AASHTO CULVERT AND STORM DRAIN SYSTEM INSPECTION GUIDE Jesse L. Beaver, P.E. Principal, Simpson Gumpertz & Heger Inc. 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz 28 August 2018 & Heger Inc. Agenda • Introduction: speaker bio and company profile • Background • AASHTO Culvert and Storm Drain System Inspection Guide • Section 1 – Introduction • Section 2 – Design and performance characteristics • Section 3 – Inspection procedure • Section 4 – Condition rating system • Section 5 – Asset management • Appendices 2 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Speaker Bio: Mr. Jesse L. Beaver, PE, P.Eng • Principal, Engineering Mechanics & Infrastructure Division, Simpson Gumpertz & Heger Inc., Waltham, MA • Buried pipe experience: • Principal Investigator, NCHRP 14-26, Culvert & Storm Drain System Inspection Manual • Buried pipe design and investigation; development of pipe structural design methods, materials/products testing; municipal standards development; construction support • Related activities: • Chair, Transportation Research Board (TRB) AFF70 Culverts & Hydraulic Structures • Chair, ASTM F17.65 Plastic Pipes, Land Drainage; Member: ASTM A05 Metal Pipe and F17 Plastic Pipe • Instructor, Design of Buried Pipes, American Society of Civil Engineers (ASCE) Continuing Education • Registered Professional Engineer: Approximately 20 US States and 4 Canadian Provinces • Education: • MSCE, Structural Engineering, Massachusetts Institute of Technology, Cambridge, MA • BSCE, Civil and Environmental Engineering, University of Washington, Seattle, WA • AA, University of Maryland, Augsburg, Germany 3 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Simpson Gumpertz & Heger Inc. • Simpson Gumpertz & Heger Inc. (SGH) • http://www.sgh.com/ • Founded by three MIT professors in 1956 • Dr. Howard Simpson, Mr. Werner Gumpertz, Dr. Frank Heger • 600+ staff, 9 office locations in 6 states • CA, DC, IL, MA, NY, TX 4 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Background: NCHRP Project 14-26 • Project Completed: March 2016 • Objective: Develop an inspection manual for assessing the condition of in-service culvert and storm drain systems to ensure system safety and performance and the economical use of owner resources • Oversight Panel: DOT, FHWA, Manufacturers, Industry, Engineers, Academia • SGH Team: Jesse Beaver (PI), Matthew Richie (PM), Robert Keene • Final Deliverable: Culvert and Storm Drain System Inspection Manual • Replacement for 1986 FHWA Culvert Inspection Manual • Adopted by AASHTO in June 2018 as a Guide • Publication expected early 2019 • http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3172 5 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Background: Terminology • Culverts • Buried structures • Designed to allow passage of water under roadways, railways, or embankments • Can be structurally similar to bridges, with total span less than 20 ft • Storm Drains • Typically low-head or gravity flow • Closed-end conduits with inlet and outlet structures and in-line junction boxes • Convey stormwater from impervious surfaces to collection and discharge points • Highway bridges • “Culverts” with spans ≥ 20 ft, including multi-barrel with spacing less than D/2 • Federally mandated inspection every 2 yrs; state-specific policies vary with some treating 10ft span and up as bridges • Culverts outnumber bridges significantly, with numbers approaching 10 to 1 • No federally mandated (or funded) inspection cycle • Many are not contained in any formal database and go uninspected for years until failure 6 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Background: 1986 Culvert Inspection Manual • Materials: • Precast Reinforced Concrete Pipe (RCP) • Cast-in-place (CIP) Concrete • Corrugated/Structural Plate Steel • Corrugated Aluminum • Stone Masonry • What about plastic? 7 © 2018 Jesse L. Beaver, All Rights Reserved 28 August 2018 Simpson Gumpertz & Heger Inc. Background: 1986 Culvert Inspection Manual • Materials: • Precast Reinforced Concrete Pipe (RCP) • Cast-in-place (CIP) Concrete • Corrugated/Structural Plate Steel • Corrugated Aluminum • Stone Masonry • What about plastic? 8 © 2018 Jesse L. Beaver, All Rights Reserved 28 August 2018 Simpson Gumpertz & Heger Inc. Background: Local Inspection Programs • Some jurisdictions have developed specifications and hired consultants for culvert inspections - Colorado • Many jurisdictions have developed their own manuals (or used bridge inspection manuals to inspect culverts) - Minnesota, Federal Lands Highways, New York State, Connecticut, New Jersey, Ohio • Some states have developed training and/or certification courses for their culvert inspection programs - Ohio, Minnesota, California 9 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Background: How do States Manage Culverts? • Inventory Management Systems • Catalog and track infrastructure assets • Identify the infrastructure asset value • Effective systems include: inventory, inspection, management/documentation, planning, budgeting, decision- making Data from January 2007 questionnaire sent to state bridge engineers. 10 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. AASHTO Culvert and Storm Drain System Inspection Guide 11 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Organization of the Inspection Guide • Section 1 – Introduction • Section 2 – Design and Performance Characteristics • Appendix A – Structural Shapes, Materials, and System Components • Section 3 – Inspection Procedure • Section 4 – Condition Rating System • Appendix B – Catalog of Distressed Conditions • Section 5 – Asset Management Roadway collapse due to piping along culvert and loss of backfill 12 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. AASHTO Culvert and Storm Drain System Inspection Guide Section 1 - Introduction 13 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Section 1 – Introduction Overview: • Introduces culvert and storm drain system inspection • Outlines need for standardized inspection program • Provides the objectives of the guide • Identifies the intended audience • Instructs users on the guide organization and Roadway collapse due to structural failure of culvert use for inspections 14 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Section 1 – Introduction Objectives of the Guide: • Quantitative and consistent condition rating criteria based on engineering principles and existing best practices • Enable culvert and storm drain inspectors to: • Identify structural distress for culvert or storm drain system components • Rate the condition of the system components • Document findings of an inspection • Recommend basic corrective actions or notifications where appropriate • Present methods for owners to justify repair funding requests and to prioritize rehabilitation programs • Update the 1986 manual with contemporary information 15 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Section 1 – Introduction Goals of the Guide: • Evaluate structural integrity, hydraulic performance, and roadside compatibility • Identify minor issues that can be addressed through maintenance before they become safety hazards • Mitigate repair costs • Reduce risk of unexpected failure • Provide input to prioritize rehabilitation and maintenance • Allow for short- and long-term planning and budgeting for repairs and rehabilitation • Provide a method to meet state and federal requirements to quantify the value of highway infrastructure assets • Provide input to load rating procedures 16 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Section 1 – Introduction Target audience: • Highway departments • State highway agencies (DOTs) • County Highway Divisions • Local agencies • Personnel • Culvert and storm drain system inspectors and bridge inspectors • Consultants to highway agencies responsible for culvert and storm drain system inspection • Personnel responsible for performing scheduled maintenance on culvert and storm drain systems 17 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. AASHTO Culvert and Storm Drain System Inspection Guide Section 2 – Design and Performance Characteristics 18 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Section 2 – Design and Performance Characteristics Overview: • Introduces factors that affect structural and functional performance • Describes design characteristics • Provides structure shapes, materials, and coatings • Describes culvert and storm drain components 19 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved Simpson Gumpertz & Heger Inc. Section 2 – Design and Performance Characteristics Contents: • Design Characteristics • Hydraulic Requirements • Structural Behavior – Flexible vs. Rigid • Loads on Culverts and Storm Drains • Construction and Installation Requirements • Performance Characteristics • Durability • Culvert and Storm Drain Shapes and System Components • Refer to Appendix A for additional details 20 28 August 2018 © 2018 Jesse L. Beaver, All Rights Reserved