Analysis of INDOT current hydraulic policies.

Details

• Alternative Title:
  Joint Transportation Research Program : Civil Engineering
• Creators:
  Merwade, Venkatesh ; Kumar, Sanjiv
• Corporate Creators:
  Purdue University. Joint Transportation Research Program
• Corporate Contributors:
  Indiana Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Hydraulic fluids
  • Hydraulic properties
  • Hydraulic structures
  • Bridges
  • Culverts
  • Sediment discharge Hydraulic policy
  • Culvert
  • Bridge
  • Design discharge
• Publication/ Report Number:
  FHWA/IN/JTRP-2011/14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Indiana
• Edition:
  Final report.
• Corporate Publisher:
  Purdue University. Joint Transportation Research Program
• Abstract:
  Hydraulic design often tends to be on a conservative side for safety reasons. Hydraulic structures are ; typically oversized with the goal being reduced future maintenance costs, and to reduce the risk of ; property owner complaints. This approach leads to a conservative design with higher construction ; costs. Therefore, there is a need to quantify the cost-benefit aspect of this conservative approach. ; Accordingly, the overall objective of this project is to compare hydraulic design policies of Indiana ; Department of Transportation (INDOT) with that of other states, and perform cost-benefit analysis of ; large versus smaller hydraulic structures in terms of capital and maintenance costs. Comparison of ; INDOT’s culvert design is similar to that of Michigan, and is most updated compared to Ohio, Illinois ; and Kentucky. INDOT uses Q100 as the design discharge, which is conservative compared to other ; neighboring states that use Q50 as the design discharge for designing culverts. By using the data from 16 ; culvert design examples including both new-alignment and replacement structures, cost benefit analysis ; is performed in the light of suggested revision in culvert hydraulics policy. Results show that an ; increase in backwater limit to 1’ will result in 44% reduction in culvert size (represented as culvert area) ; with an average backwater of 0.79’. Increase in backwater limit will also increase the outlet velocity by ; 72% that may result into extra cost in outlet protection structures. Depending on the type and the size of ; the culvert, a change in hydraulic policy may result in saving from 12 -58% of the original cost ; associated with the current conservative design.
  More +
• Format:
  PDF
• Funding:
  SPR-3405
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23603/dot_23603_DS1.pdf
• File Type:
  [PDF - 2.98 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:32e6a53b7019729ba89396dde883e42b832b7446b5beb4aa1152cd4bf2fbaf85cb1bba21354714b817403b5100e78798e8786728e4bd2a8630693348b9694e6f