ITEM 604.47 - DROP AND PLATE CASTING
A. SCOPE
This work consists of removing existing casting, removing brick and mortar supporting the
casting, plating the hole over the structure, and backfilling the hole. Excavation, plate removal,
and final adjustment to proposed grade will be covered under Items 604.4, Item 604.45, and Item
604.46 as determined by the Engineer.
B. MATERIALS AND CONSTRUCTION
This work shall include all labor, materials, equipment and transportation necessary to drop and
plate the existing manhole castings prior to reclaim and milling as directed. Plates shall be of
sufficient strength for traffic loading. Contractor shall be responsible for keeping records
identifying, with measurements, where all dropped castings are located. Contractor is responsible
for management of all castings once they are removed from the manholes, and for locating all
dropped castings when they need to be adjusted.
Removed castings shall not be stored on private property.
At locations where structures have been lowered, Contractor shall backfill to surface with
compacted gravel or provide a temporary bituminous patch.
The Contractor shall be responsible to maintain the gravel surface or temporary bituminous patch
with particular attention to potential washouts during storm events.
Should compacted gravel not be satisfactorily maintained, the Contractor shall be required to
construct a temporary bituminous patch at all remaining locations where structures are lowered.
Unless otherwise noted herein, this work shall conform to the latest approved City of Nashua
Standard Specifications for Road Construction, City of Nashua Standard Specifications for
Sewers and Drains, and the latest approved NHDOT Standard Specifications for Road and
Bridge Construction. The most stringent specification shall apply unless otherwise directed by
the Engineer.
C. MEASUREMENT AND PAYMENT
Payment for Drop and Plate Casting shall be at the contract unit price specified for each. All
castings regardless of size will be paid for as one (1) each. This payment shall include all
materials, labor, equipment, and all else needed to complete the work under this item.
Contractor shall record the number and location of castings dropped and plated for each street.
Payment is contingent upon submittal of quantities in a per structure, and per street format.
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