24-52-DPS IFB Manual.docx

City of Salem, Massachusetts

INVITATION FOR BID

IFB #24-52-DPS

MISCELLANEOUS ROADWAY CONSTRUCTION & PAVING PROJECTS

February 28, 2024

BIDS DUE:

March 14th, 2024 @ 11:00AM Late Bids Will Be Rejected

DELIVER COMPLETED SUBMISSIONS TO:

Anthony Delaney 93 Washington Street, 2nd Floor Salem, MA 01970 Phone: 978-619-5695 e-mail: adelaney@salem.com

IFB # 24-52-DPS

City of Salem, Massachusetts Purchasing Department

COVER SHEET

The City of Salem reserves the right to reject any or all Bids, to omit any item or items called for, or to accept the bids(s) deemed in the best interest of the City. One Original and One (1) copy of the bids must be submitted on or before 1:00 PM on March 8, 2024, to:

Anthony Delaney 93 Washington Street, 2nd Floor.

Salem, MA 01970 Phone: 978-619-5695 e-mail: adelaney@salem.com

The envelope containing the Bid and required information must be sealed and marked with the Proposer’s name, title of proposal, IFB number, and date of opening. The Proposer must sign all required signature pages in order for the proposal to be considered.

The Proposer acknowledges receipt of the following ADDENDA #

BUSINESS/INDIVIDUAL NAME_______________________________________________________

ADDRESS __________________________________________________________

CITY, STATE, ZIP CODE __________________________________________________________

TELEPHONE __________________________________________________________

EMAIL __________________________________________________________

INDIVIDUAL/AUTHORIZED SIGNATURE ______________________________________

AUTHORIZED OFFICER NAME (print) ______________________________________

DATE ______________________________________

By signing the above, the authorized officer is certifying that a complete examination of all bid/RFP documents has been made and that the goods/services will be delivered within the time specified and at the prices stated.

All bidders must sign and submit with their bid the attached Certificate of Good Faith and Tax Attestation Form. Failure to do so will result in the bid being unresponsive and rejected.

If bidder/proposer is a co-partnership, all partners must execute both copies of the bid/proposal, unless one partner has been authorized to sign for the co-partnership, in which case evidence of such authority shall be submitted.

If the bidder/proposer is a corporation, the authorized agent shall execute both copies of the bid/proposal. Evidence of authority to sign must be submitted.

The City of Salem reserves the right to reject any or all bids/proposals and waive any informalities deemed to be in the best interests of the City.

INSTRUCTIONS TO BIDDERS

BID NO. 24-52-DPS

1.01 - PROPOSAL

1. Sealed bids will be received at the time and place as designated by the Owner in the “Invitation for Bid.”

2. If, at the time of the scheduled bid opening, the City Offices are closed due to inclement weather or other unforeseeable events, the bid opening will be postponed until the same time as specified in the bid documents on the next normal business day. Bids will be accepted until that date and time.

3. Proposal envelopes shall be clearly marked “Sealed Bid” and addressed to: City of Salem, Purchasing Department, 93 Washington Street, Salem, MA 01810.

4. Proposals shall be submitted in duplicate. Proposal envelopes shall have the bidder’s company name and address on the outside.

5. No claims for immunity or exceptions predicated upon misunderstanding or failure to correctly interpret the “Invitation for Bid” or the contract Documents will be allowed.

1.02 - BID SETS

1. Bid sets will be available at the Office of the Purchasing Agent, Salem City Hall, 93 Washington Street, Salem, Massachusetts as well as at https://www.salem.com/purchasing. There is no cost for copies of the bid sets.

1.03 – PRE-BID CONFERENCES AND SITE VISITS

1. No pre-bid meeting or site visit is scheduled for this contract opportunity.

1.04 - QUALIFICATION AND LICENSING

1. All Bidders are notified that they must be prequalified by MassDOT and licensed under prevailing state and local laws and regulations governing the proposed work.

2. All work and materials shall comply in every respect with the building laws, state and City regulations, and the directions of the inspector of buildings and such building laws, regulations and directions are to be considered as a part of the Contract to which it relates.

1.05 - BID WITHDRAWAL

3. Withdrawal or modifications to bids will be allowed only if written notice of a Bidder’s desire to withdraw or modify his/her bid is filed prior to the time of bid opening and at the place specified in the request for bids. A notice of a Bidder’s desire to withdraw or modify a bid must be signed by the Bidder or his/her designated representative.

4. No bid may be withdrawn for a period of thirty (30) days after the scheduled closing time for the receipt of bids. The Owner reserves the right to accept or reject in whole or in part any or all bids or take whatever other action that may be deemed to be in its best interest.

1.06 - LOCATION OF SITE

1. Various roadways and public walkways throughout the City of Salem, MA.

1.07 – BID/CONTRACT DOCUMENTS

1. The Contract Documents consist of the following:

1. Specifications/Scope of Services.

2. Drawings as indicated in the Specifications, if applicable.

3. Addenda to Specifications and drawings, if any.

4. The sample construction contract agreement and contract supplement “C.”

5. The City issued a Purchase Order.

1.8 - OWNER

1. Where the term Owner is used in these Specifications, and other Contract Documents, same refers to City of Salem, Massachusetts, or its authorized representative.

1.09 – ENGINEER/ARCHITECT

1. Where the term Engineer/Architect appears in these Specifications, same refers to City of Salem, or its Designee.

1.9 - CONTRACTOR

2. Where the term Contractor or General Contractor is used in the Specifications, it shall mean the Contractor mentioned as such in the Agreement.

3. Where reference is made to Subcontractors, such reference is intended for reasons of clarification and the relationship between the Contractor and said Subcontractors shall be in accordance with the General Conditions.

1.11 - EXPLANATION TO BIDDERS

1. No oral interpretation will be made. Any interpretations made to bidders will be in the form of an addendum to the Specifications and Drawings that will be forwarded to all bidders.

2. Discrepancies, omissions or doubts as to the meaning of Specifications and drawings should be communicated at once to the Purchasing Agent for interpretation. This request for clarification must be made in writing, via email (adelaney@salem.com), prior to the bid opening. Bidders should act promptly and allow sufficient time for a reply to reach them before the submission of their bids and any interpretation made by the Purchasing Agent and/or the Engineer/Architect prior to receipt of bids shall be made a part of the Contract.

3. Requests for clarifications by a prospective Bidder regarding the specifications, or other bid documents must be presented in writing, via email (twatkins@salm.com), to the Purchasing Agent before the bids are opened. Requests shall include the project specification name and date and shall be directed to the Purchasing Agent.

4. Verbal explanations or instructions will not be binding during the bidding process. Only written addenda are binding. Written addenda resulting from requests for clarifications will be delivered to all listed holders of the Bid Documents no later than (3) business days prior to the bid opening. Addenda may be issued after this date if deemed to be in the best interests of the City by the Purchasing Agent. All Bidders shall acknowledge the receipt of all addenda when submitting their bids.

5. In the absence of an interpretation by the Purchasing Agent and/or Engineer/Architect should the Specifications disagree in themselves or with the drawings, the better quality or the greater quantity of work or materials shall be estimated upon and, unless otherwise ordered, shall be furnished.

1.012 - CONDITIONS OF WORK

1. Each bidder shall carefully examine the Contract Documents, shall visit the site, and fully inform himself as to all existing and controlling conditions and limitations. The submission of a bid shall be conclusive evidence that the Bidder is familiar with all such conditions, including the nature, amount, and location of the work, the type of facilities needed preliminary to and during the execution of the work, the general and local conditions, labor conditions, and all other matters which might in any way affect or have a bearing on the work or its cost.

2. The Contractor shall include all charges for labor, material, tools, staging, equipment, and supervision that he/she deems necessary in order to complete, in a thoroughly professional and expeditious manner, all the work described hereafter. All work shall be according to code and approved by the proper authority. Material having salvage value shall become the property of the City of Salem. All other material and debris accumulated because of this operation shall become the property of the contractor and shall be removed, in a legal manner in accordance with all applicable requirements and permits, from the premises by him/her. The premises are to be clean and neat, to the satisfaction of the City of Salem and/or designated Consultant.

1.13 - PERMITS, FEES, AND NOTICES

1. The successful bidder shall secure all permits and licenses necessary for the proper execution and completion of the work, when applicable.

2. The Owner will waive or pay for, as applicable, fees for all necessary permits.

1.14 - COOPERATION AND COORDINATION

1. The Owner has entered, or may enter, into separate contracts for work related to the work under this specification.

2. The successful bidder shall cooperate with said contractors and coordinate his work with the work of other trades so that construction will proceed in a rapid and orderly fashion.

1.15 - TIMELY COMPLETION

1. The Contractor shall start the work under this Contract on written notice from and on the date set by the Owner. The Contractor shall start the work on the date set by the Owner and shall continue, without interruption, to completion with all the practical dispatch and regularity. The project is expected to begin on or around May 1, 2024, and shall be completed in full no later than May 30, 2025. The Owner, in its sole discretion, may renew the contract, on an annual basis, for two additional years.

1.16 - CONTRACT FORM

1. The successful Bidder will be notified of the award of the Contract in writing and shall properly execute a contract in accordance with the construction contract agreement and contract supplement “C” provided herein, within five (5) working days after receipt of such notification.

1.17 - ADDENDA

1. The Owner may, during the bidding period, advise the Bidders by adding additions, omissions, or alterations in the Specifications and drawings. All such changes shall become a part of the contract and shall be included in the work covered by the Proposal.

2. No addenda will be issued later than three (3) days prior to the date set for receipt of bids, unless deemed to be in the public’s best interest to do so by the Purchasing Agent.

1.18 - TAXES

1. The Owner is exempt from all purchaser taxes. Tax Exempt Number will be supplied to the successful bidder.

1.19 - PROPOSAL SECURITY

1. Each Bidder shall submit with his bid a Bid Security in the amount of five percent (5%) of the total bid price. The Bid Security shall consist of Cash, Certified Check, or Bidder’s Bond.

1.20 - LABOR & MATERIALS PAYMENT BOND

1. Before Contract signing, the Contractor shall furnish the Owner with a Labor & Materials Payment Bond and Performance Bond each in the amount of one hundred percent (100%) of the Contract price, to insure completion of work and payment for all labor and materials furnished on the project.

2. All bonds shall be written in conformance with Massachusetts General Laws, Chapter 149, Section 29, as amended.

3. All bonds shall be submitted to the City on the City issued forms which have been incorporated with this Bid.

1.21 – CONTRACTOR’S LIABILITY INSURANCE

2. See the insurance requirements and minimum coverage amounts listed in both the specifications and Contract Supplement “C.”

1.22 – COMPETENCY OF BIDDERS AND REFERENCES

1. No contract will be awarded to any person, firm, or corporation that is in arrears or is in default to the Owner upon any debt or contract, or that is a defaulter, as surety or otherwise, upon any obligation to the Owner, or has failed to perform faithfully any previous contract with the Owner.

3. All Bidders must supply a list of references for similar projects performed over the last three years providing names, addresses and contract person with telephone number on each project. This reference list is to be submitted with the bid.

1.23 - AWARD OF CONTRACT

1. This contract shall be awarded to the lowest responsible and eligible bidder based upon the grand total as indicated on the bid price sheet and as in accordance with MGL Ch. 30, 39M. Such a bidder must possess the skill, ability, and integrity necessary for the faithful performance of the work and shall establish his ability to comply with the schedule of work outlined in the Contract section. The term “lowest responsible and eligible bidder” as used herein shall mean the bidder whose bid is the lowest of those bidders possessing the skill, ability and integrity necessary for the faithful performance of the work within the time limit allowed, and past experience, if any, with the City of Salem may have with the bidder on similar projects.

2. The City of Salem reserves the right to award each section of the bid to one vendor or to multiple vendors. Bidders are allowed to bid on only one, or as many as all four items that the City is seeking pricing on. The City will award a contract to the lowest responsible and eligible bidder in each category, thereby having the potential to award each item to a different Contractor. In the case of awarding to multiple vendors the low bidder in each category will be contacted first when placing orders. If the primary vendor cannot meet the quantity needed or the time required, then the secondary vendor will be contacted. The items being bid are for projects that develop during the year and the demand for these items are heavier during specific times of the year, therefore, it is felt that meeting specific quantities required and time constraints is an issue.

1.24 – PAYMENT OF MA PREVAILING WAGE

1. Attached copies of Prevailing Wage Rates and the Statement of Compliance from Mass. Dept. of Labor and Industries shall apply to the labor required to perform all work. Those rates must be reviewed and complied with. Certified Weekly Payroll documents shall be sent directly to the Office of the Purchasing Agent, 93 Washington Street, Salem, MA 01970. They shall be sent no later than three (3) business days after the close of the previous workweek.

CITY OF SALEM

MISCELLANEOUS ROADWAY CONSTRUCTION AND PAVING PROJECTS

Any reference as to a specific type or manufacturer in these specifications is for identification purposes only. Equivalent products will be considered. In the event samples or specifications on equivalent products are required it will be at the vendor’s expense. The City of Salem will have the sole discretion on whether or not a product is considered an equivalent.

The bidding and award of these contracts will be under the provisions of Massachusetts General Law Chapter 30 Section 39M and the provisions of M.G.L. Chapter 30 Section 39S.

Prevailing wage rates are required on these construction projects and are included herein.

Bidders will be required to comply with the provisions of M.G.L. Chapter 30, Section 39S. Bidders must sign and return with their bid submission the attached certification for compliance with the provisions of M.G.L. Chapter 30, Section 39S. See Attachment C.

Award of Contract This contract shall be awarded to the lowest responsible and eligible bidder. Such a bidder must possess the skill, ability, and integrity necessary for the faithful performance of the work. The term “lowest responsible and eligible bidder” as used herein shall mean the bidder whose bid is the lowest of those bidders possessing the skill, ability, and integrity necessary for the faithful performance of the work within the time limit allowed. This bid will be awarded to the lowest responsible and eligible bidder for each of the three Categories: Item 1 Roadway Paving and Cold Milling, Item 2 Pavement Reclamation, and Item 3 – Highway-Sidewalk and Curbing.

The only price adjustment clauses that will be accepted are those as indicated in Attachment A and Attachment B. Vendors who include any additional price adjustment and/or escalation clause with their bid will be rejected.

The successful vendor(s) shall designate a Construction Manager for the duration of the project. The Construction Manager is required to be on site at all times 100% to inspect the work, for the duration of the project and shall be responsible to work with the City Engineer or his designee to ensure that the quality of work required by the City of Salem is met.

A pre-construction meeting with all parties involved will be held prior to any construction.

PRE-QUALIFICATION PROCEDURE FOR CHAPTER 90 WORK

Subject to the requirements of Chapter 29, Section 8B of the General Laws, each prospective Bidder proposing to bid on any work, excepting the construction, reconstruction, repair or alteration of buildings, to be awarded by a municipality under the provisions of Section 34 of Chapter 90, must be pre-qualified in accordance with 720 CMR 5.00, “Pre-qualification of Contractors”, (available upon request from Massachusetts Highway Department).

Any Contractor wishing to submit a bid on Items 1 - 4, must be prequalified with MassDOT in the appropriate classes of work. Only prospective bidders listed on the MassDOT prequalification list or waiver list will be eligible to take out “Official” bid documents from Purchasing. Contractors seeking “Informational Only” bid documents are not required to follow the aforementioned procedure.

Items 1 – 4 are to follow the general definitions of the various classes of work and each classification may include other related work as stipulated in the proposal and must be performed in accordance with all applicable state and federal regulations. These definitions may be found in the document named “Definition of Classes of Work” updated 11/1/2010 on the MassDOT website, Only a bidder who is pre-qualified shall be eligible for the award of a contract. This applies to Items 1 – 3. All bids submitted by non-prequalified bidders on these sections will be invalid. Comment by David Kucharsky: Do we need to include Item 4 in this instance?

ITEM 1. PAVEMENT SURFACING

ITEM 2. PAVEMENT – RECLAMATION

ITEM 3. HIGHWAY - SIDEWALK AND CURBING

ITEM 4. SPEED HUMPS – INSTALLATION

The work on the above items shall conform to these specifications and shall be in accordance with the applicable section of the current specifications of the Commonwealth of Massachusetts, Department of Transportation, “Standard Specifications for Highways and Bridges" as revised from time to time.

All materials supplied must be in accordance with the current Specifications of the Commonwealth of Massachusetts Department of Transportation "Standard Specifications for Highways and Bridges", Section M1-M3, and the successful bidder may be required to certify in the contract that the materials will meet such specifications. Bids for Hot Mix Asphalt will include delivery, spreading, or applying to the roads and streets of the City of Salem, as directed.

GENERAL

· All plants, machinery, equipment quarries and materials used in the manufacture, production, delivery, or application of materials purchased under these documents shall be available and subject to the inspection of the City Engineer or DPS Director and/or their authorized representatives at any and all times.

· The Contractor is required to provide a written two-week “look ahead” schedule of work on the Friday before the week the work commences, in the format acceptable by the City Engineer or DPS Director.

· A project meeting will occur weekly with the Contractor and the City’s designee.

· The Contractor is required to provide a digital video tape or digital photographic record of all existing site conditions before work commences.

· The Contractor is responsible for coordinating all associated work with all third-party utility companies.

· The Contractor will request the required police details in advance of the commencement of work, based on the written schedule of work provided by the contractor and accepted by the City Engineer or the DPS Director. The City will be responsible for the cost of these details. The Contractor will be responsible for the proper cancellation of any and all police details in the event of a work cancellation. In the absence of the proper cancellation, the cost of any and all police details shall be the responsibility of the Contractor.

ESTIMATED QUANTITIES

All work or materials required by these specifications will be provided on an as needed basis. The nature and magnitude of the work generated under this contract may vary significantly. An increase or decrease in the quantity of any item shall not be regarded as a cause for an increase or decrease in the price. The City of Salem reserves the right to increase or decrease the quantities of all items.

The approximate quantities provided will be used primarily to establish the lowest responsible and eligible bidder for each item or group of items to be awarded and should only be used as a guideline and not as a guarantee of future activity.

It must also be noted that unit price pays item(s) for complete services, as set forth in the proposal, are based on ranges of units of work performed for various work items, and any specific and/or expected total of quantities for each work item are estimated herein. Consequently, the bid unit price(s), as bid, must include furnishing and installation of all labor, materials, equipment, and tools, including mobilization, demobilization, storage and protection of materials, site clean-up and safety, traffic controls (not including police details) disposal of waste and surplus materials, restoration of damaged/disturbed areas, all necessary reporting required by the City and Chapter 90, and all else incidental to the satisfactory completion of each item, as provided.

PROPOSAL ITEMS 1a – 1m

1a. Unclassified Excavation Labor and equipment to excavate materials of every description, including, but not limited to cobbles, concrete, trolley tracks and unsuitable materials, in accordance with the relevant portions of Section 120 of the current MassDOT Standard Specifications for Highways & Bridges, regardless of the type encountered, from within the project limits and as directed by the Engineer, except those materials for which excavation is included with the work specified to be performed under other items of this Contract.

No separate [payment shall be made for the offsite disposal of all existing material unsuitable for reuse in the proposed work, but all costs in connection therewith shall be included in the unit price for Unclassified Excavation.

1b. Gravel Borrow Labor and equipment to deliver and install gravel borrow, in accordance with Section 120, 150, and 170 of the current MassDOT Standard Specifications for Highways & Bridges. This item shall include provisions for placing and compacting processed gravel (material M1.03.0 Type b) to be used as a subbase as directed by the Engineer. Gravel borrow will be paid for after placement and compaction, in place, plus 15%. Unit price shall include all necessary testing to establish the suitability of the material.

1c. Hot Mix Asphalt, Binder course Labor and equipment to deliver and apply Hot Mix Asphalt in accordance with Section 460 of the current Commonwealth of Massachusetts Department of Transportation Standard Specifications for Highways & Bridges. Materials shall conform to the requirements of section M3.11 1d. Hot Mix Asphalt, Top course Labor and equipment to deliver and apply Hot Mix Asphalt in accordance with Section 460 of the current Commonwealth of Massachusetts Department of Transportation Standard Specifications for Highways & Bridges. Materials shall conform to the requirements of section M3.11 NOTE: While performing work under 1c and 1d above, the Contractor is responsible for ensuring proper drainage off all paved areas and any unsatisfactory grading shall be corrected by the Contractor, at the Contractors expense 1e. Structure Casting Removed & Plated Labor & equipment for removing and plating all utility holes and catch basin covers to a minimum depth of fourteen”-16” prior to milling or reclaiming of City Streets.

NOTE: Castings are to be removed and plated according to City specifications depending on the job.

1f. Water Gate Box Removed Labor and materials for removing water gate boxes to a minimum depth of fourteen”-16” prior to milling or reclaiming City Streets.

NOTE: Water boxes are to be removed according to City specifications depending on the particular job. Care shall be taken to remove the top section of the gate box without breaking it off. Then the cover shall be placed upside down over the bottom section to keep the backfill material from entering. Any gate boxes that are broken off by the contractor shall be repaired by the contractor and shall not be included for payment, unless directed to break off gate boxes by the Engineer. Any gate boxes found filled with backfill material shall be cleaned by the contractor and shall not be included for payment, unless directed by the Engineer.

1g. Structure Casting Adjusted Labor and equipment for adjusting utility holes and catch basin grates / covers prior to resurfacing of City streets.

NOTE: Castings to be raised according to City specifications depending on the job.

1h. Water Gate Box Adjusted Labor and equipment for adjusting water gate boxes prior to resurfacing of City streets.

NOTE: Water boxes are to be raised according to City Specifications depending on the job.

1i. Structure Casting Reset Labor and equipment for resetting buried utility hole and catch basin grates / covers after milling or reclaiming work and binder is placed and prior surface coarse. All debris placed in the structure by the Contractor must be removed at the Contractor’s expense.

NOTE: Castings to be reset according to City specifications depending on the job.

1j. Water Gate Box Reset Labor and equipment for resetting water gate boxes after milling or reclaiming work and binder is placed and prior to surface coarse. All debris placed in the water gate box by the Contractor must be removed at the Contractor’s expense.

NOTE: Water boxes are to be reset according to City specifications depending on the job.

1k. Structure Rebuilt Labor and equipment for rebuilding damaged/deteriorated structures below the plated depth. Structures rebuilt shall be measured by the average height in feet and inches from the bottom of the deterioration to the plated depth.

1l. Hot Mix Asphalt Pavement Milling Labor, equipment, and materials for Grinding of asphalt surface, maximum depth two inches according to Section 120 of current Mass DOT Standard Specifications for Highways & Bridges. The City has the first right of refusal for asphalt millings. If the City decides not to retain the millings, all asphalt millings to be loaded on trucks and hauled from site, the cost of which is to be included in the unit price.

1m. Hot Mix Asphalt Pavement Milling – Additional Depth Labor, equipment, and materials for Grinding of asphalt surface, price per additional inch of depth over two inches, as specified in item 1j.

PROPOSAL ITEM 1(1a – 1M)

PAVEMENT-SURFACING

BID NO. 24-52-DPS

Award to be based on this sum for these items 1a –1m.

Estimated quantities shown are approximate only NO GUARANTEED MINIMUM

TOTAL AMOUNT items 1a through 1m

PROPOSAL ITEM 2

PAVEMENT – RECLAMATION

BID NO. 24-52-DPS

RECLAIMED PAVEMENT FOR BASE COURSE AND/OR SUB-BASE

Grinding and mixing asphalt surface and gravel base to a depth of eight” – 10” resulting in a uniform mixture of ground-up asphalt and existing gravel base according to Section 403 of current Commonwealth of Massachusetts Department of Transportation Standard Specifications for Highways & Bridges. Any stone or asphalt piece over four” to removed – Price includes spreading, fine grading and compacting, ready for new asphalt surface – dust to be controlled by applying water or CaC1 as needed. Reclaiming must be performed CMI – RS500 or equal. Working with the City Engineer, or his designee, the Contractor is responsible for grade offset stakes of all finish grades and for insuring proper drainage of all reclaimed areas. Any unsatisfactory grading shall be corrected at the Contractor’s expense.

TOTAL AMOUNT item 2

Award to be based on the total amount of item 2.

Estimated quantities shown are approximate only.

NO GUARANTEED MINIMUM

PROPOSAL ITEM 3 (3a - 3h)

HIGHWAY - SIDEWALK AND CURBING

BID NO. 24-52-DPS

Work under this section is anticipated to be necessary at numerous locations and the Contractor should expect relocating equipment and materials from location to location.

I. GRANITE CURB

GENERAL

Work under these items shall include furnishing and setting granite curb to conform to the relevant provisions of Section 500 of the Massachusetts Department of Transportation Standard Specifications and Construction Details.

DESCRIPTION

The curb shall be set to the proposed line and grade of the road with the top of the curb being six inches above the final proposed edge grade of the road surface. The trench for the curb shall be excavated to a width of eighteen inches. The subgrade of the trench shall be a depth below the proposed finished grade of the curb equal to at least six inches plus the depth of the curbstone.

The foundation for the curb shall consist of gravel (M1.03.0 Type c, maximum size of stone 2") spread upon the subgrade and after being thoroughly compacted by tamping shall be at least six inches in depth. After the curb is set the space behind it and the wall of the trench on the sidewalk side shall be filled with gravel thoroughly tamped to the grade of the bottom of the sidewalk, care being taken not to affect the line or grade of the curb. The space on the roadway side of the curb shall be filled with concrete from the elevation of the bottom of the curb to the elevation of the bottom of the street paving material. Any class of cement concrete that is acceptable under section M4 of the State Standards may be used. The top shall be filled with bituminous concrete Type I compacted to match the existing pavement.

3a. VERTICAL GRANITE CURB All granite curbs shall be light gray in color, free from seams and other structural imperfections or flaws which would impair its structural integrity, and of a smooth split appearance. Natural color variations characteristic of the deposit from which the curbing is obtained will be permitted.

Granite curb shall be cut to the dimensions set in M9.04.1.

VA4, Min. length six feet Width at top six inches.

Depth 17-19 inches

3b. GRANITE TRANSITION CURB Vertical granite transition curbs shall be installed on either side of wheelchair ramps at street intersections, at all driveway openings and other locations where directed by the engineer. In cases where they form a wheelchair ramp no curb will be placed in the depressed section. The finish grade of the sidewalk, either new or overlaid, shall slope down to a grade of 7.5% with a construction tolerance of +/-0.5 % (8.0% maximum) to meet the existing grade of the street. The lengths and method of setting shall be as required according to the MassDOT standard details attached at the back of the specifications.

3c. GRANITE CURB CORNERS Granite curb corners shall be set at driveway openings and other locations were directed by the engineer. The trench for the curb corner shall be excavated so that there shall be constructed a foundation of gravel which when thoroughly compacted will be six inches in depth and extending six inches beyond the front and back of the curb corner to the full depth of foundation.

3d. VERTICAL GRANITE CURB INLETS Vertical granite curb inlets shall be standardized, five inches in width at the top and six feet long. The method of setting shall be as described above.

3e. REMOVE AND RESET EXISTING GRANITE CURB Remove and reset existing granite curb shall conform to the current MassDOT Standard Specifications and Construction Details.

3f. HOT MIX ASPHALT CURB The HMA mixture and curb placement shall conform to current MassDOT Specifications and Construction Standard Details.

MEASUREMENT

The length of curb shall be as measured along the front arris of the curb as set in place.

The quantity of hot mix asphalt curbs to be paid for will be the length measured along curb at its lowest exposed edge.

Each curb inlet and curb corner set, complete in place, will be considered one unit.

PAYMENT

Curb will be paid for at the contract unit price per linear foot under the item for the curb, complete in place including cutting, excavation, removal and disposal of existing pavement and base material.

Curved Granite curb shall include all curb (except curb corners), cut to a specified radius, and set on curve.

Curb Corners and Curb Inlets will be paid for at the contract unit price each, complete in place.

Curbing removed and reset shall also include all labor and equipment required to remove the existing curb.

Gravel required for each item shall be included in the bid price for that item.

II. SIDEWALKS

3g. HOT MIX ASPHALT SIDEWALK

GENERAL

The work under this item shall include any saw-cutting, removal and disposal of existing sidewalk, roadway or driveway surface and base material, stripping any loam and subgrade material, re-grading the new sidewalk area, furnishing and placing of a new Hot Mix Asphalt sidewalk on a prepared gravel base course, and furnishing and placing 6” of loam on all adjacent disturbed areas and seeding and transitioning (smooth, similar materials, equivalent workmanship, etc.) new work to existing surfaces (walkways, driveways, etc.) at the back of sidewalks. Gravel and other unwanted materials shall be removed from adjacent excavated areas to a depth of at least six” before the placing of loam and seed. Tree roots in the excavated areas shall be properly root pruned according to industry best practice and will be inspected by a City Certified Arborist. Forms shall be kept at least four” away from trees. Tree pits shall include installation of a flexible porous paving surface.

The work shall be done in conformance with the applicable requirements of Section 701 of the Standard Specification. The pavement shall be constructed in two courses:

11/4 inch (compacted Thickness) Hot Mix Asphalt, top course and 11/4 inch (compacted thickness) Hot Mix Asphalt, binder course

MATERIALS

GRAVEL for foundations shall conform to the requirements for Gravel Base Course as specified with the maximum size of stone being three (3) inches.

HOT MIX ASPHALT shall conform to the requirements of Section M3.11.00 Hot Mix Asphalt of the Standard Specifications.

TREE PIT POROUS SURFACE MATERIAL shall include a urethane liquid binding agent and compatible aggregate (stone, rubber, etc.) per manufacturers requirements, extender oils not allowed. The finished product shall be ADA compliant, resistant to degradation, meet ASTM C 666/C 666M-03 (freeze/thaw) and provide an infiltration rate of 2,000 gallons/square foot/hour or higher.

LOAM shall be fertile, natural topsoil loam free from brush, weeds, stumps, roots, and other objectionable matter, and shall be free from all stones over two inches in size. Loam shall be approved by the Engineer prior to incorporation in the work.

GRASS SEED shall be of the previous year's crop and in no case shall the week seed content exceed 1% by weight. Seed shall be delivered to the work area in the original dealer's container, with each container bearing the dealer's guaranteed analysis. The grass seed shall conform to the requirements listed below:

DESCRIPTION

The sidewalk shall be constructed to provide proper drainage away from any walls or buildings. The finished surface of the sidewalk along the roadway shall be constructed to match the grade of the top of the granite curb unless shown or directed otherwise and shall slope a grade of 1.5%, with a construction tolerance of +/-0.5 % (2.0% maximum), toward the street to provide for proper drainage.

BASE COURSE

An eight-inch minimum (compacted thickness) gravel base course shall be placed upon the previously prepared subgrade and thoroughly compacted. The surface shall be parallel to the proposed surface of the walk.

MEASUREMENT

Hot Mix Asphalt sidewalk will be measured by the square yard of pavement, complete inplace.

PAYMENT

Hot Mix Asphalt sidewalk, including 8-inch gravel base, will be paid for at the Contract unit price per square yard, which price shall include all labor, materials, equipment and incidental costs required to complete the work above, including excavation and disposal of existing material, subgrade preparation and furnishing and placing 6” of loam on all adjacent disturbed areas and seeding.

3h and 3i. 4” and six” CEMENT CONCRETE SIDEWALK, RESPECTIVELY

GENERAL

The work under this item shall include any saw-cutting, removal and disposal of existing sidewalk, roadway or driveway surface and base material, stripping any loam and subgrade material, re-grading the new sidewalk area, furnishing and placing the new cement concrete sidewalks in one course on a proposed foundation of gravel and furnishing and placing 6” of loam on all adjacent disturbed areas and seeding and transitioning (smooth, similar materials, etc.) new work to existing surfaces (walkways, driveways, etc.) at the back or sidewalks, in accordance with these specifications. Gravel and other unwanted materials shall be removed from adjacent excavated areas to a depth of at least six” before the placing of loam and seed. Tree roots in the excavated areas shall be properly root pruned according to industry best practices and will be inspected by a City Certified Arborist. Forms shall be kept at least four” away from trees. Tree pits shall include installation of a flexible porous paving surface.

All materials and construction methods used shall meet Section 701 of the current Commonwealth of Massachusetts Department of Transportation Standard Specifications for Highways and Bridges, and as amended from time to time, with the following provisions.

MATERIALS

GRAVEL for foundations shall conform to the requirements for Gravel Base Course as specified with the maximum size of stone being three (3) inches.

CONCRETE shall conform to the requirements for airentrained cement concrete. It shall have a minimum compressive strength of four thousand #/sq inch at 28 days, minimum cement content 610 #/cu.yd., maximum aggregate size three-fourths inch and maximum per cent air 6%. TYPE II domestic Portland cement shall be used. No admixtures causing accelerated setting of cement in concrete shall be used. The consistency of the mix shall be regulated to give a slump of 1 to 3 inches. No hand mixing will be permitted.

TREE PIT POROUS SURFACE MATERIAL – SEE SECTION IV. TREES FOR ADDITIONAL INFORMATION.

PREFORMED EXPANSION JOINT FILLER shall be nonextruding type or resilient non bituminous type and conform to A.A.S.H.T.O. M153.

LOAM shall be fertile, natural topsoil loam free from brush, weeds, stumps, roots, and other objectional matter, and shall be free from all stones over two inches in size. Loam shall be approved by the Engineer prior to incorporation in the work.

GRASS SEED shall be of the previous year's crop and in no case shall the week seed content exceed 1% by weight. Seed shall be delivered to the work area in the original dealer's container, with each container bearing the dealer's guaranteed analysis. The grass seed shall conform to the requirements listed below: -

DESCRIPTION

SUBGRADE The subgrade for the sidewalks shall be shaped parallel to the proposed surface of the walks and shall be thoroughly rolled and tamped. All depressions occurring shall be filled with suitable material and again rolled or tamped until the surface is smooth and hard.

FOUNDATION After the subgrade has been prepared, a foundation of gravel shall be placed upon it. After being wetted and thoroughly rolled and tamped, the foundation shall be at least eight (8) inches in thickness and four (4) inches below and parallel to the proposed surface of the walk, except that at driveways it shall be six (6) inches below and parallel to the proposed surface of the walk. The gravel foundation shall be moistened before concrete is placed. Gravel and other unwanted materials shall be removed from adjacent excavated areas to a depth of at least six.” Tree roots in the excavated areas shall be properly root pruned according to industry best practices and will be inspected by a City Certified Arborist. Forms shall be kept at least four” away from trees.

TREE PITS Existing Tree Pits will be modified to create a reasonable area that promotes proper tree growth. New tree pits may be added to sidewalk areas at the discretion of the City of Salem. Modified or new tree pit dimensions and locations shall be approved by the City Engineer, or his designee. All tree pits shall have a flexible porous paving surface. See Section IV Trees for additional information.

FORMS Side and transverse forms shall be smooth, free from warp, of sufficient strength to resist springing out of shape, of a depth to conform to the thickness of the proposed walk, and of a type satisfactory to the Engineer. All mortar or dirt shall be completely removed from the forms that have been previously used. The forms shall be well staked and thoroughly braced and set to the established lines with their upper edge conforming to the grade of the finished walk which shall have sufficient pitch from the outside edge of the walk to provide for surface drainage but which shall not exceed a slope of 1.5%, with a construction tolerance of +/-0.5 % (2.0% maximum), unless otherwise directed. All forms shall be oiled before placing concrete.

CONCRETE The concrete shall be poured in alternate slabs thirty (30) feet in length except as otherwise ordered. The slabs shall be separated by transverse preformed expansion joint fillers onehalf (1/2) inch thick. Preformed expansion joint filler shall be placed adjacent to, or around existing structures where directed. Preformed waterproofing membrane shall be placed against building foundations, where directed. On the foundation as specified above the concrete shall be placed in such quantity that after being thoroughly rammed in place it shall be four (4) inches in depth and at driveways six (6) inches in depth. The concrete shall be worked and floated to give a smooth, uniform, and attractive surface finish. Concrete shall be transported from mixer to place of final deposit as rapidly and practicable by methods which prevent separation of ingredients, and which minimize re-handling. Re-tempering concrete will not be allowed. The surface of all concrete sidewalks shall be uniformly scored into block units of areas not more than thirtysix (36) square feet as directed. The depth of the scoring shall be at least onequarter (1/4) of the thickness of the sidewalk. The application of neat cement to surfaces to hasten hardening is prohibited. The finishing of concrete surfaces shall be done by experienced and competent cement finishers approved by the Engineer.

When completed, the walks shall be protected from traffic and weather for at least four (4) days. When pouring concrete driveway aprons, concrete shall be typically placed on Mondays and Tuesdays, so the abutter access will be restored by the weekend, any deviation from this sequence of work shall be approved in advanced in writing by the City Engineer, or his designee. Curing shall be by an approved moist curing method or by spraying with an approved curing compound. No concrete shall be mixed while the air temperature is below thirtythree degrees Fahrenheit (33 deg. F). In no case shall concrete be laid on a frozen foundation.

FIELD TESTS Sets of four (4) cylinders may be taken at random by the Engineer during the progress of the work, in conformity with ASTM Methods, Cthirty-one, two (2) of which shall be broken at seven (7) days and two (2) at twentyeight (28) days. The taking and breaking of the cylinders shall be at the City's expense. Slump tests will be made in the field by the Contractor at the director of the Engineer. The supplier of readymix concrete shall provide the City with an affidavit that the concrete supplied to the job conforms to these specifications.

PROTECTION The Contractor shall keep some of his own personnel or hire police protection, at his own expense, on the jobsite to protect the newly poured concrete from vandalism and injury until the concrete has sufficient set to minimize the chances of damage. Should any damage inadvertently occur the Contractor shall replace the entire square or squares affected.

CURING Immediately after the finishing operations have been completed and as soon as marring of the concrete will not occur, the entire surface of the newly placed concrete shall be covered and cured in accordance with one of the following methods:

1. Moist Curing:

Initial Curing: Strips of burlap saturated with water shall be placed on the fresh concrete surface carefully to avoid marring, strips to overlap at least three (3) inches. This burlap shall be kept thoroughly and continuously wet by sprinkling it with a fine spray of water until it is removed.

Final Curing: After 24 hours a second layer of burlap shall be added. This double layer shall remain in place and shall be kept thoroughly and continuously saturated with water for a period of four (4) days. Cotton mats may be used for final curing if approved by the Engineer.

2. Waterproof Paper Curing: The top surface and sides of the sidewalk shall be entirely covered with waterproof paper. Each paper cover shall not be less than 20 nor more than seventy-five feet in length and shall be of such width that, when in place, it will extend to at least eighteen inches beyond the edges of the slab to be covered. All rips or holes occurring in the paper covers while in use shall be immediately repaired to render them airtight. The paper shall be left in place for a period of 72 hours or longer, if necessary to obtain the required strength. The surface of the sidewalk shall be moist when the paper is placed.

3. Impervious Membrane Curing: After finishing operations have been completed, and immediately after the free water has left the surface, the surface of the slab shall be completely coated and sealed with a uniform layer of white pigmented curing compound. The compound shall be completely coated and sealed with a uniform layer of white pigmented curing compound. The compound shall be applied in a 2-coat continuous operation and at a total coverage of not less than one gallon per 150 sq. ft. of surface. The compounds shall be applied by means of a mechanical pressure sprayer, approved by the Engineer, to form a uniform, continuous, coherent film that shall not check, crack, or peel and shall be free of pin holes or other imperfections. The curing compound shall be of such character that the film will harden within 30 minutes after application. Should the film become damaged from any cause within the required curing period, the damaged portions shall be repaired immediately with additional compound. The treated surface shall be protected by the Contractor from injury for a period of at least 3 days. All traffic, foot or otherwise, will be considered injurious to the film of the applied compound.

4. White Polyethylene Sheeting: The general requirements for the use of white polyethylene sheets shall be those for waterproof paper curing above.

5. Curing in Cold Weather: During cold weather, when the air temperature may be expected to drop below 40F, a sufficient supply of loose dry hay or straw or other suitable blanketing material for covering shall be provided along the line of the work, and at any time when the air temperature may be expected to reach the freezing point during the day or night, the material so provided shall be spread to a sufficient depth to prevent freezing of the concrete. The period such protection shall be maintained shall be not less than 5 days or until the concrete has hardened thoroughly.