Water Environment Services has been working closely with the County Transportation Department and our contractor to come up with a roadway restoration plan that will give the community some very good roadways – in addition to the new sanitary sewers. The option of “grinding up the old material and repaving” is what we refer to as a Cement Treated Base (CTB) restoration – and it is an option that will be used on the worst streets. On some other streets, that have a considerable amount of asphalt still remaining, different approaches will be used for their restoration – with very good results anticipated. The deciding factors of which restoration scenario to use include:
· Amount of existing asphalt on streets
· Amount of gravel base
· Type of material underneath the gravel base
· Amount of traffic anticipated on the street
Here is a summary of what the current planned roadway restoration for the major streets looks like, but may be adapted to a modified final product depending on actual findings at the time of restoration efforts (or in other words, whatever will create the best end-product for the investment):
· Needham Street and Laura Avenue will receive the CTB pulverization process and two lifts of asphaltic cement (AC) over the top
· Jordan Street, 64th Avenue, 65th Avenue, Alder Place, May Street and Overland Street (between May and Linwood) have a significant amount of AC already (except where our trench went). We will put 2” of asphalt in to cap off the trench and then overlay the entire street with an additional layer of AC.
· Needham Court will received two lifts of AC
· Overland Street (between May and Bell) will receive either a CTB restoration, or have the remaining surfacing removed and a leveling course of gravel added and two lifts of AC over the top. Final determination will be made when the street is cleaned up and re-evaluated.
As to the concern about surface water runoff; this repaving should make little difference on that issue. All roadways were crowned (slightly higher in the middle of the road) before our project began, which made it so that the rainwater would run towards both sides and along the sides, but did not typically flow across the street. Stormwater running off into adjacent areas has always been an issue when there are no storm sewers or ditches, but the resurfacing of streets planned should not make any significant change in this – neither better or worse.
All paved driveways will be well tapered into. Shoulder rock will be placed along the sides of the new AC.
Dewayne Kliewer, P. E.
Water Environment Services
