An official website of the United States government
Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
EFLHD Supplement 9.6.8.4.3-1
Purpose: This supplement instructs the designer on the addition of contingencies to the Class A construction cost estimates.
Approved: 4/11/2019
Pages: 1
CFLHD Supplement 1.1.6-1
Purpose: The purpose of this supplement is to describe the methodology for issuing CFLHD Supplements to the PDDM.
Approved: 8/23/2007
Pages: 4
Documents:
CFL Supplement Template
CFL Transmittal Memorandum
CFLHD Supplement 4.4.1-1
Purpose: This supplement provides guidance for using the AASHTO Guidelines for Geometric Design of Very Low-Volume Local Roads (ADT ¤400)
Approved: 11/21/2008
Pages: 1
CFLHD Supplement 11.4.2-1
Purpose: This supplement describes guidelines on the use of the catalog method for aggregate surfacing thickness design.
Approved: 10/18/2010
Pages: 5
CFLHD Supplement 8.1-1
Purpose: This supplement provides guidance for safety-related design procedures at CFLHD.
Approved: 10/18/2010
Pages: 1
Resources: CFLHD Guidelines for Safety-Related Design Procedures (only available within FLH)
CFLHD Supplement 7.1.3.1-1
Purpose: The purpose of this supplement is to provide additional guidance on the assessment of existing cross-drainage structures.
Approved: 10/18/2010
Pages: 1
CFLHD Supplement 3.3.3.1-1
Purpose: This supplement provides guidance on the roles and responsibilities associated with Clean Water Act NPDES permits.
Approved: 10/18/2010
Page: 1
CFLHD Supplement 9.6.6.2-1
Purpose: This Supplement describes the Design Technical Memorandum prepared during the project development process. The Project Technical Memorandum is intended to provide insight into the background and decisions that impact the design of the work elements within...