IFB # MW 2027 PW1 Due Date: 0ctober 8, 2026 at 3:00 PM

Public Works Services and Materials

Invitation for Bids (IFB)

MW 2027 PW1

For

Specifications

Metropolitan Area Planning Council (MAPC)

On behalf of the Metro West Regional Services Consortium

Representing the following municipalities:

Ashland, Hopkinton, Millis, Natick, Needham, Sherborn, Southborough, Wellesley

Table of Contents General Specifications

Item 1 Roadway Management Services

Item 6 Pavement Markings

Item 7 Guardrail

Item 9 Catch Basin Cleaning

Item 10 Earth Materials

Item 14 Sidewalks

General Specifications Unless otherwise noted in these specifications, all materials and work under any resulting contract or contracts shall be in conformance with the latest Editions of:

• MassDOT Standard Specifications for Highways and Bridges, Supplemental Specifications, and

Standard Special Provisions

• MassDOT Construction and Traffic Standard Details

• U.S. Department of Transportation Manual on Uniform Traffic Control Devices (MUTCD)

• MassDOT Wheel Chair Ramp Standard

• The American Water Works Association’s Standard for the Installation of Ductile-Iron Water

Mains and Their Appurtenances

• MassDOT Standard Drawings for Signs and Support

Item 1 Roadway Management Services

GENERAL INFORMATION

General Eligibility Criteria

Bidders must be pre-qualified by the Massachusetts Department of Transportation Highway

Division (MassDOT)) to bid on this project. Pricing

Bid Item numbers reference MassDOT Standard Specifications Numerical Index of Payment Items.

Mobilization and safety signage for construction operations shall be considered part of, and should be included as, part of every item.

Normal Hours of Work shall be between the hours of 7:00 AM and 4:00 PM, Monday through Friday, unless otherwise specified. Work shall not be performed on Saturdays, Sundays, Holidays or other than during Normal Hours of Work without express authorization of and direction from the Municipal

Party's Authorized Representative as identified in the Contract documents.

Night work may be required when the traffic volume is lower. The hours of night work are limited from 9:00 p.m. to 5:00 a.m. Nightime prices should be reflected in the bid unit prices. The bid items that may involve some or all night work are:

120.1 - Unclassified Excavation

129 - Pavement Milling by Cold Planner

202 - Precast Reinforced Concrete Drain Manhole

241.12 - 12” Reinforced Concrete Drainage Pipe

241.15 - 15” Reinforced Concrete Drainage Pipe

241.24 – 24” Reinforced Concrete Drainage Pipe

252.24 - 24” High Density Polyethylene Drainage Pipe (HDPE)

450.90 – Contractor Quality Control

452 – Asphalt Emulsion For Tack Coat

453 – Hot Mix Asphalt Joint Sealant

455.23 – Superpave Surface Coarse – SSC 12.5

472 – Hot Mix Asphalt for Miscellaneous Work

854.014 – Temporary Pavement Markings 4-Inch Painted

864.04 – Pavement Arrows and Legends Reflectorized White (Thermoplastic)

866.04 – Four (4) inch Reflectorized White Line (Thermoplastic)

866.12 – Twelve (12) Inch Reflectorized White Line (Thermoplastic)

867.04 – Four (4) Inch Reflectorized Yellow Line (Thermoplastic)

Bituminous concrete prices shall include all costs associated with producing, delivering, applying and finishing the work, unless otherwise specified.

Tonnages shall be based upon weight slips specific to each load presented to and signed by the

“DPW Agent” at the time and site of application. Only automated printed tonnage slips will be accepted.

The “DPW Agent” is the person authorized to act on behalf of the Town in relation to the performance of work subject to this specification. Such person(s) may vary in name and title from day to day, but shall always be whoever is designated by the Public Works department head and made known to the Contractor.

Quantities measured other than by weight are subject to signed verification of the DPW Agent.

Renting Equipment

Prices for hourly rental of work-related machinery, operator and fuel are called for in anticipation of unforeseen circumstances that may arise necessitating the use of special equipment to work in conjunction with Town forces. Such rentals are not to be included with Unit Bid Prices that total into the Award amount.

Direction and Oversight of the Work

All supervision and direction of the Work, all authorizations of variance from specifications, and all field decisions of the Town shall be communicated to the Contractor by the DPW Agent, also referred to as the “Town”.

Miscellaneous Provisions

The Member Municipalities will pay for police traffic safety and fire details that may be required.

The Contractor will make every effort to avoid damaging abutting property. The Contractor will restore such property damaged by his equipment or personnel to its pre-damage condition, or if so determined by the Town, restoration will be done by others at the Contractor’s expense.

WORK SPECIFICATIONS

Location of Project

The work to be performed is located in various areas throughout the Metro West region [Ashland, Hopkinton, Millis, Natick, Sherborn, Southborough, and Wellesley].

Scope of Work

The work under this contract consists of furnishing all necessary labor, materials, equipment and services to complete roadway improvements. Work includes, but is not limited to mobilization;

pavement reclamation; grading and/or relocating sections of existing roadway; earth excavation;

installing, adjusting, and/or remodeling drainage, sewer & water structures; installation of bituminous concrete pavement, berm, sidewalks; installation of concrete sidewalks; line painting;

crack sealing; landscaping; and other miscellaneous and incidental work items necessary to complete the work.

All materials and work under this contract shall be in conformance with the latest Editions of:

• Massachusetts Department of Transportation’s (MassDOT) Standard Specifications for Highways and Bridges, Supplemental Specifications, and Standard Special Provisions;

• Construction and Traffic Standard Details;

• The Manual on Uniform Traffic Control Devices;

• Massachusetts Department of Transportation’s (MassDOT) Wheel Chair Ramp Standard;

• The American Water Works Association’s Standard for the Installation of Ductile-Iron Water

Mains and Their Appurtenances;

• The Standard Drawings for Signs and Support;

• MassDOT Constructions Details for Handicap Ramps and Bituminous Concrete Berm; and, the following Special Provisions.

All materials and work under this contract performed for the Town of Wellesley Washington Street

Reconstruction shall also conform with the Wellesley Special Provisions for Washington Street

Reconstruction contained herein.

SPECIAL PROVISIONS

DIVISION I - GENERAL REQUIREMENTS AND COVENANTS

SUBSECTION 5.07 CONSTRUCTION (STAKES) STAKINGS

Replace this entire subsection with the following:

The Town will furnish general benchmark control for the project.

The Contractor, at his/her own expense, will furnish the following survey work:

A. Establishment of base lines or centerlines of construction for main roadways, ramp service roads, side streets and other major dry land items. Reproduction of base lines and centerlines, or lines offset to them when roadway cuts and fills have been completed. Levels may be taken on the points marking these lines.

B. Original grade stakes at 50' intervals giving finished grades as per plan.

C. Preliminary and final surveys of pits (if borrow is paid by pit measure) and dredging areas, semifinal cross sections on ledge, peat, loam, etc.

D. Control for structures, which shall consist of range lines on centerline of bearings or centerline of piers, face of abutments and wingwalls, horizontal and vertical control for beam seats, along with benchmarks close to structures for vertical control. Structures shall include but shall not be limited to bridges, culverts, dams, buildings and walls.

E. Control for alignment of curbing or edging on ramps and at other complicated locations.

F. Bound points and sideline stakes.

G. All necessary stakes for pipes and head walls, and establish all catch basin and manhole locations as to line and grade.

The Contractor shall employ qualified engineering personnel to insure adequate control and shall furnish and set stakes of the quality used by the Department for control staking. Rough stakes may be used to denote top and bottom of slopes, edge of pavement, gutter lines, etc.

The Contractor shall furnish and set, at his/her own expense, all stakes (such as batter boards, slope stakes, pins, offset stakes, etc.) required for the construction operations and he shall be solely responsible for the accuracy of the line and grade of all features of his/her work.

The Contractor shall be held responsible for the preservation of all stakes and marks. If any of such stakes or marks are disturbed or destroyed the cost of replacing them shall be at the contractor’s expense.

SPECIAL PROVISIONS

DIVISION II – CONSTRUCTION DETAILS

SECTION 101 CLEARING AND GRUBBING

SUBSECTION 101.61 CLEARING AND GRUBBING

Add the following at the end of this subsection:

The Contractor may use any equipment, materials or labor as he deems necessary, with no additional measurement or payment to be made.

SUBSECTION 101.81 BASIS OF PAYMENT

Add the following after the first sentence of this subsection:

There shall be no separate payment for clearing and grubbing, payment for such work shall be included in Item 120, Earth Excavation.

SECTION 120 EXCAVATION

SUBSECTION 120.21 EARTH EXCAVATION

Add the following at the end of the second paragraph:

Earth excavation shall also include as incidental to the general work, the removal and disposal of structures, pipes, gate boxes, service boxes, fences, or other items not paid for separately within the contract.

SUBSECTION 120.66 ASPHALT PAVEMENT EXCAVATION BY COLD PLANER Add the following to the end of the subsection:

Keyways shall transition from a reveal of 1 1/2” to 0” and have a width varying between 4’ to

10’ as directed by the resident engineer. Keyways shall be cut after binder course is laid.

Excess scarified and reclaimed material will become the property of the contractor and will be disposed of off-site. The Contractor will be responsible for damage to existing castings resulting from his operation unless such castings (water gates e.g.) have previously been paved over and are therefore not visible on surface.

SUBSECTION 120.82 PAYMENT ITEMS

Add the following payment item in numerical order:

ITEM 129.1 Asphalt Pavement Excavation by Cold Planer (Keyways) Square Yard

Insert the following new section in numerical order:

SECTION 130 STREET SWEEPING DESCRIPTION

SUBSECTION 130.20 GENERAL

Street sweeping shall be by mechanical street sweeper vehicle to clear the paved surface of all debris, to the extent as determined by the Engineer.

CONSTRUCTION METHODS

SUBSECTION 130.60 GENERAL

The timing of the street sweeping operation should be such that the road remains sufficiently clean between the completion of the sweeping and the start of any reclamation and/or repaving. Should the Engineer decide that the road surface requires additional sweeping no additional compensation shall be offered the Contractor to complete this process.

No additional compensation will be allowed when street sweeping operations are used as a means of clearing off and/or exposing areas of pavement covered with vegetation or debris.

SUBSECTION 130.61 DISPOSAL

All material collected from the street sweeping process shall be disposed of by the contractor outside and away from the limits of the project with no additional measurement or payment to be made.

COMPENSATION

SUBSECTION 130.81 BASIS OF PAYMENT

There shall be no separate payment for street sweeping. Payment for such work shall be included in the various hot mix asphalt items. SECTION 140 EXCAVATION FOR STRUCTURES

SUBSECTION 140.62 CLASS B ROCK EXCAVATION Add the following at the end of this subsection:

The Contractor shall conduct his operations so that no disturbance or damage shall be done to utilities, wells, equipment, buildings, or structures, and shall be fully responsible for determining the methods and controls necessary to do so.

If blasting is used for rock excavation, the following requirements shall be adhered to:

1. The Contractor shall conduct a preconstruction survey prior to the start of any test blasting or blasting. The Contractor shall engage the services of a recognized and acceptable vibration/blasting consultant and other experts, who shall have a minimum of

10 years experience in their specialty, to conduct a preconstruction survey.

The preconstruction survey shall be made of all properties, buildings, and other structures and utilities within 100 ft. of the centerline of the trench, where blasting is used. At a minimum, six 8 inch by 10 inch glossy color photographs shall be taken by a professional photographer at each structure in the preconstruction survey area. Three copies of each photograph shall be submitted to the Engineer 21 days prior to the start of any blasting work.

2. Prior to production blasting, the Contractor shall employ an acceptable, independent, vibration/blasting consultant to conduct test blasting to develop control procedures for production blasting so that no disturbance or damage shall be done. The vibration/blasting consultant shall be a Registered Professional Engineer in the

Commonwealth of Massachusetts and shall have a minimum of 10 years experience as a vibration/blasting consultant. The Contractor shall submit the name of the vibration/blasting consultant to the Engineer prior to starting the work.

3. Based on the results of the test blasting, the vibration/blasting consultant shall develop a suitable blasting program and distance-quantity of explosive tables for the production blasting. The blasting program and the distance-quantity tables shall be submitted to the

Engineer 21 days prior to the commencement of production blasting. All production blasting operations shall be in accordance with the blasting program.

4. The vibration/blasting consultant shall also perform continuous monitoring of all blasting operations. Blasting shall be monitored with a minimum of two 3 component seismometers that record the entire particle velocity wave train and not just peak velocities. Accurate, legible seismometer records of all monitored blasts shall be obtained and one copy of all blast records shall be submitted to the Engineer within 7 days after blasting. Peak particle velocities exceeding 2-inch per second at a distance of

50-feet from the centerline of the trench will not be permitted.

If evidence of disturbance or damage to any utility, well, equipment, building, or structure is observed or reported to the Contractor, he shall immediately notify the Engineer, and all blasting operations shall be discontinued, and the Contractor's vibration/blasting consultant shall recommend revised blasting procedures. Blasting may then continue following revised blasting procedures.

The Contractor shall be fully responsible for the restoration or replacement of all utilities, wells, equipment, buildings, or structures damaged by his operations at no cost to the

Owner.

A Town Fire Detail shall be present on site during all blasting operations, as well as any time explosives are on site, as stated in Subsection 850.38.

SUBSECTION 140.81 BASIS OF PAYMENT

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The minimum bid for Class B Rock Excavation shall be $35.00 per cubic yard and shall be considered full compensation for all work associated with Class B Rock Excavation, including pre-construction survey and monitoring program, blasting, and all other work associated with the excavation and disposal of the rock.

SECTION 150 EMBANKMENT

SUBSECTION 150.64 BACKFILLING FOR STRUCTURES AND PIPES, (A. GENERAL) Replace the 2nd sentence of this subsection with the following:

When suitable backfill material cannot be obtained from excavation, gravel borrow shall be used.

SUBSECTION 150.64 BACKFILLING FOR STRUCTURES AND PIPES, (C. PIPES) Replace the last paragraph of this subsection with the following:

In all cases the filling material shall be thoroughly compacted by means of a mechanical compactor. In addition, compaction testing will be done by the Town on each 6-inch lift with a minimum compaction of 95% of dry soil density based on ASTM D1557 Modified Proctor

Analysis. Said testing will be done by nuclear densometer in accordance with ASTM D2922.

The Town shall cover all costs associated with the actual testing of the material. No compensation shall be made for any delays due to compaction testing.

SUBSECTION 150.80 METHOD OF MEASUREMENT

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Crushed Stone (¾”) when used for pipe bedding shall be included in the item price for the associated pipe, with no separate measurement or payment.

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SECTION 153 CONTROLLED DENSITY FILL

SUBSECTION 153.20 GENERAL

Excavatable Controlled Density Fill (CDF) shall be used as backfill material in utility trenches, abandoned structures and other locations as determined by the Engineer.

SUBSECTION 153.40 MATERIALS

Materials shall meet the requirements specified in the following subsection of Division III, Materials:

Controlled Density Fill, Type 2E M4.08.0

SUBSECTION 153.60 CONSTRUCTION METHODS

Controlled Density Fill shall be placed in a manner such that no damage will occur to utility lines, pipes or structures. The material shall be placed so that no voids are left upon completion of the backfilling process.

SUBSECTION 153.80 METHOD OF MEASUREMENT

Controlled Density Fill shall be measured in place by the cubic yard.

SUBSECTION 153.81 BASIS OF PAYMENT

Payment for Controlled Density Fill will be paid for at the contract unit price per cubic yard.

No additional compensation shall be offered for material placed beyond the limits of excavation as shown in the plans or as determined by the Engineer.

SUBSECTION 153.82 PAYMENT ITEMS

ITEM 153 Controlled Density Fill – Excavatable Cubic Yard

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SECTION 187 REMOVAL AND DISPOSAL OF DRAINAGE STRUCTURE SEDIMENTS

SUBSECTION 187.20 GENERAL

The work under this item shall include removing the accumulated dirt, refuse, and other debris from existing drainage structures, including the gutter mouth of curb inlets, and disposing of materials removed. Identification of drainage structures requiring sediment removal shall be at the direction of the resident engineer.

SUBSECTION 187.60 CONSTRUCTION METHODS

The cast hood shall be removed from all catch basins so equipped, prior to cleaning.

Hydraulic lift trucks shall be used during drainage structure cleaning operations so that the material can be decanted at the site. After material from several drainage structures along the same system is loaded onto the truck, the truck should be elevated so any free flowing liquid may drain back into the drainage structure. Material must arrive at the facility sufficiently dry to pass the Paint Filter Liquids Test (or no liquid drips from it when a handful is taken and squeezed).

All material removed from drainage structures shall be properly handled and disposed of by the Contractor, and this must be done in accordance with all Massachusetts Department of

Environmental Protection (DEP) Regulations, policies, and guidance. The responsibility for proper handling and disposal of this material shall be solely the Contractor's.

Material removed from the drainage structures shall be transported immediately to the place of disposal in machines or trucks that will not spill the material along the roadway. Any material falling onto the roadway shall be removed at the Contractor's own expense.

Catch basin cleanings are classified as solid waste by the DEP and may be disposed of at any landfill that is permitted by DEP to accept solid waste. Materials containing free-flowing liquids are prohibited from being accepted at landfills. The DEP encourages the beneficial reuse of this material whenever possible; however, use not in accordance with DEP determination, or disposal or use as fill in an unapproved location is not acceptable.

NOTE: It is anticipated that most, if not all, of the material will be landfilled, therefore the

Contractor should be aware that many landfills may require testing and analysis of the material prior to accepting it for disposal at the facility. The Contractor should take this into consideration in preparing the bid.

SUBSECTION 187.80 METHOD OF MEASUREMENT

Material removed and that is to be transported to an approved facility, will be measured for payment in the hydraulic lift truck, after decanting.

SUBSECTION 187.81 BASIS OF PAYMENT

Excavated material will be paid for at the contract unit price per cubic yard for removal and disposal of drainage structure sediments, which price shall include the cost of removal, delivery and disposal at an approved landfill, disposal facility or recycling facility, the cost for approvals, permits, testing, transportation, and other incidental expenses.

SUBSECTION 187.82 PAYMENT ITEMS

ITEM 187.3 Removal and Disposal of Drainage Structure Sediments Cubic Yard

SECTION 201 BASINS, MANHOLES AND INLETS SUBSECTION

201.40 GENERAL

Add the following at the end of this subsection:

Clay brick conforming to Section M4.05.2 of the Standard Specifications shall be used to adjust all manholes and catch basin frames and grates or covers to grade. For sewer manholes, Grade SS bricks shall be used for sewer inverts and shelves. Grade MS bricks shall be used for other locations.

Castings shall be as follows, or as directed by the Engineer:

1. Frames and Grates shall be Catalog #LF 245 as manufactured by E.L. LeBaron

Foundry Co., 14 East Union St., Brockton, MA 02403, or approved equal.

2. Drain and sewer manhole frames and covers shall be Catalog #LK 110 as manufactured E.L. LeBaron Foundry Co., 14 East Union St., Brockton, MA 02403, or approved equal, with “DRAIN” or “SEWER” cast into cover as appropriate.

3. All Castings shall be Cast Iron minimum class 25, conforming to ASTM A48 (ASTM

A48-76 for sewer), capable of withstanding AASHTO H-20 loading.

All exterior surfaces of manhole brickwork shall be plastered with cement mortar.

Leaching basins shall be precast concrete structures as approved by the Engineer.

SUBSECTION 201.60 GENERAL

Add the following at the end of this subsection:

Structures may be required to be built on (connected to) existing lines. Work may include, but is not limited to, excavation around existing pipe, removal/trimming existing pipe to inside face of structure, building new structure around existing pipes (including base and 4’ sump), and backfilling/compacting around structure.

The limits of the excavation shall be sawcut or milled full depth through all existing pavement prior to any excavation for structure placement. SUBSECTION 201.62 LAYING BRICKS AND

BLOCKS Add the following at the end of this subsection:

A minimum of 2 courses of brick shall be used to set frames on all manholes, catch basin and leaching basins.

SUBSECTION 201.63 PLACING CASTINGS

Add the following at the end of this subsection:

All three-flanged rectangular frames shall be placed as described above. The side of the casting without a flange shall be filled in with bricks and mortar or steel plates sufficient to cover any opening in the structure or as directed by the Engineer. Said work shall be considered incidental to Item 220, Drainage Structure Adjusted with no additional measurement or payment to be made.

Add the following new subsection:

SUBSECTION 201.66 LEACHING BASINS

Leaching basins shall be constructed with 4-foot sumps and shall be surrounded by 2 feet of crushed stone. Filter fabric shall line the entire excavation for the leaching basin up to the existing surface.

SUBSECTION 201.80 METHOD OF MEASUREMENT

Replace the first two paragraphs of this section with the following:

Measurement for catch basins, leaching basins, manholes and drop inlets shall be measured as complete units regardless of depth.

All cement blocks, filter fabric and stone associated with the construction of leaching basins shall be considered incidental to the cost of the leaching basin with no additional measurement or payment.

Sawcutting or milling of existing pavement to the excavation limits for structure placement shall be considered incidental to the cost of associated items, with no additional measurement or payment.

SUBSECTION 201.81 BASIS OF PAYMENT

Add the following at the end of this subsection:

All costs associated with construction of catch basins saddling existing drainage lines shall be included in the unit price per catch basin.

SECTION 230 CULVERTS, STORM DRAINS AND SEWER PIPES SUBSECTION

230.60 CONSTRUCTION METHODS - GENERAL

Add the following at the end of this subsection:

For all pipes, including services, the limits of the trench shall be sawcut or milled full depth through all existing layers of pavement prior to any excavation for pipe placement.

Add the following new subsection:

SUBSECTION 230.65 UTILITY WARNING AND IDENTIFICATION TAPE

Buried Utility Warning and Identification Tape shall be placed at locations as directed by the

Engineer. Said warning tape shall be made of plastic backed aluminum foil tape or detectable magnetic plastic tape with a minimum width of 3 inches. It shall be color coded and labeled continually along entire length of the tape in bold black letters for the appropriate utility and detectable by an electronic detection instrument. The markings on the tape should be permanent and unaffected by moisture or light.

Buried Utility Warning and Identification Tape shall be considered incidental to the work being done and no additional compensation will be offered for this item.

SUBSECTION 230.80 METHOD OF MEASUREMENT

Add the following at the end of this subsection:

The placement of pipe bedding shall be considered incidental to the placement of associated pipe, with no separate measurement or payment.

Sawcutting or milling of existing pavement to the excavation limits for pipe placement shall be considered incidental to the cost of associated items, with no additional measurement or payment.

SUBSECTION 230.81 BASIS OF PAYMENT Revise

6th sentence to read as follows:

Backfill to replace material removed under Class B Trench Excavation for sewer or drain pipe shall be ¾” crushed stone for drainage as specified in Section 150.

SECTION 301 WATER SYSTEMS

SUBSECTION 301.60, PART F. REMOVAL OF CASTINGS

Insert the word “disposed,” after the word “reset,” Add this new subsection:

SUBSECTION 301.61 GAS GATES

It shall be the sole responsibility of the Contractor to coordinate with Keyspan Energy Delivery to have any and all gas gates adjusted to the proper grades or as directed by the Engineer.

Unless otherwise directed by Keyspan Energy Delivery, it shall be the responsibility of

Keyspan to adjust said gates. In any case, however, no measurement or payment will be made for any gas gates adjusted by the Contractor.

SUBSECTION 301.80 METHOD OF MEASUREMENT

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Measurement of water gate boxes adjusted shall include all risers as necessary, up to a length of 12 inches.

SUBSECTION 301.81 BASIS OF PAYMENT

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All risers up to a length of 12 inches shall be considered incidental to the contract unit price for gate boxes adjusted, with no additional measurement or payment.

SECTION 402 DENSE GRADED CRUSHED STONE FOR SUB-BASE SUBSECTION

402.20 GENERAL

Add the following:

Dense Graded Crushed Stone for Shoulders shall consist of crusher-run coarse aggregates of crushed stone or gravel and fine aggregates of natural sand or stone screenings uniformly pre-mixed and placed on the shoulders at locations directed by the Engineer.

SUBSECTION 402.61 SPREADING AND COMPACTING

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The overall depth of the Gravel for Base Course layer shall be no less than 8 inches after compaction.

SUBSECTION 402.80 METHOD OF MEASUREMENT

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Dense Graded Crushed Stone for Shoulders shall be measured in place as directed by the

Engineer, with no percentage added.

SUBSECTION 402.81 BASIS OF PAYMENT

Dense Graded Crushed Stone for Shoulders will be paid for at the contract unit price per cubic yard complete in place.

SUBSECTION 402.82 PAYMENT ITEMS

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ITEM 402.12 Dense Graded Crushed Stone for Shoulders Cubic Yard

SECTION 403 RECLAIMED BASE COURSE AND/OR SUB-BASE

Replace the entire section with the following:

SUBSECTION 403.20 GENERAL

The work under this item shall conform to the relevant provisions of Section 403 of the

Standard Specifications and the following:

The work shall include the pulverizing of the existing pavement, the blending of the pulverized material with the existing underlying base material, the spraying of liquid calcium chloride on the blended materials, the adding and the blending of additional granular material as needed to provide for a homogeneous base course meeting prescribed gradations, the grading and the compacting the blended material to the lines and grades as shown on the plans and as directed by the Engineer, and the application of a final spray coat of liquid calcium chloride to the finished base course.

The work shall also include screening or other approved methods to remove oversized stones and the addition and mixing of additional granular material and bitumen into the blended material as necessary to bring the final reclaimed base course material into conformance with the specified gradation.

SUBSECTION 403.40 MATERIALS

All reclaimed material shall conform to the requirements of Subsection M1.11.0 of Division

111, Materials.

Aggregate for Crushed Stone for Blending, used to correct gradation deficiencies shall conform to the requirements of Subsections M2.0 1.0 to M2.01.6 of Division III, Materials.

Aggregate for Dense Graded Crushed Stone for Sub-base shall conform to the requirements of Subsection M2.01.7 of Division 111, Materials.

The blended base course shall be thoroughly mixed to a uniform gradation. If the blended material does not conform to the specified gradation, the Contractor shall furnish and mix additional granular material into the blended material to bring it into conformance, as directed by the Engineer.

Sampling and Testing

The Contractor shall be responsible for all sampling, testing, and analysis of materials associated with this item of work for the purposes of determining the material’s existing and finished properties and characteristics as they may pertain to the specifications stated for this item of work. The Contractor shall employ a certified soils testing lab, subject to the approval of the Engineer, to perform the sampling, testing, and analysis. The Engineer shall specify the location of all test pits – at a minimum spacing of 500 feet. The results of the analysis shall be submitted to the Engineer for review and approval prior to the commencement of the dependent, respective activity of work. Any gradation deficiencies in the sampled materials, as indicated by the test results, shall be corrected by blending the appropriate aggregate size(s) into the mixture.

SUBSECTION 403.60 CONSTRUCTION METHODS

Reclaiming operations shall not be permitted when the existing pavement or sub-base contains frost, when the sub-base is excessively wet as determined by the Engineer, nor when the air or surface temperature is below 40 F.

Reclaiming operations shall not commence before April 15 and shall terminate on or before

October 15 unless otherwise approved in writing by the Engineer.

Prior to the start of reclaiming operations, the Contractor shall locate and protect existing drainage and utility structures and underground pipes, culverts, conduits and other appurtenances.

The limit of each sequence of the reclamation process shall be 1.0 miles full width or as directed by the Engineer in order that the placing of pavement structure, up to the binder course, will be completed before beginning the next sequence of roadway reclamation work.

The Contractor shall be responsible for all testing and sampling of reclaimed materials associated with this work as specified hereafter. A certified soil-testing laboratory, approved by the Engineer shall do all testing of material samples.

Equipment

The recycling equipment shall have a positive depth control to insure a uniform depth of processing. This equipment shall have the ability to process the complete design depth specified into a homogeneous mass. It shall also be capable of crushing all oversize material encountered except ledge, or boulders larger than 8 inches in diameter.

A minimum of fourteen (14) calendar days prior to the proposed start of work, the Contractor shall submit in writing to the Engineer for approval, a description of the specific equipment and construction methods to be used in performing the work. The Contractor will be required to demonstrate, to the Engineer, the ability of the work crew and equipment to produce reclaimed material conforming to specifications at a rate of production consistent with the time allowed under the Contract. A test section shall be constructed approximately 500 feet long and one lane wide, and be located within the project limits at a location determined by the Engineer. The forward speed and processing direction (e.g., up cutting vs. down cutting) of the recycling equipment shall be recorded during construction of the test section.

Representative samples of the reclaimed material shall be taken from this test section by the

Contractor for analysis as directed by the Engineer. Full-scale production will not be allowed to commence until the Engineer has reviewed the test results and gives written approval of the equipment and construction methods used in the construction of the test strip.

Failure to meet gradation requirements or an insufficient production rate may be considered cause for rejection of the equipment, the construction methods, or both. The Contractor must then submit, in writing, the proposed changes in equipment and/or construction methods and either construct another test section or reconstruct the original section, as determined by the Engineer. This procedure may be repeated until acceptable results are obtained, at no additional compensation.

Otherwise, failure to meet gradation requirements due to improper equipment or construction methods shall not constitute a reason for any additional compensation for the import and blending of any aggregate to meet the deficiencies.

Approval of equipment includes the speed and processing direction it was operated at during construction of the test section. Therefore, the same operating speed and processing direction must be maintained during normal production. Changes in the equipment's operating speed and/or processing direction may only be made with the Engineer's written approval.

At least one vibratory roller shall be used on each reclaimed surface, and shall have a compacting width of not less than 5 feet. Each roller shall have a gross mass of not less than

16 tons.

Approved equipment shall be maintained in satisfactory working condition at all times.

Access to Area Abutters

Access to abutting properties shall be maintained at all times in accordance with the

Standard Specifications, and Special Provisions located in the forward sections of this document.

Coordination

The proposed drainage and other subsurface utility improvements shall be constructed prior to the pavement reclamation work. The Contractor shall excavate all trenches in such a way as to maintain the roadway pavement and base material separate from the underlying soils.

The roadway pavement and base materials shall be placed on the top of the trench during backfilling operations in preparation for the reclamation process.

If the Engineer determines that unsuitable material has been placed in the upper portion of the trench within the proposed reclamation depth, the Contractor shall remove this material and replace it with gravel borrow at no additional compensation.

Structure Lowering and Raising

All work shall be done in accordance with the applicable provisions of Section 220 and

Section 301.

All drainage, utility, and municipality structures are to be referenced and lowered to a minimum depth 6 inches below the bottom of the proposed reclaimed base course. Lowered structures shall be covered with steel plates conforming to the requirements specified in

Subsection 7.09. The voids remaining after the structures have been lowered are to be filled with a suitable material as determined by the Engineer. The Contractor will be responsible for the coordination with the respective utility companies for the lowering and raising of privately owned structures and gate boxes. The reclaiming operation shall not begin until all structures and boxes are lowered.

It shall be the Contractor's responsibility to maintain drainage functioning properly in the areas under construction up to the time when the final system is put into use. All structures lowered will be raised to the binder grade elevation upon placement of the binder course material for that section. Adjustment of the castings to final grade will not be allowed until the Engineer approves the placement of bituminous concrete top course material throughout the project.

Adjustment of Structures & Gates:

The work shall consist of rebuilding, removing, replacing, and adjusting the masonry and castings of present structures (manholes, catch basins, gate boxes, etc) as required, conforming to newly proposed line and grade changes, all in accordance with these specifications and in close conformity with the lines and grades shown on the plans or established by the Engineer. Payment shall be per structure, lowered, plated, & raised inclusive.

Adjustments Greater than 6” Vertical

The price bid shall include the cost to lower and raise all structure castings. The structure shall be lowered to a depth of eighteen (18) inches or as sufficient to eliminate interference from the reclaimer. The structures shall be dismantled in a non destructive manner and covered with a steel plate.

Adjustments Less than 6” Vertical

When the line or grade or both the line and grade of the structure changes by six inches or less, the structure shall be adjusted to line and grade. The masonry shall be removed to such depth as directed by the Engineer and new masonry shall be constructed to conform to the proposed design.

The work under this contract shall comply in all respects to Section 220, "Adjustment, Rebuilding, & Remodeling of Drainage Structures" and Section 301, “Water Systems” of the

Massachusetts Highway Department (MASSDOT) “Standard Specifications for Highways and

Bridges" 1995 Edition.

Reclaiming Operations

Prior to the start of reclamation, the existing pavement shall be swept with a power sweeper to remove all trash, sand, dirt, organic matter, and other undesirable material, to the satisfaction of the Engineer.

Also, the existing pavement shall be sawcut full depth within the areas where the adjacent surface is to be protected (curb, side streets, etc.) as shown on the plans and/or as directed by the Engineer.

The Contractor shall reclaim only that area of pavement that can be processed and compacted by the end of the same working day, at which time it must be opened to traffic, with the Engineer's approval. In any section, reclamation work shall be done on one-half the road width at a time. One-way traffic will be allowed only during working hours with traffic police present. Two-way traffic shall be maintained at all other times. Suitable ramping shall be in place at the beginning and end of work zone to allow for smooth and safe travel. This shall be considered incidental to the work for this item. The required density shall be maintained until the bituminous concrete pavement has been placed. Any imperfections discovered prior to its placement shall be repaired, as directed by the Engineer, at no additional compensation.

The total thickness of the pavement structure, unless otherwise indicated, and uppermost portion of the sub-base layer shall be recycled to the design depth specified on the typical section(s). The Contractor shall perform a sieve analysis of the reclaimed material for every

5,000 square yards of material processed or as often as conditions may require as determined by the Engineer. Test results shall be made available to the Engineer for review and approval. If conditions warrant, the Engineer may stop work until the required test results become available. If the Engineer directs, due to gradation deficiencies in the existing materials as indicated by the test pits, the appropriate crushed stone aggregate size(s) shall be blended with the recycled material to produce a uniform mixture meeting the gradation requirements. Additionally, if the Engineer directs, dense graded crushed stone shall be added for volume purposes.

Any required modifications to the remaining sub-base such as, but not limited to, cuts, fills, and grade realignment shall be made. Existing unsuitable material shall be removed to the lines and grades established by the Engineer and replaced with a suitable material, as determined by the Engineer. Existing surplus reclaimed material shall be used, when available, at no additional compensation.

All unsuitable material and/or excess reclaimed material shall become the property of the

Contractor to be properly disposed of outside the project limits.

Compaction and Dust Control

The reclaimed material shall be rolled, compacted and fine graded to the specified cross section(s) and/or grades as shown or as established by the Engineer.

The reclaimed base course shall be tested for compaction and smoothness and accuracy of grade in accordance with the applicable provisions of Subsection 401.60. The required density shall be measured by a Nuclear Density Gauge. If any portions are found to be unacceptable by the Engineer, such portions shall be reprocessed, re-graded, and recompacted until the required smoothness and accuracy are obtained.

At the end of each day's progress, the Contractor shall apply Calcium Chloride in accordance with the applicable provisions of Section 440. Water for roadway dust control shall be applied as directed by the Engineer.

A grader, roller and water wagon shall be maintained on the project site during the reclamation process. The Contractor shall submit to the Engineer, in writing, a twenty-four

(24) hour availability telephone number for any emergency maintenance dictated by the weather conditions or as determined by the Engineer, for repair, compaction, and dust control.

SUBSECTION 403.80 METHOD OF MEASUREMENT

Reclaimed base course shall be measured for payment by the square yard of pre-reclamation pavement area hence reclaimed, complete in-place within the lines shown on the plans, or as directed by Engineer. No deductions will be made for surface structures. The lowering and the plating of gates and structures will be considered incidental to this item and no additional compensation will be allowed.

Structures raised from the plated depth to the bituminous concrete binder course elevation or to the bituminous concrete top course elevation (in one operation) shall be measured as a remodeled unit each, complete and approved.

Structures adjusted from the bituminous concrete binder course elevation to the bituminous concrete top course elevation shall be measured as an adjusted unit each, complete and approved.

Structures rebuilt shall be measured by the average height in vertical feet and hundredths of a foot from the bottom of the deterioration to the plated depth. Structures damaged below the plated depth, due to the Contractors negligence, shall be measured and deducted from the vertical foot measurement. Raising the structure from the plated depth will be measured as stated above for a remodeled unit.

SUBSECTION 403.81 BASIS OF PAYMENT

The accepted quantity of reclamation as measured above shall be paid for at the contract unit price bid per square yard. This unit price shall include all compensation for crushing, pulverizing, blending, spreading, grading, sawcutting the existing asphalt pavement at the direction of the Engineer, compacting, test section construction, blending with aggregate, moving the processed material to allow for modifications to the remaining sub-base and/or subgrade, moving reclaimed material from one location to another within the project and any incurred costs resulting from the Contractor's decision to process off site.

The unit price bid shall also include compensation for all costs associated with the removal of the castings and the referencing, lowering, and plating of the structures. It shall also include full compensation for all labor, tools, equipment, materials, and all incidental work necessary to complete the work as specified.

Removal and disposal of unsuitable material, surplus reclaimed material, or any subbase/subgrade material necessary for grade changes shall be paid for at the contract unit price per cubic yard for Item 120.1, Unclassified Excavation.

Special borrow required to be placed under the reclaimed material shall be paid for at the contract unit price per cubic yard for Item 150.1, Special Borrow.

Grading and compacting the sub-base and/or subgrade resulting from the removal of unsuitable material shall be paid for at the contract unit price per square yard (m2) for Item

170, Fine Grading and Compacting.

Adjustment of drainage structures shall be paid for at the contract unit price each for Item

220, Drainage Structure Adjusted.

Rebuilding of drainage structures shall be paid for vertically at the contract unit price per foot

(m) for Item 220.2, Drainage Structure Rebuilt.

Raising of lowered structures shall be paid for at the contract unit price each for Item 220.5

Drainage Structure Remodeled.

Aggregate for providing added volume shall be paid for at the contract unit price per ton (Mg) for Item 402.1, Dense Graded Crushed Stone for Sub-base.

Aggregate to correct gradation deficiencies shall be paid for at the contract unit price per ton

(Mg) for Item 403.1, Crushed Stone for Blending.

Calcium Chloride for dust control shall be paid for at the contract unit price per pound (kg) for

Item 440, Calcium Chloride for Roadway Dust Control.

Water for dust control shall be paid for at the contract unit price per 1,000 gallons (m3) for

Item 443, Water for Roadway Dust Control.

SUBSECTION 403.82 PAYMENT ITEMS

ITEM 120.1 Unclassified Excavation Cubic Yard

ITEM 150.1 Special Borrow Cubic Yard

ITEM 170. Fine Grading and Compacting Square Yard

ITEM 220. Drainage Structure Adjusted Each

ITEM 220.2 Drainage Structure Rebuilt Feet

ITEM 220.5 Drainage Structure Remodeled Each

ITEM 402.1 Dense Graded Crushed Stone for Sub-base Ton

ITEM 403 Reclaimed Pavement for Base Course and/or Sub-base Square Yard

ITEM 403.1 Crushed Stone for Blending Ton

ITEM 440 Calcium Chloride for Roadway Dust Control Pound

ITEM 443 Water for Roadway Dust Control M. Gallons

Insert the following new section in numerical order:

SECTION 442 LIQUID CALCIUM CHORIDE FOR BLENDING

SUBSECTION 442.20 GENERAL

Liquid Calcium Chloride shall be used for blending into reclaimed base material as directed by the Engineer.

SUBSECTION 442.40 MATERIALS

The calcium chloride solution shall be provided by the manufacturer as a true solution and shall not be reconstituted from flake calcium chloride. The calcium chloride shall meet the following material specifications (see ASTM Designation D98; AASHTO-M144).

Calcium Chloride 35% 1%

Alkali Chloride as NaCl 2% max.

Magnesium as MgCl

Typical (in lbs. per gallon)

0.1%

Calcium Chloride 5.05

Sodium Chloride 0.2

Magnesium Chloride 0.004

Calcium Sulfate 0.004

Water 6.002

11.26

SUBSECTION 442.60 CONSTRUCTION METHODS

The distributor for calcium shall be capable of applying liquid calcium chloride in accurately measured quantities at any rate between 0.1 to 2.0 gallons per square yard of roadway surface, at any length of spray bars up to 20 feet. The distributor shall be capable of marinating a uniform rate of distribution of material regardless of change in grade, width or direction of the road. The distributor shall be equipped with a Digital Volumetric Accumulator capable of measuring gallons applied and distance traveled. The volume and measuring device shall be equipped with a power unit for the pump so that application is by pressure, not gravity. The spray nozzles and pressure system shall provide a sufficient and uniform fanshaped spray of material throughout the entire length of the spray bar at all times while operating and shall be adjustable laterally and horizontally. The spray shall completely cover the roadway surface receiving the treatment.

After the first pulverization of the existing road pavement, one application of calcium chloride totaling 0.75 gallon per square yard shall be applied to the reclaimed material. The aggregate mass shall then be pulverized again to ensure proper asphalt, gravel and calcium chloride blending to the desired depth. Following base compaction, shaping, regrading and final compaction a final capping of 0.25 gallons per square yard of calcium chloride shall be applied.

SUBSECTION 442.80 METHOD OF MEASUREMENT

Liquid Calcium Chloride for Blending shall be measured by the gallon used.

SUBSECTION 442.81 BASIS OF PAYMENT

Payment for Liquid Calcium Chloride for Blending shall be paid for at the contract unit price per gallon used. Payment will be for the actual quantity applied that is not to exceed the quantity as calculated based on the aforementioned application rates and surface applications area as shown on the plans or as determined by the Engineer.

SUBSECTION 442.82 PAYMENT ITEMS

ITEM 442. Liquid Calcium Chloride for Blending Gallon

SECTION 460 HOT MIX ASPHALT PAVING SUBSECTION

460.62 TACK COAT

Add the following at the end of this subsection:

Tack coat and sand shall be applied to all joints composed of hot mix asphalt immediately after paving or as directed by the Engineer. SUBSECTION 460.63 SPREADING AND

FINISHING Add the following at the end…