W912P417B0006-00001.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 provides answ ers to questions that w ere received. This amendment also provides a page change to draw ing sheet C-102 as a result of one of the answ ers provided.

The response date and time is not extended. Responses to this solicitation are due by 12:00PM local time 12 Sep 2017.

1. CONTRACT ID CODE PAGE OF PAGES

1 3

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

16C. DATE SIGNED

BY

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 W912P417B0006

X 9B. DATED (SEE ITEM 11)

04-Aug-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.

00001

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

6. ISSUED BY

3. EFFECTIVE DATE

29-Aug-2017 CODE 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912P417B0006

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:

QUESTIONS ANSWERS

Subject: Response to Bidder Questions, Lorain Outer Breakwater Rehabilitation, Lorain Harbor, OH

1. Question: Would the government consider performing the test in actual cell rather than on shore.

Confirmation coring and video logging of the holes can be performed to verify results. This has an advantage of consolidating a cell with permanent value and reduces the effort necessary.

Response: Government will not consider performing the test/demonstration in an actual cell. The existing steel piles are known to be corroded and cracked in some locations. The exact composition of the cell fill is not known at this time. Testing is needed to determine grout spread within the cell fill material. Depending on grout type chosen pressures to pump the grout could vary considerably. Government does not want to risk damaging one of the existing cell to determine the best way to rehabilitate another. Repair or removal of a damaged cell due to the testing/demonstration operation would be costly. It seems unreasonable for the Government to require this risk to be borne by the contractor.

2. Question: The test cell acceptance criteria is not defined and it is the contractors risk if another test must be performed. Please define the maximum increase in stress on the sheet piles is allowed and what criteria will be used to determine acceptance of the grouted stone.

Response: Maximum increase in stress on the piles is to be determined as part of the grouting plan; see part 1 GENERAL of section 03 37 00. The end result of the grouting is to create a self-supporting mass structure within the sheet pile cellular wall. The demonstration should result in a mass structure that stands upright under its own weight without support from the piles or pipe used as the form to contain the grout.

3. Question: Consider changing the pay item to Each for the test cell work. This is experimental work. The work plan will be prepared with input and approval from the Government and the determination of the success of the test is subjective. Performing a second test will have significant costs to retrieve the stone from the breakwater, build the test cell and perform the test.

Response: Will not change pay item to Each. Paragraph 1.3.5.1 of section 03 37 00 includes the sentence “Samples of the aggregate may be obtained by the contractor for the purpose of testing grout mixes and grouting techniques.” Enough material should be retrieved from the breakwater to allow the contractor to do any necessary testing and trials prior to performing the required demonstration.

4. Question: Please consider adding individual pay items for each component of work. Attached is the pay schedule for similar work performed by the USACE with pay items for the different items of work and each grout mix. Suggest pay items be added in the base bid for- Drilling (LF), Flowable fill (CY), Grout (CF), Verification Coring (LF). Suggest added pay items for Option A would include Drilling (LF), Grout (CF), Verification Coring (LF).

Response: Will not add pay items. Number of drill holes, length of each hole, and grout volume (grout material may be expansive or not) could be highly variable based on the grout material/mix selected by the contractor.

W912P417B0006

5. Question: Section 1.3.6 requires grout mixes to “completely fill the voids.” This is not a realistic expectation as the gradation of the existing stone fill is a variable there is likely some infilling of the groutable voids with sand and silt. I was unable to find defined acceptance criteria in the Chicago Breakwater specifications. Please consider a defining the acceptance of the work to allow for variability in the aggregate fill.

Response: The end result of the grouting is to create a self-supporting mass structure within the sheet pile cellular wall. The grouted cell fill should result in a mass structure that stands upright under its own weight without support from the existing piles. Paragraph 1.3.5.1 of section 03 37 00 describes the cell fill as “crushed stone, crushed gravel, and/or clean run-of-bank material of 3 inch maximum size and reasonably well graded”. Grout material should be selected based on this description.

6. Question: Please provide the specification for the concrete and reinforcement to be placed in arc between cells 40 and 41. Sheet C-102, note on bottom left side of drawing (Nothing noted in specifications).

Response: Note 6 is added to sheet C-102: “Concrete is to achieve min. 3000 psi compressive strength at 28 days, include air entrainment with air content between 4.5% and 7.5% and include additives as needed to allow placement at the detached breakwater. No reinforcement is required.”

A page change is provided to replace sheet C-102.

7. Question: Have samples of the aggregate cell fill been obtained by the USACE? If so, was any gradation testing performed on these samples and can this information be provided to the Contractors? We are interested in the lower end of the gradation (the amount of fines content). This information is need to evaluate the potential grout material types and grout quantities for the project. If samples are available, will the Contractor be allowed to perform his own testing on these samples prior to the bid date?

Response: USACE has not obtained representative samples of the cell fill.

(End of Summary of Changes)

A1

C-302

C-301

AND 4 TEES, TYP.

112 S-28 PILES

CIRCULAR CELL,

14 S-28 PILES, TYP.

CONNECTING ARC,

LAKE ERIE

LORAIN HARBOR

CENTERLINE OF BREAKWATER

CENTER OF CELL, TYP.

WITH GRAB BARS

ACCESS LADDER

5' 0 5'

SCALE: 1''= 5'-0"

SCALE: 1''= 5'-0"

90°

90°

90°

49'-7 1/2" +/-

WITH KNOWN CRACKS ARE SHOWN ON SHEET C-101

AND FURTHER AWAY FROM THE T-PILES, CELLS

CRACKS HAVE BEEN OBSERVED BOTH CLOSER

USUALLY 4-6 SHEETS FROM T-PILES, THOUGH

APPROX. LOCATION OF OBSERVED CRACKS,

CONCRETE IS TO MATCH EXISTING PILE ELEVATIONS

PLACE 2' OF CONCRETE OVER NEW STONE, TOP EL OF

REPLACE FILL WITH ODOT ITEM 703.01 SIZE NO.2 AGGREGATE,

GROUTING PLAN AS DETERMINED BY THE CONTRACTOR,

NEEDED TO DEVELOP OR TEST THE CONTRACTOR'S

SPEC SECTION 03 37 00 AND FOR ANY FURTHER TESTING

FILL TO COMPLETE THE DEMONSTRATION REQUIRED BY

NOT TO DAMAGE THE EXISTING PILES, RETRIEVE ENOUGH

RETRIEVE CELL FILL FROM WITHIN THESE ARCS, TAKE CARE

REMOVE ENTIRE CAP FOR CLOSURE ARCS BETWEEN CELLS 40 AND 41,

TYPICAL EXISTING CELL LAYOUT PLAN

FOR LIGHT LOCATIONS

SEE PLAN ON C-101

CENTER OF SOME CELLS,

WERE INSTALLED AT

NAVIGATION LIGHTS

REINFORCEMENT IS REQUIRED.

AS NEEDED TO ALLOW PLACEMENT AT THE DETACHED BREAKWATER. NO

AIR ENTRAINMENT WITH AIR CONTENT BETWEEN 4.5% & 7.5% AND INCLUDE ADDITIVES

CONCRETE IS TO ACHIEVE MIN. 3000 PSI COMPRESSIVE STRENGTH AT 28 DAYS, INCLUDE6.

CRACKS IN THE SHEET PILE.

CONSISTED OF INSTALLING MULTIPLE STEEL BANDS TO SPAN ACROSS EXISTING

CELL NO. 2, 10, 15, 16, 20, 21 AND 24 WERE REPAIRED, AS IDENTIFIED ON C-101. REPAIR

DESIGN DRAWINGS OF THESE REPAIRS ARE ATTACHED TO THE CONTRACT SPECS.

A NUMBER OF SHEET PILE REPAIRS WERE COMPLETED IN THE SPRING OF 2017.5.

WITHIN THE CONCRETE CAPS.

INSPECTION HOLES ARE 2" DIA. STEEL PIPES WELDED TO THE PILES AND EMBEDDED4.

CELLS IS VISIBLE. SOME OF THE FILLING HOLES ARE COVERED WITH CONCRETE CAPS.

MOST OF THE 10" DIA. FILLING HOLES ARE OPEN AND FILL MATERIAL WITHIN THE3.

PLAN ON SHEET G-002.

POWERED SUBMARINE CABLES ARE IN THE VICINITY OF THE WORK, SEE GENERAL

THE BREAKWATER IS WRAPPED WITH STONE PROTECTION, NOT SHOWN THIS SHEET.2.

OF THE ORIGINAL CONTRACT DRAWINGS USED TO CONSTRUCT THE BREAKWATER.

SEE REFERENCE DRAWINGS 40-B-59/2 AND 40-B-59/3. THESE DRAWINGS ARE COPIES1.

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