2022-02-28_PERMIT FILE - M2022003

• Permit No: M2022003
• IBM Index Class Name: Permit File
• Doc Date: 2/28/2022
• Doc Name: Adequacy Review Response
• From: CRCC
• To: DRMS
• Email Name: RAR
• Email Name: JLE
• Media Type: D
• Archive: No

STATE OF COLORADO
DEPARTMENT OF TRANSPORTATION
Region 2 Materials Unit
5615 Wills Blvd
Pueblo,CO 81008
[phone]
PROJECT INFORMATION:
PCN: 22210
PRJ: STA 2872-019
LOC: US 287B MP 85 to 112.6
May 22, 2019
TO: Zach Bay
FROM: Jody Pieper
SUBJECT: Pavement Justification Report
Project STA 2872-019 is on US 287B from MP 85 to MP 112.6 in Kiowa County and Prowers
County, Colorado. Improvements will consist of widening US 287B to add passing lanes in each
direction along with ten foot shoulders. Currently, this portion of US 287B has a Drivability Life
(DL) of 16 to 18 years.
A component analysis of the existing pavements indicated that the pavement within the project
limits is primarily structurally sound. As this project will consist of widening or adding onto existing
Portland Cement Concrete Pavement (PCCP) that is structurally sound, a Life-Cycle Cost
Analysis comparing Asphalt to Concrete was not performed. Instead, full depth concrete
pavement is being recommended. This is in accordance with the 2018 CDOT Pavement Design
Manual, Section 13.2. This project will be designed by the CDOT Region 2 South Program, with
the pavement design and stabilization information supplied by the CDOT Region 2 Materials Unit.
Traffic data used in the analysis is from the Division of Transportation Development based on
2018 published volumes. A preliminary soil survey was performed in 1996 and the subgrade
information obtained from this soil survey was used in the design of the new pavement section
recommended herein. The AASHTO computer design program AASHTOWare Pavement ME
Design was used to analyze the new pavement section selected for this project. The output of
the pavement thickness design is included with this memorandum.
Recommendations
Based on the results of the pavement analysis, Region 2 Materials recommends that the
widening/new construction for the passing lane and shoulder improvements consist of following:
US 287B — New Pavement Section for Widening/Passing Lane Improvements
The new pavement section to be used for this project should consist of 11" of PCCP over 6"
of ABC Class 6 and A-2-4 or better embankment materials.
Applicable project special provisions for use on this project will be provided. In addition, a copy
of the index of standard special provisions with applicable materials specifications for this project
highlighted will also be provided.