HARVARD-609213-134927-A-4.pdf

Ten Park Plaza, Suite 4160, Boston, MA 02116 Tel: 857-368-4636, TTY: 857-368-0655 mass.gov/massdot

July 23, 2026 Proposal No. 609213-134927

ADDENDUM NO. 4

To Prospective Bidders and Others on:

HARVARD

Federal Aid Project No. STP-0033(045)X

Resurfacing and Box Widening on Ayer Road, from Route 2 to the Ayer Town Line

PROPOSAL TO BE OPENED AND READ: TUESDAY, JULY 28, 2026 at 2:00 P.M.

Transmitting changes to the Contract Documents as follows:

QUESTIONS AND RESPONSES: One page.

DOCUMENT A00801: Revised Page 57.

DOCUMENT A00802: Revised Page 30 and inserted new pages 30.1 and 30.2.

Take note of the above, substitute the revised pages for the originals, insert the new pages in proper order and acknowledge Addendum No. 4 in your Expedite Proposal file before submitting your bid.

Very truly yours, Eric M. Cardone, P.E.

Construction Contracts Engineer

MB

DSK

c: Reardon, Muazzez G., Project Manager

THIS PAGE IS INTENTIONALLY LEFT BLANK

HARVARD

Federal Aid Project No. STP-0033(045)X

Resurfacing and Box Widening on Ayer Road, from Route 2 to the Ayer Town Line (609213-134927)

Questions and Responses Addendum No. 4, July 23, 2026

P.J. Albert, Inc., e-mail dated July 21, 2026

Question 2) We have been told by several suppliers that 48” Reinforced Concrete Arch Pipe

(Item 241.481) is not supplied by anyone in the New England Area. I have even asked a vendor in NJ but was also told they don’t supply it. Do you have a supplier you can recommend for this?

Response 2) See the revised Special Provisions, page A00801- 57.

J.H. Lynch & Sons, Inc., e-mail dated July 21, 2026

Question 5) Please confirm item 450.22 Superpave Surface Course (SSC-9.5) and item 450.23

Superpave Surface Course (SSC-12.5) are for the Shared Use Path.

Response 5) Confirmed. Items 450.22 and 450.23 are for the Shared Use Path.

Question 6) There are 2 different types of driveways called out in the pavement typical, residential and commercial. Can these driveways be called out on the plans or on the driveway details sheet as to distinguish which ones are which?

Response 6) See the revised Detail Sheets page A00802-30 and inserted new pages A00802-

30.1 and 30.2.

THIS PAGE IS INTENTIONALLY LEFT BLANK

Massachusetts Department Of Transportation Highway Division

A00801 - 57

Addendum No. 4, July 23, 2026

ITEM 241.481 48 INCH REINFORCED CONCRETE ARCH PIPE FOOT

The work under this item shall conform to the relevant provisions of Subsection 230 of the Standard Specifications and the following:

The work shall include furnishing and installing reinforced concrete arch pipe per the Construction Details included in the plans.

Bedding, backfill, and compaction requirements for reinforced concrete arch pipes shall be in accordance with AASHTO LRFD Bridge Construction Specifications for reinforced concrete arch pipes (Chapter 27).

MATERIALS

The contractor is responsible for selecting a manufacturer and furnishing a 48-inch reinforced concrete arch pipe.

The contractor shall submit the manufacturer’s product data, including catalog cut sheets, for the proposed 48-inch reinforced concrete arch pipe for review and approval before installation.

The contractor may submit products from the following manufacturers:

• United Concrete Products, Inc

• Rinker Materials

• Foley Products

• or approved equal

METHOD OF MEASUREMENT

Items 241.481 will be measured for payment by the unit Foot of 48 inch, Reinforced Concrete Arch Pipe, complete in place.

BASIS OF PAYMENT

Item 241.481 will be paid for at the Contract unit price bid per Foot of 48 Inch, Reinforced Concrete Arch Pipe, which price shall include all labor, materials, equipment, and incidental costs required to complete the work.

Bedding for reinforced concrete arch pipes will be paid for under Item 151.2 – Gravel Borrow for Backfilling Structures and Pipes.

A00802-30

ITEM 691. (Continued)

88+66 to 89+53 LT 90+98 to 91+09 LT 91+32 to 92+42 LT 91+62 to 92+00 RT

ITEM 691.1 BALANCE STONE WALL REMOVED AND STACKED

Ayer Road (Route 110/111) Station Offset 42+25 to 42+34 LT

Gebo Lane Station Offset 110+26 to 110+71 LT

Shared Use Path Station Offset 153+36 to 153+59 LT/RT

ITEM 697. SEDIMENTATION FENCE

17+50 to 22+11 LT

ITEM 698.3 GEOTEXTILE FABRIC FOR SEPARATION

To be used below stone for pipe ends.

ITEM 698.4 GEOTEXTILE FABRIC FOR PERMANENT EROSION CONTROL

To be used for streambed restoration areas.

A00802-30.1

ITEM 702. HOT MIX ASPHALT SIDEWALK OR DRIVEWAY

List of proposed HMA driveways separated by type

Station Offset Type

8+83 to 9+29 RT RESIDENTIAL 9+02 to 9+68 LT RESIDENTIAL

33+97 to 34+30 RT RESIDENTIAL 34+40 to 34+74 RT RESIDENTIAL 36+69 to 36+94 RT RESIDENTIAL 43+54 to 43+78 RT RESIDENTIAL 59+42 to 59+73 RT RESIDENTIAL 61+91 to 62+12 RT RESIDENTIAL 67+75 to 68+11 RT RESIDENTIAL 68+24 to 68+54 RT RESIDENTIAL 69+21 to 69+51 LT RESIDENTIAL 69+80 to 70+41 LT RESIDENTIAL 70+33 to 70+62 RT RESIDENTIAL 71+96 to 72+47 LT RESIDENTIAL 72+47 to 72+87 LT RESIDENTIAL 78+81 to 79+35 LT RESIDENTIAL 81+95 to 82+45 LT RESIDENTIAL 83+52 to 83+98 LT RESIDENTIAL 85+00 to 85+56 LT RESIDENTIAL 85+79 to 86+50 LT RESIDENTIAL 87+18 to 87+70 LT RESIDENTIAL 87+48 to 87+65 RT RESIDENTIAL 88+01 to 88+70 LT RESIDENTIAL 88+96 to 89+14 RT RESIDENTIAL 90+04 to 90+50 LT RESIDENTIAL 90+11 to 90+38 RT RESIDENTIAL 90+96 to 91+47 LT RESIDENTIAL 91+26 to 91+46 RT RESIDENTIAL 92+93 to 93+31 RT RESIDENTIAL 92+98 to 93+20 LT RESIDENTIAL 94+03 to 94+28 LT RESIDENTIAL 95+65 to 96+14 LT RESIDENTIAL

A00802-30.2

ITEM 702. (Continued)

Ayer Road (Route 110/111) Station Offset Type

10+48 to 11+03 LT COMMERCIAL 12+00 to 12+90 RT COMMERCIAL 12+44 to 12+79 LT COMMERCIAL 14+57 to 15+38 RT COMMERCIAL 14+57 to 15+50 LT COMMERCIAL 16+54 to 17+66 RT COMMERCIAL 17+78 to 18+26 RT COMMERCIAL 18+56 to 19+09 RT COMMERCIAL 23+18 to 23+86 LT COMMERCIAL 25+41 to 26+30 LT COMMERCIAL 28+64 to 29+02 LT COMMERCIAL 35+84 to 36+79 LT COMMERCIAL 42+10 to 43+02 LT COMMERCIAL 44+79 to 45+49 LT COMMERCIAL 45+22 to 45+69 RT COMMERCIAL 46+32 to 46+83 RT COMMERCIAL 46+61 to 47+21 LT COMMERCIAL 46+85 to 47+28 RT COMMERCIAL 49+20 to 49+62 RT COMMERCIAL 52+65 to 53+05 RT COMMERCIAL 53+23 to 53+76 RT COMMERCIAL 55+17 to 55+68 RT COMMERCIAL 57+39 to 58+26 LT COMMERCIAL 57+81 to 58+15 RT COMMERCIAL 59+36 to 59+93 LT COMMERCIAL 60+05 to 60+79 LT COMMERCIAL 62+39 to 62+81 RT COMMERCIAL 62+81 to 63+40 LT COMMERCIAL 63+62 to 64+03 RT COMMERCIAL 64+06 to 64+64 LT COMMERCIAL 74+08 to 74+63 LT COMMERCIAL 76+48 to 76+77 RT COMMERCIAL 77+23 to 78+06 LT COMMERCIAL 81+23 to 81+91 LT COMMERCIAL

Shared Use Path Station Offset Type

154+30 to 154+90 LT COMMERCIAL

ITEM 707.011 PLANTER REMOVED AND STACKED, LOCATION 1

45+81 to 46+02 LT