ROTOMILLING
PART 1 GENERAL
1.1SECTION INCLUDES
A.Rotomilling of the existing bituminous surface at the location and to the
depth shown.
1.2RELATED SECTIONS Not Used
1.3REFERENCES Not Used
1.4DEFINITIONS Not Used
1.5SUBMITTALS Not Used
PART 2 PRODUCTS
2.1EQUIPMENT
A.Use power-operated track propelled planing machine or grinder:
1.Capable of milling to cross slope as shown.
2.Self-propelled with sufficient power, traction, and stability to
maintain accurate depth of cut.
3.Maximum of ⅝ inch between the cutting teeth on the mandrel.
4.Use a minimum 12 ft mill head on interstates and freeways and a
minimum 7 ft mill head on all other roads or as directed by the Engineer.
B.Use cleaning equipment capable of sweeping, picking up millings, and
cleaning the vertical edge to clean up after milling operation.
Rotomilling
PART 3 EXECUTION
3.1ROTOMILLING
A.The Engineer may:
1.Measure and record rotomilling depths, taking two random
measurements every 1,000 ft of each pass of the milling machine.
2.Require an adjustment to the depth of the milling operation, up to
an additional 3/8 inch of depth, to remove unacceptable material or to improve ride.
B.Rotomill existing bituminous pavement surface to the width and depth
shown not to exceed an additional ⅜ inch of plan depth, measured from original surface to the top of the high point of the milled surface.
1.Produce a uniform pavement surface texture.
2.Adjust the speed of the milling operation to obtain continuous
horizontal grind marks on the roadway surface without a skipping pattern.
3.Limit the difference between the high and low points of the milled
surface to ¼ inch.
C.Load the millings from milling operation into a truck in one operation.
D.Millings not designated for use become the property of the contractor.
1.Remove and dispose of millings promptly as specified and
according to applicable rules and regulations.
2.Do not place millings on the job site except as described or as
approved by the Engineer.
3.2CLEAN AND REPAIR
A.Remove and clean all millings from the surface daily. Control dust created
by the cutting action. Clean rotomilled surface after milling operation and before opening to traffic.
B Verify all milled surfaces are sturdy and sound.
1.Remove any material that is loose or not well bonded.
END OF SECTION
Rotomilling
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 868–869 of 1,331.
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