MDT 202: Removal of Structures and Obstructions

202.01 Description

Remove and dispose of all structures and obstructions not designated to remain or to be removed and disposed of under other items of the contract.

202.02 Reserved

202.03 Construction Requirements

A.General. Retain a Blasting Consultant as required in Subsection 204.03.1 when using explosives to remove structures or obstructions. Raze, remove, and dispose of all buildings, foundations, structures, fences, debris, and other obstructions on the R/W, excluding utilities. Remove and transport specified salvage material designated to remain property of the Department, without damage, to the specified locations. Obtain the Project Manager’s written permission to use any salvaged materials. Dispose of unusable combustible material in accordance with Subsection

201.03 5(A)

. Dispose of unusable noncombustible material in accordance with Subsection 201.03.5(B). Backfill cavities caused by removing structures and obstructions level with the surrounding ground and compact the backfill in accordance with Subsection

203.03 3.

Install the necessary traffic control devices when removing and transporting structures to maintain traffic in the work area.

B.Structure Removal. Submit a written proposal that describes the proposed plan for removal and/or salvage of bridges. Do not begin removal or salvage operations prior to receiving approval. Include in the proposal a narrative of all operations, including all cutting and welding procedures, done in conjunction with the removal of the existing bridge. Include welder’s certifications and descriptions of welding processes. Approval of the plan is contingent on the plan meeting the requirements of the contract and all permits.

202.03.1 Removal of Bridges and Major Drainage Structures

A.Removal of Superstructures. Repair or replace all damaged or destroyed members, pins, nuts, and plates from steel or timber structures designated to be salvaged at Contractor expense. Match-mark all members to be salvaged with paint before dismantling. Similarly mark all pins, nuts, and plates to indicate their location in the structure. Paint all pins, pin holes, and machined surfaces with a zinc-rich paint, and wire all loose parts to adjacent members or pack in clearly marked boxes showing the contents and index-numbered for identification.

B.Removal of Substructures. Remove existing substructures and foundations located within the ordinary high-water mark to at least 3 feet (915 mm) below the existing thalweg (lowest channel bottom elevation) of the stream, or completely. Remove existing substructures and foundations located outside the ordinary high-water mark to at least to 3 feet (915 mm) below the finished grade or existing ground surface elevation, whichever is lower or according to plans. Shape and contour disturbed areas to blend with the surrounding terrain or as shown on plans. Do not damage new work while removing existing structures. 202 – REMOVAL OF STRUCTURES 2020 EDITION V5.1 AND OBSTRUCTIONS 202-2

C.Disposal of Materials Removed.

1.Structural Steel. Store salvaged structure members and all steel beams above the ground on skids at the designated sites.

2.Concrete and Masonry. Use concrete and masonry removed from old structures in backfills or approach embankments in accordance with Subsection 202.03.3. Dispose of concrete or masonry not placed in backfills or embankments at Contractor expense. Remove all contract related concrete rubble from streams.

3.Timber and Other Materials. Store all salvageable timber or other salvaged materials above ground on skids at the designated sites.

D.Disposal of Temporary Structures. Remove and dispose of all temporary structures in accordance with Subsection 202.03.1(C).

E.Removal and Salvage of Structure. Do not weld or use a cutting torch on any portion of existing bridge without an approved welding or cutting plan. Follow the requirements of Section 624 and perform no welding without the presence of the CWI. Notify the Project Manager at least 5 working days prior to welding/cutting operations for scheduling of the CWI. Assume all costs for repairs of contractor caused damage to the structure, including inspection and testing. Inspection/testing costs include salaries, travel expenses and fees for professional services by whomever the State assigns or hires to perform those services. Notify each party (as listed in contract as owner) at least 30 days prior to the anticipated date of structure removal. Keep each party informed about any changes to the removal dates. If the new owners have a transport available on site at the time of removal, set the truss and floor materials on the transport provided by the new owners. If the new owners do not provide a transport at the time of removal, set the truss and floor materials aside on site at a location as directed. If the new owners have not transported the structure off the project within 60 calendar days of removal, dispose of it unless otherwise directed by the Project Manager. Any loss or damage, suffered by the new owner of a removed bridge or by a firm or entity that is to remove the bridge on behalf of the new owner, caused by the contractor’s failure to fully comply with the provisions of this contract, will be solely the responsibility of the contractor and will be paid by the contactor, or will subject the contractor to action under its bond or insurance policy, at no expense to the State. Dispose of all non-salvageable materials in accordance with approved methods and applicable rules, laws, and regulations for disposal of solid waste. At the conclusion of the project, clean up all affected areas to the satisfaction of the Project Manager.

202.03.2 Removal of Minor Drainage Structures

Remove minor drainage structures as specified in the contract. Replace lost or damaged salvaged material at Contractor expense.

202.03.3 Removal of Pavement, Concrete, and Masonry

Remove and dispose of all existing bituminous or concrete materials to be removed unless otherwise specified. If used for new roadway construction, process, handle and transport these materials for embankments; or crush, screen, mix and process for use as base, surfacing or traffic gravel as approved. Otherwise, dispose of them as solid waste in conformance with applicable laws, rules, regulations, and the Montana Solid Waste Management Act. 2020 EDITION V5.1 REMOVAL OF STRUCTURES – 202 AND OBSTRUCTIONS 202-3 Existing materials used for base gravel or surfacing must meet the specifications for the particular item. Process bituminous material to be used as embankment to a maximum 6-inch (150 mm) size in its largest dimension. Process concrete material, to be used in the embankment, to a maximum 12-inch (305 mm) size in its largest dimension. Do not place the removed bituminous or concrete material in ephemeral drainages or within 100 feet (30 m) of standing water and groundwater wells. Bituminous materials used for embankment of the new roadway must be covered with plant mix surfacing or 12 inches (305 mm) of soil capable of supporting plant growth. Include all costs of this work in the unit price for the applicable contract item.

202.04 Method of Measurement

202.04.1 Remove Structures and Obstructions

Remove structures and obstructions is measured by the lump sum and includes the removal and disposal of all structures and obstructions encountered within the R/W.

202.05 Basis of Payment

Payment for the completed and accepted quantities is made under the following: Pay Item Pay Unit Remove Structures and Obstructions Lump Sum When the contract does not contain estimated quantities or lump sum items for removal and disposal of structures and obstructions, the work is incidental to and included in payment for other items of work.

Referenced in this section

Sections that cite this one

Removal of Structures and Obstructions in other states

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Source: Standard Specifications for Road and Bridge Construction, 2020 (v5.1) Edition. Pages 147–150 of 611. View official source ↗

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201 Clearing and Grubbing

203 Excavation and Embankment

202Removal of Structures and Obstructions

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