20241204 Charlemont C05027 Deck Replacement Special Provisions.pdf

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TECHNICAL SPECIFICATIONS

TOWN OF CHARLEMONT

BRIDGE NO. C-05-027, SOUTH RIVER ROAD OVER ALBEE BROOK

BRIDGE PRESERVATION

SPECIAL PROVISIONS TO THE

MASSACHUSETTS DEPARTMENT OF TRANSPORTATION – HIGHWAY DIVISION

STANDARD SPECIFICATIONS FOR HIGHWAYS AND BRIDGES

DIVISION II

The work on this project shall conform to the 2024 Massachusetts Department of Transportation

Highway Division Standard Specifications for Highways and Bridges, the most current version of the MassDOT Supplemental Specifications as of the bid opening date, the October 2017

Massachusetts Department of Transportation Highway Division Construction Standard Details;

1990 Standard Drawings for Signs and Supports; the 1996 Construction and Traffic Standard

Details (as relates to the Pavement Markings details only); the 2009 Manual on Uniform Traffic

Control Devices (MUTCD) with Revisions 1, 2, and 3 dated July 2022, Massachusetts

Amendments and the Standard Municipal Traffic Code; the 1968 Standard Drawings for Traffic

Signals and Highway Lighting; the latest edition of American Standard for Nursery Stock; the

Plans and these Special Provisions. The 2024 Standard Specifications; the latest editions of the

Supplemental Specifications and the Interim Supplemental Specifications shall be referred to collectively as the Standard Specifications.

The South River Road over Albee Brook Bridge Deck Replacement Project is located on a major collector road located just south of the Deerfield River and approximately 2 miles east of the intersection with West Hawley Road in the Town of Charlemont. The bridge currently does not have a posted weight limit. The deck condition is poor and the superstructure and substructure is in generally satisfactory condition. The bridge shall be closed to traffic during construction and a detour route will be signed. The current bridge abutments and wingwalls consist of concrete masonry. The work includes the removal and replacement of the existing bridge deck and related work. This work shall consist of removing and replacing the existing reinforced concrete deck slab, existing reinforced concrete safety curbs, installing the steel thrie beam bridge railing and approach guard rail, performing repairs to the existing abutments and wingwalls, and paving the bridge and approaches. The details are presented on 8 construction drawing sheets that have been reviewed and approved by MassDOT on Xxxxxxx XX, 2024. Traffic management required to perform the construction shall be as shown on the construction drawings. Payment for materials or work shown on the Plans as being part of the work to the bridge and approaches or which may be incidental to its construction and are not specifically included for payment under the Contract shall be considered incidental to the work performed. Where used within the contract documents, the terms “Department”, “Municipality”, and “Town” shall be taken to mean the Town of

Charlemont. The term “Engineer” shall be taken to mean the authorized representative or Project

Manager for the Town of Charlemont. The construction contract completion date is Xxxxxxx XX, 2025.

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Payment for materials or work shown on the Plans or as being part of the bridge preservation project which may be incidental to its construction and are not specifically included for payment under the Contract shall be considered incidental to the work performed. Where used within the contract documents, the terms “Department”, “Municipality”, and “Town” shall be taken to mean the Town of Charlemont. The term “Engineer” shall be taken to mean the authorized representative or Project Manager for the Town of Charlemont.

For the work specified under this Contract, the Contractor or Subcontractor(s) shall be prequalified by the Massachusetts Department of Transportation Highway Division (MassDOT) for the following classes of work:

Bridge Construction

Demolition

GENERAL REQUIREMENTS FOR DEMOLITION AND WORK INVOLVING

PAINTED STEEL

Demolition and work involving painted steel shall conform to the requirements of Section 961 of the

2024 Standard Specifications.

Work Involving Painted Steel

Hazardous materials shall be removed in the immediate area of any intended welding, heating, saw cutting or burning of steel. Hazardous material removal is required to allow the demolition of structural steel, railings, drainage systems, utility supports, steel lamp posts, etc.

The Contractor shall assume that the coatings on the steel contain lead (Pb), unless otherwise determined by testing. The Contractor shall certify in writing to the Engineer the results of all testing, and shall also certify that any lead (Pb) coated steel removed from the project was not reused or buried, but was sent to a scrap metal recycling facility.

Implement and maintain programs and procedures, which comply with the requirements of this specification and all applicable standards and regulations. Comply with all applicable regulations even if the regulation is not specifically referenced herein. If a state or local regulation is more restrictive than the regulation of this specification, follow the more restrictive requirements.

This requirement is intended only for the demolition and preparation prior to repair and does not include provisions for recoating of steel.

Environmental

All applicable portions of Sections 961.65 “Worker Protection” and 961.66 “Environmental

Protection and Monitoring” shall be followed when performing this work.

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During chemical stripping a hand washing facility may be used in lieu of a decontamination/changing facility.

Hazardous material shall be collected during the disassembly and disposed of as outlined in

Section 961.68 “Handling of Hazardous Waste and Reporting Release Programs”.

The applicable submittals shall be according to Section 961.69 “Submittals”.

Cleaning/Removal

Cutting Or Burning Of Steel

All surfaces to be welded, heated, saw cut or burned shall be cleaned so as to remove all contaminants and/or hazardous materials, which could be discharged to the environment as a function of the subsequent operations.

Lead paint shall be removed in its entirety in an area prescribed by a 6 inch (15 cm) minimum offset from the required work. The paint removal operation may be dry abrasive blasting, wet abrasive blasting or chemical stripping.

Proper level of containment shall be used when performing this work in accordance with Section

961.67 “Containment”. Full containment is not required during chemical stripping operation however; the Contractor shall install proper shielding and/or tarpaulins under the chemical stripping operations in order to catch all debris generated during this procedure. A cleaned area must be inspected and approved before the demolition operations are started.

During cleaning operations the Contractor shall be required to furnish and erect temporary floodlights illuminating the steel surface at a minimum of 30-foot candles. This lighting shall be used in areas where there is insufficient lighting for proper cleaning operations and inspection.

The Contractor shall supply electrical power.

The Contractor shall provide support for interim and final inspection of the bridge during cleaning operations. This support shall include the necessary traffic controls and safe access to the work.

Mechanical Disassembly Of Steel

All surfaces to be mechanically disassembled by shear cutting or removing bolts or rivets shall not require deleading. When shear cutting or removing bolts or rivets, the Contractor shall not use any method that will cause dust and/or particles to be emitted and/or dispersed into the environment to an extent that would expose the workers above the Action Levels of 30µg/m3.

For purposes of limiting the lead (Pb) dust, the Contractor will be required to dampen the lead paint work areas.

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The Contractor shall install a proper shielding and/or tarpaulins under all lead-paint-coated surfaces to be shear cut or bolts or rivets ordered removed in order to catch any loose lead paint chips, dust or particles.

PLANS AND DETAIL DRAWINGS

(Supplementing Subsection 5.02)

Plans for the existing bridge dated November 1938 and the bridge widening plans dated September

1961 are available upon request from Gill Engineering Associates. Existing conditions shown on the plans were depicted from the existing plans, field survey, and visual observations. The latest

MassDOT inspection report is also available upon request. The Contractor shall perform his/her own investigation of the existing culvert to determine its condition and details necessary for construction and base his/her bid thereon.

PROTECTION OF UTILITIES AND PROPERTY

(Supplementing Subsection 7.13)

The plans may indicate the location of existing known utilities in the vicinity of the work. Bidders are cautioned to verify this information, as its accuracy and completeness are not guaranteed in any manner.

The Contractor is responsible for the protection of vehicular and pedestrian areas on and under the culvert being worked on. The Contractor at no additional compensation (unless otherwise, provided in this Contract) shall take all necessary precautions, including the use of shielding, to protect vehicles and pedestrians from debris.

NOTICE TO OWNERS OF UTILITIES

Written notice shall be given by the Contractor to all public service corporations or officials owning or having charge of publicly or privately owned utilities attached to, or in the vicinity of the culvert, of his/her intention to commence operations and the Contractor shall at that time file a copy of such notice with the Engineer.

Before the Contractor begins any work or operations that may cause damage to any subsurface structures, he/she shall carefully locate all such structures and conduct his operations so as to avoid any damage to them.

A list of public and private utilities can be found on the MassDOT website at:

https://www.mass.gov/info-details/utility-contacts-by-district-and-municipality

Select District 1 then select the City/Town, and then locate the utility.

The utility contact list is for guidance only and is not guaranteed to be complete or up to date.

The Contractor shall be responsible for informing the following officials in each area that he/she is assigned to work in:

https://www.mass.gov/info-details/utility-contacts-by-district-and-municipality

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Sarah Reynolds, Town Administrator. Town of Charlemont: 413-339-4335, ext.8

Scott Sullivan, Town of Charlemont Highway Department Superintendent: 413-339-4335, ext.29

Police Department, Town of Charlemont - Dispatch: 413-625-8200

Fire Department, Town of Charlemont: 413-522-2705

PROTECTION OF UNDERGROUND FACILITIES

The Contractor's attention is directed to the necessity of making his own investigation in order to assure that no damage to existing structures, drainage lines, traffic signal conduits, et cetera, will occur. The Contractor shall notify Massachusetts DIG SAFE and procure a Dig Safe Number for each location prior to disturbing existing ground in any way. The telephone number of the Dig

Safe Call Center is 811 or 1-888-344-7233

PIGEON WASTE

The Contractor shall remove and disposal of the pigeon waste and any other debris accumulated on the steel members and bridge seats in areas where work is being performed. Pigeon waste and debris material contaminates will require special handling and disposal in accordance with all

Federal, state, and local requirements.

ENVIRONMENTAL PERMITTING

The Contractor is advised that a MassDEP WPA Form 2 – Determination of Applicability was issued for this project by the Charlemont Conservation Commission on November 14, 2024. A

Negative Determination was issued as the work described in the Request is within an area subject to protection under the Act, but will not remove, fill, dredge, or alter that area. Therefore, said work does not require filing of a Notice of Intent. See Attachment B.

PROVISIONS FOR TRAVEL AND PROSECUTION OF WORK

The Contractor shall notify the Town of Charlemont in writing at least two (2) weeks in advance of any proposed commencement of the work. Before starting any work under this Contract, the

Contractor shall submit a Schedule of Operations. Work on roadways shall proceed only on such sections and widths thereof as will be approved by the Town of Charlemont.

DESIGNER/ TOWN HIGHWAY DEPARTMENT

DESIGNER TOWN HIGHWAY DEPARTMENT

Daniel S. Crovo, P.E. Scott Sullivan

Gill Engineering Associates, Inc. Town of Charlemont Highway Superintendent

63 Kendrick Street 12 Factory Road

Needham, MA 02494 Charlemont, MA 01339

781-355-7100 413-339-4335

ARCHITECTURAL ACCESS BOARD TOLERANCES

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The Contractor shall be responsible for constructing all project elements in strict compliance with the current AAB/ADA rules, regulations and standards.

All construction elements in this project associated with sidewalks, walkways, wheelchair ramps and curb cuts are controlled by 521CMR - Rules and Regulations of the Architectural Access

Board (AAB).

The AAB Rules and Regulations specify maximum slopes and minimum dimensions required for construction acceptance. There is no tolerance allowed for slopes greater than the maximum slope nor for dimensions less than the minimum dimensions.

Contractors shall establish grade elevations at all wheel chair ramp locations, and shall set transition lengths accord All wheelchair ramp joints and transition sections which define grade changes shall be formed, staked and checked prior to placing cement concrete. All grade changes are to be made at joints.

ITEM 114.11

PARTIAL DEMOLITION OF SUPERSTRUCTURE LUMP SUM

Work under this Item shall conform to the relevant provisions of Subsection 112, of the Standard

Specifications and the following:

DESCRIPTION

The work under Item 114.11 includes, but is not limited to the installation of temporary protective shielding, sawcutting, removal and satisfactory disposal of the existing metal & timber bridge rail, the entire reinforced concrete safety curbs, the complete disposal of the existing reinforced concrete deck slab to the limits shown on the plans, and the removal of existing pack rust corrosion byproducts located on the top of the beam top flanges.

SUBMITTALS

TEMPORARY PROTECTIVE SHIELDING

The work done under this sub-item consists of designing, furnishing, installing, maintaining, removing and disposing of a temporary protective shielding system under the bridge. The shielding shall allow access to the areas required for the work and protect the waterway from debris and personnel on and under the bridge during the replacement of the reinforced concrete deck and safety curbs. Temporary protective shielding will be required in all areas where full depth deck removal is required between the steel beams and where the deck overhangs the exterior steel beams.

This shall be accomplished by the utilization of adequate shielding system placed beneath the superstructure of the bridge, so as not to allow any debris to pass through the shielding. The deck overhangs beyond the exterior beams shall also be shielded using a system that may include steel brackets, decking, fasteners, or an alternative support system.

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All areas under the deck shall be shielded. All shielding shall meet the following requirements:

1. The Contractor is responsible for designing, furnishing, installing, maintaining, removing and disposing (unless otherwise directed to leave in place) of all shielding.

2. The Contractor shall submit plans and computations, that shall bear the seal and signature of a Professional Structural Engineer registered in Massachusetts, of the proposed shielding to the Engineer for approval prior to its installation. The drawings shall include details of all connections, brackets and fasteners.

3. Shielding shall be designed such that impact on traffic during installation and removal shall be minimal. The Contractor shall submit his traffic plan to the Engineer for approval. No portion of the bridge deck, curbing, safety walks or other portion of the superstructure shall be removed until the Protective Shielding is completely in place and the Contractor has approval from the Engineer to proceed.

4. The shielding shall extend a sufficient distance beyond the deck overhangs at the fascias where complete deck removal is required outside the fascia beams. The shielding shall extend the entire length of the bridge span located over the waterway below. The shielding shall extend beyond the limits of the deck excavation. The Contractor may utilize the bottom flanges of the existing beams as supports for the protective shielding. However, the Contractor will not be permitted to weld onto, drill into, or cut any existing structural steel beams without the approval of the Engineer. All spaces along the perimeter of the shielding and at the seams shall be sealed to prevent dust and debris from escaping and falling onto water below the bridge.

5. The shielding shall not decrease the minimum vertical bridge clearance to the roadway or waterway below unless otherwise approved by the Engineer. Shielding shall be designed to safely withstand all loads that it will be subjected to. The allowable design stresses shall be in accordance with AASHTO Standard Specifications for Highway Bridges, 17th

Edition. The design shall also include a description of the equipment and construction methods proposed for the deck removal and also the maximum size of deck area being excavated. The shielding shall also be designed to withstand the maximum size of excavated area should it fall during excavation or removal.

The Contractor shall submit a demolition plan and schedule to the Engineer for review describing the proposed sequence, methods and equipment for the demolition and disposal of all materials.

Submittals involving proposed sequence, methods and equipment for the partial demolition of superstructure components to the limits shown on the plans shall be subject to review by the

Engineer. Such time for the checking and examination, review and approval of these submittals shall not be cause for the Contractor to claim for damages due to delay, for additional compensation, or for an extension of time for the Completion of the Contract.

The demolition procedure and any necessary calculations and drawings, including those for the design of the temporary supports, shall bear the stamp of a Professional Engineer registered in the

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Commonwealth of Massachusetts certifying that all existing structural members are suitably braced and supported The Contractor shall not proceed with demolition work until the Engineer has given written acceptance of the demolition plan.

CONSTRUCTION METHODS

The Contractor shall verify all conditions and materials in the field and shall base his bid on his own findings without any additional compensation for variance from the Plans of these special provisions regarding actual conditions for Items to be removed.

During the prosecution of the work under these Items, the Engineer may reject the use of any method or equipment which causes undue vibration or possible damage to the remaining structure or any part thereof. The noise and dust created by demolition operations must be reduced to the maximum extent possible.

The Contractor shall take all precautions necessary so as not to damage those portions of the structure that are to remain including but not limited to the steel beams, including the diaphragms, bearings, and any steel reinforcing to be retained. Any portions of the existing structure that are to remain which become damaged as a result of the Contractor’s operation, as determined by the

Engineer, shall be repaired to the satisfaction of the Engineer at no additional cost to the Town.

Additionally, the Contractor shall be responsible for maintaining portions of the existing structures, including but not limited to the existing structural steel and abutments throughout all stages of demolition and construction. The cost of any repairs to the existing structures that are required to maintain traffic shall be considered incidental to the respective item.

No demolition work shall be started until any and all utility companies involved have been notified

(not less than seven (7) days prior to the start of demolition) and the Contractor has received approval from the Engineer as to the equipment, procedures and schedule of operation to be used during the demolition and reconstruction periods. The Contractor shall carry on his work concurrently and in conjunction with the utility companies involved at the project site, so as to provide for all possible cooperation toward the satisfactory completion of the work with a minimum of delay and inconvenience. The Contractor shall be responsible for protecting any existing utility lines during his operations. If any utilities are damaged due to the Contractor’s negligence, the Contractor shall make repairs at his/her own expense.

The Contractor shall take precautions to prevent debris from falling onto the roadways or Albee

Brook below, or to encroach upon the active lanes and shoulders. The Contractor shall be required to remove any debris which is generated by demolition from the site immediately and to restore portions of the site affected by the operation to their original undisturbed condition or better.

All materials removed under Items 114.11 shall become the property of the Contractor and shall be removed from the job site, unless such materials are designated to be reused in the proposed construction.

The Contractor shall make adequate provisions for the protection of traffic, private property and pedestrians from damage and injury during all phases of the demolition process.

The Contractor shall note that the existing bridge was constructed during the period from 1931 through 1990 and the painted steel elements are therefore suspected to contain lead or lead-based

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Subsection 961 of the 2024 Standard Specifications and any supplements at the time of Bid. All hazardous materials shall be contained and disposed of in accordance with state and federal environmental regulations. The top of the top flanges of all beams to receive welded studs shall be cleaned of any paint, excessive rust or mill scale, dirt, moisture and all other foreign materials prior to welding the studs in accordance with the requirements of the AASHTO/AWS D1.5 Bridge

Welding Code.

Incidental to Item 114.11 is the removal and disposal of all existing treated wood products that may be encountered during construction of the specified work or as directed by the Engineer. The

Contractor will make his own investigation of the structure to be demolished including the materials that are part of, or which may be stored in the structure.

Existing timber products have the potential to be treated with creosote, pentachlorophenol and/or

CCA. The Contractor shall be responsible for sampling, laboratory testing, loading, transportation and disposal of the treated wood encountered while performing the specified work and all costs shall be incidental to Item 114.11 and shall be included in the Lump Sum bid price of Item 114.11.

No increase will be made to the bid price due to the nature of the materials involved in the demolition.

The Contractor is required to submit disposal manifests to the Engineer prior to the completion of the project. All aspects of this Item are to be completed in accordance with state and federal regulations.

BASIS OF PARTIAL PAYMENT

Item 114.11 will be paid for at the Contractor unit price per Lump Sum, which price shall include all labor, materials, equipment, engineering services and all incidental costs required to complete the work.

The Contractor will make his own investigation of the structure components to be demolished including the materials that are part of, or which may be stored in the structure. No increase will be made to the bid price due to the nature of the materials involved in the demolition. All costs for permits, dump fees, special handling of hazardous materials, etcetera, shall be included in the bid price of the demolition item.

The Contractor shall submit to the Engineer a cost schedule for the Partial Demolition of

Superstructure components. The acceptance of the cost schedule by the Engineer shall not be considered as a guarantee to the Contractor of the quantities assumed in developing any part of the submitted cost schedule. The schedule is only for the purposes of estimating partial payments, and it shall not affect the contract terms in any way.

The schedule on the following proposal form applies only to Item 114.11 for Bridge Structure No.

C05027. Payment for similar materials and construction included under other pay items or at locations other than at this bridge structure shall not be included under this Item. Sub-Item numbering is presented for information only in coordination with MassDOT Standard

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Nomenclature.

CLEANING ABUTMENTS & WINGWALLS

The horizontal surfaces of the abutments and wingwalls shall be swept clean of all debris, which may include but is not limited to, sand, gravel, bituminous material and bird droppings. This material shall be removed and disposed of as construction waste unless otherwise determined by the required testing as outlined in "CRITERIA FOR HANDLING OF HAZARDOUS WASTE AND REPORTING

RELEASE". When the bridge is over water the Contractor shall take all precautions necessary so as not to have any bird droppings or other debris fall into the water below.

After the debris has been removed the Contractor shall wash down the horizontal surfaces of the abutments with fresh water under pressure.

Partial Demolition of Superstructure Components Bridge No. C05027

SUB-

ITEM

DESCRIPTION

QTY UNIT UNIT

PRICE

TOTAL

127.1 REINFORCED CONCRETE

DECK EXCAVATION

24 CY

960.13 CLEAN TOP OF BEAM TOP

FLANGES

160 SF

974.31 METAL & TIMBER BRIDGE

RAILING REMOVED

113 FT

994.1 TEMPORARY PROTECTIVE

SHIELDING

60 SY

TOTAL COST OF ITEM 114.11 =

ITEM 127.12 REINFORCED CONCRETE CUBIC YARD

SUBSTRUCTURE EXCAVATION

The Work shall conform to the relevant Provisions of Section 120 of the Standard Specifications and the following:

The work under this Item consists of the removal and disposal of all deteriorated, spalled, and scaled concrete as required to repair the existing concrete substructure elements to the general lines identified on the drawings and as directed by the Engineer. In addition, the existing backwalls are to be excavated to the limits shown on the plans in order to allow the proposed bridge deck to extend over the sawcut backwall. The Contractor shall establish limits of the repairs as shown on the plans and at the direction of the Engineer. The locations shown on the plans are based on bridge inspection records and are not guaranteed. The Contractor shall sound all substructure concrete surfaces to determine the limits of concrete delamination and deterioration. The location and extent of all concrete repairs

(12/4/2024) -11 are to be field verified and approved by the Engineer after the Contractor has sounded and marked out the repair areas. The limits of the repairs may be extended as directed by the Engineer when chloride content testing indicates chloride contamination of concrete that is not delaminated.

During the prosecution of the Work, the Engineer may reject the use of any method or equipment, which causes undue vibration or possible damage to the structure or any part thereof. Pneumatic hammers heavier than the nominal 25 pounds mass (Chicago Pneumatic No. 111 or equal) shall not be used, unless approved by the Engineer.

The temporary shielding shall be designed by a Registered Professional Engineer and installed by the

Contractor. Compensation for the design and construction of this temporary shielding shall be considered incidental to this contract payment item.

Minimum depth of excavation to sound concrete shall be 1” beyond the inner most layer of reinforcing steel but not less than 4” from the original surface. The Contractor shall stop excavating deteriorated concrete when the depth of excavation reaches 6” and shall notify the Engineer immediately. The edges of the patch shall be cut to neat lines by saw cutting to a depth of ¾ inch and the patch areas shall be made rectangular in shape, if possible, with horizontal and vertical edges and square corners.

The Contractor shall take all precautions necessary so as not to damage those portions of the work including reinforcing steel that are to remain. This includes determining the concrete cover to the steel bars at the edge of each patch prior to excavating concrete. Any steel that is unsuitable for further use through no fault of the Contractor shall be replaced under Item 910.1 Steel

Reinforcement for Structures – Epoxy Coated. All reinforcing steel that is loose shall be tied tightly together using wire ties.

The Contractor shall take all precautions necessary so as not to damage those portions of the Bridge including reinforcing steel that are to remain.

Also included under this Item are all costs in connection with the cleaning, cutting, and bending of the existing reinforcing steel designated to be retained in the proposed repair. Exposed reinforcing steel shall be cleaned by mechanical cleaning and high pressure water that contains no detergents of bond inhibiting chemicals. Where active corrosion has occurred, the steel shall be abrasively blast cleaned to a near white metal finish. After concrete edge preparation and excavation is complete, all dirt, grease, and loosely bonded aggregate shall be removed by high pressure water blasting that contains no detergents or bond inhibiting chemicals.

PREPARATION FOR PLACEMENT OF NEW CONCRETE

After the surface preparation has been accepted, the existing concrete surfaces to receive the repair concrete shall be pre-wetted with clean potable water for 24 hours. This may be accomplished by continuous wetting with soaker hoses or the use of burlap/burlene, etc. where moisture can be maintained. If, in the opinion of the Engineer, conditions or the situation prohibits this, then the surfaces shall be wetted for as long as possible. Surfaces must be wetted by a means acceptable to the Engineer using potable water.

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The Contractor shall remove any puddles of free-standing water with oil-free compressed air, and protect the surfaces from drying, so the existing concrete remains in a clean, saturated surface dry condition until placement of the new concrete.

The Contractor shall take all measures necessary to protect pedestrian, vehicular, and railroad traffic from his/her construction operations. No debris, tools, or incidental equipment of any kind will be permitted to fall into areas of river bed, river bank, or where vehicular or pedestrian traffic exists. Any material that accidentally falls into such areas shall be removed immediately.

DISPOSAL OF EXCAVATED MATERIALS AND SITE CLEANING

Surplus materials obtained from any type of excavation, and not needed for further use, as determined by the Engineer shall become the property of the Contractor and shall be properly disposed of by the Contractor outside the location at no additional compensation.

The Contractor is required to broom clean all work site areas after the removal of excavated debris regardless of preexisting conditions. This includes areas under the excavated repair area such as at river bed, river bank, or revetment areas. Removal of debris, site cleaning, and disposal of debris is incidental to the Contract and no additional payment will be made.

METHOD OF MEASUREMENT AND BASIS OF PAYMENT

Item 127.12 will be measured and paid at the Contract unit price per Cubic Yard of substructure concrete excavated, removed and properly disposed. The Contract price shall include all labor, tools, equipment and incidental work necessary to complete the work, and final disposal of the excavated material necessary to complete the work as required by the Engineer.

ITEM 151. GRAVEL BORROW CUBIC YARD

The work under this item shall conform to the relevant provisions of Section 150 of the Standard

Specifications and in close conformity with the lines and grades shown on the plans.

Gravel borrow conforming to material specification M1.03.0 Type B shall be used for the roadway subbase where the existing base material is unsuitable as determined by the engineer.

ITEM 460.22 SUPERPAVE SURFACE COURSE – 9.5 (SSC) – 9.5) TON

ITEM 460.31 SUPERPAVE INTERMEDIATE COURSE – 12.5 (SIC) – 12.5) TON

HMA pavement courses applied on the bridge shall consist of a Superpave Intermediate Course, placed first, followed by the Superpave Surface Course. The maximum amount of Recycled

Asphalt Pavement (RAP) used in HMA pavement courses for bridge decks shall not exceed 15%.

All Superpave Intermediate and Surface Course mixtures placed on the bridge shall be treated with an approved anti-stripping compound as specified under Subsection 450.30: General. The addition of anti-strip incorporated in the mixes shall be in accordance with the anti-strip Manufacturer’s recommendation.

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The Superpave Intermediate and Surface Course mixtures to be placed on the bridge only after the membrane waterproofing, gravel borrow fill, safety curb concrete and deck concrete, are in place.

The Superpave Intermediate mix shall be placed on the bridge within 24 hours after the membrane waterproofing has been placed. No vehicular traffic shall be permitted over any bare membrane waterproofing. Equipment used for placement and compaction of the Superpave Intermediate and

Surface Courses on the bridge shall be sufficient to place the HMA mixture at the required grade, cross-slope, thickness, and in-place density without damaging the underlying membrane waterproofing. Rollers will not be allowed to use the vibratory function when compacting the mat.

Rollers operated in oscillatory mode may be permitted.

All other provisions contained in Section 460 of the 2024 Standards, including method of measurement and payment, shall apply to this project.

ITEM 627.01 ROUNDED END UNIT EACH

The Rounded End Unit (previously known as terminal end section, single faced) shall comply with the Rounded End Unit shown in the MassDOT Construction Standard Detail 400.4.1.

ITEM 657. TEMPORARY FENCE FOOT

The work under this Item shall conform to the relevant provisions of Subsection 644 of the

Standard Specifications and the following:

The work shall include furnishing, installing, adjusting, and resetting, and subsequently removing a temporary chain link fence across the access to the work area as necessary for safety and security, and as required by the Engineer.

All posts, including end, corner and intermediate brace posts and all access/egress gates and gate posts shall be included in the linear foot cost. The fencing height shall be 72 inches minimum.

Material need not be new, but shall not be deteriorated nor in any way jeopardize the security purposes intended. All fencing materials shall meet the approval of the Engineer.

Fence fabric shall be placed on the face of the post away from the work area. The top edge of the fabric shall be finished with a “Knuckled” selvage.

A 48” x 30” sign, conforming to the relevant provisions of Subsection 852, shall be mounted on each gate. The sign legend shall be 8”-high, bold-red font, printed on white background, and shall read as follows:

DANGER

AREA CLOSED TO VEHICLE, BICYCLE, AND PEDESTRIAN TRAFFIC

It may be necessary to remove and reset sections of temporary fence at times during construction to accommodate construction operations. This shall be considered incidental to the work.

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The Contractor shall be responsible for maintenance of the temporary fence; be responsible and cognizant that it remains secure, and that the area is always sealed off to the public. Fence gates shall always be secured closed with a padlock and chain while the Contractor is not on site.

METHOD OF MEASUREMENT

Item 657. will be measured per Foot of temporary fence installed, complete in place.

BASIS OF PAYMENT

Item 657. will be paid for at the Contract unit price, per Foot. This price shall include all labor, tools, materials, equipment, repair, restoration, or replacement of any damaged fencing, removal and disposal of the fence upon the completion of the project, and all incidental costs required to complete the work.

ITEM 751.7 COMPOST BLANKET CUBIC YARD

The work under this Item shall conform to the relevant provisions of Subsection 751 and M1.06.0

Organic Soil Additives of the Standard Specifications and the following:

Work shall consist of furnishing and pneumatically applying compost as a thin mulch blanket (1/2-

1 inch depth) over prepared soil to provide temporary soil stabilization and organic matter for plant growth.

SUBMITTALS AND MATERIALS

No materials shall be delivered until the required submittals have been approved by the Engineer.

Delivered materials shall match the approved samples. Approval of test results does not constitute final acceptance.

Contractor shall submit to the Engineer samples and certified test results no sooner than 60 days prior to application of compost. Vender certification that material delivered meets the test results shall be submitted if requested.

Compost may be a blended product of compost and fine wood chips. No kiln-dried wood, construction debris or ground palette is allowed. Material shall meet the following criteria:

- Organic matter content shall be minimum 30 percent (dry weight basis)

- Moisture content shall be 30-60 percent (wet weight basis)

- Bulk Density <1000 lb/cy

- pH shall be 5.5-7.5

- Conductivity shall be a maximum of 4 mmhos

- Stability test shall produce a maximum of 8mg CO2-C/gram of organic material per day

- Particle size shall not exceed ¾ inch

- Compost may be a blended product of compost and fine wood chips.

Compost testing shall be by a laboratory approved by the US Compost Council using the Testing

Method for the Examination of Compost and Composting (TMECC) protocols.

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The Engineer shall approve the Contractor's equipment for application.

Application of compost material shall not begin until the Engineer has approved the site and soil conditions. Soil preparation shall be as specified under the applicable item for soil placement or for seeding. The Contractor shall notify the Engineer when areas are ready for inspection and application of compost.

Compost blanket shall be pneumatically applied (blown on) to a minimum depth of one half to one inch. Where shown on the plans or when directed by the Engineer depth may be increased to provide berms for sediment control or to otherwise prevent slope erosion.

When compost blanket is proposed with seeding, seed shall be broadcast and shall occur in conjunction with compost blanket, as specified under the relevant item for seeding.

When compost blanket is proposed for areas with planting, compost (and seed if applicable) shall be applied after planting. If compost and seed occur prior to planting, areas shall be regraded and compost and seed reapplied to the satisfaction of the Engineer and at the Contractor’s expense.

Item 751.7 will be measured and paid for at the Contract unit price per CubiYard which price shall include all labor, materials, equipment, and all incidental costs required to complete the work of pneumatically applying compost.

Surface preparation of substrate receiving compost blanket shall be compensated under the applicable item for placement of loam, sand, ordinary borrow, wetland soil, topsoil rehandled and spread, tilled existing soil, or other specified substrate.

Seeding will be compensated for under the appropriate seeding items.

ITEM 767.121 SEDIMENT CONTROL BARRIER FOOT

The work under this item shall conform to the relevant provisions of Sections 670, 751, and 767 of the

Standard Specifications and shall include the furnishing and placement of a sediment control barrier.

Sediment Control Barrier shall be installed prior to disturbing upslope soil. The purpose of the sediment control barrier is to slow runoff velocity and filter suspended sediments from storm water flow. Sediment barrier may be used to contain stockpile sediments, to break slope length, and to slow or prevent upgradient water or water off road surfaces from flowing into a work zone. Contractor shall be responsible for ensuring that barriers fulfill the intent of adequately controlling siltation and runoff.

Twelve-inch diameter (after installation) compost filter tubes are intended to be the primary sedimentation control barrier.

For small areas of disturbance with minimal slope and slope length, the Engineer may approve the following sediment control methods;

Straw tubes/wattles which shall be trenched, Straw bales which shall be trenched. Additional barriers

(adding depth or height) shall be used at specific locations of concentrated flow such as at gully points, (12/4/2024) -16 steep slopes, or identified failure points in the sediment capture line. Where specified or required by permits, silt fence shall be used in addition to compost filter tubes or straw bales and shall be incidental to this item.

MATERIALS AND CONSTRUCTION

Prior to initial placement of sediment control barriers, the Contractor and the Engineer shall review locations specified on the plans to ensure that the placement will provide maximum effectiveness.

Barriers shall be staked, trenched, and/or wedged as specified herein and shall be securely in contact with existing soil such that there is no flow beneath the barrier.

COMPOST FILTER TUBE

Compost material inside the filter tube shall meet M1.06.0, except for the following: no manure or bio-solids shall be used; no kiln-dried wood or construction debris shall be allowed; material shall pass through a 2-inch sieve; and the C:N ratio shall be disregarded. Outer tube fabric shall be a knitted mesh with 1/8 -

3/8” openings and made of 100% biodegradable materials (i.e., cotton, hemp or jute). Compost filter tubes shall be a minimum of 12 inches in diameter installed. Tubes shall be placed, filled, and staked in place as required to ensure stability against water flows. All tubes shall be tamped, but not trenched, to ensure good contact with soil. Where reinforcement is necessary, additional tubes shall be installed as shown on the plans.

STRAW BALES

Straw bales shall conform to the requirements of Section M6.04.3 of the Standard Specifications and the following:

Bales should be a minimum size of 12 x 16 x 36 inches and shall be placed in a single row, lengthwise on the contour, with ends of adjacent bales tightly abutting one another. The bales shall be trenched and backfilled. The trench shall be excavated the width of the bale and the length of the proposed barrier to a depth of 4 inches. After the bales are staked the excavated soil shall be backfilled against the barrier.

Backfill soil shall conform to the ground level on the downhill side and shall be built up to 4 inches against the uphill side of the barrier.

STRAW WATTLE

Straw wattle shall be a minimum of 12 inches in diameter. Straw filling shall conform to the requirements of Section M6.04.3, shall be encased in durable netting, and shall have a density of 3 lb/foot. Straw wattle shall be trenched in 3 inches deep and staked according to the plans. The wattles shall be sufficiently secure on the upstream side to prevent water flowing underneath the wattle.

SILT FENCE

Materials and Installation shall be per Section 670.40 of the Standard Specifications and the following:

Silt fence shall be used when specified by Orders of Condition or other permitting.

When used with compost filter tubes, the tube shall be placed on a minimum of 8 inches of folded fabric on the upslope side of the fence. Fabric does not need to be trenched.

When used with straw bales, an 8-inch deep and 4-inch wide trench or V-trench shall be dug on the upslope side of the fence line. One foot of fabric shall be placed in the bottom of the trench followed by backfilling with compacted earth or gravel. Stakes shall be driven 16 inches into the ground on the down slope side of the trench and shall be spaced such that the fence remains vertical and effective.

Width of fabric shall be sufficient to provide a 36-inch high barrier after fabric is folded or trenched.

Sagging fabric will require additional staking or other anchoring.

MAINTENANCE

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Barriers shall be inspected after each rainfall and at least daily during prolonged rainfall. Contractor shall remove accumulated sediments when they reach one half the height of the barrier or sediment fence.

The Contractor shall immediately correct all deficiencies, including, washouts, overtopping, clogging due to sediment, and erosion. The contractor shall review location of barriers in areas where construction activity causes drainage runoff so as to ensure that the barriers are properly located for effectiveness. Where deficiencies exist, such as overtopping or wash-out, additional staking or additional barriers shall be installed as required by the Engineer.

At specific locations, such as at gully points, steep slopes, or identified failure points in the sediment capture line, barriers shall be reinforced as required by the Engineer. Such reinforcing shall be incidental to the cost of this item and shall not exceed 10 percent of the overall length of barrier required for the project.

Barriers that are decomposing, cut, or otherwise compromised shall be repaired or replaced as directed by the Engineer. Repair and/or replacement shall be incidental to this item.

DISMANTLING & REMOVING

Barriers shall be dismantled and/or removed when construction work is complete and when site conditions are sufficiently stable to prevent surface erosion and after receiving permission to do so from the Engineer.

For all instances, all nonbiodegradable material, including photobiodegradable fabric, plastic netting, nylon twine, and silt fence shall be removed and disposed off-site by the Contractor regardless of site context.

For naturalized areas, biodegradable, natural fabric and material shall be left in place to decompose on-site unless required otherwise by the Engineer. Compost filter tubes may be left as they are with stakes removed.

Hay bales shall be broken down and spread evenly. All nylon or nonbiodegradable twine shall be removed along with silt fence. Wooden stakes may be left on site, placed neatly and discretely.

Dismantling, removal, and seeding shall be incidental to this item.

METHOD OF MEASUREMENT AND BASIS OF PAYMENT

This item will be measured and paid for at the Contract unit price per foot which price shall include all labor, equipment, materials, maintenance, dismantling, removal, restoration of site, silt fence if required, and incidental costs required to complete the work.

ITEM 905.01 5000 PSI, 3/8 INCH, 710 HP CEMENT CONCRETE CUBIC YARD

FOR SUBSTRUCTURE REPAIRS

Work performed under this Item shall be performed in accordance with Section 901 of the Standard

Specifications, and the following:

Work under this item shall consist of forming, providing, placing, and consolidating 5000 PSI, 3/8

Inch, 710 HP Cement Concrete to perform abutment, wingwall caps, and wingwall repairs, as directed by the Engineer.

The Contractor shall obtain the approval of the Engineer that all concrete substructure excavation has been performed in accordance with the requirements of Item 127.12 prior to placing substructure repair concrete. The existing concrete substructure surfaces shall be abrasively blast cleaned and pre-wetted for a minimum of 24 hours prior to placing substructure repair concrete.

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The substructure repair concrete shall be properly consolidated by inserting 1” nominal head diameter pencil vibrators in openings at the tops of the forms at a maximum spacing of 1½ times the radius of action of the vibrator used. The slump of the concrete at discharge shall be increased to 6” to 7” in order to facilitate proper consolidation. Increasing the slump by addition of mixing water in excess of the amount contained in the MassDOT approved mix design shall not be permitted. The mix shall contain superplasticizer conforming to AASHTO M 194 Type F or G, which shall be added in accordance with the concrete technician’s recommendations. The amount of superplasticizer added to the cement concrete shall be recorded on the delivery slip. The delivery slip shall be signed by the concrete technician. The concrete technician shall be either an ACI

Certified Concrete Technician (minimum Grade I - Field) or a New England Transportation

Technician Certification Program - Certified Concrete Technician.

METHOD OF MEASURMENT AND BASIS OF PAYMENT

Item 905.01 will be measured and paid at the Contract Unit Price per Cubic Yard of substructure repair concrete provided, placed, and consolidated. This payment shall be considered full compensation for all labor, tools, equipment, formwork, materials and all incidental items of work necessary to satisfactorily complete the repairs.

ITEM 909.2 CEMENTITIOUS MORTAR FOR PATCHING

SQUARE FOOT

The Work to be done under this Item shall consist of chipping away deteriorated concrete and placing an approved polymer modified cementitious patching compound to the concrete bridge substructure for Bridge No. C05027 to the limits as shown on the Plans or as determined by the

Engineer.

This item is for the repair of deteriorated or spalled areas that are no more than 1½" in depth for horizontal and vertical applications. Repairs that are deeper than 1 ½" shall be repaired and paid for under Item 905.01, 5000 PSI, 3/8 Inch, 710 HP Cement Concrete.

The procedure to be used to repair deteriorated or spalled concrete shall be as follows:

The Contractor shall remove all deteriorated or spalled concrete in the areas as shown on the Plans or as designated by the Engineer.

All deteriorated or spalled concrete designated to be removed is incidental and shall be included in the Unit Bid Price for this Item.

The Contractor shall have…