2013 Session: 600

• State of the Practice: Evaluation of Sediment Basin Design, Construction, Maintenance, and Inspection Procedures
  Abstract: To protect the nation’s surface waters from sediment-laden discharge, the proper selection, design, application, installation, and maintenance of erosion and sediment control practices on active construction sites are imperative. These practices will be required to comply with new, stricter regulations applied by the U.S. Environmental Protection Agency (USEPA) to control high sediment concentrations of stormwater discharges from construction sites. One means of control sediment-laden discharge is through the use of sediment basins. The purpose of this paper is to report results from a survey conducted to determine the state-of-the-practice for sediment basin design, construction, maintenance, and inspection techniques employed by state highway agencies (SHAs) nationwide. The survey consisted of 68 possible questions in six categories: (1) Background and Experience, (2) Design, (3) Construction, (4) Maintenance of Sediment Basins during Construction, (5) Inspection and Monitoring, and (6) Lessons Learned. A total of 37 responses (74% response rate) out of a total of 50 SHAs were received and analyzed.. The summary of the survey including lessons learned allow knowledge and experience to be transferred to practitioners that may have little or no experience with using sediment basins on construction projects. The survey shows that the typical design life of a sediment basin lifespan is between 6 months and 2 years, the generally accepted minimum storage volumes among most agencies is 3,600 cubic feet per acre of disturbed area draining to the basin, and thirteen agencies use flocculant additives to enhance the efficiency of sediment basins.
  Authors: Zech, Wesley Charles; Logan, Christopher P.; Fang, Xing
  Authors: Zech, Wesley Charles; Logan, Christopher P.; Fang, Xing
  Year: 2013
  Document Type: Paper
  Subject: Construction; Geotechnology
  Session: 600
  Paper Number: 13-1528
  Practice-Ready: Yes
• Determining Significant Factors for Earthmoving in Bridge Construction
  Abstract: Urban earthmoving operations are analyzed to identify significant factors that impact relatively low productivity. The research project was conducted in the urban interchange reconstruction of Interstate Highway 235 (I-235) in Des Moines, Iowa. By using observational studies and a statistical analysis method, the factors were identified, including match factor, number of passes, and loading cycle time per bucket. Number of truck, match factor, travel time, and hauling distance were identified as the unique factors for the off-site earthmoving project, while the start time and travel time were significant factors for the on-site project. This research also identified significant factors for the truck bunching and showed that the match factor from the urban earthmoving project does not linearly correlate with the productivity of each truck. Reducing the hauling distance for urban earthmoving projects was the principal method for improving productivity. Based on the research results, a pre-planning and execution method was proposed to improve earthmoving productivity for urban interchange reconstruction.
  Authors: Kim, Seonghoon; Bai, Yong; Jung, Yangki
  Authors: Kim, Seonghoon; Bai, Yong; Jung, Yangki
  Year: 2013
  Document Type: Paper
  Subject: Construction; Geotechnology
  Session: 600
  Paper Number: 13-4940
  Practice-Ready: Yes
• State of the Practice: Evaluation of Sediment Basin Design, Construction, Maintenance, and Inspection Procedures
  Authors: Zech, Wesley
  Authors: Zech, Wesley
  Year: 2013
  Document Type: Presentation; Poster
  Subject: Construction; Geotechnology
  Session: 600
  Paper Number: 13-1528