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Depending on a review of the county’s five-year road program, Riverside Road could see six miles of remaining highway get concrete paving in fiscal year 2021 and Vine Avenue in Crawfordsville get full-depth overlay – asphalt or concrete – in fiscal 2023.
A detailed review of the projects was discussed by County Engineer Jacob Thorius and the supervisors in a recent work session.
The Riverside Road project has already used federal Surface Transportation Block Grant (STBG) to connect two projects on it this year with six miles remaining.
Plans are to use concrete on the lanes and shoulders to match the rest of the road. It would be done in fiscal 2021’s construction season and an estimated $3.5 million cost to complete.
Part of the funding could come from a $500,000 state Traffic Safety Improvement Program (TSIP) grant to be applied for in August 2019. Funds would become available in July 2020.
There also is the possibility of further grants, including applying to the Washington County Riverboat Foundation (WCRF) and use of local funds.
Vine Avenue in Crawfordsville is programmed for a full-depth overlay in 2023, including four miles of 6-inch minimum asphalt or concrete north and south of the town. It would be similar to what was done on Vine Avenue, north of G36.
There also is a half-mile, (east-west) within the town, and Thorius recommended a 20 percent match with the town “for all work outside the center 24 feet plus all storm sewer/drainage costs.”
Current estimate for the work is $2.35 million, with $1.6 million programmed from STBG funds with the remainder from state/local funds. The project has an expected service life of 40 years, noted Thorius.
There also would be a maintenance overly for about two miles of asphalt south of the town to Wyman Road or the end of Vine Avenue. The estimated cost for this is $180,000 from local funds.
Planned for work in the next two years is surfacing two miles in the Ainsworth area, south of Haskins to Highway 218 and south, past the Diary Mart.
It was noted that Crawfordsville would be responsible for maintaining drainage intakes and structures along the route, adjusting for necessity and availability of funds.
Thorius said that this is only maintenance work with an expected service life of five to 10 years.
A second option for Vine Avenue would be using all $2.1 million in STBG funds, an allotment through 2023.
Regarding funding for all work, it was suggested that the county borrow ahead on STBG funding from the Region 10 Regional Planning Affiliation – which includes Benton, Cedar, Iowa, Johnson, Jones, Linn and Washington counties – use federal maintenance funds, local allocations, WCRF grants or wait until other funding is available.
The county also could do a significant maintenance patching project.
Thorius also noted that deadline for submitting the STBG application for 2020-23 funding was Dec. 17.
The outlined projects will be part of the board’s annual review of the five-year program early next year.