RIVERWALK PLANNING, DESIGN AND CONSTRUCTION COMMITTEE AGENDA ITEM
ACTION REQUESTED:
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Receive the soils and preliminary design reports and provide comments regarding the proposed permeable paver parking lot near the grand pavilion
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DEPARTMENT: Transportation, Engineering and Development
SUBMITTED BY: William J Novack, P.E., Director of Transportation, Engineering and Development/City Engineer
BOARD/COMMISSION REVIEW:
NA
BACKGROUND:
There is a long linear parking lot that serves the western portion of the Riverwalk running from the Jaycee's Playground to the grand pavilion. The parking lot drains by simple sheet flow from north to south conveying not only the runoff from the parking lot but also the runoff from the properties on the south side of Jackson Avenue. Because the City and Park District are always looking at ways to be more sustainable and improve water quality, we have targeted converting this parking lot into a permeable parking lot when it needed to be reconstructed.
A permeable parking lot takes the stormwater runoff from the parking lot and any areas tributary to the lot and allows the water to soak into the ground underneath the parking lot. While special concrete or asphalt mixes can be used to create a permeable lot, the most common paving surface is a permeable paver. These pavers have spaces designed between the pavers that are filled with stone chips. The stormwater runoff drains into the small opening, down through the stone chips, down through an open-graded stone base and into the ground.
One of the most important elements of a permeable parking lot is the ability of the ground at the bottom to accept and allow the stormwater runoff to percolate further into the ground. Many of the soils in our area are dense clay and silt which do not allow the stormwater to percolate into the ground. When these poor-draining soils are present a permeable parking lot is not feasible.
DISCUSSION:
We had Engineering Resource ...
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