Amendment 0002.pdf

W68SBV02115404

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

TITLE: Low er Monumental Navlock Monolith 15 Wall Repair Phase 2

The purpose of this amendment is to make changes to the Technical Specifications as listed in the Summary of Changes.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

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

16C. DATE SIGNED

BY 12-Oct-2010

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 W912EF-10-B-0015

X 9B. DATED (SEE ITEM 11)

17-Sep-2010

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

12-Oct-2010

CODE

USAED, WALLA WALLA - CONTRACTING DIV.

PHYLLIS L. BUERSTATTE

201 N. THIRD AVENUE

WALLA WALLA WA 99362-1876

W912EF 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EF-10-B-0015

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

AMENDMENT 0002

1. Bid opening remains unchanged at: 19 October 2010, 2:00 pm, local time.

2. Bidders must acknowledge receipt of this amendment. See Block No. 11 of Standard Form 30 for methods of acknowledging solicitation amendments.

3. The following changes are made to the technical specifications:

Technical Specification Section 03 82 15.10 28, subsection 3.3: new sentence has been added to item (3).

Technical Specification Section 03 82 15.10 28, subsection 3.4: This is a new section TEMPORARY AND SACRIFICIAL HARDWARE. The previous subsection 3.4 is now 3.5.

(End of Summary of Changes)

Lower Monumental Navlock Monolith 15 Wall Repair - Phase 2 W912EF-10-B-0015 amendment 0002

SECTION TABLE OF CONTENTS

DIVISION 03 - CONCRETE

SECTION 03 82 15.10 28

CONCRETE DRILLING AND ANCHORAGE

PART 1 GENERAL

1.1 REFERENCES

1.2 DRILLER QUALIFICATIONS

1.3 ROCK ANCHOR INSTALLER QUALIFICATIONS

1.4 SUBMITTALS

1.5 PROJECT/SITE CONDITIONS

1.6 USE OF ROCK ANCHOR SYSTEMS FOR FORMWORK

PART 2 PRODUCTS

2.1 NON-SHRINK GROUT

2.2 WATER

2.3 ROCK ANCHOR SYSTEM

2.4 BEARING PLATES

2.5 ANCHOR GROUT MATERIALS

PART 3 EXECUTION

3.1 DRILLING EQUIPMENT

3.2 WATER TREATMENT

3.3 ROCK ANCHOR INSTALLATION PROCEDURES AND SEQUENCE

3.4 TEMPORARY AND SACRIFICIAL HARDWARE

3.5 APPENDIX A

-- End of Section Table of Contents --

SECTION 03 82 15.10 28 Page 1

SECTION 03 82 15.10 28

CONCRETE DRILLING AND ANCHORAGE

PART 1 GENERAL

This section of the specifications covers the necessary qualifications, products, procedures, and sequence of drilling and anchorage for the prestressed rock anchor systems. Drilling and anchorage shall take place after satisfactory inspection of concrete removal by the Government.

1.1 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.

ASTM INTERNATIONAL (ASTM)

ASTM C 1107/C 1107M (2008) Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Nonshrink)

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2008) Safety and Health Requirements Manual

1.2 DRILLER QUALIFICATIONS

The Contractor shall use personnel experienced in horizontal core drilling and/or rotary hammer drilling to perform the work. The firm’s experience and the qualifications of personnel scheduled to perform the horizontal coring shall be a minimum of:

at least three horizontal coring projects successfully completed in the last five years. Include a brief description and reference for each project listed. On-site supervisors shall have at least two years experience in horizontal coring and drill operators shall have at least one year experience. Do not begin work on any horizontal coring until the qualifications have been approved. The Contracting Officer (CO) may suspend the horizontal coring if the Contractor substitutes unapproved personnel during construction. Submit requests for substitution of field personnel to the CO for approval. Additional costs resulting from the suspension of work will be the Contractor’s responsibility, and no adjustment in Contract Time resulting from the suspension of work will be allowed.

1.3 ROCK ANCHOR INSTALLER QUALIFICATIONS

Proof testing of anchors shall be directed by an individual with at least 3 years experience in post-tensioning and testing of soil and rock anchors.

Rock anchors manufacturer's representatives are acceptable provided that the individual has the required 3 years of experience. A resume detailing specific experience, specific projects, and references shall be included in the submittal for the Drilling and Anchorage Plan.

SECTION 03 82 15.10 28 Page 2

1.4 SUBMITTALS

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

submittals not having a "G" designation are for for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Drilling and Anchorage Plan; G, GT

Submit the procedures proposed for the accomplishment of the horizontal drilling and installation of rock anchor systems. The procedures shall include a detailed description of the methods and equipment to be used for each operation, and the sequence of operations in accordance with EM 385-1-1. The plan shall contain qualifications for driller(s), rock anchor installer(s), and a form used for recording results of rock anchor proof testing. The plan shall also include an access plan for personnel and the procedures for drilling that take water fluctuation into account.

Submit in the plan the qualifications of the firm, on-site supervisor, and driller.

SD-03 Product Data

Non-Shrink Grout ; G, GT

Details and data on the non-shrink grout shall be submitted for conformance.

1.5 PROJECT/SITE CONDITIONS

Suggested methods to access the work area include a climbing scaffold, crane and man basket, or a raisable work platform. The Contractor's proposed access scheme shall be included with the drilling and anchorage plan for approval. The access scheme is to include any scaffolding, ladder, stairway or other access schemes including type, layout, and connections. Scaffolding and access shall comply with EM 385-1-1. The Contracting Officer's approval shall not be considered to relieve the Contractor of any responsibility for compliance with the contract and applicable Federal and State laws. The Contractor shall provide access to the work area in the lock chamber for Government personnel at all times.

Operation of the navigation lock is described in Section 01 11 01.00 28.

1.6 USE OF ROCK ANCHOR SYSTEMS FOR FORMWORK

Prestressed rock anchor systems may be used temporarily for anchorage of formwork during placement of concrete. Rock anchor systems must be protected from nicks, gouges, or other damage during placement of reinforcement and setting of formwork. Sleeve material used for protection of anchors shall be a minimum of 3.5 inches in diameter and the rock anchors must be centered in the sleeve.

PART 2 PRODUCTS

2.1 NON-SHRINK GROUT

Non-shrink grout for weep holes and anchor knockouts shall be a

SECTION 03 82 15.10 28 Page 3 commercially available prepackaged product. The use of metallic iron in the grout will not be acceptable. Prepackaged non-shrink grout may be either a gas-liberating or expansive-cement type of material needing only the addition of water and consisting of a commercial formulation suitable for the application proposed and meeting all requirements of ASTM C 1107/C 1107M.

2.2 WATER

The water used in the grout and for drilling operations shall be furnished by the Contractor. It shall be fresh, clean and free from injurious amounts of sewage, oil, acid, alkali, salts, or organic matter.

2.3 ROCK ANCHOR SYSTEM

The rock anchor system shall be solid all-thread bar prestressing steel conforming to ASTM A 722. Attached to the end of each rod shall be a threaded expansion core and expansion shell to anchor the rod in the drilled hole. The anchor shall be a "long-shell" expansion type anchor with a flanged end cone. Each rod shall be provided with a hardened washer, a heavy-duty hex nut, and with a lock nut. The anchor rods shall be minimum 1- 7/8 inch nominal diameter with an ultimate tensile strength of 150 ksi.

2.4 BEARING PLATES

Anchor bearing plates shall be ASTM A 36 mild steel plate material.

Bearing plates shall have dimensions as shown on the contract drawings.

2.5 ANCHOR GROUT MATERIALS

A commercially available cementitious or epoxy-based grout shall be used to fully encase the anchor rods and expansion shells after installation. Grout mixtures shall attain a minimum compressive strength of 5,000 psi.

PART 3 EXECUTION

3.1 DRILLING EQUIPMENT

Equipment to be furnished by the Contractor shall include core-drilling and/or rotary-hammer drilling machinery of a type required for cores of the required length and a minimum of 3.5 inches in diameter and a maximum of

3.75 inches in diameter. The Contractor shall ensure that equipment is sufficient to provide proper hole alignment and hole diameter as shown on the Contract drawings. Supplies for drilling to be furnished by the Contractor shall include, but not be limited to, all drill rods, core barrels, coring bits, piping, pumps, water, tools, and power required for drilling and all boxes and containers required for core samples. Selection of the type of bit shall be at the Contractor's discretion provided that the selected bit has sufficient drilling capability and production.

3.2 WATER TREATMENT

All water used for drilling operations shall be collected and treated as described in Section 03 01 40.71 28 CONCRETE REMOVAL in the paragraph titled "Water Treatment." All particulates shall be disposed off-site by the Contractor.

SECTION 03 82 15.10 28 Page 4

3.3 ROCK ANCHOR INSTALLATION PROCEDURES AND SEQUENCE

The manufacturer's instructions shall be strictly followed for installation of rock anchor systems including proper equipment, drilling holes, setting the expansion shell, tensioning the anchor rods, and grouting the anchors.

Anchors holes shall be drilled and anchor rods and expansion shells shall be proof-tested prior to use for formwork or placement of concrete. The following procedures shall be used for drilling holes, installation of anchors, prestressing anchors, and grouting anchor holes.

(1) Holes for anchors shall be rotary-hammer or core-drilled with a minimum hole diameter of 3.5 inches. Reinforcing steel and miscellaneous or tramp steel may be encountered during drilling operations. Hole alignment shall be such that the end of the drill hole does not vary more than 4 inches in any direction from center of the hole as shown on the Contract drawings.

(2) A rock anchor shall be installed in the hole and the anchor expansion shell expanded by torquing nut or test jack. The anchor shall be proof tested and results submitted in accordance with the requirements of Appendix A of this specification. After proof testing is complete, nuts, washers, and bearing plates shall be removed prior to final tensioning and lift-off testing.

(3) Final tensioning and lock-off of anchors shall not commence until concrete has achieved a minimum strength of 2500 pounds per square inch.

Tension in the anchors immediately after lock off shall not be greater than 225,000 pounds or less than 215,000 pounds. Tension shall be verified with a lift off test.

(4) After lock off, grout the anchors solid by pumping grout through a tube as shown on the contract drawings. Pump grout until grout is forced out of a bleed (vent) hole drilled in the base plate. Continue pumping until consistency of grout exiting bleed hole is consistent.

(5) After grouting of anchor hole is complete, grout anchor knockout solid with non-shrink grout. Prior to grouting, knockout shall be cleaned and prepared in accordance with the requirements of Section 03 30 00.00 28 CAST-IN-PLACE CONCRETE Construction Joints.

3.4 TEMPORARY AND SACRIFICIAL HARDWARE

Temporary anchors and sacrificial hardware located within the repair area of monolith 15 may remain in place for convenience. Any temporary and/or sacrificial items shall be securely bonded or fastened in place before placement of concrete. Temporary and/or sacrificial items shall not be less than 6 inches from permanent prestressed anchors. All items shall have at least 6 inches of clear cover to the finished face or any adjacent construction or expansion joint. Temporary items placed outside the repair area of monolith 15 must be completely removed and the void repaired with non-shrink grout per para 2.1 of this section.

3.5 APPENDIX A

Appendix A follows

SECTION 03 82 15.10 28 Page 5

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