C. Final rolling of the top course or surface treatment pavement shall be performed by a steel
wheel roller weighing not less than 285 pounds per inch width of tread at a mix
temperature and time sufficient to allow for final smoothing of the surface and thorough
compaction.
D. Immediately after placement of top course or surface treatment pavement, all joints
between the existing and new top course or surface treatment pavements shall be sealed with
hot poured rubberized asphalt sealant meeting the requirements of Federal Specification
SS-S-1401 or SS-S-164.
E. Where there is no backing for the edges of the curb-to-curb pavement, the Contractor shall
provide a gravel transition. The gravel transition shall be installed immediately after the
pavement is placed, shall be feathered and extend a minimum of 18 inches, and shall be
compacted using the same equipment as for pavement compaction. The gravel shall be
uniformly graded material with a maximum size of 3/8 to 1/2 inch.
F. When directed by the Engineer, the Contractor shall furnish and install additional paving to
provide satisfactory transition for driveways and walkways impacted by a new curb-to-curb
pavement installation. The transition installation will be considered incidental to the curb-
to-curb pavement installation.
3.07 RAISING AND ADJUSTING CASTINGS:
A. In areas of permanent top course paving, existing municipally-owned catch basin and
manhole castings and valve boxes shall be raised to the proper grade where directed by the
Engineer.
B. Castings owned by private utilities shall be raised by their own forces. The Contractor shall
be responsible for coordinating this work.
C. The method of adjusting these castings shall be as follows: Cut around catch basin or
manhole castings a minimum of 8-inches from casting. Excavate and if required rebuild up to 18-
inches of masonry below the bottom of the casting. Backfill with suitable material and
compact to bottom of casting. Place high, early strength cement or bituminous concrete
collar, as directed, to approximately 1 1/2-inches below the raised casting grade. Masonry work
shall conform to Section 02631, PRECAST MANHOLES AND CATCH BASINS.
D. _ In some areas, raising of castings may not be required. Where directed by the Engineer,
castings not to be raised shall have at least 12-inches of bituminous concrete pavement
chipped and removed around the casting. New bituminous concrete pavement shall be placed
and compacted around such castings to approximately 1-1/2-inches below the top of the casting.
The overlay course shall then be sloped down to the level of the casting.
E. The method of raising valve boxes shall be as follows: Cut around valve box a minimum of 8-
inches from valve box. Excavate as required and raise the valve box. Pour high early strength
cement or bituminous concrete collar, as directed, to approximately 1-1/2-inches below the top
of the valve box.
2019 Sewer Replacement Project Road Restoration
Nashua, NH 02745-7
