NRCS NATIONAL ENGINEERING HANDBOOK (NEH) PART 642, SPECIFICATIONS FOR CONSTRUCTION CONTRACTS
NEH Part 642 is a complete replacement for National Engineering Handbook Section 20. These specifications are used primarily for PL-566 projects, Dam Rehabilitation projects, and other larger (non-CO-01) projects.
View and Download the current Part 642 CONSTRUCTION and MATERIAL specifications as well as the Instructions for Using these specifications. The above link will take you to the NRCS e-Directives web site. Once there, from the left side menu, select "Handbooks". Then from the list on the right, expand (by clicking on the + sign) Title 210- Engineering; then expand National Engineering Handbook; then select Part 642- Specifications for Construction Contracts. When that screen opens, there are three choices: Chapter 1- General Contract Specification Procedures; Chapter 2- National Standard Construction Specifications; and Chapter 3- National Standard Material Specifications.
STATE OF OHIO, DEPARTMENT OF TRANSPORTATION (O.D.O.T.)
Division of Construction Management
The O.D.O.T. Division of Construction Management web site maintains the Construction and Material Specifications (CMS) book. Several links are provided to various functions within the Division of Construction Management, including the Office of Construction Administration.