A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Under-Pavement Infiltration Demonstration — Decatur Street Low Impact Development Roadway Project
The City of Olympia has built a demonstration low impact development (LID) roadway that uses traditional pavement materials and infiltrates runoff under the roadway. Our transportation needs prompt extensive amounts of pavement with inadequate right-of-way area for onsite stormwater management. Current roadway designs conflict with the LID goal of dispersing and managing stormwater near its source. The Decatur Street LID Roadway Project is an innovative design that meets LID goals and manages its stormwater within the existing right-of-way. Under-pavement infiltration is advantageous because traditional water quality treatment and pavement construction materials can be used. This accommodates traditional maintenance and life cycle cost expectations for the above-ground roadway features. Utilizing the entire roadway area for infiltration provides designs suitable for poorly drained soils and for use with various roadway widths. This paper presents the design and construction aspects of the Decatur Street LID Roadway Project. The paper describes the three different stormwater management techniques utilized in the project. Roadway structural design is presented, including the use of geogrids for structural stability of the roadway over a subgrade of uncompacted soil. The bid prices, cost comparisons to traditional construction, and lessons learned are provided.
Under-Pavement Infiltration Demonstration — Decatur Street Low Impact Development Roadway Project
The City of Olympia has built a demonstration low impact development (LID) roadway that uses traditional pavement materials and infiltrates runoff under the roadway. Our transportation needs prompt extensive amounts of pavement with inadequate right-of-way area for onsite stormwater management. Current roadway designs conflict with the LID goal of dispersing and managing stormwater near its source. The Decatur Street LID Roadway Project is an innovative design that meets LID goals and manages its stormwater within the existing right-of-way. Under-pavement infiltration is advantageous because traditional water quality treatment and pavement construction materials can be used. This accommodates traditional maintenance and life cycle cost expectations for the above-ground roadway features. Utilizing the entire roadway area for infiltration provides designs suitable for poorly drained soils and for use with various roadway widths. This paper presents the design and construction aspects of the Decatur Street LID Roadway Project. The paper describes the three different stormwater management techniques utilized in the project. Roadway structural design is presented, including the use of geogrids for structural stability of the roadway over a subgrade of uncompacted soil. The bid prices, cost comparisons to traditional construction, and lessons learned are provided.
Under-Pavement Infiltration Demonstration — Decatur Street Low Impact Development Roadway Project
Haub, Andy (author) / Tosomeen, Craig (author)
International Low Impact Development Conference 2008 ; 2008 ; Seattle, Washington, United States
2008-11-10
Conference paper
Electronic Resource
English
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