SmithRowe DI00233 DEMOPLANv4.pdf

TELEPHONE: [phone] SMITH -ROWED LLC FAX: [phone]
639 OLD HIGHWAY 52 SOUTH
Mount Airy, NC 27030
DEMOLITION PLAN
Project: D100233 / TIP Project 17BP.9.R.72
Location: Bridge 8 on NC 704 over the Dan River
County: Stokes, North Carolina
This plan is based on available plan information and site visits at the existing structure.
Modifications of the plan may be required during the demolition operation to ensure the
safety of personnel, the traveling and boating public and to complete the demolition in a
timely manner. Should modifications be needed NCDOT, USFWS and the USACE will
be notified prior to the changes.
Prior to beginning saw cutting — all drains, voids and joints will be filled with expandable
foam to seal the voids/openings to prevent debris from falling into the river. The asphalt
wearing surface will be removed with an excavator. Upon removing the asphalt, it will be
removed off site as quickly as possible for recycling. Beginning with span C the edge
rails and deck panels between the girders will be saw cut into sections and removed with
an excavator and slab crab. Upon removal of the rails and decking cranes will be placed
on spans B and D and the girders will be lifted out. The beams will either be placed on
an awaiting truck on the new bridge (with lane closures) or on the old bridge deck behind
the crane and then pulled off with an excavator. Upon removal of span C, the causeway
will be installed under span D. To install the causeway, turbidity curtains will be installed
around the work area and the causeway will be installed within the permitted area. PCB
will be placed on either side of the causeway to assist in containment of debris. Upon
installation of causeway and PCB the deck and girders of span D will be demolished with
an excavator and hydraulic hammer. After demolition of span D, span E will be
demolished with excavators and hydraulic hammers. Interior bent 4 will be demolished
with excavators and hydraulic hammers. End bent 2 will be removed and debris will be
processed and removed off site for recycling. Upon demolition and removal of debris
from spans C, D, E, end bent 2 and interior bent 4 the demolition of interior bent 3 will
be performed. Interior bent 3 removal will be performed by making a saw cut on the
interior bent stems above the water level and pulling the upper section of the interior
bent onto the causeway (leaving the lower stems/footer below the water line). After
removing the upper section of the bent an excavator and hydraulic hammer will be used
to separate the remaining stem/footer from the riverbed. Another excavator will be
utilized to lift the unit (footer or stem) out of the river with a maximum of 3' of disturbance
of the stream bed. Upon removal of the interior bent, all debris will be removed, and the
causeway will be removed. All debris will be processed (away from the river) and
removed from the site for recycling. The operation will then move to the opposite side of
the river and the aforementioned steps will be repeated for spans B, A, end bent 1 and
interior bents 1 and 2.
Note 1: To expedite the project multiple steps may be performed concurrently
Note 2: Prior to asphalt overlay removal or other demolition operations floats will be
placed in the river. Floats will be wooden of various sizes and layered with plastic and
will have a raised perimeter (either timbers or straw bales) to contain any debris that
may fall. The floats will be under the work area and extend at least 8' beyond the work
area. Floats will not disturb the stream bed.
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Project: D100233 / TIP Project 17BP.9.R.72
Location: Bridge 8 on NC 704 over the Dan River
County: Stokes, North Carolina
Note 3: During saw cutting operations vacuums, brooms and other hand tools will be
used to control the slurry on the deck. Operators will monitor and limit the water
discharge to minimize slurry during cutting operations. All drains and voids will be filled
with expandable foam and monitored, and additional material(s) will be installed as
needed to contain the slurry on the deck for collection.
Note 4: Should debris escape the containment efforts on the deck the floats the debris
will be collected and removed from the river as soon as feasible. If such debris cannot
be removed without disturbing the river bottom NCDOT and USFWS will be notified, and
an effect plan will be developed for its removal.
Note 5: As stated in the narrative the demolition operation be performed on one side of
the river and then moved to the opposite side. The causeway will only be utilized on one
side of the river at any given time — at no point will there be causeway installed that will
impede more than half the flow of the river.
Note 6: During the demolition operations the plan is keep all debris within the footprint of
the bridge. As spans are demolished, we will remove (off -site) the debris as quickly as
possible. It is our desire to keep the work site as clean as possible for ease of our
operations and to prevent debris from entering the river from runoff or flooding if such
event occurs. Should it be necessary to store material in the flood plain, it will not remain
there for more than 5 days. Weather forecasts will be monitored and if there is a threat
of flooding the material will be removed from the flood plain. Note 7: During the
operations, all equipment will be staged away from the river and will not be left on the
causeway or in the immediate vicinity of the river. All fueling and servicing operations
will be performed outside of the flood plain and away from the river. If equipment
failures occur causing repairs to be performed on the causeway, near the river or in the
flood plain NCDOT will be notified, and measures will be taken to protect the site. In
addition, spill kits will be positioned on the site for use in an emergency situation.
Note 8: Upon completion of the demolition, the site will be graded to preexisting
conditions and/or as specified in the NCDOT plans.
Note 9: During operations employees will be equipped with waders and PFD's and will
be available to retrieve any debris that may fall into the river (if needed).
Note 10: Explosives will not be utilized for the demolition operations.
Primary equipment to be utilized for the demolition operations:
Husqvarna FS6000 and FS7000 flat saws
Husqvarna WS463 pump/wire saw
Komatsu PC360 excavator
Kenco Slab Crab
Link Belt 218 Crane (or equivalent)
Jonathan Randall
Smith -Rowe, LLC
October 18, 2022
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