Title/Name/Summary
143rd Street Widening, Watermain Relocation Design Services, Wolf Road to Southwest Highway, Phase II - Final Design Engineering Services, Contract Amendment, Change Order #4 and Addendum D
History
There is an existing 12-inch watermain located along the south side of 143rd Street. This watermain is over 35 years old as it was installed in the 80s. A small section of this watermain, in front of Crystal Tree subdivision, is 16 inch in diameter and was installed in 2005. The entire watermain is in the current Right of Way (ROW). Therefore, when 143rd Street is widened, the new and widened roadway would be over the existing watermain. It is the Village’s general practice to relocate utilities including watermains from underneath the roadways when new roads are constructed. This is a best management practice that allows easier access to watermains and makes it less costly when repairs or maintenance to the utilities are needed. Therefore, as part of the 143rd Street Widening project, this watermain is planned to be relocated.
Another advantage of the watermain relocation is that the water demand in this area of the Village has increased and requires that the watermain from Southwest Highway to 108th Street be maintained at 12 inch and the watermain from 108th Street to Wolf Road be upsized to 16 inch. Additionally, this pipe relocation will provide the Village with a new pipe compared to a 35+ year old pipe.
TranSystems, who is the prime engineering consultant for the 143rd Street Widening project, has submitted the attached proposal to design the watermain as follows:
- Watermain design from Southwest Highway to Woodland Avenue, called Contract 1, approximately 2,800 feet long
- Watermain design from Woodland Avenue to Wolf Road, called Contract 2, approximately 8,100 feet long
The watermain in Contract 1 will be designed and built with the 143rd Street and Southwest Highway intersection construction project, which spans from Southwest Highw...
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