W911KB25R0018-0005.pdf

KET005

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

The purpose of this amendment is to incorporate the follow ing changes:

1. Update Section 00 11 01, Proposal Schedule.

2. Add Provision 52.217-4 and Clause 52.217-7.

3. Update Clause 52.211-10.

4. Update Section 01 20 00, Price and Payment Procedures, paragraph 1.3.

5. Update Section 01 91 41, Concrete Floating Breakwater Performance Requirements, paragraph 1.4.2.1.

The point of contact for this amendment is Jennifer Gosh at Jennifer.Gosh@usace.army.mil.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 5

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 17-Apr-2025

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W911KB25R0018

X 9B. DATED (SEE ITEM 11)

28-Feb-2025

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

17-Apr-2025

CODE

U.S. ARMY ENGINEER DISTRICT, AK

CEPOA-CT (W911KB)

2204 TALLEY AVENUE

JBER AK 99506-0898

W911KB 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W911KB25R0018

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION 00 11 01 - CLIN SCHEDULE

The following have been modified:

PROPOSAL SCHEDULE

KET005 FLOATING BREAKWATER REPLACEMENT

BAR POINT HARBOR

KETCHIKAN, ALASKA

Item Unit No. Description Quantity Unit Price Amount

BASE ITEMS

0001 Mobilization and Demobilization, complete. 1 Job $________ $________

0002 Demolish Existing Main Floating Breakwater, complete. 1 Job $________ $________

0003 Design Main Floating Breakwater, complete. 1 Job $________ $________

0004 Construct Main Floating Breakwater, complete. 1 Job $________ $________

Total of Base Items 0001 thru 0004 $_________

OPTION ITEMS

0005 Demolish Existing Entrance Floating Breakwater, Complete. 1 Job $________ $________

0006 Design Entrance Floating Breakwater, Complete. 1 Job $________ $________

0007 Construct Existing Entrance Floating Breakwater, Complete. 1 Job $________ $________

Total of Option Items 0005 thru 0007 $_________

NOTES:

1. See SECTION 01 20 00 PRICE AND PAYMENT PROCEDURES for work included in each item.

EVALUATION OF OFFERS:

1. AWARD: Award will be made in accordance with Section 00 22 11 –

EVALUATION FACTORS AND BASIS OF AWARD.

2. AWARD OF OPTION ITEMS: If awarded, all option items will be awarded at the same time as base items.

2. INCOMPLETE PROPOSALS: Failure to submit a proposal on all items in the schedule will result in an incomplete proposal and the proposal may be rejected. Prices must be shown for each item within the schedule.

-- END OF PROPOSAL SCHEDULE --

SECTION 00 21 00 - INSTRUCTIONS, CONDITIONS, AND NOTICES TO OFFERORS

The following have been added by full text:

52.217-4 EVALUATION OF OPTIONS EXERCISED AT TIME OF CONTRACT AWARD (JUN 1988)

Except when it is determined in accordance with FAR 17.206(b) not to be in the Government's best interests, the Government will evaluate the total price for the basic requirement together with any option(s) exercised at the time of award.

(End of provision)

SECTION 00 72 00 - CONTRACT CLAUSES

The following have been added by full text:

52.217-7 OPTION FOR INCREASED QUANTITY--SEPARATELY PRICED LINE ITEM (MAR 1989)

The Government may require the delivery of the numbered line item, identified in the Schedule as an option item, in the quantity and at the price stated in the Schedule. The Contracting Officer may exercise the option at the time of award. Delivery of added items shall continue at the same rate that like items are called for under the contract, unless the parties otherwise agree.

(End of clause)

The following have been modified:

52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984)

The Contractor shall be required to (a) commence work under this contract within ten (10) calendar days after the date the Contractor receives the notice to proceed, (b) prosecute the work diligently, and (c) complete the entire work ready for use not later than AM0005... 30 October 2027 ...AM0005. The time stated for completion shall include final cleanup of the premises.

(End of clause)

(End of Summary of Changes)

AM0005 FLOATING BREAKWATER REPLACEMENT, BAR POINT HARBOR KET005

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 20 00

PRICE AND PAYMENT PROCEDURES

PART 1 GENERAL

1.1 CONTRACT COST BREAKDOWN

1.2 CONTRACTOR'S PAY REQUESTS

1.2.1 Submission of Pay Requests

1.2.2 Final Pay Requests

1.3 SINGLE JOB PAYMENT ITEMS

1.3.1 Mobilization and DemobilizationAM0005... , complete. ...AM0005

1.3.1.1 Payment

1.3.1.2 Unit of Measure

1.3.2 AM0005... Demolish ...AM0005 Existing AM0005... Main ...AM0005 Floating Breakwaters, complete.

1.3.2.1 Payment

1.3.2.2 Unit of Measure

1.3.3 Design Main Floating BreakwaterAM0005... Deleted Text ...AM0005, complete.

1.3.3.1 Payment

1.3.3.2 Unit of Measure

1.3.4 Construct Main Floating Breakwater, complete.

1.3.4.1 Payment

1.3.4.2 Unit of Measure

1.3.5 AM0005... Option - Demolish Existing Entrance Channel Floating Breakwater, complete.

1.3.5.1 Payment

1.3.5.1.1 Unit of Measure

1.3.6 Option - Design Entrance Floating Breakwater, complete.

1.3.6.1 Payment

1.3.6.2 Unit of Measure

1.3.7 AM0005... Option - ...AM0005 Construct Entrance Floating Breakwater, complete.

1.3.7.1 Payment

1.3.7.2 Unit of Measure

PART 2 PRODUCTS

PART 3 EXECUTION

-- End of Section Table of Contents --

SECTION 01 20 00 Page 1

SECTION 01 20 00

PRICE AND PAYMENT PROCEDURES

PART 1 GENERAL

1.1 CONTRACT COST BREAKDOWN

The Contractor must furnish within 30 days after the date of Notice to Proceed, and prior to the submission of its first partial payment estimate, a breakdown of its single job pay item or items which will be reviewed by the Contracting Officer as to propriety of distribution of the total cost to the various accounts. Any unbalanced items as between early and late payment items or other discrepancies will be revised by the Contracting Officer to agree with a reasonable cost of the work included in the various items. This Contract cost breakdown will then be utilized as the basis for progress payments to the Contractor.

1.2 CONTRACTOR'S PAY REQUESTS

1.2.1 Submission of Pay Requests

Monthly pay requests and supporting forms for work performed must be submitted to the Contracting Officer within 5 calendar days of the end of the period covered by the pay request.

1.2.2 Final Pay Requests

a. A final pay request must be accompanied by the certification required by DFARS 252.247.7023 Transportation of Supplies by Sea, and the Contractor's Final Release. If the Contractor is incorporated, the Final Release must contain the corporate seal. An officer of the corporation must sign and the corporate secretary must certify the Final Release.

b. Final pay requests not accompanied by the Contractor's Final Release and required certification of Transportation of Supplies by Sea will be considered incomplete and will be returned to the Contractor.

1.3 SINGLE JOB PAYMENT ITEMS

Payment items for the work of this Contract for which Contract job payments will be made are listed in the PROPOSAL SCHEDULE and described below. All costs for items of work, which are not specifically mentioned to be included in a particular job or unit price payment item, are included in the listed job item most closely associated with the work involved. The job price and payment made for each item listed constitutes full compensation for furnishing all plant, labor, materials, and equipment, and performing any associated Contractor quality control, environmental protection, meeting safety requirements, tests and reports, and for performing all work required for which separate payment is not otherwise provided.

SECTION 01 20 00 Page 2

1.3.1 Mobilization and Demobilization AM0005... , complete. ...AM0005

1.3.1.1 Payment

Payment will be made for costs associated with mobilization and demobilization, as defined in Special Contract Clause PAYMENT FOR

MOBILIZATION AND DEMOBILIZATION.

1.3.1.2 Unit of Measure

Unit of measure: job.

1.3.2 AM0005... Demolish ...AM0005 Existing AM0005... Main ...AM0005 Floating Breakwaters, complete.

1.3.2.1 Payment

Payment will be made for all costs associated with removal and salvage or disposal of the existing main AM0005... deleted text ...AM0005 floating breakwater and AM0005... deleted text ...AM0005 associated chain mooring systems. See Section 01 19 40.00 29 SPECIAL ITEMS (CIVIL WORKS) for items to be salvaged.

1.3.2.2 Unit of Measure

Unit of measure: job.

1.3.3 Design Main Floating Breakwater AM0005... Deleted Text ...AM0005 , complete.

1.3.3.1 Payment

Payment will be made for all costs associated with design of the AM0005...

main floating breakwater ...AM0005 and associated mooring components as necessary.

1.3.3.2 Unit of Measure

Unit of measure: job.

1.3.4 Construct Main Floating Breakwater, complete.

1.3.4.1 Payment

Payment will be made for all costs associated with the production, delivery and installation of the main floating breakwater and anchoring system.

1.3.4.2 Unit of Measure

Unit of measure: job.

1.3.5 AM0005... Option - Demolish Existing Entrance Channel Floating Breakwater, complete.

1.3.5.1 Payment

Payment will be made for all costs associated with removal and salvage or disposal of the existing entrance channel floating breakwater and

SECTION 01 20 00 Page 3 associated chain mooring systems. See Section 01 19 40.00 29 SPECIAL ITEMS (CIVIL WORKS) for items to be salvaged.

1.3.5.1.1 Unit of Measure

Unit of measure: job.

1.3.6 Option - Design Entrance Floating Breakwater, complete.

1.3.6.1 Payment

Payment will be made for all costs associated with design of the entrance channel floating breakwater and associated mooring components as necessary.

1.3.6.2 Unit of Measure

Unit of measure: job. ...AM0005

1.3.7 AM0005... Option - ...AM0005 Construct Entrance Floating Breakwater, complete.

1.3.7.1 Payment

Payment will be made for all costs associated with the production, delivery and installation of the entrance floating breakwater and anchoring system.

1.3.7.2 Unit of Measure

Unit of measure: job.

PART 2 PRODUCTS

Not used.

PART 3 EXECUTION

Not used.

-- End of Section --

SECTION 01 20 00 Page 4

AMD005 FLOATING BREAKWATER REPLACEMENT, BAR POINT HARBOR KET005

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 91 41

CONCRETE FLOATING BREAKWATER PERFORMANCE REQUIREMENTS

04/21

PART 1 GENERAL

1.1 SCOPE

1.2 REFERENCES

1.3 SUBMITTALS

1.4 QUALITY CONTROL

1.4.1 Manufacturer Qualifications

1.4.2 Concrete Floating Breakwater Loading

1.4.2.1 Wave Loading - Installed Position

1.4.2.2 Loading - Construction Related Activities

1.4.2.3 Transient Mooring Wind Loading

1.4.2.4 Extreme Wind Loading

1.4.2.5 Vertical Live Load Capacity

1.4.3 Concrete Floating Breakwater Performance

1.4.3.1 Wave Transmission - Installed Position

1.4.3.2 Draft Restrictions

1.4.4 Concrete Floating Breakwater Anchor Requirements

1.5 DESIGN REQUIREMENTS

1.5.1 Precast Concrete Floating Breakwater Design and Anchorage

Calculations and Drawings

1.5.2 Construction Plan

1.5.3 Shop Drawings

1.6 DESIGN CRITERIA REFERENCES

1.7 QUALITY REQUIREMENTS

1.8 TURN OVER REQUIREMENTS

1.8.1 As-Built Survey

PART 2 PRODUCTS

2.1 CONCRETE

2.1.1 Concrete Durability Calculations

2.1.2 Concrete Reinforcement

2.2 CONCRETE EMBEDMENTS

2.3 STRESSING TENDONS AND ACCESSORIES

2.4 ANCHORING SYSTEM

2.5 CONCRETE FLOATING BREAKWATER OUTFITTING

PART 3 EXECUTION

-- End of Section Table of Contents --

SECTION 01 91 41 Page 1

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SECTION 01 91 41 Page 2

SECTION 01 91 41

CONCRETE FLOATING BREAKWATER PERFORMANCE REQUIREMENTS

04/21

PART 1 GENERAL

1.1 SCOPE

The work includes the provision of precast, concrete floating breakwater modules herein referred to as concrete floating breakwater, and all other items relating to the concrete floating breakwater system including the anchor system. Precast floating breakwater shall be the product of a manufacturer specializing in the production of precast concrete floating breakwaters with a minimum of 3 projects and 15 -years of experience in the manufacture of precast concrete floating breakwaters.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

U.S. DEPARTMENT OF DEFENSE (DOD)

UFC 1-300-02 (2014, with Change 2, 2019) Unified Facilities Guide Specifications (UFGS) Format Standard

UFC 3-201-01 (2018) Civil Engineering

UFC 3-220-01 (2012) Geotechnical Engineering

UFC 3-301-01 (2019) Structural Engineering

UFC 4-150-06 (2010) Military Harbors and Coastal Facilities

UFC 4-152-01 (2017) Design: Piers and Wharves

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Construction Plan ; G

SD-02 Shop Drawings

SECTION 01 91 41 Page 3

Shop Drawings ; G

Design Drawings ; G

SD-05 Design Data

Calculations ; G

Concrete durability calculations ; G

SD-07 Certificates

Manufacturer Qualifications ; G

SD-11 Closeout Submittals

As-Built Survey ; G

1.4 QUALITY CONTROL

The following requirements shall be the minimum acceptable performance requirements for the concrete floating breakwaters.

1.4.1 Manufacturer Qualifications

Manufacturer must supply documentation confirming 15 years of experience in the production of precast concrete floating breakwaters.

1.4.2 Concrete Floating Breakwater Loading

1.4.2.1 Wave Loading - Installed Position

AM005....deleted text....AM005 AM005....A....AM005 significant wave (Hs) =

5.6 feet with a maximum period of 3.2 seconds (100-year return period) AM005.... shall be used for the wave attenuation calculations....AM005 .

The 100-year return significant wave approaching the Main Attenuator at 64 degrees from perpendicular and the Entrance Attenuator at 30 degrees from perpendicular be attenuated to a significant wave height of 1 ft. or less directly behind the attenuators. AM005.... A significant wave (Hs)= 5.2 feet with a maximum period of 3.1 seconds (50-year return period) shall be used for the structural design of the concrete floating breakwater....AM005 The minimum design load from this wave shall be taken as AM005....510....AM005 pounds per linear foot (plf) AM005....deleted text....AM005 for the main breakwater and AM005....1,992....AM005 lb/lf for the entrance breakwater. This full load shall be used in combination with the transient mooring wind load indicated below. As a minimum, a multiplier of 1.67 shall be used to adjust wave height to H1/100 for all concrete floating breakwater internal structural design requirements.

Thus, a minimum wave height of 5.6 feet shall be used for general structural design requirements and a minimum wave height of 9.35 feet shall be used for hogging and sagging moments and related structural design requirements.

1.4.2.2 Loading - Construction Related Activities

The concrete floating breakwater design shall include provision for all construction related activities such as handling, transportation, and site deployment.

SECTION 01 91 41 Page 4

1.4.2.3 Transient Mooring Wind Loading

The concrete floating breakwater shall not be designed for transient mooring.

1.4.2.4 Extreme Wind Loading

The concrete floating breakwater shall be designed for winds blowing perpendicular to the length of the concrete floating breakwater of 123 mph for 3 seconds. Effects of icing may be disregarded as accumulation of ice shall be offset by a corresponding decrease in freeboard.

1.4.2.5 Vertical Live Load Capacity

The uniform live load capacity of the concrete floating breakwater shall not be less than 100 psf. Such loading shall be continuous over the entire deck surface, and alternatively to occur in any combination of unbalanced conditions. The concrete floating breakwater shall be designed to carry a 400-pound point load applied at any point on the breakwater.

1.4.3 Concrete Floating Breakwater Performance

1.4.3.1 Wave Transmission - Installed Position

The concrete floating breakwater shall limit the transmitted wave to no greater than 1 foot on the harbor side in the region of the marina behind the main breakwater as indicated on Drawing C-101 under all incident wave conditions indicated above.

1.4.3.2 Draft Restrictions

No known draft restrictions exist at the proposed breakwater locations.

1.4.4 Concrete Floating Breakwater Anchor Requirements

The design of the concrete floating breakwater shall accommodate concrete anchor blocks and chain. Minor variations shall be considered acceptable, however, a proposal for a concrete floating breakwater design requiring a major departure from the anchoring scheme shown shall not be accepted.

Flexible anchoring systems shall not be considered.

1.5 DESIGN REQUIREMENTS

The main concrete floating breakwater material shall be of post-tensioned concrete fully encapsulated by concrete wall construction with minimum wall thickness of 6 inches. All exposed embedded metal shall be stainless steel. The configuration shall be such as to provide a 960 foot long concrete floating breakwater, with a minimum of 1.6 feet of freeboard and a 140-foot long concrete floating breakwater at the harbor entrance with

1.6 foot of freeboard. The width and draft and details shall be sufficient to achieve a 1-foot attenuated wave transmission to the marina, as shown on Drawing C-101, under the design wave event. The entrance breakwater shall be of the same design as the main breakwater. The anchorage system is designed for a tidal range from MLLW to MHHW with wave loads as shown on Drawing G-003. The system will be capable of accommodating a range of water levels from EL 21.0 (ft MLLW) to El -5.5 (ft MLLW). Deviation from the width, depth, anchor and chain layout or any other design consideration shown in the contract documents shall be documented and incorporated into the contractor's shop drawings and

SECTION 01 91 41 Page 5 calculations. All design drawings and calculations shall be stamped by a State of Alaska registered professional engineer. While it is understood that some designs may be proprietary, full disclosure of all calculations required to fully demonstrate the performance and safety of the concrete floating breakwater for all listed environmental and loading conditions is required. Proprietary information will be protected and will not be made available to the public. Calculations shall be presented in a fully coordinated manner allowing a coastal engineer reviewer to readily understand and follow the calculations. Calculation packages submitted which require reviewers to perform parallel calculations to produce numbers or generate understanding shall not be considered acceptable.

Seismic design is not required for this project.

1.5.1 Precast Concrete Floating Breakwater Design and Anchorage Calculations and Drawings

Contractor shall submit stamped design calculations and design drawings of the Concrete Floating Breakwater for review and approval including anchoring system design calculations. Calculations shall demonstrate how the proposed design meets the requirements of the specification and achieves a 50 year design life.

Concrete for the precast concrete floating units shall conform to the requirements of Section 03 31 30 MARINE CONCRETE.

The Contractor is required to submit design life calculations showing this requirement is achieved with their design accounting for local conditions, concrete mix design, concrete cover, reinforcement material, admixtures, coatings, and anticipated degree of cracking. Acceptable software for design life modeling include:

a. Life-365, www.life-365.org

b. ConcreteWorks, www.txdot.gov/inside-txdot/division/information-technology/ engineering-software.html

c. Stadium, www.simcotechnologies.com/what-we-do/stadium-technology-portfolio

1.5.2 Construction Plan

Contractor shall submit a Construction Plan for review and approval. The Construction Plan shall demonstrate how the Contractor plans to execute the removal of the existing floating breakwater and anchoring system and install the new floating breakwater system while allowing marina operations and providing marina protection.

1.5.3 Shop Drawings

Contractor shall submit shop drawings for the Precast Concrete Breakwater for review and approval including the concrete units, the attachment system, the anchorage systems, the concrete embedment's, and the lifting inserts and devices.

1.6 DESIGN CRITERIA REFERENCES

All work shall be in accordance with the latest edition of the following

SECTION 01 91 41 Page 6 references and other applicable and pertinent codes as of the date of award of the contract. Referenced documents include additional references that are applicable to this project. The most stringent requirement shall govern when discrepancies occur, unless otherwise directed by the Contracting Officer.

UFC 1-300-02 , Unified Facilities Guide Specification Format Standard

UFC 3-201-01 , Civil Engineering

UFC 3-220-01 , Geotechnical Engineering

UFC 3-301-01 , Structural Engineering

UFC 4-150-06 , Military Harbors and Coastal Facilities

UFC 4-152-01 , Design: Piers and Wharves

Most current version of ACI 318, Building Code Requirements for Structural Concrete and Commentary

Most current version of AISC Steel Design Manual

Unified Facilities Criteria (UFC) are available at the following website: http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

1.7 QUALITY REQUIREMENTS

The concrete floating breakwater will be placed in service in a harsh marine environment at Bar Point Harbor in Ketchikan, Alaska. The corrosion typical of marine environments is present as well as a high number of annual freeze-thaw cycles. The materials selected for use in the concrete floating breakwater shall be such as to provide for a minimum 50-year service life with only minor maintenance. Minor maintenance is defined as maintenance required in the Operations and Maintenance Manual for wearing parts such as connections between concrete floating breakwater segments and connection to marine chains. Acceptance of alternate designs shall be dependent on providing documentation of similar structures, in similar environmental conditions, which have been in service for a time period approaching or exceeding 15 years, with a documented record of minor maintenance. Contractor proposed designs shall include a minimum of three references of owners or operators of facilities where similar concrete floating breakwaters, in similar environmental conditions, have been in service for a minimum of 15 years.

Multiple breakwater units are specified and shall be match-cast to ensure that they may be properly assembled and post-tensioned. If post-tensioning is not accomplished at the precast concrete plant, the precast plant shall be certified by the PCI Plant Certification Program for Category C1 work for casting of concrete floating breakwater modules.

PCI Plant quality control program records shall be available for review.

If multiple units are not post-tensioned at the precast concrete plant the assembly/post-tensioning plan shall be included as part of the professional engineer's stamped design drawings and calculations.

Contractor is required to demonstrate by test results or supporting calculations how the concrete floating breakwater articulation joints and chain connections have the durability to meet the design life requirement through the use of corrosion and fatigue resistant material selection, SECTION 01 91 41 Page 7 adequate reserve material to offset material loss or proper detailing and maintenance requirements as documented in the Operations and Maintenance Manual.

1.8 TURN OVER REQUIREMENTS

The concrete floating breakwater shall be turned over to the United States Army Corps of Engineers, Alaska District fully assembled and anchored in the correct location. Any field assembly shall be accomplished in compliance with EM 385-1-1 .

1.8.1 As-Built Survey

Contractor shall submit an As-Built Survey for review and approval. See Section 31 09 13.00 29 for the survey requirements. The As-Built Survey shall identify the center locations of all anchor blocks and the end points for each concrete floating breakwater unit. Sequence the survey data collection of the installed anchor blocks prior to final assembly/installation of the concrete floating breakwaters to ensure proper horizontal alignment as indicated in the drawings.

PART 2 PRODUCTS

2.1 CONCRETE

2.1.1 Concrete Durability Calculations

Contractor shall submit durability calculations for the Precast Concrete Floating Breakwater for review and approval. The durability calculations must meet a 50-year design life.

2.1.2 Concrete Reinforcement

Concrete reinforcement, cover, and mix admixtures shall be utilized to achieve a minimum design life of 50 years in the marine environment.

2.2 CONCRETE EMBEDMENTS

Concrete embedment's shall be stainless steel 316L or approved material.

Mild steel or painted mild steel embedment's will not be accepted.

2.3 STRESSING TENDONS AND ACCESSORIES

Concrete post-tensioning strands and accessories shall be designed to resist installation loads and environmental loads in the installed configuration.

2.4 ANCHORING SYSTEM

Anchoring system including concrete blocks with reinforcing bars, stud link anchor chain, and chain shackle shall be as shown in the contract drawings, unless the contractor’s concrete floating breakwater design is outside +/- 5 percent from the dimensions shown (length, width, freeboard,and draft).

2.5 CONCRETE FLOATING BREAKWATER OUTFITTING

Concrete floating breakwaters shall be outfitted with a rub rail on each side full length and at each end, and equivalent harbor lights and signage

SECTION 01 91 41 Page 8 supports as the existing facility including:

Day beacon: at the eastern end of the main breakwater.

Coordinate signage requirements with the U.S. Coast Guard.

PART 3 EXECUTION

Not used

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SECTION 01 91 41 Page 10