Amendment 0006.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

SOLICITATION NO. N40085-23-R-2516: Relocate Underw ater Electromagnetic Measurement System, Naval Submarine Base New London, New London, CT.

Contract POC: Leslie Moore, Email: leslie.c.moore11.civ@us.navy.mil

See Continuation Page(s)

1. CONTRACT ID CODE PAGE OF PAGES

J 1 15

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

16C. DATE SIGNED

BY 24-Mar-2023

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 N4008523R2516

X 9B. DATED (SEE ITEM 11)

08-Feb-2023

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

24-Mar-2023

CODE

NAVFACSYSCOM MID-ATLANTIC

CONTRACTING CORE

9324 VIRGINIA AVENUE

NORFOLK VA 23511-3095

N40085 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

N4008523R2516

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 0006

This Amendment 0006 is issued to incorporate the following:

1. Update Instructions to Offerors (changes denoted in red below)

2. Continuation sheet to update drawings/specifications

3. Provide responses to Pre-Proposal Inquiries (PPIs)

4. Provide pictures from the Range House (attached separately)

1. INSTRUCTIONS TO OFFERORS (changes denoted in red)

3. EVALUATION FACTORS FOR AWARD

(1) Factor 1 – Recent, Relevant Experience of the Firm (Corporate Experience)

(i) Solicitation Submittal Requirements

From:

Submit a minimum of two (2) up to a maximum of five (5) relevant construction projects your firm has performed (similar in size, scope and complexity to RFP). Offeror must collectively demonstrate experience with two types of projects: At least 1 New Construction of In-Water Steel Structures and at least 1 electrical/telecommunications project, all meeting the size, scope/complexity requirements described below. The Offeror1 may submit experience demonstrated when it performed as a subcontractor.

Additionally, the Offeror may submit the experience of a proposed subcontractor intended to perform under this contract as long as the submitted project meets the size/scope/complexity requirements, the proposal clearly identifies the meaningful involvement of the proposed subcontractor in the performance of this contract, and a signed letter of commitment between the offeror and subcontractor is provided. Recent projects are defined as having been 100% completed within the last fifteen (15) years prior to the submission due date.

To:

Submit a minimum of two (2) up to a maximum of five (5) relevant construction projects your firm has performed (similar in size, scope and complexity to RFP). Offeror must collectively demonstrate experience with two types of projects: At least 1 New Construction of In-Water Steel Structures and at least 1 electrical/telecommunications project, all meeting the size, scope/complexity requirements described below. The Offeror1 may submit experience demonstrated when it performed as a subcontractor.

Additionally, the Offeror may submit the experience of a proposed subcontractor intended to perform under this contract as long as the submitted project meets the size/scope/complexity requirements, the proposal clearly identifies the meaningful involvement of the proposed subcontractor in the performance of this contract, and a signed letter of commitment between the offeror and subcontractor is provided. Recent projects are defined as having been 100% completed within the last fifteen (15) years from the date of issuance of this RFP.

3. EVALUATION FACTORS FOR AWARD

(2) Factor 2 – Management Approach and Schedule

(i) Solicitation Submittal Requirements

From:

The schedule shall be based on a contract award date of June 15, 2023. This date is for proposal purposes only and is not intended to indicate an anticipated/planned award date.

To:

The schedule shall be based on a contract award date of June 27, 2023. This date is for proposal purposes only and is not intended to indicate an anticipated/planned award date.

4. PROPOSAL REQUIREMENTS

4.3 PRE-PROPOSAL INQUIRIES (PPIs)

From:

All inquiries must be submitted in writing and received by the Contract Specialist no later than seven (7) days prior to the proposal due date in order to permit adequate time to reply to the inquiry. There is no guarantee that PPI’s submitted after the cut-off date will be answered before the solicitation closes. Submit all questions to Leslie.c.moore11.civ@us.navy.mil. Use of the PPI Log template is required. The PPI Log Template (Attachment A) can be found on the Contract Opportunities website under the Attachments section.

To:

All inquiries must be submitted in writing and received by the Contract Specialist no later than 24 March 2023 in order to permit adequate time to reply to the inquiry. There is no guarantee that PPI’s submitted after the cut-off date will be answered before the solicitation closes. Submit all questions to Leslie.c.moore11.civ@us.navy.mil. Use of the PPI Log template is required. The PPI Log Template (Attachment A) can be found on the Contract Opportunities website under the Attachments section.

2. CONTINUATION SHEET

Drawing Revisions

The following drawings are to be revised as noted and accompany this Design Revision:

NAVFAC Dwg. No.: G-002 Title: Drawing Index and General Notes Action: Work restrictions: delete #1 & #4

Specification Revisions

DIVISION 01 – GENERAL REQUIREMENTS

SECTION 01 33 00 SUBMITTAL PROCEDURES

Section 1.10, Scheduling: Add the following to the end:

f. The following material/equipment submittals are considered critical to the successful completion of the project due to procurement timeframes, and must be submitted by the contractor within 15 days of contract award:

(1) Cable

(2) MV Transformers

(3) Steel

(4) MV Disconnect Switch

3. Responses to Pre-Proposal Inquiries (PPIs)

Question No.

Reference Question Government Response

Page Section Para.

42 Spec 05 12 00

AWS D1.1

Para 3.7.1.2 Specification 05 12 00 Paragraph

3.7.1.2 references table 6.2 of AWS D1.1 (2015) for acceptance criteria for Ultrasonic Testing of CJP groove welds which we do not believe is intended for tubular connections. Clause 9.27.1 specifically prohibits the application of amplitude based acceptance criteria (per Table 6.2/6.3) to T-,Y-,K-connections. Clause 9.27.1.1 may provide more suitable acceptance criteria. Please confirm the acceptance criteria for Ultrasonic Testing of CJP groove welds in Tubular Structures.

Per AWS-D1.1, follow requirements as set forth in 9.26.2

43 Spec 05 12 00

AWS D1.1

Para 3.7.1.2 Specification 05 12 00 Paragraph

3.7.1.2 requires compliance with ANSI/ASNT CP 189 for the qualification of NDT technicians.

Please confirm whether the additional qualification requirements of AWS D1.1 Clause

9.30.2 are required to be observed.

CP 189 establishes the minimum requirements for the qualification and certification of NDT and PdM personnel. The standard requires that any unique or additional requirements in the certification procedure be incorporated. This will include the AWS requirements related to tubular sections.

44 Spec 05 12 00

AWS D1.1

Para 3.7.1.2 Specification 05 12 00 paragraph

3.7.1.2 provides a testing frequency of 50% Ultrasonic testing for CJP groove welds. Please confirm whether this supersedes the 100% Radiographic or Ultrasonic testing specified in Clause 9.26.2 of AWS D1.1. for CJP groove butt joints welded from one side without backing.

Per AWS-D1.1, follow requirements as set forth in 9.26.2

45 AWS D1.1 For T-Y-K connection welds in the tower foundation will NDE "known-defect" mock-ups be required for each combination of main and branch line joints?

Per AWS-D1.1, follow requirements as set forth in

9.15.4.1 and 9.30.2

46 Spec 09 97 13.26

Para 1.4.5.7 Spec 09 97 13.26, para 1.4.5.7 indicates field coating to be performed by contract certified to SSPC QS1 requirements. Does this

Yes, all field coating requirement also apply to field application of touch-up coatings, eg, field welds, handling damage, etc?

47 S-501 Various Does the 6-5/8"xsch40 pipe serving as submarine cable conduit on the side to the tower to be coated in accordance with the same system at the tower structure and only on the exterior of the pipe?

The pipe shall be fully galvanized, interior and exterior, and coated on the exterior and first 6" of the interior on both ends to match the rest of the strcuture.

See response to #56 for information on coating over galvanizing.

48 Drawing S-

We have not been able to locate a specification for the anodes (4ea) that get welded to the guide structure. Can you confirm the material properties/composition of the anode?

Aluminum Anodes shall specificized in accordance with MIL-DTL-24779D(SH) 16 March 2015

49 Drawing S-

Drawing calls out 14 gauge corrugated metal decking, however there are no other specifics provided and we have not been able to locate anything in the specifications for this. Can you provide further clarification as to what is required. There are numerous types of 14 gauge corrugated metal decking.

The 14 gauge metal decking is there to assist the contractor in stabilizing the rigid frame prior to pile driving.

50 Solicitation Please confirm this contract is tax exempt.

Please be advised the Department of the Navy does not fill out proffered tax exempt forms nor does it provide a tax exempt number for your use in securing the necessary tax exemptions from your state because only the state revenue office has the legal cognizance and the authority to render an opinion regarding the propriety of such a tax exemption

52 11 of 75 Solicitation The Solicitation states, "The schedule shall be based on a contract award date of June 15, 2023." The Milestone 1 completion date of the new tower is 6/24/2024.

The difference between these dates is 375 calendar days. The contract documents state the base contract duration is 394 days from award.

Please clarify so the summary level

June 15, 2023 will be changed to June 27, 2023.

Please see Continuation Page in Amendment 0006.

The Milestone 1 completion date of 6/24/2024 for the new tower is correct. There are extra days in the contract that are for administrative closeout activities.

project schedule can be developed accordingly.

53 Drawing C-

Detail B5 The drawing shows a 10ft wide mattress. Is there a reason why 10ft was selected over 8ft wide? All of the mattress suppliers produce 8FT wide mattresses as a standard. Is it possible to reduce the width requirement to 8ft? There are numerous benefits including economical benefits.

Yes, reducing the width to 8 feet is acceptable, as long as the mat is still stable at the top of the slope.

54 Amendment

Question No. 3 Referencing the reply to Question 3, Amendment 2, please confirm that when the reply is that no Test piles are required, this means that PDA testing of piles is not required.

The contractor is still required to confirm that the piles have met the specified capacities.

55 Plan Sheet G-

Plan Sheet C-

Specification 01 14 00

Work Restrictions

Notes para 1.2.1

"Work Restrictions on plan sheet G-002 discusses several access limitations, eg, security clearance, transportation of contractor's material and personnel, vessel launching, storage, transport of government personnel, etc. There are also several references to ""limits of work"" in these notes and elsewhere in specs (eg, Plan Sheet G-002 Note 4/Work Restrictions and Spec 01 14 00, para 1.2.1), but no limits actually delineated on plan sheet C-101 or elsewhere that we have found.

Please clarify if there will be space provided landside for contractor's temporary office trailer, administrative field offices, personnel parking, material receiving, vessel docking for contractor and government employee movement to the site, etc.

where that space is located, and what size is it. "

The government does not place any work restrictions on the contractors personnel.

#1 and #4 of the Work restrictions on G-002 will be deleted. See continuation page.

Please see Amendment 0005 for answers to #15, 16, and #34 regarding land side space.

56 Specification:

05 52 00

05 51 33

09 97 13.26 para 2.2.5.1 para 2.2.4

Specification 05 52 00, para 2.2.5.1 indicates handrail to be Galvanized and Painted. Specification 05 51 33, para 2.2.4 indicates ladders are to be painted in accordance with Spec 09 97 13.26 (zinc/coal tar/coal tar). Since coal tar on ladders seems unusual, we are asking if ladders and ships ladders to be painted like structural steel or are they also to be galvanized or galvanized and painted? Please

The higher wear areas such as handrails and ladders must be galvanized and coated. For this we would require:

Require SSPC-SP16 Brush- Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals Substitute Corothane I Galvapac 1K with Zinc Clad provide paint requirement for paint system to be applied over galvanizing.

5 @ 3.0 to 4.0 mils DFT or equivalent substitution for other manufacturers.

58 Page 12 26 20 00 2.11 Composite

Cable

We have approached Rochester Cable for pricing of the primary and spare cables for the project and have been informed by the supplier that technical data pertaining to the cable and more specifically the reel / spool dimensions, they are not at liberty to discuss. The reel / spool would be considered a component part of the order and required information for proper installation.

We will need to have this dimensional information to fabricate a structurally sound means of deploying the cable. Is there any way to disseminate this information in an addendum, or give the supplier permission to provide us with the requested dimensions?

Reel Information:

-- Weights and Dimensions -- 23,000 lbs.

-- 115 x 72 x 115 -- Includes lagging -- No frame

Please see the Reel Drawing attachment.

59 Are we allowed to use sub-contractors as part of our technical submittal?

Bid per the RFP - Factor 1 and Solicitation Submittal Requirements.

60 Will Navy make available a bulkhead for loading/unloading?

And a laydown area?

There isn’t any space or location set aside for a contractor field office. It is presumed, but not required, that the contractor will have an office on a barge at the work site.

There is no requirement to provide an office for government use during the contract.

61 Do we have to submit Standard Form 24 with our Bid Bond?

Yes.

62 2 31 62 16.13 1.4.2 There are two driving criteria that need to be met: 1. Minimum tip El.

-98 and ultimate capacity of 230 kips.

The wave equation analysis shows that the minimum tip is the governing criteria. While trying to achieve the minimum tip the 20”x.5” wall (A252 gr3, 45ksi) pile is overstressed. We suggest either increase the wall thickness for the 20” pile to .625” wall that meets specifications.

If this is the case we would recommend increasing the wall thickness to 0.625" to meet the requirements

63 Attachment H The Connecticut Department of Energy & Environmental Protection

The letter from CT DEEP states that "authorized work letter in Attachment H authorized installation of the new cable via jet-plow to take place within the Feb 1 through Sept 30th seasonal time of year restriction on in-water work.

Please clarify whether or not pile installation and removals are allowed within the aforementioned time of year restriction as well.

can occur within the aforementioned time of year restriction..." The authorized activities are listed in the State permit for the UEMMS relocation project (Water Quality Certificate & Federal Consistency Concurrence

#202007889-WQC &

#202007200-FCC) and include pile installation and removal.

64 Page 8 of

Solicitation Document

(b) Proposal delivery requires the Electronic Submission marked as "Original" and the hard copy marked as "Copy". Please confirm that in this case, the original ink signed proposal forms would not need to be submitted considering the Electronic Copy would be a scanned copy and the mailed version is a "Copy".

FAR Clause 52.236-28 on page 22 of 25 refences "manually signed".

Would the mailed copy be an "Original" if it is to contain the original signatures? Should the mailed copy include the original signatures? Please clarify.

1. Confirmed, please bid per the RFP

2. No, the mailed submission would be a copy that contains original signatures

65 Page 16 Specification 01 57 19

1.8 Reference Specification Section 01

57 19, Paragraph 1.8. It is our experience on similar projects that this paragraph is utilized to delineate which permits have been obtained or will be obtained by the Government. Such information is not included in this contract and the specification, as written, appears to indicate that the Contractor is responsible to obtain all permits necessary to construct the project.

Please confirm which permits (if any) have been obtained, or will be obtained by the Government.

The Government has obtained the following permits:

- a Water Quality Certificate & Federal Consistency Concurrence from the State of Connecticut (#202007889-

WQC & #202007200-FCC);

and

- a Section 408 Authorization from the USACE (NAE- 2020-02336).

66 Can some pictures of the inside of the range house be provided showing inside the building where the conduits come up through the floor. We’d like to see the area available for pulling the cables up the conduit and how to route our pull-in cable through the building.

Please see uploaded pictures

67 C-301 The New Work Drawing C-301 shows the articulating concrete block mat at 10ft wide.

Commercially available mats are typically 8ft wide for trucking purposes. Can the mats be 8ft wide?

Yes, reducing the width to 8 feet is acceptable, as long as the mat is still stable at the top of the slope.

68 C-301 The New Work Drawing C-301 note 2 under detail B5 says the articulating concrete block mattress will be held together with steel cable, poly rope, or approved equal.

We assume this is meant for an individual mat. For example, an 8ft x 10ft mat would have the individual blocks held together.

We assume this does not mean that individual mats (8ft x 10ft) are held to the adjacent underwater mats by wiring them together after placement. Please clarify.

The individual mats are to be joined together per the manufacture recommendations. The intent is to provide continuous protection to the cable in this area where there is a high change of an anchor drag.

69 If the existing sensors and cables are no longer in use, can they be removed prior to installing the new cables?

The existing sensors and cables will be in use until May 14th. They may be removed after that date.

70 Milestones Milestone 2 for demolition has a start date of 5/15/24. There are dates listed for above mudline demo completion and below mudline demo completion. Can the retrieval of the sensors and submarine cable retrieval happen concurrently with the above mudline demo work?

The sensors and submarine cable can be removed any time after May14th.

71 For the pre-inspection of the existing 4” conduits. Can the contractor access the inside of the range house to use an internal camera for inspection of the existing 4” conduits?

Access to the range house for pictures can be arranged by calling the Director of MSF New London, Preston Tone Pah Hote at 860-437-0427.

72 Can the contractor perform a dive inspection of the existing 4” conduits from the shoreline in front of the range house?

The contractor can perform a dive inspection of whatever is visible off the shoreline in front of the range house.

73 Drawing D- 301 & 302

Demo Set Are all the sensors that use the acronym "MT" on drawing D-302 the same as the Type 6 Sensor Tube Detail (GFE) shown in Detail A5 on Drawing D-301?

Yes

74 Drawing D

Demo Set Please confirm all tubes marked as empty, including tube T5 (CT Sensor) are in-fact empty and do not require any removal scope.

Recover the CT sensor from tube T5 and deliver to the CM for the MSF Director Preston tone Pah Hote.

75 Drawing D

Demo Set Drawing D-302 Plan View also shows items described as stake piles. Are these to remain in place

Refer to the previously provided As-Built drawing for more information. See both inside and outside the dredge prism. If removal is required, can you provide details of these components (size and weight)?

Sheet C-006, on the Type 6 Upgrade drawings. These tubes are to abandoned in-place.

76 Drawing D

Demo Set Drawing D-302 Plan View also shows items described as cable support piles. Are these to remain in place both inside and outside the dredge prism. If removal is required, can you provide details of these components (size and weight)?

These are the same tubes as in Q75 and are to abandoned in-place.

77 Drawing D

Demo Set Please provide the approximate weight of the sensors so that we can better understand the tools and equipment required to remove them.

Magnetometer:

-- In water buoyant.

-- Out of water 3 LBs but attached to a 10 ft. PVC tube

– can weigh up to 30 lbs. in the water

Electromagnetic sensor:

-- In water buoyant.

-- Out of water 200 lbs.

SWC notes that the sensors are sturdy enough to be handled by a diver. In previous recovery efforts a sling was hoisted by a crane to lift the sensor to the barge.

NSWC will come out to pick up the sensors. Sheet D-301 shows where cable can be cut, details A2 and A5 show the types of sensors. Expect to recover about 2 sensors per day.

78 Drawing D

Demo Set The Detail of the EMT Sensor in A2, Drawing D-301 shows a sensor tube appearing to go through the sensor and to remain in place. Does the sensor slide up and off the top of the tube?

During installation the EMT base connection was slid over the Sch 80 pipe and then clamped in place.

79 Page 7 Spec 09 97 13.26

1.4.5.4, 1.4.5.5, 1.4.5.7

Specification 31 62 16.13 requires touchup painting to comply with SSPC-PA 1. Division 5 Steel Specifications also use the term Touch-up painting but do not specifically reference SSPC-PA 1.

Please confirm any painting on the project site related to touchup work around field welds on the structure (not piles) can also be applied with field workers as long as they follow SSPC-PA 1 and meets the various

Any field coating must be done in accordance with the specifications. The qualifications and QC requirements do not change based on shop or field application.

special inspection requirements, and that the special SSPC qualification for individuals and companies for coatings specified in Specification 09 97 13.26 only apply to the shop applied coatings and not to the field "touch-up" work.

80 Amendment #5

Question 40 As a clarification to Question #40 of Amendment 5, Please confirm we are allowed to extract the piling in one full piece (portion above and portion below mudline as one piece).

Yes, that is allowed as long as the schedule is met.

81 S-101, S-103 The 22"diameter corner pipes of the base section are labeled on the drawings as "PIPE". Our interpretation is these are intended to be grade A53 (max yield 35KSI) per specification. Questions: For 22", could A252 Grade 3 (modified to 50KSI Yield) be used?

Yes, A252 Grade 3 (modified to 50KSI Yield) is the indented material must be used.

82 S Drawings The 8-5/8" diameter (nominal 8" pipe) struts and bracing of the base section are labeled on the drawings as "PIPE". Our interpretation is these are intended to be grade A53 (max yield 35KSI) per specification. For nominal 8" A53 pipe, 5/8 wall thickness is not a scheduled wall thickness. Although shown in the steel manual, it is also not available in A500 HSS that we have found. Questions: For nominal 8" pipe, would A53 or A500 with a thicker wall be an allowable substitution?

The 'pipe' is structural steel tubing and is A500. A500 HSS with a thicker wall is allowable.

83 2 01 14 00 1.1 e Section e. 1) states, "EXWC will finish their install after completion of P-1097 DCS Building (3 months of work)". Please confirm EXWC's work will happen after Milestone 1 completion date of 6/24/24.

EXWC will not commence work in the DCS until after 6/24/24. The only exception is if the DCS is completed before that date.

84 2 01 14 00 1.1 e Section e. 2) states, "EXWC will remove all of their equipment from existing DCS Building by 5/25/2024 to allow for P-1097 demolition of existing DCS." The Milestone 2 Demolition Start date is 5/15/2024. Please coordinate these two dates so we can ensure that we submit a compliant schedule.

The current MSF range will cease operations on 5/14/24.

EXWC will commence removal of equipment in the DCS on 5/15/24 and complete removal by 5/25/24.

85 35 31 19.20 2.1 Table 1 note e. requires geotextile under the concrete block mats.

1. The purpose of the concrete mattress is to provide protection to the

1. Is the mat to be laid down first then the blocks set on top or is this geotextile somehow to be attached to the individual mats before setting?

2. Please provide the specifications for the geotextile. Woven, non-woven etc. We need this information as the manufactures doesn't guarantee friction angels and there isn't enough information to determine this.

3. Can the geotextile be removed from the contract?

cable from anchor drags rather than for erosion protection.

2. & 3. The geotextile does not need to be included if the manufacture doesn't recommended it based on the mudline conditions and applications. This consideration should also make sure there no significant settlement of the cable due to the mats.

86 31 62 16.13 Steel Pipe Pile Specifications states the furnishing, driving, and pulling of piles will be measurement for payment by the Linear Foot; pile driving tests, shoes and splices will be measured for payment by the Each. The price proposal form only has two bid items listed paid by the LS. Please clarify.

This contract has two lump sum items. Each contains pile work.

There will not be any other payment by Linear Foot or other measurement for any of the pile work.

87 01 45 35 Para 2.1 The referenced spec section indicates several certifications to be submitted by the fabricator in order to not be subject to special inspections. Other than the requirement for AISC certification (1st one listed), are the other others listed intended to be required?

Please refer to #14 response.

88 Demo Drawing D-301

The Connecticut Department of Energy & Environmental Protection letter in Attachment H authorized installation of the new cable via jet-plow to take place within the Feb 1 through Sept 30th seasonal time of year restriction on in-water work.

Please clarify whether or not side casting of the gravel and stone required to unearth the existing electro magnetic triaxial sensors and cables for removal is allowed within the aforementioned time of year restriction as well.

Side casting of the gravel and stone required to unearth the existing electromagnetic triaxial sensors and cables for removal is allowed within the aforementioned time of year restriction

89 Page 3 Specification 35 31 19.20

2.1.1 This paragraph references a

geotextile, however it is not metioned elsewhere or shown in the drawings. 1.2.1 discusses geotextiles for interlocking blocks as an option to cables. Please clarify if a geotextile fabric is required to be placed with the mattress. If so, is there any other

The purpose of the concrete mattress is to provide protection to the cable from anchor drags rather than for erosion protection. The geotextile does not need to be included if the manufacture doesn't recommended it based on the mudline conditions and applications.

requirements for this fabric regarding type, thickness, etc?

This consideration should also make sure there no significant settlement of the cable due to the mats.

90 Page 5 Specification 35 31 19.20

3.1.2 The placement tolerance provided

for the mats discusses vertical projections. Does this also relate to their plan location and how close they are set side by side? What is the tolerance for this?

Tolerance will be based on manufacturers recommendations for this application and the connection method between mats.

91 Drawing C-

Detail B5 Note 2 Note 2 under Detail B5 discusses mattresses being held together with steel cable, poly rope or approve equal. Is this discussing the material used to make each mattress, OR is this meant to require that we must tie individual mats together as they are placed underwater?

The individual mats are to be joined together per the manufacturer recommendations. The intent is to provide continuous protection to the cable in this area where there is a high change of an anchor drag.

92 Drawing D-

Note 3 Per drawings and specifications, sensors are to be removed and turned over to government. Is it the government's intensions that the sensors are to be removed with care and without damage?

The government’s intention is to REUSE the sensors so they are to be removed with care and without damage.

93 Amendment #5, Q#19

Thank you for the As-builts.

Referencing Amendment #5, Question #19, please confirm the existing driven piles that are to be removed were not filled with concrete.

If the piles are filled with concrete then it wasn’t in the original design.

94 C-101 S-101

The base section for the tower has 14 gauge metal decking secured to heavy 8" pipe framing suggesting that the base could be set directly on the river bed while driving pipe pile. The tower location is shown in the contract drawings with specific elevations throughout its height (S-101) and a specific northing and easting coordinate (C- 101). Resting the tower base on the riverbed while driving pile will be difficult (if not impossible) to hold tower in position to a close tolerance. If the intention is to set the tower base in this manner, what are the allowable positioning tolerances of the installation in the X, Y, and Z directions? If the tower is not intended to rest on the river bed, what is the purpose of the 14 gauge metal decking?

The 14 guage decking is meant to assist the contractor with placement of the rigid frame due to the softness of the mudline. It is not designed to repalce alternate methods, such as tempory piles, to make sure the frame stays in place during driving.

The ultimate means and methods is up to the contractor.

95 Spec 09 97 13.26

Para 1.4.5.2 Para 1.4.5.3

The referenced spec sections indicate that the coating inspection be performed by an SSPC QP5 certified company and by QP5 Level III qalified inspector. Do these requirements apply to any or all of the following cases:

1. Coatings applied in a paint shop certified to SSPC QP3 or AISC Sophisticated Paint Endorsement,

2. Coatings applied in the field as part of structural steel field assembly, and/or

3. Coatings applied for touching up field welds and handling damage after tower is erected in final position.

They apply to all of the cases.

96 Spec 09 97 13.26

Para 3.5.2.3 The referenced spec section indicates coating repairs and touch-up must recieve a surface preparation of SP10, which is only accomplished by grit blasting. In the case of coating repiars over the water, full containment will be needed to perform any grit blasting.

Can SP11, accomlished by power tools, be provided in lieu of SP10 for coating repairs at field welds and instances of handling damage?

Assuming an appropiate profile has been established as part of prior prep, grit blasting with containment will not be required for minor coating repairs, as long as the contractors QC specialist is in agreement and it is included in the contractors QC plan.

97 Spec 09 97 13.26

Para 3.3.1 As a continuation of previous question: If SP11 prep is acceptable for coating repairs, please confirm that full containment per para 3.3.1 will not be required as long as other capture methods are employed such as power tools fitted with vacum collection equipment.

See answer to #96

98 Dwg S-506 S-506 provides information of contractor supplied chain hoists.

1. Please confirm only 1 chain hoist is to be provided, and

2. Please confirm the total lift length for the hoist is from the bottom of the Sensor Drop Pipe to the height of the lower davit.

One chain hoist is to be supplied. The chain must be able to lift an item from the mudline to the top when attached to the upper davit.

99 Suppliers of the MV Disconnect Switch are stating that the lead time for this item is 60 weeks after approved drawings. Lead times for the two MV Transformers are 104 weeks (2 years) after approved drawings. Without these items work in the Range House and DCS Tower will not be able to be completed to meet the Milestone 1

Bid per the RFP.

date or the current contract duration. In order to accommodate these lead times the Contract duration would need to be over 900 calendar days. Physical work onsite would also want to be delayed to align with the delivery of the electrical components to save re-mobilization costs to complete the work. Please let us know how to proceed knowing this information.

(End of Summary of Changes)