2021 Construction Specifications

The 2021 Standard Specification book is mandatory for use on projects advertised on or after October 1, 2021 until September 30, 2022.
Standard Special Provisions

The latest revisions to formally issued standard special provisions that modify the Colorado DOT's 2021 Standard Specifications for Road and Bridge Construction.

Project Special Provision Worksheets

These work sheets are used to create commonly used project special provisions that modify Colorado DOT's 2021 Standard Specifications for Road and Bridge Construction.

Style Guide for Writing Specifications

The intention of this guide is to help people who create or edit specifications for the Department. Following the recommendations and guidelines will result in specifications that are clear, concise, correct, complete, and consistent. This Style Guide is a standardization device designed to achieve uniform word and type treatment, and aiming for economy of word use.

CDOT Roadway Design Guide; Chapter 16 - Construction Specifications

This chapter defines Standard Specifications and Special Provisions. It provides the format for writing Special Provisions, and describes the approval process for both Standard and Project Special Provisions. __________________________________________________________________________________

Asphalt Cement Cost Adjustment with Poten & Partners and Argus Americas prices

PLEASE NOTE: As of February 6, 2020, please use these prices for the Asphalt Cement Cost Adjustment index. These monthly prices are averaged from the weekly "Poten & Partners" and "Argus Americas" prices for asphalt oil according to oil distilleries in Colorado and neighboring states. They accurately more reflect the true asphalt oil prices that CDOT uses for the plus (+) or minus (-) 10% changes according to the Revision of Section 109 - Asphalt Cement Cost Adjustment specification.

Asphalt Cement Cost Adjustment for Hardisty WCS

Please note: THE CURRENT PRICES FOR ASPHALT CEMENT COST ADJUSTMENT FOR HARDISTY WCS ARE NOW IN THE "2022 CONSTRUCTION SPECIFICATIONS" WEBSITE. PLEASE UPDATE YOUR BOOKMARKS. As of July 31, 2015, Flint Hills Resources stopped posting their daily prices for Hardisty WCS. Now they post only an once per month differential (less than) price in US$/BBL compared to West Texas Intermediate Crude Oil (WTI) daily prices. There are 6.65 BBLs of crude oil (average gravity) in a short ton (source: USGS). The monthly average oil prices are in American dollars per short ton (2000 lbs).

Fuel Cost Adjustment - Denver No. 2 Ultra-Low Sulfur Diesel

Please Note: THE CURRENT PRICES FOR FUEL COST ADJUSTMENT - DENVER No. 2 ULTRA LOW SULFUR DIESEL ARE NOW IN THE "2022 CONSTRUCTION SPECIFICATIONS" WEBSITE. PLEASE UPDATE ANY BOOKMARKS. ______________________________________________________________