The Greenbook and the Special Provisions Guide is under the oversight of Public Works Standards, Inc. (PWSI)
50 Years of Setting Standards in Public Works Construction
The trusted guide in public works construction
Ensuring Fairness in Public Projects
Encouraging fair competition among private contractors bidding for public projects
Keeping Public Construction Projects on Track
A universal manual that ensures everyone involved in public works projects are on the same page
The Greenbook's History
First published in 1967 through extensive collaboration