Amendment 0006.pdf

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

Offers 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 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or electronic communication 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 letter or electronic communication, provided each letter or electronic communication 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 NUMBER AS DESCRIBED IN ITEM 14.

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

NUMBER IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, 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.)

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

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

16C. DATE SIGNED

Previous edition unusable STANDARD FORM 30 (REV. 11/2016) Prescribed by GSA FAR (48 CFR) 53.243

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

6. ISSUED BY CODE 7. ADMINISTERED BY (If other than Item 6) CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X) 9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

Section C - Description/Specifications/Statement of Work

The Requirements text has been modified to:

1. Based on the discussion at the site visit, it is our understanding that the goal of the project is to remove soft sediment and leave hard native material and/or debris, obstructions (commonly called high subgrade), such as rock, in place within the dredge area. Please confirm that high subgrade material can be left above design grade within the dredge area provided the contractor demonstrates/ documents the extent of the high subgrade material.

GOVERNMENT RESPONSE: Underlying hard material, as defined in specification Section 35 20 23 DREDGING AND DREDGED MATERIAL PLACEMENT, Subpart 1.2.4 Underlying Hard Material, may be left above design grade within the dredge area, provided that the contractor both demonstrates that material of that character exists at a given location and documents its extents.

Moorings shall be handled in accordance with specification Section 35 20 23 DREDGING AND DREDGED MATERIAL PLACEMENT, Subpart 1.10 Moorings. Debris and other types of obstructions shall be handled in accordance with specification Section 35 20 23 DREDGING AND DREDGED MATERIA PLACEMENT, Subpart 1.8.1.2 Debris in Material and Subpart 1.8.1.3 Debris Management.

2. Can unpumpable material i.e. rocks and boulders be side cast back into Goose Cove? If rocks and or boulders are removed from the water and are not allowed to be side cast, where should they be placed?

GOVERNMENT RESPONSE: Rock encountered during dredging that are not associated with a mooring or dock may be moved aside and left in place.

Moorings shall be handled in accordance with specification Section 35 20 23 DREDGING AND DREDGED MATERIAL PLACEMENT, Subpart 1.10 Moorings. Debris and other types of obstructions shall be handled in accordance with specification Section 35 20 23 DREDGING AND DREDGED MATERIAL PLACEMENT, Subpart 1.8.1.2 Debris in Material and Subpart 1.8.1.3 Debris Management.

3. Dredging is a lump sum bid item; will quantity adjustments for overrun and underrun be made after dredging based off of pre vs post dredge survey?

GOVERNMENT RESPONSE: See Amendment 0005, RFI #3.

4. Will the contractor be allowed to work 24 hours per day 7 days per week?

GOVERNMENT RESPONSE: Per specification Section 01 11 00 SUMMARY OF WORK, Subpart

1.10.1 Hours of Operations: Operational Hours: The Contractor will be allowed to perform work from 7:

00 AM to 7:00 PM each day, 7 days per week, including holidays, for the entire performance period of this contract.

5. Does stone debris encountered during dredging require removal and offsite disposal or can it be moved aside and be left in place?

GOVERNMENT RESPONSE: See response to #2 above.

6. Can the stone used in the road crossing for the pipe be removed and left on site for future EPA /USACE activities?

W912WJ25BA0050006

GOVERNMENT RESPONSE: The compacted gravel fill used as part of the hydraulic discharge pipeline protection, as shown on Detail K1 on Sheet C-501, may be removed and stockpiled within the contractor staging, storage, and water access area shown on Sheet G-002 and Sheet C-103. Compacted gravel fill may be left onsite.

7. Are the follow-up meetings (coordination and mutual understanding, H and S specific, QC specific) virtual/remote meetings?

GOVERNMENT RESPONSE: Meetings may be either in-person or virtual. The chosen medium will depend upon the nature of the topic(s) to be covered and will be left to the discretion of the Contracting Officer.

8. Please clarify the daily allowable volumes to be placed by the tremie.

GOVERNMENT RESPONSE: See Amendment 0004, RFI #12.

9. Please clarify if the contractor must stay between the minimum and maximums as it states cubic yards per hour.

GOVERNMENT RESPONSE: See Amendment 0004, RFI #12.

10. Please consider providing the contractors a maximum volume to be placed with the tremie per day.

Based on historical experience in contaminated, precision dredging and the conditions at the site, maintaining the minimum average per hour is not feasible.

GOVERNMENT RESPONSE: See Amendment 0004, RFI #12.

11. Please confirm how the Government envisions the contractor to measure real-time production as to not exceed daily established thresholds.

GOVERNMENT RESPONSE: See Amendment 0005, RFI #5.

12. If utilizing a hydraulic dredge, a turbidity curtain moon-pool around the dredge will be extremely prohibitive to production and movement. Please consider removing the turbidity curtain moon-pool for hydraulic dredges as the positive suction by nature generates far less turbidity than mechanical means.

GOVERNMENT RESPONSE: A turbidity curtain moonpool encompassing both the dredge plant and the current work area will not be required if the contractor elects to complete dredging hydraulically.

13. Is there an allowable tolerance for the elevation of the tremie pipe discharge which is currently called out a -30.5 MLLW?

GOVERNMENT RESPONSE: See Amendment 0003, RFI #3.

14. Is the contractor responsible for preventing public access to the discharge end of the hydraulic pipe on a continuous basis (24/7) or only when dredging and discharge operations are active?

GOVERNMENT RESPONSE: The contractor is responsible for preventing public access to the discharge end of the hydraulic pipeline on a continuous basis. Utilization of simple, reasonable means such as warning signage in the immediate area, will be considered acceptable.

15. The Tremie Placement Location as shown on Plan Sheet C-103 is called out with a specific coordinate location. At the site walk it was mentioned that the intent was to limit the placement to the bottom of the mine pit and prevent placement on the shallower sidewalls. Could you please clarify and provide a tolerance range for the location of the tremie pipe discharge end?

GOVERNMENT RESPONSE: See Amendment 0003, RFI #1.

16. Please clarify how the deduction for excess dredging will be applied given that the bid item for dredging is lump sum.

GOVERNMENT RESPONSE: See Amendment 0005, RFI #3.

KO CONTRACTING DIVISION, 696 VIRGINIA ROAD

CONCORD, MA 01742-2751

UNITED STATES

ELIZABETH GLASGOW, EMAIL: ELIZABETH.K.GLASGOW@USACE.ARMY.MIL TELEPHONE: 978-318-8671 AdminBy:

SCD: PAS: