Ecologically aware design of waterway-encapsulating structures.

Details

• Creators:
  Lyn, Dennis A. ; Sangwan, Nikhil
• Corporate Creators:
  Purdue University. Joint Transportation Research Program
• Corporate Contributors:
  Indiana Department of Transportation
• Subject/TRT Terms:
  Aquatic Life Aquatic Organism Passage Bridge Waterways Culvert Culverts Design Life Cycle Costing Regulation Stream Restoration
• Publication/ Report Number:
  FHWA/IN/JTRP-2016/21
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Indiana
• Corporate Publisher:
  Purdue University. Joint Transportation Research Program
• Abstract:
  Aquatic organism passage (AOP) in waterways-encapsulating structures, particularly culverts, is of growing concern to environmental
  
  regulatory agencies, and the Indiana Department of Transportation (INDOT) is seeking systematic responses to this concern in the
  
  hydraulic design of such structures. This study reviews design approaches to enhance or accommodate aquatic organism passage
  
  through culverts, and proposes a simplified design procedure that requires less data input and analysis, and yet results in a structure
  
  complying with the current regional general permit (RGP) conditions. It also makes as much use of already existing INDOT standard
  
  specifications for riprap and coarse aggregates that would be as backfill material to form a stable bed within the culvert. The simplified
  
  procedure is intended for new larger structures for which a culvert bed needs to be installed, and for expected Indiana conditions of
  
  low-gradient (<3%) and predominantly sandy or gravelly streams. Because of their larger size compared to traditional culverts, AOP-designed structures are associated with higher installation and
  
  material costs, which may however be compensated partially or wholly by lower costs over their operational lifetime. Previous work on
  
  life-cycle cost (including social/ecological costs) analysis of AOP-designed culverts was reviewed, but it is concluded that reliable data
  
  and methodologies for an adequate analysis are not yet available. The study then explores the consequences of alternative regulatory
  
  schemes formulated on the basis of habitat or biotic integrity indices. These may permit simple yet more flexible schemes with the same
  
  or even better ecological outcomes.
  
  
• Format:
  PDF
• Funding:
  SPR-3814
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ea619196af07962bf54370e4411bb0d34871d3b1c6b26bba8755f0ec9d120dd3
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31661/dot_31661_DS1.pdf
• File Type:
  [PDF - 4.17 MB ]