AMENDMENT 0002 W912P621R0010 CHICAGO HBR LOCK CHAMBER FLOOR AND WALL REPAIR.pdf

W81G6610966491

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

REFERENCE: REQUEST FOR PROPOSALS (RFP) NO. W912P621R0010, CHICAGO HARBOR LOCK CHAMBER FLOOR AND WALL REPAIR, CHICAGO, COOK COUNTY, ILLINOIS

A. The Proposal Due Date is changed by this Amendment. The proposal due time is unchanged. Therefore, proposals are due prior to 4:30 p.m. (Central Time) on September 7, 2021. -For further details regarding offer and evalutation information, please refer to Solictation Section 00 21 16 - Instructions to Proposers.

-- THIS AMENDMENT CONTINUES ON THE FOLLOWING PAGES --

1. CONTRACT ID CODE PAGE OF PAGES

1 28

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

16C. DATE SIGNED

BY 24-Aug-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 W912P621R0010

X 9B. DATED (SEE ITEM 11)

30-Jul-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 X is extended, 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-Aug-2021

CODE

U.S. ARMY ENGINEER DISTRICT, CHICAGO

231 SOUTH LASALLE STREET SUITE 1500

CHICAGO IL 60604-1437

W912P6 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912P621R0010

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

SUMMARY OF CHANGES

B. REVISED BID SCHEDULE: The government is providing a revised bid schedule (Section 00 10 00 – Solicitation Contrat Form), which corrects Item No. 0008AC (Dredging) and Item No. 0008AE (Aggregate Base).

The quantities should have been 12,005 square Foot. As a result of the revisions, Proposers shall remove and replace the previously issued respective Section with the Revised Section 00 10 00 enclosed hereunder. Proposers shall provide their prices on the Revised Pricing Schedule.

C. AMENDED SPECIFICATION SECTIONS: The following Specification Sections have been revised. The revised sections are enclosed hereunder and replace the previously furnished sections.

• SECTION 01 22 00.00 10, Measurement and Payment, adjusted CLIN numbering o Paragraph 1.1.5.1 – Added Survey requirement o Paragraph 1.2.9.1 – Added clarifications on survey requirements o Paragraph 1.2.9.2 – Updated accuracy requirements o Paragraph 1.2.11.1 – Updated survey requirements o Paragraph 1.2.11.2 – Updated accuracy requirements o Paragraph 1.2.12.1 – Added survey requirement o Paragraph 1.2.12.2 – Added accuracy requirement

• SECTION 03 01 00, Concrete Demolition o Paragraph 3.1 – Removed language suggesting there are electrical lines in the concrete.

• SECTION 01 78 00, Closeout Submittals o Paragraph 1.5.2 – Added hydrosurvey deliverable language

D. AMENDED DRAWING SHEETS: The following Drawing Sheets have been revised and are hereunder enclosed replacing the previously furnished respective sheets.

SHEET REF.

NO.

SHEET TITLE DESCRIPTION

C-102 Existing Conditions – Lidar & Topography

Updated note 3 which summarizes survey requirements

CS-301 Cross Sections Removed middle floor proposed lines from station 101+70 thru 104+30. Added note referencing to CS-101 & 102 (transition)

CS-302 Cross Sections Removed middle floor proposed lines from station 101+70 thru 104+30. Added note referencing to CS-101 & 102 (transition)

CS-303 Cross Sections Removed middle floor proposed lines from station 101+70 thru 104+30. Added note referencing to CS-101 & 102 (transition)

CS-304 Cross Sections Removed middle floor proposed lines from station 101+70 thru 104+30. Added note referencing to CS-101 & 102 (transition)

E. CONTRACTOR’S INQUIRIES: By this Amendment, the Chicago District, USACE responds to Contractor’s inquiries.

INQUIRY 1: How often is de-icing, flushing, and gate maintenance performed in the lock chamber?

USACE RESPONSE INQUIRY 1: Stall stop reports listing ice flushing operations from 2016 to 2019 attached. No flushing may be required if contractor mitigates ice actively.

INQUIRY 2: The specifications require the Contractor to have an approved emergency plan to evacuate and remove construction equipment during an emergency or backflow event. How many emergency or backflow events should we anticipate per construction season?

USACE RESPONSE INQUIRY 2: In 6 of the past 10 years, we’ve seen one backflow per year. It would be reasonable to anticipating one backflow event per construction season can occur.

INQUIRY 3: Please confirm that as long as the lake gate is closed, the river gate can be opened and shut as often as need by the contractor to perform the work.

USACE RESPONSE INQUIRY 3: As long as the lake gate is closed the contractor can open and shut the riverside gate as often as needed to perform work by coordinating with the control tower.

INQUIRY 4: Has a drilling plan been performed for this project, or is the Contractor expected to perform the sample drilling plan detailed in pages 197-220 of the specification?

USACE RESPONSE INQUIRY 4: The Contractor should update the drilling plan provided based on the contractor’s proposed drilling methodology and submit for approval.

INQUIRY 5: Can the lidar scan files be provided to the contractor for review?

USACE RESPONSE INQUIRY 5: Yes lidar can be provided. Find attached in sam.gov.

INQUIRY 6: Specification 35 20 23-3.2 notes that other than mechanical excavation means and methods shall be used within 4 ft of the sheet pile walls. What does the USACE consider mechanical excavation? Is a clam shell or excavation bucket allowed withing 4 ft of the sheet pile walls or do you want hydraulic dredging to occur in this area. Please elaborate on examples of allowable excavation in this area.

USACE RESPONSE INQUIRY 6: Any method of excavation is permissible provided that the equipment or work will not damage (accidently strike, rupture, etc.) the existing sheet pile walls. Other means and methods may constitute submitting additional engineering or administrative controls to prevent any damage within 4 feet of the sheet pile walls.

INQUIRY 7: Drawing S-105, note 5 calls for the use of a braced reinforcement steel cage, however the exact use for this item is unclear. Please elaborate on what the USACE intends for this cage to be utilied for.

USACE RESPONSE INQUIRY 7: The braced reinforcement steel cage is intended to build the top and bot mats of the reinforced concrete floor. It is contractor responsibility to decide the size of the reinforcement steel cage, reinforcement overlaps, location of the construction joints, and other construction details that must be submitted for USACE approval as stated in note 5.

INQUIRY 8: Please confirm the US Army Corps of Engineers will claim “Generator” status for any preexisting hazardous waste/non-special waste materials encountered on this project and that they will indemnify the Contractor in connection to such materials.

USACE RESPONSE INQUIRY 8: To the extent that pre-existing hazardous waste or non-special waste materials are present and require removal, USACE may be considered a generator of those materials. The federal government, including USACE, cannot provide indemnification to contractors based on fiscal law restrictions.

INQUIRY 9: Specification 03 01 00 - 3.1 details that electrical lines or embedded items must not be damaged during sawcutting or line drilling operations, however the provided drawings do not detail any electrical lines or embedded items inside the concrete areas to be removed. Is the USACE aware of embedded items that must be protected during demolitions, and if so can details be provided on their locations?

USACE RESPONSE INQUIRY 9: USACE is unaware of any electrical lines

INQUIRY 10: Can a sample subcontracting plan be provided?

USACE RESPONSE INQUIRY 10: Any information may be submitted which is relevant to the evaluation riteria. However, USACE has implemented a 25 maximum page limit to include all documents and attachments.

INQUIRY 11: Does detailed schedule information need to be included in the proposal for work in options 1 or 2 that is not part of the base bid package?

USACE RESPONSE INQUIRY 11: Only schedule information required for the proposal are items included in the base bid.

INQUIRY 12: I was asked at the pre-bid meeting to formally submit the following question:

The specified hollowbar size utilized for micropiles is not produced domestically based on conversations with suppliers. Please confirm that the Buy American clause for this project allows for foreign steel and fasteners produced in a “designated country” named in FAR 52.225-11

USACE RESPONSE INQUIRY 12: Yes the Buy American Act Clause is in the contract. Therefore potential firms can order outside of US if the country they are resourcing from is covered under the trade agreement.

INQUIRY 13: The hollow bar method of micropile installation uses a single sacrificial drilling bit that is typically designed for one type of subsurface condition i.e., soil or rock. Changing of drill bits during installation is not an option though will be required in order to drill the required rock socket.

USACE RESPONSE INQUIRY 13: Bits are available that cut both soil and rock

INQUIRY 14: Will the government permit alternative micropile methods of installation and material so, long as the required test and design loads are achieved and proofed?

USACE RESPONSE INQUIRY 14: Contractors are to bid the contract as written

INQUIRY 15: Please confirm the quantity for ITEM No. 0008AC & ITEM No. 0008AE. There appears to be an error.

USACE RESPONSE INQUIRY 15: The quantities for item no. 0008AC and 0008AE are corrected by this Amendment No. 0002. The quantity for item no. 0008AC is 12,005 SF and item no. 0008AE is 12,005 SF.

INQUIRY 16: I wanted to know if there is a sign in sheet for the August 10th walkthrough that you can or someone else can pass along to me.

USACE RESPONSE INQUIRY 16: The sign in sheet for the August 10th walkthrough is published at sam.gov of the solicitation notice in the attachments section.

INQUIRY 17: I’m requesting a four week bid extension for the referenced project due to the technical nature of the project and the required coordination with the SBE community. We feel the extra time would allow for a more complete proposal and we believe that completing any work during this first shutdown season, starting November of 2021 is highly unlikely due to required submittals and planning that would go into this after award.

USACE RESPONSE INQUIRY 17: An extension will not be considered, as the Government intends to make an award this fiscal year.

Regarding the comment stating work likely will not be performed the first potential season (November 2021), that’s correct. However, they have until April 2023 before the first Liquidated Damage milestone would kick

in. If they’re able to complete work in winter 21/22 great, that’s bonus time they can give themselves. If not, also fine they should be able to complete Phase 3 & 4 of the walls by winter 22/23.

INQUIRY 18: Will the Government permit a “bubble curtain” to be used in lieu of a geotextile fabric curtain? The bubble curtain will likely reduce the loss of sediment because it doesn’t have to be physically opened and closed

USACE RESPONSE INQUIRY 18: USACE will not permit a bubble curtain in lieu of a turbidity curtain.

INQUIRY 19: Section 1.2.8.1 states “the Government will perform the multi-beam survey after dredging”. Section

1.2.8.2 states “ the contractor will submit the multi-beam data. Please confirm whom is responsible for the multi-beam survey?

USACE RESPONSE INQUIRY 19: Contractor will perform a post dredge survey. The Government will perform a quality assurance dredge survey after for payment purposes.

INQUIRY 20: Section 1.2.8.2 – Confirm the tolerances of the multi-beams survey.

USACE RESPONSE INQUIRY 20: Tolerance updated to +/- .1 foot per this Amendment No. 0002.

INQUIRY 21: Can bidders include previously submitted Past Performance Questionnaires (PPWs), in their entirety, for Factor II: Past Performance rather than utilizing the provided sample PPQ form?

USACE RESPONSE INQUIRY 21: Yes, bidders can include previously submitted Past Performance Questionnaires (PPWs), in their entirety, for Factor II: Past Performance rather than utilizing the provided sample PPQ form

INQUIRY 22: Currently the specifications indicated that all the existing steel bullnose will be repainted and left in place, not providing new steel bullnose. Could USACE please indicated the exact areas that are referenced as “bullnose”, and what would the specified area of armor that needs to be repainted? Bid item 0005AE indicates “New Steel Bullnose”. Will there be any new steel bullnose or wall armor to be fabricated and installed on this project? If so could you provide drawings indicated quantity and location of all areas requiring new steel bullnose or wall armor of any kind.

USACE RESPONSE INQUIRY 22: That is correct, the existing steel bullnose will be repainted and left in place and no new steel bullnose will replace the existing. However, there are exact areas referenced on sheets S-107, S-108, S-109, and S-110, denoted “Area of Bullnose Placement” which applies to the Bid Item 0005AE “New Steel Bullnose” since there is currently no steel bullnose (armoring) in these indicated areas. Note that all metal surfaces fabricated & existing will require painting.

INQUIRY 23: Will the contractor have access to any existing electrical services on this site? If so, could USACE provide some details on what this service provides (Location & Wattage/Voltage/Amperage).

USACE RESPONSE INQUIRY 23: There is 120v and 480v access located in the parking lot (near the staging area) that may be utilized with coordination from USACE operations. Any power brought in at Lock must be coordinated between the Contractor and ComEd.

INQUIRY 24. Could USACE provide updated quantities for bid items 0008AC & 0008AE. These quantities currently read as 120,005 SF. Can the government confirm that these quantities are incorrect and provide the updated quantity to use on the bid form?

USACE RESPONSE INQUIRY 24: See USACE response Inquiry 15 of this Amendment No. 0002.

INQUIRY 25: Will the contractors be allowed to hook up to the utilities on site such as water?

USACE RESPONSE INQUIRY 25: There are no utility hookups for water.

INQUIRY 26. Is any information available such as strength of existing concrete and the aggregate size in the existing concrete?

USACE RESPONSE INQUIRY 26: Find attached report (compressive strengths) for strength and aggregate size for chamber walls.

INQUIRY 27: Has any background laboratory analysis been conducted on target dredge material? If so, have any of the results indicated the presence of elevated levels of substances or materials regulated by the state or federal government?

USACE RESPONSE INQUIRY 27: The Contractor will need to characterize the sediment for dredging and disposal. Section 35 20 23 (Dredging) of the project specifications, Paragraph 1.5 (Material To Be Removed) says that the material is clay, silt, fine sands and mud. USACE has not completed any recent background laboratory analysis.

INQUIRY 28: What is the intended or perceived fate of the target dredge material? Reuse? Unregulated waste?

Regulated waste?

USACE RESPONSE INQUIRY 28: Based on old data (grab samples collected in 1980 from outside the lock chamber), the material would be considered non-regulated waste and would not be suitable for reuse; the material would need to go to a landfill. The older data does not indicate the sediment would be considered as regulated waste that was RCRA hazardous waste or a special waste. Paragraph 1.16 (Permits) of the same section cited earlier says the following: “The contractor shall comply with conditions and requirements of the Corps of Engineers Permits and real estate instruments, and other State or Federal permitting requirements.

See Section 01 57 20.01 03 ENVIRONMENTAL PROTECTION FOR ILLINOIS for waste disposal, permit and Stormwater Pollution Prevention Plan requirements. The contractor is responsible for obtaining any additional permits as necessary to perform the work.”

INQUIRY 29: Clarify if there are limitations on where construction joints can be placed in the floor. Also, can additional expansions joints be used?

USACE RESPONSE INQUIRY 29: Construction joints to be located in the floor per the requirements of spec 03 31 30 - 3.9.11. Expansion joints to be located as indicated in the drawings S-105 to S-106.

INQUIRY 30: Is there an over dredge tolerance for the dredging that will be allowed payable?

USACE RESPONSE INQUIRY 30: There is a maximum over dredge tolerance stated in section 35 20 23, Paragraph 1.15.1, “Materials actually removed from within the chamber are permitted to a depth of not more than 0.5 foot below the required dredging prism line.” – It should be noted, this CLIN is based upon Square Feet (Area), and not paid out by Cubic Yards (Volume). There is no extra payment for over dredge quantity and all reaches of the proposed grade must be achieved for final payment.

INQUIRY 31: Is there a tolerance for the placement of each filter layer?

USACE RESPONSE INQUIRY 31: Based on note 2, Sheet S-302 that there will be a total surface tolerance - /+ 2 inch at the top of floor. Filter layer thickness may vary (thickness not less than 6 inch for both filter layers) depending on dredged grade elevation to achieve acceptable concrete surface elevation that must meet the final tolerance.

INQUIRY 32: Will filter material be placed to account for allowable over dredge be payable?

USACE RESPONSE INQUIRY 32: The filter material placed will be paid by the Square Feet (Area) of placement.

INQUIRY 33: In Amendment 1 Sheet CS101 has a call out to the south wall “ALLOWED STAGE STORAGE AREA ALONG SOUTH LOCK WALL BUT NO MOORING ALLOWED”. In solicitation Sheet C101, mooring is allowed in the lock as approximate location – mooring area 3. Can the GOV please clarify the amendment note.

USACE RESPONSE INQUIRY 33: Sheet CS101 is incorrect, mooring is permissible in that area. See updated drawing sheet in this Amendment No. 0002.

INQUIRY 34: Will ready mix uniformity testing be required?

USACE RESPONSE INQUIRY 34: ASTM C 94 Mixture Uniformity testing is required for the lock wall and lock floor concrete mixtures.

F. WAGE DETERMINATION: This Amendment encloses the most recent Wage Determination, General Decision IL20210009 08/13/2021.

G. CHICAGO LOCK STALL STOP REPORTS AND COMPRESSIVE STRENGTHS REPORT: This Amendment No. 0002 encloses the Chicago Lock Stall Stop Reports and Compressive Strengths Report in reference to Contractor’s Inquiry No. 1 and Inquiry No. 26 via this Amendment No. 0002. The reports follows on the next pages.

H. HYDROSURVEY (BLUEVIEW SCAN): By this Amendment, the Chicago District, USACE informs interested offerors to see retrievable data files via a zip file at the attachments section of the solicitation notice for the Hydrosurvey (Blueview Scan) in reference to Contractor’s Inquiry No. 5 via this Amendment No. 0002.

I. POINT OF CONTACT: The Point of Contact for this Amendment is Ericka Hillard at ericka.d.hilard@usace.army.mil.

END OF AMENDMENT NO. 0002

(REVISED PRICING SCHEDULE AND REVISED SPECIFICATIONS AND DRAWINGS ALONG WITH THE

MOST RECENT WAGE DETERMINATION AND THE STOP REPORTSAND COMPRESSIVE AND

STRENTHS REPORT FOLLOWS

ON THE NEXT PAGES)

REVISED (VIA AMENDMENT NO. 0002)

Section 00 10 00 – Solicitation

ITEM NO SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

BASE WORK -

FFP

WALLS PHASE 3 & 4, FLOOR EAST SIDE

WALL RESURFACING (BASE WORK - YEARS 2022/2023)

This is a Parent Line Item identifying the work that relates directly to its Sub-Line Items 0001AA through 0004; the Sub-Line Items themselves identify the quantities required to perform said work. Therefore, the Contractor shall provide the pricing separately at Sub-Items 0001AA through 0004.

PURCHASE REQUEST NUMBER: W81G6610966491

NET AMT

0001AA 1 Job

MOBILIZATION/DEMOBILIZATION

FFP

(FOR THE WORK OF 0001AB THROUGH 0001AD)

Under this CLIN, the contractor is required to perform mobilization and demobilization activities. Reference: SOLICITATION SECTION 00 70 00, SEE DFARS Clause 252.236-7004 Payment for Mobilization and Demobilization.

PSC CD: Y1PZ

0001AB 1 Job

COFFERDAM AND DEWATERING

FFP

0001AC 540 Linear

Foot

CONCRETE RE-SURFACE WITH BULLNOSE

0001AD 2 Each

NEW STEEL LADDERS

WALKWAY RESURFACING

FFP

(BASE WORK - YEARS 2022/2023)

This is a Parent Line Item identifying the work that relates directly to its Sub-Line Items 0002AA through 0002AE; the Sub-Line Items themselves identify the quantities required to perform said work. Therefore, the Contractor shall provide the pricing separately at Sub-Items 0002 through 0002AE.

0002AA 540 Linear

REINFORCED CONCRETE WALKWAY

0002AB 9 Each

RE-INSTALL YELLOW CLEATS

0002AC 19 Each

NEW RED CLEATS

0002AD 6 Each

NEW CHECKPOST

0002AE 540 Linear

NEW RAILING

TREMIE CONCRETE FLOOR

FFP

(BASE WORK - YEARS 2023/2024)

This is a Parent Line Item identifying the work that relates directly to its Sub-Line Items 0003AA through 0003AH; the Sub-Line Items themselves identify the quantities required to perform said work. Therefore, the Contractor shall provide the pricing separately at Sub-Items 0003AA through 0003AH.

0003AA 1 Job

UNDERWATER TREMIE CONCRETE DEMONSTRATION

0003AB 1 Job

MOBILIZATION/DEMOBILIZATION

FFP

(FOR THE WORK OF 0003AB THROUGH 0003AG)

Under this CLIN, the contractor is required to perform mobilization and demobilization activities. Reference: SOLICITATION SECTION 00 70 00, SEE

0003AC 1 Job

MUD PUPPIES - BAIT, TRAP, & RELEASE

FFP

PROGRAM

0003AD 1 Job

REMOVE EXISTING PRE-CAST FLOOR PANELS &

FFP

& CONCRETE DEBRIS

0003AE 12,115 Square

DREDGING

0003AF 40 Each

ROCK ANCHORS

0003AG 12,115 Square

AGGREGATE BASE

0003AH 12,115 Square

REINFORCED TREMIE CONCRETE SLAB

0004 1 Lot

PERFORMANCE AND PAYMENT BONDS

FFP

This item is for bond coverage, which is applicable to line items 0001AA through

0003AH

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds- Construction).

OPTION GROUP OPTION 1 ITEMS - FLOOR WEST SIDE

FFP

WALL RESURFACING (OPTION WORK - YEARS 2024/2025)

This is a Parent Line Item identifying the work that relates directly to its Sub-Line Items 0005 through 0007; the Sub-Line Items themselves identify the quantities required to perform said work. Therefore, the Contractor shall provide the pricing separately at Sub-Items 0005 through 0007.

0005AA 1 Job

OPTION MOBILIZATION/DEMOBILIZATION

FFP

(FOR THE WORK OF 0005AB THROUGH 0005AF)

Under this CLIN, the contractor is required to perform mobilization and demobilization activities. Reference: SOLICITATION SECTION 00 70 00, SEE

0005AB 1 Job

OPTION COFFERDAM AND DEWATERING

0005AC 11,465 Linear

OPTION CONCRETE RE-SURFACE WITH BULLNOSE

0005AD 36 Each

OPTION NEW STEEL LADDERS

0005AE 11,900 Linear

OPTION NEW STEEL BULLNOSE

0005AF

- DUE TO SYSTEM LMITATIONS, THIS PREVIOUSLY USED CONTRACT

LINE ITEM CANNOT BE DELETED AND THEREBY SHOULD BE

DISREGARDED -

OPTION WALKWAY RESURFACING

FFP

(OPTION WORK - YEARS 2024/2025)

This is a Parent Line Item identifying the work that relates directly to its Sub-Line Items 0006; the Sub-Line Items themselves identify the quantities required to perform said work. Therefore, the Contractor shall provide the pricing separately at Sub-Items 0006.

0006AA 540 Linear

OPTION REINFORCED CONCRETE WALKWAY

0006AB 11 Each

OPTION RE-INSTALL YELLOW CLEATS

0006AC 17 Each

OPTION NEW RED CLEATS

0006AD 7 Each

OPTION NEW CHECKPOST

0006AE 540 Linear

OPTION NEW RAILING

0007 1 Lot

OPTION PERFORMANCE AND PAYMENT BONDS

FFP

This item is for bond coverage, which is applicable to line items 0005AA through

0006AE

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds-

OPTION GROUP OPTION 2 ITEMS - FLOOR WEST SIDE

FFP

TREMIE CONCRETE FLOOR (OPTION WORK - YEARS 2025/2026)

This is a Parent Line Item identifying the work that relates directly to its Sub-Line Items 0008 through 0010; the Sub-Line Items themselves identify the quantities required to perform said work. Therefore, the Contractor shall provide the pricing separately at Sub-Items 0008 through 0010.

0008AA 1 Job

OPTION MOBILIZATION/DEMOBILIZATION

FFP

(FOR THE WORK OF 0008AA THROUGH 0008AF)

Under this CLIN, the contractor is required to perform mobilization and demobilization activities. Reference: SOLICITATION SECTION 00 70 00, SEE

0008AB 1 Job

OPTION REMOVE EXISTING PRE-CAST FLOOR PANELS

0008AC 12,005 Square

OPTION DREDGING

0008AD 40 Each

OPTION ROCK ANCHORS

0008AE 12,005 Square

OPTION AGGREGATE BASE

0008AF 12,005 Square

OPTION REINFORCED TREMIE CONCRETE SLAB

0009 1 Job

OPTION MUD PUPPIES - BAIT, TRAP, & RELEASE

FFP

PROGRAM

0010 1 Lot

OPTION PERFORMANCE AND PAYMENT BONDS

FFP

This item is for bond coverage, which is applicable to line items 0008AA through

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds-

SUMMATION OF PROPOSED PRICING

- THE CONTRACTOR SHALL ENSURE ITS PRCING SET FORTH BELOW IS ACCURATE AND

PROPERLY CALCULATED -

SUBTOTAL BASE WORK ITEMS (0001AA THROUGH 0004):

SUBTOTAL OPTION 1 WORK ITEMS (0005AA THROUGH 0007):

SUBTOTAL OPTION 2 WORK ITEMS (0008AA THROUGH 00010):

OVERALL PROPOSED PRICE (TOTAL OF ALL AFOREMENTIONED SUBTOTALS):

END OF REVISED PRICING SCHEDULE

Chicago Lock Chamber Floor and Wall Repairs W912P621R0010

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 22 00.00 10

PRICE AND PAYMENT PROCEDURES

08/15

PART 1 GENERAL

1.1 SINGLE JOB PAYMENT ITEMS

1.1.1 Mobilization/Demobilization (Base Bid Item 0001AA, Base Bid

Item 0003AB, Option 1 Item 0005AA, and Option 2 Item 0008AA)

1.1.1.1 Payment

1.1.1.2 Unit of Measure

1.1.2 Cofferdam and Dewatering (Base Bid Item 0001AB, and Option 1

0005AB)

1.1.2.1 Payment

1.1.2.2 Unit of Measure

1.1.3 Underwater Tremie Concrete Demonstration (Base Bid Item 0003AA)

1.1.3.1 Payment

1.1.3.2 Unit of Measure

1.1.4 Mud Puppies - Bait, Trap, & Release Program (Base Bid Item

0003AC, and Option 2 Bid Item 0009)

1.1.4.1 Payment

1.1.4.2 Unit of Measure

1.1.5 Remove Existing Pre-Cast Floor Panels & Concrete Debris (Base

Bid Item 0003AD, and Option 2 Bid Item 0008AB)

1.1.5.1 Payment

1.1.5.2 Unit of Measure

1.1.6 Performance and Payment Bonds (Base Bid Item 0004, Option 1

Bid Item 0007, and Option 2 Bid Item 0010)

1.1.6.1 Payment

1.1.6.2 Unit of Measure

1.2 UNIT PRICE PAYMENT ITEMS

1.2.1 Concrete Re-Surface with Bullnose (Base Bid Item 0001AC, and

Option 1 Bid Item 0005AC)

1.2.1.1 Payment

1.2.1.2 Measurement

1.2.1.3 Unit of Measure

1.2.2 New Steel Ladders (Base Bid Item 0001AD, and Option 1 Bid Item

0005AD)

1.2.2.1 Payment

1.2.2.2 Measurement

1.2.2.3 Unit of Measure

1.2.3 New Steel Bullnose (Option Bid Item 0005AE)

1.2.3.1 Payment

1.2.3.2 Measurement

1.2.3.3 Unit of Measure

1.2.4 Reinforced Concrete Walkway (Base Bid Item 0002AA, and Option

1 Bid Item 0006AA)

1.2.4.1 Payment

1.2.4.2 Measurement

1.2.4.3 Unit of Measure

SECTION 01 22 00.00 10 PAGE 1

AMD#002 - 08/18/21

1.2.5 Re-Install Yellow Cleats (Base Bid Item 0002AB, and Option 1 Bid Item 0006AB)

1.2.5.1 Payment

1.2.5.2 Measurement

1.2.5.3 Unit of Measure

1.2.6 New Red Cleats (Base Bid Item 0002AC, and Option 1 Bid Item

0006AC)

1.2.6.1 Payment

1.2.6.2 Measurement

1.2.6.3 Unit of Measure

1.2.7 New Check Post (Base Bid Item 0002AD, and Option 1 Bid Item

0006AD)

1.2.7.1 Payment

1.2.7.2 Measurement

1.2.7.3 Unit of Measure

1.2.8 New Railing (Base Bid Item 0002AE, and Option 1 Bid Item

0006AE)

1.2.8.1 Payment

1.2.8.2 Measurement

1.2.8.3 Unit of Measure

1.2.9 Dredging (Base Bid Item 0003AE, and Option 2 Bid Item 0008AC)

1.2.9.1 Payment

1.2.9.2 Measurement

1.2.9.3 Unit of Measure

1.2.10 Rock Anchors (Base Bid Item 0003AF, and Option 2 Bid Item

0008AD)

1.2.10.1 Payment

1.2.10.2 Measurement

1.2.10.3 Unit of Measure

1.2.11 Aggregate Base (Base Bid Item 0003AG, and Option 2 Bid Item

0008AE)

1.2.11.1 Payment

1.2.11.2 Measurement

1.2.11.3 Unit of Measure

1.2.12 Reinforced Tremie Concrete Slab (Base Bid Item 0003AH, and

Option 2 Bid Item 0008AF)

1.2.12.1 Payment

1.2.12.2 Measurement

1.2.12.3 Unit of Measure

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION

3.1 CONTRACT COST BREAKDOWN

-- End of Section Table of Contents --

SECTION 01 22 00.00 10 PAGE 2

SECTION 01 22 00.00 10

PRICE AND PAYMENT PROCEDURES

08/15

PART 1 GENERAL

1.1 SINGLE JOB PAYMENT ITEMS

Payment items for the work of this contract for which contract job payments will be made are listed in the BID SCHEDULE and described below.

All costs for items of work, which are not specifically mentioned to be included in a particular job or unit price payment item, are included in the listed job item most closely associated with the work involved. The job price and payment made for each item listed constitutes full compensation for furnishing all plant, labor, materials, and equipment, and performing any associated Contractor quality control, environmental protection, meeting safety requirements, tests and reports, and for performing all work required for which separate payment is not otherwise provided.

1.1.1 Mobilization/Demobilization (Base Bid Item 0001AA, Base Bid Item 0003AB, Option 1 Item 0005AA, and Option 2 Item 0008AA)

Under this Contract Line Item Number (CLIN), the Contractor is required to perform mobilization and demobilization activities. The Contractor will be compensated for the totality of its activities needed to mobilize and demobilize its equipment and labor force to the project site. Base Bid Item 0001AA shall include items required for work including wall resurfacing activities (phase 3 & 4) ONLY, this work shall take place during 2021/2023. Base Bid Item 0003AB shall include items required for work including east floor repair activities ONLY, this work shall take place during 2023/2024. Option 1 Bid Item 0005AA shall include items required for work including wall resurfacing activities (phase 1 & 2) ONLY, this work shall take place during 2024/2025. Option 2 Bid Item 0008AA shall include items required for work on the west floor section ONLY, this work shall take place during 2025/2026.

1.1.1.1 Payment

Payment will be made for cost associated with mobilization and demobilization, as defined in Special Contract DFARS 252.236-7004 (PAYMENT FOR MOBILIZATION AND DEMOBILIZATION). The percentage of payment for this CLIN shall be split for mobilization and demobilization into a 60%/40% split respectively for each CLIN.

1.1.1.2 Unit of Measure

Unit of Measure: JOB

1.1.2 Cofferdam and Dewatering (Base Bid Item 0001AB, and Option 1 0005AB)

1.1.2.1 Payment

Full compensation for all labor, equipment, materials, and incidentals for the fabrication, installation, maintenance, removal, and disposal of the

SECTION 01 22 00.00 10 PAGE 3

cofferdam necessary to facilitate construction as provisioned in the specifications. Dewatering operations for the cofferdam will be incidental to this bid item. See Section 31 23 19 , PROTECTION AND DEWATERING. These items shall be included at the contract JOB price for this bid item of the Bidding Schedule. Payments will be made monthly as progress payments based on the completion status per the approved cost loaded construction schedule as defined in contract Section 01 32 01.00 10 , PROJECT SCHEDULE.

1.1.2.2 Unit of Measure

Unit of Measure: JOB

1.1.3 Underwater Tremie Concrete Demonstration (Base Bid Item 0003AA)

Under this CLIN the Contractor is required to perform a demonstration of concrete floor panel placement within the Chicago Harbor Lock Chamber.

The contractor shall prove ability to place concrete which conforms to specifications underwater using the tremie method adhering to all criteria in Section 03 31 30 , MARINE CONCRETE - UNDERWATER TREMIE CONCRETE. Any permitting required to perform this demonstration must be acquired by the contractor before work begins.

1.1.3.1 Payment

Full compensation for all labor, equipment, materials, and incidentals for the fabrication, installation, maintenance, removal, and disposal of the underwater tremie concrete demonstration shall be included in this bid item. Payment shall be made after successful demonstration of underwater tremie concrete placement. There shall be a 10% withholdings for this pay item which will be paid after the Contractor has fully demolished and removed the concrete specimens and restored the site to acceptable conditions after all inspections have been completed.

1.1.3.2 Unit of Measure

Unit of Measure: JOB

1.1.4 Mud Puppies - Bait, Trap, & Release Program (Base Bid Item 0003AC, and Option 2 Bid Item 0009)

Under this CLIN, the Contractor is required to prepare an Ecological Protection Plan to safely catch, remove, and relocate Mudpuppies found within the Chicago Lock Chamber. The requirements of the Ecological Protection Plan are specified in Section 01 11 00 , SUMMARY OF WORK. Base Bid Item 0003AC shall include activities for work in the second construction season ONLY. Option 2 Bid Item 0006 shall include activities for work in the third construction season ONLY.

1.1.4.1 Payment

Full compensation for all labor, equipment and materials for the activities involved for identifying and providing reasonable roundup, capture, and release at a suitable location of any Mudpuppy species within the Chicago Lock Chamber. Whenever gates are opened the Contractor must again perform activities in approved Ecological Protection plan to remove mudpuppies from lock chamber. Payments will be made monthly as progress payments based on monthly maintenance costs associated with the work in the approved cost loaded schedule. There shall be a 10% withholdings for

SECTION 01 22 00.00 10 PAGE 4

this pay item which will be paid after Contractor has fully demobilized for the season and demonstrated mudpuppies were identified and properly caught and released throughout the work period.

1.1.4.2 Unit of Measure

Unit of Measure: JOB

1.1.5 Remove Existing Pre-Cast Floor Panels & Concrete Debris (Base Bid Item 0003AD, and Option 2 Bid Item 0008AB)

Under this CLIN the Contractor is required to remove and dispose of pre-cast concrete blocks within the delineated area of the Chicago Lock Chamber floor respective for each CLIN shown in the drawings. The Contractor shall additionally remove any debris throughout the 'entire' lock chamber for each CLIN. The Chicago Lock Chamber floor consists of three rows of 82 pre-cast panel blocks with approximately 4 inch spacing between each block for a total of 246 blocks. Debris are defined as pre-cast concrete floor panels where part of the panel no longer resides within its originally installed location as shown on the referenced original as-builts. Debris are further defined to be displaced concrete ballast blocks, and other foreign objects within the delineated areas of the respective CLINs. Test borings for rock cores prior to installing rock anchors shall be considered incidental to this bid item, see section

00 31 32.13 , SUBSURFACE DRILLING AND SAMPLING.

1.1.5.1 Payment

Full compensation for all labor, equipment and materials for the removal and disposal of pre-cast concrete blocks and test borings for rock cores shall be compensated in this bid item. Included in this bid item including the removal and disposal of the blocks are hauling, crushing (if applicable), removal and disposal of any foreign debris (trash, rubble, etc.) that may have entered the Chicago Lock Chamber before or during construction. Contractor is required to perform an existing condition survey prior to the start of this activity. Payments will be made monthly as progress payments based on the completion status per the approved cost loaded construction schedule as defined in contract Section 01 32 01.00 10 , PROJECT SCHEDULE. Final payment will be made after the construction season has ended and the chamber is free of all debris pre-cast concrete floor panels within the respective area for the CLIN. There shall be a 10% retention of total bid item price withheld until a final multibeam sidescan survey is taken by the contractor at the end of final construction for COR to approve final conditions.

1.1.5.2 Unit of Measure

Unit of Measure: JOB

1.1.6 Performance and Payment Bonds (Base Bid Item 0004, Option 1 Bid Item 0007, and Option 2 Bid Item 0010)

1.1.6.1 Payment

Payment will be made for the performance and payment bonds that are required as part of this contract. The Government will pay the Contractor's bid price after receiving evidence of payment (paid invoice) from the bonding company or agency.

SECTION 01 22 00.00 10 PAGE 5

1.1.6.2 Unit of Measure

Unit of Measure: LOT

1.2 UNIT PRICE PAYMENT ITEMS

Payment items for the work of this contract on which the contract unit price payments will be made are listed in the BID SCHEDULE and described below. The unit price and payment made for each item listed constitutes full compensation for furnishing all plant, labor, materials, and equipment, and performing any associated Contractor quality control, environmental protection, meeting safety requirements, tests and reports, and for performing all work required for each of the unit price items.

Notwithstanding the requirements of any other specification, drawing, or clause in this Contract, the Government will only pay for the actual quantities of the unit price items incorporated into the work, up to the estimated Contract Quantities listed on the BIDDING SCHEDULE. Any quantity placed in excess of the Contract Quantity without first receiving a Contract Modification increasing the estimated quantity of that unit price item shall be at the Contractor's expense. The Contractor is responsible for notifying the Government of the need to increase the contract quantity of a line item at least seven calendar days before the item is needed.

1.2.1 Concrete Re-Surface with Bullnose (Base Bid Item 0001AC, and Option 1 Bid Item 0005AC)

Wall resurfacing for the Chicago Lock Chamber shall be restored with Cast-In-Place (CIP) concrete using epoxy anchors to ensure bonding and stability to the existing wall. The existing steel bullnose shall stay in place. The plans detail the required depth of concrete to be demolished.

Ensure all demolition is in accordance with Section 03 01 00 , CONCRETE DEMOLITION AND REHABILITATION. Follow all provisions in Section 03 30 53 , CAST-IN-PLACE CONCRETE for CIP concrete. Installation of new tile depth gauges and framing concrete around mooring hooks shall be considered incidental to this bid item.

1.2.1.1 Payment

Full compensation for all labor, equipment and materials for demolition and disposal of existing concrete wall, resurfacing using CIP concrete, installation of epoxy anchors, and painting of existing steel bullnose.

1.2.1.2 Measurement

The measurement for this payment item shall be based on linear feet of wall resurfacing.

1.2.1.3 Unit of Measure

Unit of Measure: Linear Feet (LF)

1.2.2 New Steel Ladders (Base Bid Item 0001AD, and Option 1 Bid Item

0005AD)

Steel ladder at the Chicago Lock Chamber shall be replaced in their entirety and fastened to the chamber walls. Follow provisions in Section

05 50 15 , CIVIL WORKS FABRICATION.

SECTION 01 22 00.00 10 PAGE 6

1.2.2.1 Payment

Payment will be made at the contract job price for the demolition and removal of existing ladder rungs. Payment shall also be made for fabrication, installation of new steel ladders on the lock walls as shown on the drawings and described in Section 05 50 15 , CIVIL WORKS FABRICATION. Payment shall include studs, grout, and other incidentals necessary for installation of the ladders. Payment constitutes full compensation for all plant, labor, materials, equipment, tools, and incidentals necessary to complete the work. Each set of ladder rungs much be fully replaced to receive payment.

1.2.2.2 Measurement

The measurement for this payment item shall be based on the set of ladder rungs replaced which are called out in the drawings to be installed.

1.2.2.3 Unit of Measure

Unit of Measure: Each (EA)

1.2.3 New Steel Bullnose (Option Bid Item 0005AE)

The existing steel bullnose does not exist in sections in the extents of phase 1 & 2. The Contractor shall furnish, fabricate, and install steel bullnose for these sections to match the existing bullnose along the rest of the lock chamber. Follow provisions in Section 05 50 15 , CIVIL WORKS FABRICATION for steel bullnose.

1.2.3.1 Payment

Full compensation for all labor, equipment and materials for the demolitions of all concrete currently installed in place of steel bullnose, fabrication and installation for bullnose along the lock edge.

1.2.3.2 Measurement

The measurement for this payment item shall be based on linear feet of steel bullnose installed.

1.2.3.3 Unit of Measure

Unit of Measure: Linear Feet (LF)

1.2.4 Reinforced Concrete Walkway (Base Bid Item 0002AA, and Option 1 Bid Item 0006AA)

Reinforced concrete walkway along the walls of the Chicago Lock Chamber shall be demolished and then replaced with new CIP concrete. The drawings indicate the extents of the demolition and new walkway. Ensure all demolition is in accordance with Section 03 01 00 , CONCRETE DEMOLITION AND REHABILITATION. Follow all provisions in Section 03 30 53 , CAST-IN-PLACE CONCRETE for CIP concrete. Installation of new life circle enclosures and furnishing of new life circles shall be considered incidental to this bid item.

SECTION 01 22 00.00 10 PAGE 7

1.2.4.1 Payment

Full compensation for all labor, equipment and materials for the demolition and disposal of existing concrete walkway, placing new CIP concrete walkway, reinforcement, any grading as necessary, and all its components which are shown in the drawings.

1.2.4.2 Measurement

The measurement for this payment item shall be based on linear feet of walkway installed.

1.2.4.3 Unit of Measure

Unit of Measure: Linear Feet (LF)

1.2.5 Re-Install Yellow Cleats (Base Bid Item 0002AB, and Option 1 Bid Item 0006AB)

The yellow cleats located along the Chicago Lock Chamber walls shall be temporarily removed during resurfacing of the reinforced concrete walkway. The yellow cleats shall then be re-installed in the original locations.

1.2.5.1 Payment

Full compensation for all labor, equipment and materials for the temporary removal and storage of the yellow cleats and re-installation in their original location after the reinforced concrete walkway has been completed.

1.2.5.2 Measurement

The measurement for this payment item shall be based on the number of yellow cleats that are re-installed.

1.2.5.3 Unit of Measure

Unit of Measure: Each (EA)

1.2.6 New Red Cleats (Base Bid Item 0002AC, and Option 1 Bid Item 0006AC)

The red cleats located along the Chicago Lock Chamber walls shall be demolished during resurfacing of the reinforced concrete walkway. New solid steel red cleats shall furnished re-installed in the original locations. Follow all provisions in Section 05 50 15 , CIVIL WORKS

FABRICATION.

1.2.6.1 Payment

Full compensation for all labor, equipment and materials for demolition of the red cleats, furnishing new solid steel red cleats, and installation in their original location after the reinforced concrete walkway has been completed.

1.2.6.2 Measurement

The measurement for this payment item shall be based on the number of red cleats that are installed

SECTION 01 22 00.00 10 PAGE 8

1.2.6.3 Unit of Measure

Unit of Measure: Each (EA)

1.2.7 New Check Post (Base Bid Item 0002AD, and Option 1 Bid Item 0006AD)

Existing check posts at the Chicago Lock Chamber shall be demolished and new checkposts shall be furnished and installed at the indicated locations at the drawings. Follow all provisions in Section, 05 50 15 , CIVIL WORKS

FABRICATION.

1.2.7.1 Payment

Full compensation for all labor, equipment and materials for demolition and disposal of the check posts, furnishing check posts, and installation in the indicated locations after the reinforced concrete walkway has been completed.

1.2.7.2 Measurement

The measurement for this payment item shall be based on number of check posts installed.

1.2.7.3 Unit of Measure

Unit of Measure: Each (EA)

1.2.8 New Railing (Base Bid Item 0002AE, and Option 1 Bid Item 0006AE)

New railing shall replace existing railing at the Chicago Lock Chamber.

The old railing shall be un-installed, removed, and stored in location determined by COR. New modular railing shall be furnished and installed at the indicated locations in the drawings. Follow all provisions in Section, 05 50 15 , CIVIL WORKS FABRICATION.

1.2.8.1 Payment

Full compensation for all labor, equipment and materials for un-installation, removal, and storage of the existing railings, furnishing new modular railing, and installation in the indicated locations after the reinforced concrete walkway has been completed.

1.2.8.2 Measurement

The measurement for this payment item shall be based on linear feet of new railing installed.

1.2.8.3 Unit of Measure

Unit of Measure: Linear Feet (LF)

1.2.9 Dredging (Base Bid Item 0003AE, and Option 2 Bid Item 0008AC)

Dredging method is to be determined by the contractor. Sediment disposal method is at the discretion of the contractor. The dredging areas are shown in the drawings. Submit dredging operation plan for selected dredging process in accordance with Section 35 20 23 DREDGING. The contractor shall dredge to proposed grade within all areas designated in

SECTION 01 22 00.00 10 PAGE 9

the drawings to receive payment.

1.2.9.1 Payment

Payment for dredging will be made at the contract unit price per square foot (SF) of areas indicated in the drawings. Payment constitutes all labor, equipment and materials necessary to perform this work. The unit price for dredging also includes costs for characterizing, removing, dewatering, transportation, sediment and water disposal, tipping fees or disposal fees, and all incidental costs for dredging and disposing of the sediment and entrained water. Contractor shall perform multi-beam check survey post dredge activity. Contractors final payment will be based on the final quality assurance dredge multi-beam survey performed by the Government to verify that sufficient grade has been achieved to facilitate construction of the tremie concrete slab system within specified constraints.

1.2.9.2 Measurement

The measurement for this payment item shall be based on the total square footage (SF) of area dredged as indicated in the drawings.

Method of Measurement: The Contractor shall submit p Post-dredge quality assurance multi-beam hydrosurvey which showverifies the depth of the bottom of the surface to an accuracy of +/- . 051 inch foot .

1.2.9.3 Unit of Measure

Unit of Measure: Square Feet (SF)

1.2.10 Rock Anchors (Base Bid Item 0003AF, and Option 2 Bid Item 0008AD)

Rock anchors shall be installed into bedrock to secure new CIP floor.

Anchors will be fastened onto concrete floor as indicated in the drawings.

Follow all provisions in accordance with Section 31 63 33 , ROCK ANCHORS.

Installation of test anchor(s) shall be considered incidental to this bid item.

1.2.10.1 Payment

Full compensation for all labor, equipment and materials for anchor fabrication, bolts, plates, nuts, drilling, and any other ancillary work required to furnish and install anchors in bedrock securing the newly placed concrete floor.

1.2.10.2 Measurement

The measurement for this payment item shall be based on number of rock anchors installed.

1.2.10.3 Unit of Measure

Unit of Measure: Each (EA)

1.2.11 Aggregate Base (Base Bid Item 0003AG, and Option 2 Bid Item 0008AE)

Place…