projects >1acre receive a SWQ permit.

engineered soil media Treat the first 1” of runoff volume Safety factor of 2. actual design capacity of the soil is to be 60”/hr to meet the 30”/hr criteria with safety factor. In situ test (see Appendix B).

development considerations Specific considerations for development types: Public Streets Commercial Developments Subdivisions Ownership & Maintenance. Safety cannot be compromised. Safe conveyance of the 100 year event.

LID projects We’re gaining experience in LID projects, similar to our LEED experience. Past projects: Evelyn Meador Library, Gene Greene Park Roadways: Birnamwood Dr. – (under construction) N. Main – (in design) A 3rd, (under evaluation).

Birnamwood drive – HC Pct 4 East of I-45, North of Cypresswood. Road leads to Pct 4’s John Pundt Park & Spring Creek Greenway. First LID-road project in our region.

Birnamwood drive LID roadway section Floodplain mitigation

Birnamwood Drive & False inlets. Curb Storm Sewer at outfalls only.32 ft median.native plants, trees,grasses.

Planting plan Engineered Soils

Clearing: August 2011

BioswaleSeptember 2011

BioswaleOctober 2011

BioswaleJanuary 13 2012

April 03 2012

Bioswale Engineered SoilsApril 24 2012

final design components

Planning considerations Consider the project goal Evaluate project costs Visualize the landscape plan Determine vegetation establishment

our first experience Eliminated offsite detention; reduced our floodplain mitigation pond. -Reduced wetland impact. –SWQ treatment. Saved ROW cost. Saved cost of Storm sewer. Reduced mowing to 1-2x/year. Enhanced landscaping, warranty, irrigation. Gained aesthetic benefit (road to Park). Utilized 2 Bid packages (road & landscape). Still evaluating all costs as we move through construction (SWPPP, Extra work items, plants). Next time- evaluate landscaping and seeding, single bid package

resourceswww.houstonlwsforum.orgHouston Land/Water Sustainability Forumwww.TexasLID.orga centralized, accessible resource for important information and guidelines foreffectively implementing Low Impact Development (LID), or Green Infrastructure,practices and policies across Texas. The website is collaborative effort between: Lady Bird Johnson Wildflower Center, Ecosystem Design Group The Center for Research in Water Resources, University of Texas at Austin The Texas Commission on Environmental Quality (TCEQ)www.asla.orgBanking on Green: A Look at How Green Infrastructure Can Save MunicipalitiesMoney and Provide Economic Benefits Community-wide. Joint report by AmericanRivers, the Water Environment Federation, and the American Society of LandscapeArchitects and ECO Northwest – April 2012

Gulf Coast Green 2012 Margaret Robinson

by juliekannai on May 25, 2012

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Gulf Coast Green 2012 Margaret Robinson Presentation Transcript