W911WN21B8000 Amendment 0001.pdf

W81ET410917016

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

RE: Secant Wall, Montgomery Locks & Dam, Beaver County, PA

The purpose of this amendment is to: 1) Provide responses to questions received; 2) Revise three (3) Sections of the Technical Specif ications; 3) Revise four (4) items in the Bid Schedule.

Details are specified in the Summary of Changes of this Amendment.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 4

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

16C. DATE SIGNED

BY 22-Apr-2021

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 W911WN21B8000

X 9B. DATED (SEE ITEM 11)

05-Apr-2021

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

22-Apr-2021

CODE

U.S. ARMY ENGINEER DISTRICT, PITTSBURGH

ATTN CELRP-CT

W S MOORHEAD FEDERAL BUILDING

1000 LIBERTY AVENUE ROOM 2203

PITTSBURGH PA 15222-4186

W911WN 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W911WN21B8000

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE (SF 30)

The following have been added by full text:

AMENDMENT 0001

Reference: Technical Specifications, Montgomery Locks and Dam, Secant Wall Construction, Attachment 1 to the Solicitation

The following specification sections have been revised and are attached to this amendment:

01 22 00.00 08 PRICE AND PAYMENT PROCEDURES

Paragraph 1.2.7 Field Office Trailer Section added to include payment for office trailer.

Paragraph 1.2.5.4 Payment Items Section edited to match bid schedule and provide clarification that post grouting is under apron.

01 35 00.00 08 SPECIAL PROCEDURES

Paragraph 1.9.6.1 Withdrawal of Equipment and Floating Plant

Section edited to remove option for contractor to moor barges at upstream river wall during high water event. Contractor must use contractor’s off-site mooring location during specified high water event.

01 52 13.00 08 GOVERNMENT FACILITIES

All Whole section added requiring contractor provide a field office trailer for the governments use.

SUBMITTAL REGISTER

Section 01 52 13.00 08 Add SD-01 Preconstruction Submittals New 10x32 Field Office Trailer.

Reference: Bid Schedule, Montgomery Locks and Dam, Secant Wall Construction

The following items have been revised:

0011 Drilling for Pre Grouting

Quantity changed from 15 LF to 30 LF.

0021 Verification Cores Grout Backfill

Quantity changed from 31 LF to 65 LF.

0023 Under Apron Post Grouting

Under Apron added to description to better clarify requirement.

0025 New Government Field Office Trailer

New Item added.

The following has been added by full text:

QUESTIONS AND ANSWERS (1-8):

A total of 8 questions were received on this project. Listed below are the questions and answers:

Q1: Reference Specification Section 31 63 41.00 14, Paragraph 1.7. Does the prime contractor need to meet the 5-years experience in secant pile installation, or can a subcontractor meet those requirements?

A1: The 5-year experience requirement can be fulfilled by a subcontractor on behalf of the prime contractor, or the prime contractor themselves, whichever single firm is most directly constructing the secant pile wall. A review of qualifications will occur post contract award to ensure overall compliance with the contract requirements, also stated in Specification section 31 63 41.00 14, paragraph 1.7 and 1.7.1.

Q2: The project documents call for jet grouting to be utilized to fill voids on either side of the secant pile wall.

Can the void filling be performed with other methods?

A2: The Secant Pile Wall contract requires various grouting methods throughout the project. The “Under Apron Pre/Post Grouting” is meant to fill the void space directly underneath the concrete apron and the top of soil and are separate bid items from Jet Grouting. The Jet Grouting intent is to mix the soil into a permanent soilcrete, vertically along the height of the secant piles from top of rock to bottom of apron, at either end of the Secant Pile Wall. This soilcrete shall have enough strength to form a composite barrier, in conjunction with the Secant Pile Wall and void grouting, that will prevent the escape of under-apron soil during future excavation and demolition landward of the barrier. If all requirements and intentions of Jet Grouting are met, alternative methods may be acceptable. Means and methods of alternative methods must be submitted in a “Work Plan” submittal described in specification section 03 37 06.00 08, paragraph 1.4.1 and will require Government approval.

Q3: Montgomery Dam Road leading into the site is very bad shape and is severely cracked with numerous potholes. Multiple contractors will be using the access roadway for delivery of materials such as concrete, large structural steel section, etc. This truck traffic may result is further damage to this roadway. Will the contractor under the Secant Wall contract be responsible for maintenance and repairs during construction and repaving of the access roadway upon completion of the secant pile contract?

A3: Assuming typical truck traffic and delivery of materials, a complete re-pavement of the road is not anticipated for this Secant Pile Wall contract and is not required be included in Contractor bids. If necessary, upon completion of the project, roadways shall be restored to their preconstruction condition. Refer to specification section 01 35

00.00 08, paragraph 1.6.2 and 1.6.2.1 for further detail on damages to existing roadways.

Q4: Once the Bulkhead System (flashboards) are installed to the top of the fixed crest dam, there may be debris flowing down the river that will build up against the bulkhead. Is the secant pile contractor responsible to remove or manage the debris that builds up upstream of the bulkhead?

A4: The Contractor will be responsible to manage debris so as not to impact any river traffic, river/Government operations, or impact secant pile wall construction during the length of the contract.

Q5: Are there existing mooring points on the Dam or pier? If not can mooring points be anchored into the dam?

A5: There are currently existing mooring points located on the Piers and new Contractor installed mooring points may be acceptable per Government approval. All temporary mooring actions shall be clearly detailed in applicable submittals as described in, but not limited to, specification section 01 35 00.00 08, paragraph 1.9, and preconstruction submittals, “Temporary Mooring Facilities”, “Plan of Action, Withdrawal of Equipment and Floating Plant”, and/or “Temporary Works Plan”.

Q6: The Concrete Field Demonstration Specification Section 3.2.4 for Demonstration Results indicates that the report shall be approved before further construction is permitted. Are 28 day concrete strength results and 90 day strength results required for this submittal? How long of a review period is the government anticipating taking to review the submittal before construction of the main Secant pile wall can begin?

A6: Refer to Specification 03 30 00.20 08 Section 3.2.1 for general requirements for sampling and testing of demonstration concrete. Evaluation of strength is to occur at 7 and 28 days unless the Contracting Officer or designated representative determines that additional testing at other strength intervals is required. The government review period for any field demonstration submittals would be equivalent to the allotted review period of any other submittal on the project.

Q7: Note 1 on plan sheet 40-SD101 requires the contractor to Restore the Apron that is demolished in order to install the secant pile wall. Please confirm that the Baffles do not need to be restored.

A7: Per this contract, the Contractor will not be required to replace baffles that have been demolished in order to construct the Secant Pile Wall.

Q8: Specification Section 03 30 00.20 requires the underwater concrete field demonstration placement for the cap beam, if the construction of a cap beam will be required. What is the beam along the secant pile wall? Is one required and if so, what are the details for the cap beam?

A8: The field demonstration secant pile wall shall use the same methods as approved for the final secant pile wall.

The Contractor shall restore the apron to the existing elevation regardless of the demolition / construction method chosen. The Contractor shall be required to design for and demonstrate underwater concrete placement to restore the profile of the existing apron prior to construction of the final secant pile wall.

(End of Summary of Changes)