LID Techniques in Roadway Designs - Rice...
22
LID Techniques in Roadway Designs Nick Russo Environmental Team Leader HCPID Architecture & Engineering Division
Transcript of LID Techniques in Roadway Designs - Rice...
LID Techniques in Roadway Designs
Nick Russo Environmental Team LeaderHCPID Architecture & Engineering Division
Agenda
LID / Green Infrastructure Projects in the works Birnamwood Drive Case Study
LID Projects
Criteria Adopted 2011 Monitor LID effectiveness Evaluate Criteria Improve vegetation establishment Future EPA Requirements Local groups working with TCEQ to
allow MUD re‐imbursement for LID projects.
Holzworth Rd @ Spring Steubner – HC PCT 4
N. Main and Sjolander –HC PCT 2
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 – HC Pct 4
Birnamwood drive
Floodplain mitigation
LID roadway section
Engineered Soils
Planting plan & Seed mixes
Clearing: August 2011
September 2011
Bioswale
January 13 2012
Bioswale
April 03 2012
Engineered Soil
April 24 2012
Bioswale
Engineered Soil
June 8 2012
July 25 2012
October 3 2012
Re‐seeding & establishment
October 16 2012
Total Project Cost = $ 2.6 millionCost Savings compared to the traditional roadway: Eliminated offsite detention. Reduced our floodplain mitigation pond. Reduced wetland impact. Reduced right of way purchase. Reduced storm sewer. Reduced mowing to 2 times per year vs. 10 times. Saved at least $100 ‐$200K compared to traditional project
cost but the main point is all of these LID elements were not more expensive.
Cost Effectiveness
• Drought: – Is it ever going to rain again?– Irrigation needs
• Landscape:– What will work? – Seed establishment– Use Natives– Bidding:
• This is “different”.
• Monitoring – Costly
Challenges
Consider the project goal Evaluate project costs Visualize the landscape plan Determine vegetation establishment Think outside the box.
Planning considerations
