Addendum No.2 – ITB 26-23-214657 Bridge 158.7 Replacement.pdf

PDF 659 KB Posted Jul 2, 2026

Attached to: ITB 26-23-214657 ARRC BRIDGE 158. 7 REPLACEMENT
Solicitation number: ITB 26-23-214657 ARRC BRIDGE 158.7 REPLACEMENT
Issued by: Anchorage Municipality, Alaska

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Written by GovTribe AI · Jul 6, 2026

Addendum No. 2 to Invitation to Bid (ITB) 26-23-214657 issued by the Alaska Railroad Corporation provides clarifications and updates to the Bridge 158.7 Replacement project located at Milepost 158.7 near Cottonwood Creek in Wasilla. This addendum addresses a bidder question regarding material quantities for Type A and Type C fill materials by providing corrected quantities that account for fill areas within sheet pile cells and track prism configurations. The revised pay item quantities are 174 tons for Selected Material Type A (Pay Item 203.0006.1) and 237 tons for Selected Material Type C (Pay Item 203.0006.2). The project scope includes complete replacement of an existing timber bridge with a new two-span precast concrete ballast deck bridge on steel pipe piles, sheet pile abutments, reinforced concrete pile caps, bulkhead and riprap installation, track work, and site restoration. The comprehensive bid schedule encompasses 50 pay items in the base bid including clearing and grubbing (2.55 acres), unclassified excavation (337 cubic yards), structural steel piles and sheet piles, concrete work, track work (120 track feet), and two additive alternatives for concrete barriers and temporary railroad crossing. Sealed proposals were originally due June 30, 2026, at 3:00 p.m. at Alaska Railroad Corporation, 327 W. Ship Creek Avenue, Anchorage, AK 99501, with the deadline subsequently extended to July 15, 2026, per Addendum No. 1. A non-mandatory site visit was scheduled for June 23, 2026, at 12:00 p.m. at the Wasilla Section House. Substantial completion is required by January 30, 2027, with final completion by June 30, 2027.

Bidders must submit a bid bond equal to 5 percent of the bid price, along with a construction bid form, contractor responsibility questionnaire, and detailed cost schedule. The apparent low bidder must additionally provide a subcontractor list, quality assurance/quality control plan, and site health and safety plan within five working days of notification. The successful contractor must furnish 100 percent performance and payment bonds and a certificate of insurance prior to contract award. Liquidated damages of $4,900 per calendar day apply for failure to achieve substantial completion by the deadline. The project is jointly funded by the Alaska Railroad Corporation and the Federal Transit Administration, triggering federal contract compliance requirements for projects exceeding $100,000, including a race-neutral Disadvantaged Business Enterprise (DBE) aspiration of 4.0 percent participation during fiscal years 2025-2027. Prevailing wage requirements per the Minimum Rates of Pay for Laborers and Mechanics effective April 1, 2026, apply to all workers. Contractors must register with Avetta for verification and submit weekly certified payrolls within seven days of each pay period. Precast concrete bridge span halves and pile caps are furnished by ARRC from its Anchorage warehouse, with the contractor responsible for transportation, assembly, and installation. All structural steel must be hot-dip galvanized per ASTM A123 at 2.3 ounces per square foot, and prestressed concrete must achieve 6,000 PSI at 28 days. The bridge design complies with Cooper E-80 live loads, 0.25 coefficient seismic parameters, and 200 PSI ice pressure loads.

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Other files

File	Type	Posted
Addendum No. 4 – ITB 26-23-214657 Bridge 158.7 Replacement.pdf	PDF	Jul 10, 2026
Addendum No.3 – ITB 26-23-214657 Bridge 158.7 Replacement.pdf	PDF	Jul 2, 2026
Bid Abstract signed final.pdf	PDF	Jun 24, 2026
Addendum No.1 – ITB 26-23-214657 Bridge 158.7 Replacement.pdf	PDF	Jun 24, 2026
Typical Sections-1.01.pdf	PDF	Jun 9, 2026
BR158.7 CBD IFB CAO 5.22.26.pdf	PDF	Jun 9, 2026
CBD Standards 2025 RevI.pdf	PDF	Jun 9, 2026
ITB 26-23-214657 ARRC Bridge 158.7 Replacement.pdf	PDF	Jun 9, 2026
S-2.16 End Track and Bridge.pdf	PDF	Jun 9, 2026

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ALASKA RAILROAD CORPORATION

327 W. Ship Creek Ave.

Anchorage, AK 99501 wallaces@akrr.com

Phone (907)265-2425 Cell (907)744-0031

ADDENDUM NO. 2

Invitation to Bid (ITB) 26-23-214657 Bridge 158.7 Replacement Alaska Railroad Corporation Date: June 30, 2026

This Addendum No. 2 is issued to provide clarification in response to a bidder question, incorporate a revised plan sheet, and updated cost schedule. All other terms and conditions of the referenced solicitation remain unchanged.

QUESTION AND ANSWERS:

9. Using the Typical Bulkhead Section Sht 10 of 12 and the Proposed Plan and Profile Sht 08 of 12, I am coming up with substantially more Type A and Type C material quantities.

a. The Type C doesn’t appear to take into account the fill area outside the track prism but within the sheet pile cell and also the fact there is no track prism on the south end?

b. Type A and doesn’t appear to take into account the lack of track prism on the south side?

Quantities for both Type A and C fill have been double checked and need the following revision;

Type C, the correct quantity is 237 tons, Type A, the correct quantity is 174 tons. These updated quantities now account for the areas within the sheet pile cell and the track prism outside of the sheet pile cell.

PAY ITEMS (REVISED PAY SCHEDULE BELOW)

Pay Item 203.0006.1: 174 tons (Type A) Pay Item 203.0006.2: 237 tons (Type C)

ATTACHMENT (REVISIED) BR158.7 REPLACEMENT CBD, Page 3 of 12, dated June 6, 2026, this page supersedes all prior versions and replaces the previous version in its entirety.

Please acknowledge receipt of this and all addenda in your firms Supply Bid Form (Form 395-0129).

Sincerely, Contract Administration Specialist Alaska Railroad Corporation mailto:wallaces@akrr.com

SECTION H

(UPDATED) COST SCHEDULE

COST SCHEDULE:

A Bidder’s Failure to provide the information requested in this Appendix may be cause for rejection of the bid on the basis on non-responsiveness. Cost shall be bid in accordance with all specifications and any Technical Specifications incorporated herein.

AWARD CRITERIA:

A contract award resulting from this solicitation may be made to the low, responsive, responsible bidder who meets the requirements as set forth in the Plans and specifications and compliance thereof. An award may be made in the aggregate of Base Bid and or any combination of Base Bid and Add Alternates, whichever is deemed by the Contract Administrator to be in the best interest of the ARRC. The successful bidder shall hold unit prices of all additives firm for a period of thirty (30) days from the date of bid opening. Award is contingent on the availability of ARRC funds.

BR 158.7 REPLACEMENT BASE BID

Pay Item No.

Item Description Unit Quantity Unit Bid

Price Amount Bid

201.0003 Clearing and Grubbing ACRE 2.55

202.0023 Removal of Existing Bridge and Structures

LS 1

203.0003 Unclassified Excavation CY 337

203.0006.1 Selected Material, Type A TON 174

203.0006.2 Selected Material, Type C TON 237

203.2036 Temporary Access LS 1

301.0005 Railroad Sub-ballast, Grading C-1 TON 108

309.0001 Railroad Ballast, Type 3 TON 160

501.0004.1 Class A Concrete, 12"ø x 0.500”t Pile

CY 6

501.0004.2 Class A Concrete, 12"ø x 0.500”t Bollard

CY 1

501.0004.3 Class A Concrete, 24"ø x 0.500”t Pile

CY 6

501.0007.1 Install Precast Concrete Member, 28’ CBD Span

EA 2

501.0007.2 Install Precast Concrete Member, Double Row Cap

EA 3

BR 158.7 REPLACEMENT BASE BID (continued)

Pay Item No.

Item Description Unit Quantity

Unit Bid

Price Amount Bid

503.0001.1 Furnish Reinforcing Steel, 12"ø Pile Cages

LS 1

503.0001.2 Furnish Reinforcing Steel, 24"ø Pile Cages

LS 1

504.0001.1 Furnish Structural Steel, 28’ CBD Falloff Materials

EA 2

504.0001.2 Furnish Structural Steel, Walkway with Handrail Assembly

LS 1

504.0003.1 Install Structural Steel, 28’ CBD Falloff Materials

EA 2

504.0003.2 Install Structural Steel, Walkway with Handrail Assembly

LS 1

505.0005.1 Furnish Structural Steel Piles, 12”ø x 0.500”t Pipe

LF 760

505.0005.2 Furnish Structural Steel Piles, 16”ø x 0.500”t Pipe

LF 240

505.0005.3 Furnish PS-31 Sheet Pile (35 ft Length, ASTM A572, Grade 50)

EA 50

505.0005.4 Furnish PS-31 90° T Pile (35 ft Length, ASTM A572, Grade 50)

EA 8

505.0005.5 Furnish HP12x63 PS-31 Soldier Pile (40 FT Length, ASTM A572, Grade 50)

EA 4

505.0006.1 Drive Structural Steel Piles, 12”ø x 0.500”t Pipe

EA 12

505.0006.2 Drive Structural Steel Piles, 12”ø x 0.500”t Pipe Bollard

EA 2

505.0006.3 Drive Structural Steel Piles, 24”ø x 0.500”t Pipe

EA 3

505.0006.4 Drive Structural Steel Piles, HP12x63 PS-31 Soldier

EA 4

505.0010 Structural Steel Sheet Piles, PS-31 Piles

LS 1

505.2002.1 Pile Pre-Bore, 12”ø Piles EA 12

505.2002.2 Pile Pre-Bore, 24”ø Piles EA 3

505.2002.3 Pile Pre-Bore, HP12x63 PS-31 Soldier

EA 4

607.0003 Chain Link Fence LF 304

611.0001 Riprap, Class II CY 318

615.0001 Standard Sign, Bridge Sign – Type D

SF 2.25

618.0001 Seeding AC 2.55

631.0002 Geotextile, Erosions Control, Class

SY 192

640.0001 Mobilization and Demobilization LS 1

641.0001 Erosion, Sediment and Pollution Control Administration

LS 1

641.0003 Temporary Erosion, Sediment and Pollution Control

LS 1

642.0001 Construction Surveying LS 1

643.0002 Traffic Maintenance LS 1

643.0023 Traffic Price Adjustment CS - - - - - - - - -

646.0001 CPM Scheduling LS 1

647.0001 As-Built Drawings and Specifications

LS 1

802.0001 Track Work, 115# RE Rail TF 120

802.0005 Track Tamping, Surfacing, and Final Dressing

TF 256

803.0001 Track Removal TF 120

Total Base Bid:

BR 158.7 REPLACEMENT ADDITIVE ALTERNATE

Pay Item No.

Item Description Unit Quantity

Unit Bid

Price Amount Bid

614.0001 Concrete Barrier LF 128

520.0001 Temporary Crossing LS 1

Total Additive Alternative Bid:

NOTES:

Bid quantities are approximate. Contractor is responsible for their own quantity take-offs using the information within the Contract Documents to verify the quantities in the Bid Schedule.

NON-COLLUSION AFFIDAVIT:

The Undersigned declares, under penalty of perjury under the laws of the United States, that neither he/she nor the firm, association, or corporation of which he/she is a member, has, either directly or indirectly, entered into any agreement, participated in any collusion, or otherwise taken any action in restraint of free competitive bidding in connection with this Bid.

The Undersigned has read the foregoing proposal and hereby agrees to the conditions stated therein by affixing his/her signature below:

BIDDER’S NAME AND ADDRESS:

COMPANY NAME SIGNATURE BY AND FOR THE BIDDER

COMPANY MAILING ADDRESS PRINTED NAME OF ABOVE BIDDER

CITY, STATE ZIP CODE DATE OF BID

CONTACT PHONE NUMBER CONTACT E-MAIL

BR158.7 REPLACEMENT CBD

PROJECT STATIONS: 13+28.87 TO 15+84.87

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MP158.7

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1. PAY ITEM QUANTITIES ARE APPROXIMATE. CONTRACTOR IS RESPONSIBLE FOR THEIR OWN QUANTITY TAKE-OFFS USING THE INFORMATION PAY ITEM QUANTITIES ARE APPROXIMATE. CONTRACTOR IS RESPONSIBLE FOR THEIR OWN QUANTITY TAKE-OFFS USING THE INFORMATION WITHIN THE CONTRACT DOCUMENTS TO VERIFY THE QUANTITIES LISTED HEREON. 2. BALLAST REQUIRED FOR TAMPING AND SURFACING TO BE SUBSIDIARY TO TRACK WORK.BALLAST REQUIRED FOR TAMPING AND SURFACING TO BE SUBSIDIARY TO TRACK WORK.

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TABLE OF ESTIMATING FACTORS

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ITEM DESCRIPTION

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ESTIMATING FACTOR

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TRACK BALLAST, TYPE 3

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110 LB/FT 3

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SELECTED MATERIAL

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135 LB/FT 3

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AGGREGATE BASE COURSE , GRADING C-1

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144 LB/FT 3

AutoCAD SHX Text ITEMS FURNISHED BY ARRC: 1. PRECAST CBD SPAN HALVES AND PILE CAPS SHALL BE FURNISHED BY ARRC. CONTRACTOR IS PRECAST CBD SPAN HALVES AND PILE CAPS SHALL BE FURNISHED BY ARRC. CONTRACTOR IS RESPONSIBLE FOR TRANSPORTING ALL PRECAST CONCRETE MEMBERS FROM THE ANCHORAGE WAREHOUSE TO THE SITE, ASSEMBLING, AND SETTING IN PLACE.

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SUMMARY OF ESTIMATED QUANTITIES PROVIDED BY ARRC

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DESCRIPTION

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UNIT

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QUANTITY

AutoCAD SHX Text 7"x9"x8'-6" TIE

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AutoCAD SHX Text 7"x9"x10'-0" TIE

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MISC. TRACK MATERIAL (TIE PLATES, ETC.)

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ALL REQ'D

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NEW 115RE RAIL

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PRECAST CONCRETE CBD (HALF SPAN)

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PRECAST CONCRETE DOUBLE ROW PILE CAP

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PROJECT:

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SHEET TITLE:

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AutoCAD SHX Text P:\ENGINEERING\BRIDGES\BR 158_7 COTTONWOOD CREEK\2022 BRIDGE REPLACEMENT PROGRAM\BR 158.7 CBD REPLACEMENT.DWG

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PUBLISHED CTB

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DRAWING LOCATION

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DATE TIME

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SCALE

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ENGINEERING DEPARTMENT

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P.O. BOX 107500 BOX 107500 ANCHORAGE, ALASKA 99510-7500

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SHEET

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YEAR

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AFE NO.

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AS NOTED

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CHECKED BY:

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DRAFTED BY:

AutoCAD SHX Text ALASKA RAILROAD CORPORATION PO BOX 107500, ANCHORAGE, AK 99510-7500 327 W SHIP CREEK AVE ANCHORAGE, AK 99501 (907) 265-2300

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KEY MAP

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ANCHORAGE

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SEWARD

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FAIRBANKS

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BR158.7 REPLACEMENT CBD

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ESTIMATE OF QUANTITIES

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BLG

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BAO

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BLG

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ARRC_CTB_2023.CTB

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6/26/2026 1:24 PM

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TABLE OF PAY ITEMS

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PAY ITEM

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ITEM DESCRIPTION

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PAY UNIT

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TOTAL QUANTITY

AutoCAD SHX Text 201.0003

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CLEARING AND GRUBBING

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AutoCAD SHX Text 2.55

AutoCAD SHX Text 202.0023

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REMOVAL OF EXISTING BRIDGE AND STRUCTURES

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AutoCAD SHX Text 203.0003

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UNCLASSIFIED EXCAVATION

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AutoCAD SHX Text 203.0006.1

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SELECTED MATERIAL, TYPE A

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TON

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AutoCAD SHX Text 203.0006.2

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SELECTED MATERIAL, TYPE C

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TON

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AutoCAD SHX Text 203.2036

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TEMPORARY ACCESS

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AutoCAD SHX Text 301.0005

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AGGREGATE BASE (SUBBALLAST), GRADING C-1

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TON

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AutoCAD SHX Text 309.0001

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RAILROAD BALLAST, TYPE 3

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TON

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AutoCAD SHX Text 501.0004.1

AutoCAD SHX Text CLASS A CONCRETE, 12"ø x 0.500”t PILEt PILE

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AutoCAD SHX Text 501.0004.2

AutoCAD SHX Text CLASS A CONCRETE, 12"ø x 0.500”t BOLLARDt BOLLARD

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AutoCAD SHX Text 501.0004.3

AutoCAD SHX Text CLASS A CONCRETE, 24"ø x 0.500”t PILEt PILE

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AutoCAD SHX Text 501.0007.1

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INSTALL PRECAST CONCRETE MEMBER, 28' CBD SPAN

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AutoCAD SHX Text 501.0007.2

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INSTALL PRECAST CONCRETE MEMBER, DOUBLE ROW PILE CAP

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AutoCAD SHX Text 503.0001.1

AutoCAD SHX Text FURNISH REINFORCING STEEL, 12"ø PILE CAGES

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AutoCAD SHX Text 503.0001.2

AutoCAD SHX Text FURNISH REINFORCING STEEL, 24"ø PILE CAGES

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AutoCAD SHX Text 504.0001.1

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FURNISH STRUCTURAL STEEL, 28' CBD FALLOFF MATERIALS

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AutoCAD SHX Text 504.0001.2

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FURNISH STRUCTURAL STEEL, WALKWAY WITH HANDRAIL ASSEMBLY

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AutoCAD SHX Text 504.0003.1

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INSTALL STRUCTURAL STEEL, 28' CBD FALLOFF MATERIALS

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AutoCAD SHX Text 504.0003.2

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INSTALL STRUCTURAL STEEL, WALKWAY WITH HANDRAIL ASSEMBLY

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AutoCAD SHX Text 505.0005.1

AutoCAD SHX Text FURNISH STRUCTURAL STEEL PILES, 12"Ø x 0.500"t PIPE

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AutoCAD SHX Text 505.0005.2

AutoCAD SHX Text FURNISH STRUCTURAL STEEL PILES, 24"Ø x 0.500"t PIPE

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AutoCAD SHX Text 505.0005.3

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FURNISH PS-31 SHEET PILE (35 FT LENGTH, ASTM A572, GRADE 50)

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AutoCAD SHX Text 505.0005.4

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FURNISH PS-31 90° T PILE (35 FT LENGTH, ASTM A572, GRADE 50)

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AutoCAD SHX Text 505.0005.5

AutoCAD SHX Text FURNISH HP12x63 PS-31 SOLDIER PILE (40 FT LENGTH, ASTM A572, GRADE 50)

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AutoCAD SHX Text 505.0006.1

AutoCAD SHX Text DRIVE STRUCTURAL STEEL PILES, 12"ø PIPE

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AutoCAD SHX Text 505.0006.2

AutoCAD SHX Text DRIVE STRUCTURAL STEEL PILES, 12"ø PIPE BOLLARD

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AutoCAD SHX Text 505.0006.3

AutoCAD SHX Text DRIVE STRUCTURAL STEEL PILES, 24"ø PIPE

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AutoCAD SHX Text 505.0006.4

AutoCAD SHX Text DRIVE STRUCTURAL STEEL PILES, HP12x63 PS-31 SOLDIER

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AutoCAD SHX Text 505.0010

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STRUCTURAL STEEL SHEET PILES, PS-31 PILES

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PILE PRE-BORE, 12"Ø PILES

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PILE PRE-BORE, 24"Ø PILES

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AutoCAD SHX Text 505.2002.3

AutoCAD SHX Text PILE PRE-BORE, HP12x63 PS-31 SOLDIER

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AutoCAD SHX Text 607.0003

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CHAIN LINK FENCE

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AutoCAD SHX Text 611.0001

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RIPRAP, CLASS II

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AutoCAD SHX Text 615.0001

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STANDARD SIGN, BRIDGE SIGN - TYPE D

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AutoCAD SHX Text 2.25

AutoCAD SHX Text 618.0001

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SEEDING

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AutoCAD SHX Text 2.55

AutoCAD SHX Text 631.0002

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GEOTEXTILE, EROSION CONTROL, CLASS 1

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AutoCAD SHX Text 640.0001

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MOBILIZATION AND DEMOBILIZATION

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AutoCAD SHX Text 641.0001

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EROSION, SEDIMENT, AND POLLUTION CONTROL ADMINISTRATION

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AutoCAD SHX Text 641.0003

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TEMPORARY EROSION, SEDIMENT, AND POLLUTION CONTROL

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AutoCAD SHX Text 642.0001

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CONSTRUCTION SURVEYING

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AutoCAD SHX Text 643.0002

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TRAFFIC MAINTENANCE

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AutoCAD SHX Text 643.0023

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TRAFFIC PRICE ADJUSTMENT

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AutoCAD SHX Text 646.0001

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CPM SCHEDULING

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AutoCAD SHX Text 647.0001

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AS-BUILT DRAWINGS AND SPECIFICATIONS

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AutoCAD SHX Text 802.0001

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TRACK WORK, 115# RE RAIL

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AutoCAD SHX Text 802.0005

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TRACK TAMPING, SURFACING, AND FINAL DRESSING

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AutoCAD SHX Text 803.0001

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TRACK REMOVAL

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ADDITIVE ALTERNATE

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PAY ITEM

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ITEM DESCRIPTION

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PAY UNIT

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TOTAL QUANTITY

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CONCRETE BARRIER

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TEMPORARY RAILROAD CROSSING

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ADDENDUM NO. 2

QUESTION AND ANSWERS:

File details come from the government source that posted it. Updated Jul 6, 2026.