W912P821B0066_Am 0001 (SAM) 08-26-21.pdf

(ED 20-036)

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

The subject solicitation for Mississippi River and Tributaries Project (MR&T), Atchafalaya Basin Levee District (ABLD), MRL Armoring Near Morganza, Pointe Coupee Parish, Louisiana (ED 20-036) is hereby amended as follow s:

1.) Provides revisions and Government responses to bidder questions on the attached continuation pages.

The bid submission deadline of 3 September 2021, 11:00AM, local time, as w ell as the virtual bid opening date and time of 3 September 2021, 11:00AM, local time, remains unchanged.

***PLEASE ACKNOWLEDGE THIS AMENDMENT AND SUBMIT WITH YOUR BID***

1. CONTRACT ID CODE PAGE OF PAGES

1 7

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

16C. DATE SIGNED

BY 26-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 W912P821B0066

X 9B. DATED (SEE ITEM 11)

04-Aug-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 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 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

26-Aug-2021

CODE

CONTRACTING DIV- CHIEF

7400 LEAKE AVENUE, ROOM 172

NEW ORLEANS LA 70118-3651

W912P8 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912P821B0066

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

Bidders Questions and Government Responses

1. Bidder Question: We cannot locate the specified NAICS for this solicitation. Please clarify the NAICS for this solicitation.

USACE Response: As published on August 4, 2021, on the www.SAM.gov website under the Notice ID number (W912P821B0066), the NAICS code assigned for this requirement is 237990 – Other Heavy and Civil Engineering Construction.

2. Bidder Question: Paragraph 3(i) of specification section 01100 requires a full-time SSHO. Please clarify if the SSHO position is a stand-alone position, or if the SSHO can have collateral duties.

USACE Response: The SSHO position is a stand-alone position and cannot have any collateral duties. See Specifications Section 01100, Paragraph (i).

3. Bidder Question: Section 15, High River Work Restrictions, of specification section 01100 only allows work to proceed when the Carrollton Gage in New Orleans is below +11.0 feet. Please provide the corresponding elevation that contract work is required to cease using the Red River Landing Gage hydrographs shown on Drawing H-01, which more closely follows the contract elevations.

USACE Response: All contracts have to abide by the gage requirement of 11 ft. at the Carrollton Gage. There is no correlation between the Carrollton and Red River Landing gages. Both the Carrollton and Red River Landing Gage Hydrographs have been provided in the plans. The contractor will have to come up with their own correlation between the two gages.

4. Bidder Question: Drawing sheets C-14 and C-15 reference closed cell ACB mats. However, paragraph 2.1 of specification section 35 31 19.20 references open cell ACB mats. Please clarify the intent for ACB mats.

USACE Response: Closed Cell ACB mats will be used in the contract. Specifications Section 35 31 19.20, Articulating Concrete Blocks (ACB) will be revised to clarify this issue.

5. Bidder Question: Are there any load limits for the spillway structure bridges on LA Hwy 15 at the borrow and stockpile area locations?

USACE Response: The load limits for the bridges are in accordance with DOTD regulations as they are state highways.

6. Bidder Question: Note 4 on Drawing C-19 states to waste the top 2’ of borrow area.

Please clarify the following:

a. Is the wasted material to be trucked offsite or placed onsite?

b. If wasted material is to remain onsite, please clarify where and to what height the wasted material is to be relocated.

USACE Response: Wasted material shall be placed in accordance with Specification Section 31 23 00.00 12, Paragraph 3.2.2 “Wasted Materials”.

7. Bidder Question: Is water available to the contractor at the site or USACE facilities in the area? If so, is there a fee for utilization of water?

USACE Response: No, there is no known water services available. USACE facilities cannot provide water.

8. Bidder Question: Section 32 15 00.00 12 paragraph 1.4.2 Ramp Travel Way Transition stated payment will be include in the contract unit price per square yard for “Ramp Paving”; however, Section 35 43 38.00 12 paragraph 1.3.1 Ramp Paving states Crushed stone transitions shall be measured and paid for in accordance with section 32 15 00.00 12 “Crushed Stone”. Please clarify if the placement for this stone is measured for payment under the ACB Subbase item CLIN 0012.

USACE Response: The crushed stone for ramp travel way transitions will not be measured and will be paid for under the Ramp Paving item CLIN 0018 because this amount of stone is minimal.

9. Bidder Question: There are piles of rip rap mixed with a significant amount of dirt between station 1355+00 and 1348+00. Will the rip rap removed to stockpile need to be clean and separated from dirt and unsuitable material or will it all be removed together and included in the vehicular measure for that item of work?

USACE Response: No, the rip rap does not need to cleaned but should be separated from unsuitable material as best as possible and will be measured as per Specifications Section 31 23 00.00 12, Pargragh1.3.5 “Riprap Removal, Hauling and Stockpiling”.

10. Bidder Question: There are some piles of unsuitable material near station 328+00, will this material have to be removed and if so under what item and how will it be quantified and paid for?

USACE Response: It is assumed the question is referring to the pile of material at the toe of the South Guide Levee near station 328+00. The material is outside the limits of work for ACB Mats, but within the Right-of-Way limits as shown on Sheet C-04. The material does not need to be removed unless it’s required by the Contractor to successfully perform the work. The removal and payment of unsuitable material shall be in accordance with Specifications Section 31 11 00.00 12 “Clearing and Grubbing”.

11. Bidder Question: There is an access road on top of the potato ridge levee, station 333+94 to station 275+13.60, can it be occupied by equipment during construction.

USACE Response: The access road is on top of the South Guide Levee of the Morganza Forebay (not Potato Ridge). It may be occupied by equipment during construction to place ACB mats. Equipment shall be moved off of road at the end of the day to maintain access.

12. Bidder Question: Across from the entrance to the staging area shown on plan sheet C-07 there is a gated access to the north forebay levee leading ultimately to the area of construction station 1012+21.24 to station 2033+50 shown on plan sheet C-01. Can this gate and the access road be utilized for occasional use?

USACE Response: No, this gate and access cannot be used for access to the project area.

13. Bidder Question: Drawing C-08 shows Settlement Gages placed at the levee cut sections. Is the new embankment work to be performed at the same locations as the levee cut sections? Please clarify the intent of the levee cut and new levee embankment operations.

USACE Response: Levee cut is to repair a levee slide. New levee section is to repair erosion along the levee. So, the areas where the cut is to remove the slide and restore the section to grade shown on levee sections require settlement gages.

14. Bidder Question: Will payment for ACB mat materials stored onsite or at laydown area be allowed?

USACE Response: No, payment will only be for ACB mats installed. Specification Section 35 31 19.20, Paragraph 1.2 refences measured and payment for ACBs by the square yard satisfactorily installed.

15. Bidder Question: Drawing sheet C-09 only indicates mowing on one side of the levee. Please clarify the limits of maintenance mowing that the contractor will be required to perform for this contract.

USACE Response: Limits of maintenance mowing shall be in accordance with Specification Section 32 92 19.04 12, Paragraph 3.7 “MOWING”.

16. Bidder Question: Is electrical connection available for contractor use and field offices at the staging area?

USACE Response: Overhead electrical lines are nearby. The contractor can contact the electrical company in the area for services.

SPECIFICATIONS:

SECTION 35 31 19.20

Page 3, paragraph 1.2 MEASUREMENT AND PAYMENT. Delete this paragraph in its entirety and substitute the revised paragraph as follows:

“1.2 MEASUREMENT AND PAYMENT

Measurement of Articulating Concrete Blocks (ACB) will be made by the square yard satisfactorily installed. Payment will be made at the contract unit price per square yard for "Articulated Concrete Blocks". Price and payment shall constitute full compensation for furnishing all material, labor, and equipment; and performing all operations necessary to complete the installation of the ACBs; excavating termination trenches, furnishing and installing closed cell ACBs, filling the voids with sand, securing cable fasteners, installing soil anchors, embedding blocks at the top and bottom trenches, backfilling excavated trenches; engineering services and product testing; cutting blocks and filling the voids with sand and/or mortar (at gaps as shown on contract drawings); and other work incidental thereto; all as specified herein and as shown on the contract drawings.”

Page 6, paragraph 2.1 ARTICULATING CONCRETE BLOCK. Delete this paragraph in its entirety and substitute the revised paragraph as follows:

“2.1 ARTICULATING CONCRETE BLOCK

Submit descriptive technical data on the blocks, cables, cable fittings, and soil anchors. Include all material properties specified under paragraph this section.

Catalog cuts, technical data sheets, or test data shall be submitted showing that the products meet the specifications. The submittal shall also include a copy of any standard manufacturer's warranties for the products. The ACB's (closed cell) shall meet the following criteria:

TABLE 1. ACB Requirements

Criteria Required Value Test Method

Matrix Assembly:

Thickness, minimum 4 inches N/A Net Weight/Area, min., 37 psf Note a.

Critical Shear Stress, minimum 3.5 psf FHWA RD-89-199 Critical Velocity, minimum 15 ft/sec FHWA RD-89-199 Curvature Radius, maximum 3 feet Note b.

Surface Void Area Ratio 8 - 15% Note c.

Drainage Correction Factor (DCF) 8% - 15% Note d.

Block/Filter Fabric Interface

Friction Angle 35 degrees Note e.

Note a. Determine the weight of the mattress per unit area with the nominal joint spacing, in a non-submerged condition.

Note b. The curvature radius shall be indicative of the ability of the assembled mattress to conform to one dimensional sub-grade curves without binding, such as for anchor trenches and swales. The curvature radius shall be demonstrated, if requested by the Contracting Officer.

Note c. The surface void area ratio shall be determined at the visible (with filled voids) surface of the blocks, with the joints spaced in a neutral position (50 percent) and shall be expressed as a percentage of the gross mat area. The void area shall include area between the blocks and closed cells within the block.

Note d. The drainage correction factor shall be the minimum void area ratio (usually taken at the base of the blocks), with the joints spaced in a neutral position (50 percent freeplay in each direction) and shall be expressed as a percentage of the gross mat area.

Note e. The concrete surface shall be sufficiently rough to prevent sliding of the blocks on the filter fabric. The interface friction must be matched with the selected block and filter fabric combination and shall be included with the ACB and Filter Fabric Data submittal. The block/filter fabric interface friction angle shall be demonstrated, if requested by the Contracting Officer.”

Page 8, paragraph 2.1.2 Matrix Assembly - Cabled Systems. Delete this paragraph in its entirety and substitute the revised paragraph as follows:

“2.1.2 Matrix Assembly - Cabled Systems

Cable tied concrete block shall be interconnected by flexible cables running through the blocks. Each block shall be penetrated by a cable that allows articulation of the blocks but restrains removal of individual blocks. Articulating concrete block, cables, and fittings shall be fabricated into mattresses at the manufacturer's plant. The assembled mattresses shall be closed cell as shown in the drawings. The Contracting Officer reserves the right to accept or reject any proposed equal cellular concrete mattress system for reasons including but not limited to previous performance record, appropriate and applicable testing, hydraulic performance characteristics, and qualified technical support.”

DRAWINGS:

SHEET IDENTIFICATION. Delete drawing C-15 in its entirety and substitute the attached revised drawing SHEET IDENTIFICATION No. C-15.

6" THK. CONCRETE

PLACED AT 1/2 DEPTH

4x4 W9.5 x W9.5 WWF

WIDTH VARIES

(SEE SHEET C-17 FOR DETAILS)

CONCRETE CUTOFF WALL

SEE NOTE 2

2. C/L OF NEW RAMP TO BE ALIGNED WITH C/L OF EXISTING RAMP.

CONCRETE RAMP AND ACB.

STONE MAY NEED TO BE ADDED TO CREATE SMOOTH TRANSITION FROM

CONSTRUCT SMOOTH CRUSHED STONE TIE-IN WITH EXISTING GROUND.

1. THE CONTRACTOR SHALL STRADDLE THE EXISTING RAMP AND

NOTES:

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CUTOFF WALL

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10. DETAIL APPLIES TO THE EXISTING RAMP AT THE FOLLOWING LOCATIONS: SEE SHEET C-01

DETAIL SHEET C-17.

MATCH THE WIDTH OF NEW CONCRETE. SEE "END OF CONCRETE RAMP CUTOFF WALL"

EXTEND APPROX. 5 FEET FROM THE END OF NEW CONCRETE. THE WIDTH SHALL

NEW CONCRETE TO THE EXISTING GROUND SURFACE. THE TRANSITION SHALL

9. PROVIDE A SMOOTH TRANSITION (CRUSHED STONE) FROM EACH END OF THE

TO A 1V ON 3H SLOPE AND TIE-IN EXISTING EMBANKMENT SIDE SLOPES.

HEIGHT ABOVE EXISTING GROUND. THE EMBANKMENT SHALL BE SPREAD EVENLY

THE CONCRETE RAMP CUTOFF WALLS ON BOTH SIDES TO REDUCE THE CONCRETE

8. PROVIDE AND PLACE COMPACTED BACKFILL/EMBANKMENT MATERIAL AGAINST

SLOPES FOR SMOOTH TIE-IN WITH THE NEW RAMP ALIGNMENT.

7. THE CONTRACTOR SHALL GRADE THE EXISTING EMBANKMENT SIDE

JOINTS SHALL BE IN ACCORDANCE WITH DETAILS AS SHOWN ON SHEET C-15.

6. EXPANSION JOINTS SHALL BE EVENLY SPACED AT 10-FOOT INTERVALS. EXPANSION

RAMP C/L WITH THE C/L WITH THE APPROXIMATE CENTERLINE OF EXISTING RAMP.

5. THE NEW CONCRETE RAMP SHALL BE FIELD ADJUSTED TO ALIGN THE NEW

OF RAMP WORK.

TO THE CONTRACTING OFFICER FOR APPROVAL, PRIOR TO BEGINNING

LOCATION OF EXPANSION AND CONTRACTION JOINTS, REBAR, AND WWF

4. THE CONTRACTOR SHALL SUBMIT A RAMP "LAYOUT PLAN" DEPICTING THE

SHOWN ON THE PLAN VIEW, SHEET C-01 AND IN DETAILS ON SHEET C-15.

3. ALL CONCRETE RAMP EDGES SHALL HAVE CONCRETE CUTOFF WALLS AS

TRANSITON BETWEEN CONCRETE RAMP AND ACB.

ADDITONAKL STONE MAY NEED TO BE PLACED TO CREATE SMOOTH

SURFACING IN PREPERATION FOR PLACEMENT OF CONCRETE.

STONE SURFACE. THE CONTRACTOR SHALL GRADE EXISTING RAMP

2. THE NEW CONCRETE RAMP SHALL OVERLAY EXISTING CRUSHED

NEAR THE LEVEE TOE.

ANCHOR TRENCH NEAR THE CROWN TO THE ACB ANCHOR TRENCH

1. THE RAMP TRAVEL WAY SHALL BE CONCRETE PAVED FROM THE ACB

NOTES:

(SEE C-17 FOR DETAILS)

CONCRETE CUTOFF WALL

(SEE NOTE BELOW)

CRUSHED STONE

EXISTING RAMP

SEE NOTE 3

ACB ANCHOR TRENCH NEAR LEVEE CROWN

CONCRETE CUTOFF WALL

ACB ANCHOR TRENCH NEAR LEVEE TOE

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5' CRUSHED STONE TRANSITION, END OF NEW

EXISTING

TO MATCH

RAMP WIDTH

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NOT TO SCALE

TYPICAL RAMP CONCRETE PAVING AND ACB TIE-IN

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RAMP - SECTION

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ACB MAT

CLOSED CELL

GROUND

EXISTING

CONCRETE ON EXISTING RAMP, SEE NOTE 9

5' CRUSHED STONE TRANSITION, END OF NEW

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