380 likes | 543 Views
KEEP IT CLEAN PARTNERSHIP Low Impact Development (LID) Checklist & Barriers Analysis Andrew Earles, Jane Clary, and Derek Rapp Wright Water Engineers, Inc. & Janice Lopitz, Keep it Clean Partnership. Scope of Work. Questionnaire/ barrier identification Develop Review Checklist
E N D
KEEP IT CLEAN PARTNERSHIPLow Impact Development (LID) Checklist & Barriers AnalysisAndrew Earles, Jane Clary, and Derek RappWright Water Engineers, Inc.&Janice Lopitz, Keep it Clean Partnership
Scope of Work • Questionnaire/ barrier identification • Develop Review Checklist • Development Plan Review • Report/White Paper • Timeframe: March – December 2008
Types of LID Barriers • Physical • Institutional • Barriers for municipalities • Barriers for engineers • Barriers for the public
“Laundry List” of LID Barriers • Fear of liability (engineers, owners, reviewers approving design) • Reluctance to try something new/lack of demonstration projects • Lack of education and training • Lack of common nomenclature (rain garden versus porous landscape detention)
“Laundry List” of LID Barriers (Cont.) • Limited design examples/good technical documentation • Costs—design, construction, operation and maintenance, life cycle • Safety concerns • Public perception
“Laundry List” of LID Barriers (Cont.) • LID not integrated early in planning process • Guidance versus requirements • Compatibility with existing developments • Water rights (cisterns/rainwater harvesting)
“Laundry List” of LID Barriers (Cont.) • Potential for mixed messages from government (different departments) • No clear economic incentive for using LID • Difficulty in measuring benefits of LID • Semi-arid area hydrology
“Laundry List” of LID Barriers (Cont.) • Maintenance and durability • Long term ownership • Standing water “nuisance” problems • Fear of lengthening review process
“Laundry List” of LID Barriers (Cont.) • Conflicts with municipal code requirements • American Disabilities Act considerations • Poorly drained soils • High groundwater table
“Laundry List” of LID Barriers (Cont.) • Expansive soils & construction defect lawsuits • Other water quality alternatives are “easier” • LID does not altogether eliminate need for other types of BMPs and drainage infrastructure • HOA or covenant restrictions
“Laundry List” of LID Barriers (Cont.) • Different guidance/criteria from different groups (CWP versus UDFCD versus others) • Examples of LID failures • Conflicts with landscaping requirements
Development Reviews 3 Sites selected: • Boulder—Redevelopment Project—Boulder Manor • Longmont—”Big Box” Commercial Development—Sandstone Marketplace • Erie—Residential Development—Redtail Ranch
Development Reviews (Cont.) • Level of Detail • “Big Picture” • Identify general LID measures that could potentially have been implemented • Phone interviews with engineers, owners (if available to participate) and local reviewers • Review focused on overall site plan (grading and drainage sheets) • Assume hydrology/ calculations are correct • Overall goal: Identify LID measures feasible for site and, if not incorporated in design, why not
White Paper • Present LID checklist • Provide summary of each development review case • Identify most common LID barriers • Develop conceptual strategies for addressing/overcoming most common barriers to LID implementation • How will white paper be used by KICP? • Public education for developers, municipal staff • Basis to seek additional funding for further study of strategies to overcome barriers • Publication in scientific/engineering literature
Regional Opportunities Related to LID • UDFCD Volume 3 BMP Manual Update • Model LID chapter • Emphasis on managing stormwater at the source and volume reduction • Expanded BMPs • Comment meeting Sept 25 at UDFCD
Other Local Resources:Denver Water Quality Management PlanBMP Implementation Guidelines
National LID Opportunities • International Stormwater BMP Database Expansion (www.bmpdatabase.org) • Reclassification of LID studies (fall 2008) • Better inclusion of LID • Update of Monitoring Manual to include LID (fall 2008)
Representative LID studies already included: • Urban Drainage and Flood Control District (Urbonas) • University of New Hampshire Studies (Ballestero/Roseen/Leonard/Houle) • Villanova Urban Stormwater Partnership (Traver) • North Carolina State (Hunt) • Portland, OR (Liptan)
New GreenCO BMP Manual • Contains 39 BMPs to: • reduce landscape water use • protect water quality • promote sustainable landscaping • New additions include “Role of Landscaping in Low Impact Development” • Now available on CD/hard copy (by download in the near future) • Contacts: Jane Clary, WWE Brenda O’Brien, GreenCO
Questions? • On KICP project: • Andrew Earles, WWE (aearles@wrightwater.com) • Janice Lopitz, City of Boulder • BMP Database project: • Jane Clary, WWE (clary@wrightwater.com) • UDFCD Volume 3 Update: • Michelle Delaria or Ken Mackenzie, UDFCD • (mdelaria@udfcd.org or kam@udfcd.org)