Groundwater System Impacts on the US 63 Railway Underpass Near Waterloo, Iowa

In Waterloo, IA the Iowa Department of Transportation (DOT) maintains a railroad underpass on Iowa 63 (E. Mullen Ave) between Dane and Newell streets. This underpass is depressed below the natural ground surface, and below the existing groundwater table, which results in the potential for seepage from the groundwater into the underpass. To control this seepage the Iowa DOT installed and maintains a groundwater dewatering system that depresses the groundwater table at the underpass to below the underpass elevation. In the future the Iowa DOT plans to replace the railroad underpass with an overpass, and fill in the existing underpass. It is unknown at present what impact this will have on groundwater table at and in the vicinity of the existing underpass. The objective of this study is to provide technical assistance to the Iowa DOT, Office of Location and Environment, with regard to evaluating the possible impacts on the groundwater system in the vicinity, due to the removal of the existing railroad underpass on Iowa 63 between Dane and Newell streets in Waterloo, IA. Phase I The first phase of the study focused on collecting and evaluating the existing available information on the site. In particular this included: 1) Meeting with Iowa DOT personnel to coordinate the study. 2) Collecting known DOT site and historical information with the assistance of the DOT. 3) Reviewing the available technical and hydrological information. 4) Preliminary groundwater modeling using the available data. The objective of Phase I was to determine if additional field data and modeling is needed to estimate the impact of the underpass replacement on the existing groundwater system. Phase I has been completed and the results indicated that the current field data is not sufficient to adequately define the zone of influence of the current dewatering system. Additional field data collection and modeling is needed to adequately define the impact of the current dewatering system on the groundwater table in the vicinity of the underpass. This information is critical to determining what, if any, dewatering system will needed, and to document any changes in the groundwater zone of influence with the change from an underpass to an overpass at US 63.

    Language

    • English

    Project

    • Status: Active
    • Funding: $14398.00
    • Contract Numbers:

      NHSX-063-6(88)-3H-07

      ISU proposal 129285

      Add 517

    • Sponsor Organizations:

      Iowa Department of Transportation

      800 Lincoln Way
      Ames, IA  United States  50010
    • Project Managers:

      Rost, James

    • Performing Organizations:

      Iowa State University, Ames

      Institute for Transportation
      ISU Research Park
      Ames, IA  United States  50011-8664
    • Principal Investigators:

      Jones, LaDon

    • Start Date: 20141001
    • Expected Completion Date: 20191231
    • Actual Completion Date: 0
    • Source Data: RiP Project 37291

    Subject/Index Terms

    Filing Info

    • Accession Number: 01571701
    • Record Type: Research project
    • Source Agency: Iowa Department of Transportation
    • Contract Numbers: NHSX-063-6(88)-3H-07, ISU proposal 129285, Add 517
    • Files: RiP, STATEDOT
    • Created Date: Jul 29 2015 1:00AM