The South 1st Street reconstruction is part of a multi-phase project on the eastern side of Council Bluffs, IA to improve neighborhood streets throughout the community. The neighborhood’s inception dates back to the turn of the century. The infrastructure at this location was originally constructed without storm sewers and on moderately sloped grades with narrow right-of-ways.
Streets that are 30 years old or more have significantly outlived their service life. In many cases, the only strategy is reconstruction, which can cost four to 10 times more to restore the street. Reconstruction is the process of removing the existing pavement entirely. On occasion, the subbase layer may also need to be rebuilt. If poor subgrade soils are found under the pavement, new aggregate subbase material can be placed and compacted or the old pavement material can be pulverized and compacted. A new asphalt or concrete surface is then placed on top. Curbs and sidewalks are often replaced as part of an urban road reconstruction project.
Reconstruction on South 1st Street included the complete removal and replacement of street, driveway, and sidewalk pavements along with sanitary sewers in the right-of-way. The project also included the construction of new storm sewers and intakes. Street cross sections and profiles were revised when conditions allowed in order to meet current standards. Construction was phased to maximize access to homes and limit disruption within the neighborhood.
With the exception of geotechnical engineering, Snyder & Associates completed all aspects of the project. Our team recommended phases to break the project into service basin areas with reasonable construction timelines. Services provided by our team included evaluating the existing drainage and sanitary sewer service areas, concept development for new storm sewers, construction documents, construction observation, and administration. We also prepared an option of probably cost for sanitary sewer reconstruction, storm sewer construction, street and sidewalk reconstruction.