The National Academies

NCHRP Synthesis 20-05/Topic 48-05 [Active (Synthesis)]

The Renewal of Stormwater Systems Using Trenchless Technologies
[ NCHRP 20-05 (Synthesis of Information Related to Highway Practices) ]

  Project Data
Funds: $45,000
Authorization to Begin Work: 5/9/2016 -- estimated
Staff Responsibility: Tanya M. Zwhalen
Research Agency: Shannon & Wilson, Inc.
Principal Investigator: David Ward
Effective Date: 8/31/2016
Fiscal Year: 2016

Final Scope

Highway stakeholders recognize the overwhelming need for effective technologies in both the structural and functional renewal of stormwater facilities. At the same time, facility owners have a need to minimize negative impacts and maximize the cost benefits. Trenchless technologies are replacing traditional techniques to accomplish the renewal of culverts, storm sewers, and drainage structures.

The objective of this synthesis project is to summarize trenchless technologies used for the renewal of stormwater systems, including new, emerging and underutilized methods, and to identify future research needs.

Information to be gathered will include, but not be limited to:
• Successful practices for trenchless technologies used for the renewal of stormwater systems;
• Decision criteria used by facility owners when choosing a renewal method;
• Limiting factors to the applicability of specific trenchless technologies;
• How state DOTs and local agencies are using trenchless technologies;
• A summary of emerging technologies; and
• Uses of trenchless technologies by other industries that might be used in highway applications.

Information will be gathered through:
• A literature review of all existing research on the use of these technologies, including international experience;
• A screening survey of state DOTs and 25 municipalities or special districts to identify successful examples of the use of these technologies; and
• Not less than five case studies involving the use of different technologies and conditions where they are applicable. Case studies should include project background, specific conditions, methods used, materials used, environmental conditions (e.g. soil classification, water table), selection criteria, estimated versus actual cost, expected life, structural and hydraulic impacts, maintenance inspection data (if available), proposed inspection schedule, and relative satisfaction with method.

Information sources:
• NCHRP Synthesis 242, Trenchless Installation of Conduits Beneath Roadways
• Morgan Kessler to provide title of SBIR study
• Morgan Kessler to provide best practices report title
• FHWA’s 2002 “Manual For Controlling and Reducing the Frequency of Pavement Utility Cuts”
• Pipeline Infrastructure Renewal and Asset Management by Mohammed Najafi
• May 2016 Final Cost Benefit Analysis of Culvert Replacements for Ohio DOT (Tanya has an electronic copy) 

TRB Staff 
Tanya Zwahlen 
Phone: 585-315-1834
Email: tzwahlen@nas.edu

Meeting Dates
First Panel:  August 31, 2016, Washington, DC
Teleconference with Consultant: October 11, 2016, 3:00 p.m.
Second Panel: June 15, 2017, Washington, DC

Topic Panel
Thomas Birnbrich, Ohio DOT
Bryan Bradley, Iowa DOT
Matthew DeLong, Michigan DOT
JoAnn Kurts, Louisiana Dept.of Trans & Development
Mohammad NajafiThe University of Texas at Arlington
C. Paul Scott, Cardno
Alana Spendlove, Utah Department of Transportation
Morgan Kessler, Federal Highway Administration
C. K. Leuderalbert, Federal Highway Administration
Stephen F. Maher, Transportation Research Board

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