6923G521R0002A00002.pdf

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

1 3

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

6923G521R0002

9B. DATED (SEE ITEM 11)

10/02/2020

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

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

6923G521R0002A00002 10/16/2020

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

SLS Contracting Office 180 Andrews Street Massena, NY 13662, US

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 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 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.)

This amendment serves to include questions asked by prospective offerors and the answers provided by the Contracting Officer’s Representative.

1. Q: Is the SLSDC going to be installing the stop logs?

A: Yes.

2. Q: When was the last time the stop logs were installed, tested and the diffuser bay dewatered?

A: Winter 2019-2020 Continued on Pages 2 and 3 (Q &A)

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

6923G521R002A00002

(Questions and Answers)

1. Q: Is the SLSDC going to be installing the stop logs?

A: Yes.

2. Q: When was the last time the stop logs were installed, tested and the diffuser bay dewatered?

A: Winter 2019-2020

3. Q: Have you ever completely dewatered the diffuser bay? If so, do you know how much residual inflow we might need to manage? I.e. How many GPM will a dewatering system need to handle?

A: The residual incoming flow is highly dependent on temperature, precipitation and ice conditions that vary greatly year to year. In the past, on similar work, contractors have used one 6-inch and two-2-inch pumps, plus backup standby pumps, but since this is so dependent on weather and climatic conditions, SLS makes no specific recommendations for this project. The Contractor will need to use their own judgement.

4. Q: Have the walls of the diffuser bay area ever been inspected for cracking and/or infiltration of ground water? If so, what can you tell us about that?

A: The walls of the diffuser bay are outside the project area and their current condition will not affect the project scope.

5. Q: Are the existing dewatering pumps available for the contractor to use to dewater the majority of the diffuser bay or will the SLSDC perform this task?

A: SLSDC will install the stop logs and dewater to about elevation 151 feet IGLD85 SLSDC’s dewatering pit pumps cycle and allow variations in the water levels. Therefore, the Contractor will need to constantly manage water infiltration during any duration total dewatering is required.

6. Q: If the contractor is to perform the above task, we need to know if the pumps are electric, diesel, self-powered or otherwise? What size are the pumps? Total discharge dimension, GPM capacity?

A: See the response to Question #5.

7. Q: Please confirm the RFP is only for the Eisenhower lock located to the west of the channel.

A: Yes, this is Eisenhower Lock only.

8. Q: Could you identify what lands we could use for construction yard and lay-down areas. Can we have lands to the north AND south of the channel?

A: SLSDC will indicate laydown areas in the scoping document for the second phase of the solicitation. SLSDC believes there will be sufficient area in and around Eisenhower Lock.

9. Q: Do you have any hydraulic pressure data from the original diffuser design? Ie. What pressures are we designing for?

A: The design head for hydraulic structures of the SLS is 100 feet. The normal operating head is about 45 feet. The design flow is no less than 22,000,000 gallons in seven (7) minutes.

10. Q: Please confirm this is a replace-in-kind proposal. Ie. You are not looking for a new, revised diffuser design.

A: The design must replace the existing diffusers in kind in terms of functionality and hydraulic flow characteristics.

6923G521R002A00002

(Questions and Answers)

11. Q: Do you have any records of the lock gate over-topping?

A: During the winter work, the stoplogs are in place upstream of the upstream gates and downstream of the downstream gates and diffusers. The elevation of miter gate sills (much higher than the diffusers) is dewatered.

12. Q: Can we assume all upstream water will be controlled by SLSDC so there is no risk of that water entering the work area?

A: There will be some leakage through the stoplogs, that will depend on ice conditions. See 3, 5 & 6 above.

13. Q: Are any additional repairs and/or crack rehabilitation necessary to complete this contract?

Specifically, in the diffuser bay areas.

A: The contract is only to replace the diffuser laterals. No work on adjacent walls or surfaces unless it is a necessary part of the design to replace the diffusers.

14. Q: The scope of work requires the “design and construction in accordance with specifications”. Please direct us to the specifications you are referring to.

A: This is a two-phase design-build construction procurement. In Phase One, interested offerors shall submit proposals, demonstrating their capability to successfully execute the design-build construction contract resulting from this solicitation. The SLSDC will evaluate the Phase One submittals in accordance with the criteria described herein and select the most highly qualified offerors – no more than five – to compete for the design-build contract in Phase Two. In Phase Two, the selected most highly qualified offerors from Phase One shall submit technical and cost proposals. After the SLSDC has evaluated the Phase One submittals and SLSDC selects up to five of the most highly qualified offerors, they will be invited to compete for the design-build contract by completing the Phase Two submittals. A more detailed description of the design-build scope of work and requirements will be provided to the selected offerors in order for them to provide the required Phase Two technical and cost submittals.

15. Q: Would it be feasible to schedule preliminary investigation, studies, design and preparatory work in 2021, then install three diffusers in 2022, with an option to install an additional 3 in 2022?

A: The project schedules shall be as stated in the solicitation.

16. Q: Can we rely on the accuracy of the as-constructed drawings provided in the RFP?

A: As for any project, the as-build drawings are not a 100% guarantee that everything is precisely as shown on the drawings to the last fraction of an inch. They are a pretty good representation of what is in the field but for certain needs there is no substitute for field measurements and surveys. SLSDC will make available original as-built reinforcement and concrete contractor drawings showing the detail design and dimensions of the original diffusers. These are accurate to normal construction tolerances for this type of work.

17. Q: Can we assume the existing diffuser slab is sound and not required to be replaced? ie. This project does not require demolition and replacement of the base slab.

A: See answer to Question 13 above.