MDOT Issues New Cold - Milling Special Provision
Recently MDOT published
12SP-501GG-01 COLD-MILLING HOT MIX ASPHALT SURFACE
This new special provision includes the following:
A more descriptive equipment requirements section for cold - milling machines including automatic grade controls.
New Requirements for a Cold-Milling Quality Control (QC) Plan and a Cold-Milling Operations Plan.
Surface texture requirements for the milled surface as measured by ASTM E 965 (maximum mean texture depth).
Effective with the July 2017 letting, this special provision will be used on all MDOT trunkline projects that have the pay item cold milling HMA surface.
This special provision was the result of a cooperative effort between MDOT and APAM. The goal is to provide a consistently uniform milled surface and to improve project level communications regarding the milling operations.
Thanks to the HMAOC Construction Committee for their work on this SP.
Special Provision for Fine Texture Milling Available for Use
Last year two MDOT pilot projects were conducted to evaluate a proposed fine texture milling SP which allows the milled surface to be exposed to traffic for a maximum of 72 hours before the asphalt overlay must be placed. Both projects (M-99 and M-43 in Hillsdale County) were successful and resulted in improved paving efficiency.
The SPECIAL PROVISION FOR FINE TEXTURE PAVEMENT MILLING- 12DS501 is now available for use on MDOT Non-freeway mill and overlay projects. Contractors are encouraged to work with MDOT region personnel to identify appropriate projects where this SP may be used.
Use statement:
"Consider for use on one course, non-freeway mill and resurface projects where the integrity of the existing pavement makes it suitable to allow traffic to be maintained on a milled surface for up to 72 hours and where it is desirable to expedite the project schedule and/or increase production paving."
A few of the requirements in the SP are:
The milling machine must be configured with either a 0.3 inch tooth spacing, a 0.6 inch tooth spacing operated at a maximum speed of 40 feet per minute, or approved equal configuration and speed capable of meeting ASTM E 965 testing requirements.
The milling operation cannot proceed more than 5 miles ahead of the paving operation. Coordinate milling and paving operations to minimize the exposure to traffic. The milled surface may be exposed to traffic for a maximum of 72 hours.
The milling operation must provide an acceptable surface texture by achieving a maximum Macro texture of 0.08 inches thickness according to ASTM E 965.
Thanks to the HMAOC Construction Committee for their work in monitoring the pilot projects and drafting this SP.
Other Special Provisions Updated:
The following 2012 FUSP has been deleted:
12SP-102B-01 CRITICAL PATH METHOD NETWORK SCHEDULE
The following 2012 FUSPs have been added:
12SP-108E-01 CRITICAL PATH METHOD SCHEDULE - Use in projects in which the progress clause requires a Critical Path Method schedule. Do not use in local agency projects unless requested by the local agency.
12SP-803B-01 CURB RAMP OPENING, CONCRETE - Use in all projects with sidewalk ramp curb openings.
12SP-812Y-01 TEMPORARY SPECIAL PAVEMENT MARKINGS (TRANSVERSE, LEGEND, AND SYMBOL) - Use in all projects with Temporary Special Markings.
All of these FUSPs changes will take effect with the July 2017 letting.
Engineering Operations Committee Minutes
April 6, 2017
EOC Minutes
Agenda items included:
Approval to utilize a Construction Manager/General Contractor (CMGC) procurement method for the several projects and also Fixed Price Variable Scope procurement for several projects.
Pavement Type Selection:
Route/Location: I-75 Business Spur, I-75 to North/10th Avenue, Chippewa County
Letting date - February 2018, HMA reconstruction selected.
Join us on Wednesday, August 16, 2017 for fun at Buck's Run Golf Club, 1559 S. Chippewa Road, Mt. Pleasant, MI 48858 for APAM's 11th Annual Scholarship Fund Golf Outing! We are seeking donations for our "Goody Bags" so if you have miscellaneous items that include your company's logo and would be appropriate for the golf bags, please contact us! We count on your participation and look forward to seeing you there. 
NAPA's new Emerald Eco-Label tool provides a user-friendly, inexpensive way for contractors to create on-demand environmental product declarations (EPDs). EPDs quantify the environmental impact of an asphalt mix, much like a nutrition label provides information on a food. To learn more about what an EPD is, watch 
