Amendment0005.pdf

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

This amendment to the solicitation is issued to respond to Request for Information.

"The Government does not contemplate an extension to the bid opening date at this time.

1. CONTRACT ID CODE PAGE OF PAGES

1 3

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

16C. DATE SIGNED

BY 21-Dec-2017

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 W912WJ-18-B-0004

X 9B. DATED (SEE ITEM 11)

16-Nov-2017

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

21-Dec-2017

CODE

U S ARMY ENGR DISTRICT, NEW ENGLAND

696 VIRGINIA RD

CONCORD MA 01742-2751

W912WJ 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912WJ-18-B-0004

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

The following have been added by full text:

RFI 0005

The Bid Documents require that Ordinary and Hard materials be dredged to the specified dredge elevations unless Fast Rock is encountered above this elevation. Fast Rock is defined as rock having a seismic compressional wave velocity of 2,700 m/sec or greater. A number of the e4 test borings encountered and cored “sound rock” with high RQD values within the required depth of dredging. In comparison, Figures 45, 63 and 86 of the e4 report indicate that fast rock is always below the required dredge depths at the boring locations. We have the following questions:

1. From a practical standpoint, how will the Contractor and USACE determine in the field if Fast Rock has been encountered? Obviously, by looking at the rock, it is not possible to know if it has a seismic compression velocity of 2,700 m/sec. In addition, the limits of Fast Rock shown on the Bid Drawings will not be exact given the level of accuracy achievable by geophysical methods. How and by whom will the top of Fast Rock be positively identified in the field during dredging?

GOVERNMENT RESPONSE: Optional Item 0008 may be exercised in accordance with the terms of the contract documents for subsurface confirmatory borings. Please refer to specification section 35 20 23 subparts 1.6.1, 1.6.2 and 3.5.1 to understand how the Government has described the project site. Please refer to revised section 1.6.2 to understand how the Government has described the horizontal reach of subsurface conditions. As stated in the specification, local variations in the subsurface materials are to be expected and, if encountered, will not be considered materially different within the purview of the contract.

2. The possibility exists that rock will be encountered during dredging that has a seismic velocity significantly less than 2,700 m/sec but which is not feasible to effectively excavate using the mechanical dredging methods specified under this contract. Sound and fractured rock with seismic velocities less than 2,700 m/sec may require drilling and blasting to effectively remove the rock. For example, at boring FD14-22, the required dredging includes rock having RQDs of 68 (El. -45.6) and 88 (El.-49.1), yet Fast Rock is indicated in the e4 report to occur at around -58 MLLW, well below the dredge depth. If it not feasible to excavate rock classified as “Hard” dredging using mechanical methods despite the Contractor’s best efforts, how and by whom will this determination be made in the field?

W912WJ-18-B-0004

GOVERNMENT RESPONSE: Per Specification sections 01 11 00, paragraph two of 1.1 "Work Covered by Contract Documents", and 35 20 23, paragraph 3.5.1 "Dredge Equipment Requirements", the contractor is responsible for providing mechanical dredge(s) capable of removing the ordinary and hard material as defined in the specifications. No blasting shall be conducted as part of this contract.

(End of Summary of Changes)