Construction Program Guide
The FHWA's policies for construction time and time extensions provide for their use and for the review and approval of time related contract modifications for Federal-aid participation.
- Title 23 U.S.C. 315 provides very broad authority for the Secretary of Transportation to prescribe regulations to carry out the Federal-aid highway program. However, there are no specific statutes dealing with construction contract modifications other than the required use of standardized changed conditions clauses as required by 23 USC 112(e).
- Title 23 C.F.R. 635.102 - Definitions
- Title 23 C.F.R. 635.109 - Standardized changed condition clauses prescribes the standardized contract clauses mandated by the 1987 Surface Transportation and Uniform Relocation Assistance Act. These contract clauses include the following:
- Differing Site Conditions,
- Suspensions of work ordered by the engineer, and
- Significant changes in the character of work
- Title 23 C.F.R. 635.109(c) address the unique use of changed condition clauses for design-build contracts. The FHWA encourages but does not require the use of such clauses in design-build contracts.
- Title 23 C.F.R. 635.120 - Changes and extra work describes the FHWA approval procedures for the review and approval of change orders and extra work. Paragraph (c) discusses the need to address contract time impacts when developing a contract change document.
- Title 23 C.F.R. 635.121 - Contract Time and contract time extensions describes the FHWA approval procedures for the review and approval of time extensions.
The above regulations provide the FHWA's regulatory policy regarding construction contract modifications. However, please note that these regulations were last updated on August 2, 1991 and do not include revised stewardship, oversight, and applicability requirements resulting from the 1991 ISTEA and the 1998 TEA-21. See the discussion in the FHWA Contract Administration Core Curriculum Manual for a summary of current FHWA policy).
- FHWA Contract Administration Core Curriculum Manual (see "Policy" above).
- Technical Advisory 5080.10 dated February 8, 1989, Subject: Incentive/Disincentive for Early Project Completion - provides guidance for the development and administration of incentive/disincentive (I/D) provisions for early completion on highway construction projects or designated phase(s).
- Technical Advisory 5080.15 dated October 15, 2002, Subject: FHWA Guide for Construction Contract Time Determinations - provides procedures for determining contract time for construction projects.
- FHWA Form 1365 - Record of Authorization to Proceed with Major Contract Provision is a form that can be used to document the FHWA's advance approval of change orders and/or time extensions.
- Transmittal of Geotechnical Engineering Notebook Issuance GT-15, Geotechnical Differing Site Conditions, May 2, 1996 (.pdf, 100 kb) provides guidance on the use of differing site condition clauses for geotechnical applications.
- FHWA Non-Regulatory Supplement to 23 CFR Part 635 - #5 Changes and Extra Work; and # 7 - Contract Time and Contract Time Extensions
- AASHTO Subcommittee on Construction 2005 survey on construction delay and best practices for delay claims provides a summary of STA practices related to managing and evaluating construction delays (http://construction.transportation.org/Documents/Wortham-Delays.pdf)
- Texas DOT Accelerated Construction Strategies Guidelines (www.dot.state.tx.us/cst/construction_strategies.htm) contains guidance on developing I/D clauses; developing road user costs and using CPM to manage projects and analyze the impact of changes