A22_Solicitation_W912EE21B0002_Amendment_0003.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

Referenced Solicitation No. W912EE21B0002 for Humphreys County, MS, Belzoni Bank Stabilization, FC/MR&T Main Stem Maintenance, PL 114-254; Yazoo River Basin, Yazoo River Levees is amended as follows:

PLEASE SEE CONTINUATION PAGE FOR SUMMARY OF CHANGES.

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY 01-Jun-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 W912EE21B0002

X 9B. DATED (SEE ITEM 11)

06-May-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

01-Jun-2021

CODE

VICKSBURG CONTRACTING OFFICE

4155 CLAY ST

VICKSBURG MS 39183-3435

W912EE 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EE21B0002

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

SUMMARY OF CHANGES

The SF 1442 has been revised and replaced in it’s entirety.

SPECIFICATIONS: Section 3101 00.00 09 and Section 35 21 20.00 09 are revised and replaced.

Specifications revised by this amendment have the notation "Revised by Amendment 0003" at the bottom of the page. Text added by this amendment is shown as underlined. Text deleted by this amendment is shown as overstruck.

W807PM10975183

HUMPHREYS COUNTY, MS

BELZONI BANK STABILIZATION

FC/MR&T MAIN STEM MAINTENANCE, PL 114-254

YAZOO RIVER BASIN, YAZOO RIVER LEVEES.

Description of Work: The work consists of furnishing all plant, labor, materials and equipment, and constructing the bank stabilization and associated work on the Yazoo River in Humphreys County, Mississippi. The principal features of work include clearing and grubbing, debris removal, excavation, backfill, R200 riprap, erosion control, storm water prevention and environmental protection.

THIS SOLICITATION CONTAINS DEFINITIVE RESPONSIBILITY CRITERIA AS PRECONDITION TO AWARD

(SEE THE DETERMINATION OF RESPONSIBILITY REQUIREMENT PAGE BELOW).

The estimated value of the proposed work is between $1,000,000 and $5,000,000.

X

SHELIA R BRADLEY (601) 631-7243

NOTE: In sealed bid solicitations "offer" and "offeror" mean "bid" and "bidder".

10. THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS

NEGOTIATED

6 May 2021

(RFP)

(IFB)

CALL:

B. TELEPHONE NO. (Include area code) (NO COLLECT CALLS)

SEE SPECIAL NOTICES TO BIDDERS

2. TYPE OF SOLICITATION

SEALED BID

3. DATE ISSUED

9. FOR INFORMATION A. NAME

SOLICITATION

NSN 7540-01-155-3212 1442-101 STANDARD FORM 1442 (REV. 4-85)

Prescribed by

GSA

FAR (48 CFR) 53.236-1(e)

11. The Contractor shall begin performance within 10 calendar days and complete it within 200 calendar days after receiving award, X Notice to proceed. This performance period is X mandatory, negotiable. ( 00.80.00.00.09

12 A. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS?

(If "YES," indicate within how many calendar days after award in Item 12B.)

X

YES NO

SOLICITATION, OFFER,

AND AWARD

(Construction, Alteration, or Repair)

IMPORTANT - The "offer" section on the reverse must be fully completed by offeror.

4. CONTRACT NO.

7. ISSUED BY CODE

VICKSBURG CONTRACTING OFFICE

4155 CLAY ST

VICKSBURG MS 39183-3435

W912EE

PAGE

CODE

(Title, identifying no., date):

12B. CALENDAR DAYS

5. REQUISITION/PURCHASE REQUEST NO. 6. PROJECT NO.

8. ADDRESS OFFER TO (If Other Than Item 7)

(601) 631-7261 FAX: TEL: TEL: FAX:

1. SOLICITATION NO.

W912EE21B0002

13. ADDITIONAL SOLICITATION REQUIREMENTS:

A. Sealed offers in original and 1 copies to perform the work required are due at the place specified in Item 8 by 2:00 PM. (hour) local time 08 Jun 2021 (date). If this is a sealed bid solicitation, offers must be publicly opened at that time. Sealed envelopes containing offers shall be marked to show the offeror's name and address, the solicitation number, and the date and time offers are due.

B. An offer guarantee X is, is not required.

C. All offers are subject to the (1) work requirements, and (2) other provisions and clauses incorporated in the solicitation in full text or by reference.

D. Offers providing less than 60 calendar days for Government acceptance after the date offers are due will not be considered and will be rejected.

"Revised by Amendment 0003"

20B. SIGNATURE

(REV. 4-85) STANDARD FORM 1442 BACK

TO SIGN

NSN 7540-01-155-3212

SOLICITATION, OFFER, AND AWARD (Continued) Page 2 (Construction, Alteration, or Repair)

CODE FACILITY CODE

17. The offeror agrees to perform the work required at the prices specified below in strict accordance with the terms of this solicitation, if this offer is accepted by the Government in writing within ________ calendar days after the date offers are due.

the minimum requirements stated in Item 13D. Failure to insert any number means the offeror accepts the minimum in Item 13D.)

AMOUNTS SEE SCHEDULE OF PRICES

18. The offeror agrees to furnish any required performance and payment bonds.

19. ACKNOWLEDGMENT OF AMENDMENTS

(The offeror acknowledges receipt of amendments to the solicitation -- give number and date of each)

AMENDMENT NO.

DATE

20A. NAME AND TITLE OF PERSON AUTHORIZED TO SIGN

OFFER (Type or print)

AWARD (To be completed by Government)

21. ITEMS ACCEPTED:

SEE SCHEDULE

22. AMOUNT 23. ACCOUNTING AND APPROPRIATION DATA

24. SUBMIT INVOICES TO ADDRESS SHOWN IN ITEM

(4 copies unless otherwise specified)

CODE

(Insert any number equal to or greater than

20C. OFFER DATE

25. OTHER THAN FULL AND OPEN COMPETITION PURSUANT TO

10 U.S.C. 2304(c) 41 U.S.C. 253(c)

CODE 27. PAYMENT WILL BE MADE BY: 964145

US ARMY CORPS OF ENGRS FINANCE CENTER

5722 INTEGRITY DRIVE

MILLINGTON TN 38054-5005

26. ADMINISTERED BY

VICKSBURG CONTRACTING OFFICE

4155 CLAY STREET

VICKSBURG, MS 39183-3435

(Include ZIP Code)14. NAME AND ADDRESS OF OFFEROR 15. TELEPHONE NO. (Include area code)

See Item 14

(Include only if different than Item 14)16. REMITTANCE ADDRESS

30B. SIGNATURE

29. AWARD (Contractor is not required to sign this document.)

document and return _______ copies to issuing office.) Contractor agrees Your offer on this solicitation, is hereby accepted as to the items listed. This award con-to furnish and deliver all items or perform all work, requisitions identified summates the contract, which consists of (a) the Government solicitation and on this form and any continuation sheets for the consideration stated in this your offer, and (b) this contract award. No further contractual document is contract. The rights and obligations of the parties to this contract shall be necessary.

governed by (a) this contract award, (b) the solicitation, and (c) the clauses, representations, certifications, and specifications or incorporated by refer-ence in or attached to this contract.

30A. NAME AND TITLE OF CONTRACTOR OR PERSON AUTHORIZED 31A. NAME OF CONTRACTING OFFICER (Type or print)

30C. DATE

(Type or print)

TEL: EMAIL:

31B. UNITED STATES OF AMERICA 31C. AWARD DATE

BY

CONTRACTING OFFICER WILL COMPLETE ITEM 28 OR 29 AS APPLICABLE

(Contractor is required to sign this28. NEGOTIATED AGREEMENT

(Must be fully completed by offeror) OFFER

"Revised by Amendment 0003"

W912EE-21-B-0002

SECTION TABLE OF CONTENTS

DIVISION 31 - EARTHWORK

SECTION 31 01 00.00 09

GENERAL SITEWORK

PART 1 GENERAL

1.1 SCOPE OF WORK

1.2 WORK TO BE PERFORMED

1.3 SUSPENSION OF WORK

1.4 STAGE LIMITATIONS

1.4.1 High Water Stages

1.4.2 Extension of Contract Period Time

1.5 RELOCATION OF EXISTING STRUCTURES AND UTILITIES

PART 2 PRODUCTS (Not Applicable)

PART 3 EXECUTION (Not Applicable)

-- End of Section Table of Contents --

SECTION 31 01 00.00 09 Page 1 Revised By Amendment 0003

SECTION 31 01 00.00 09

GENERAL SITEWORK

PART 1 GENERAL

1.1 SCOPE OF WORK

These specifications provide for furnishing all plant, labor, materials and equipment, and performing all work in strict accordance with the specifications, drawings, and schedules. Principal features of work include clearing, grubbing, debris removal, excavation, erosion control, and all other work associtated with constructing the stone revetment, longitudinal peaked stone dikes, transverse stone dikes and stone tiebacks at the locations shown on the drawings, on the banks and channel of the Yazoo River in the vicinity of Belzoni, in Humphreys County, Mississippi, within a relatively short construction period. The work covered by these specifications requires steady and uninterrupted progress during construction. The Contractor shall diligently prosecute the work and provide the necessary equipment, a skilled and experienced crew, and a regular and well-balanced supply of materials to ensure uniform and continuous progress once construction has been started.

1.2 WORK TO BE PERFORMED

The work to be performed is indicated on the drawings and includes the following types of work:

a. Clearing, grubbing and tree removal, clearing and snagging, debris removal, and excavation.

b. Constructing stone revetment.

c. Constructing a longitudinal peaked stone dike.

d. Constructing transverse stone dikes and stone tiebacks.

e. Erosion control.

1.3 SUSPENSION OF WORK

Except as provided in paragraph STAGE LIMITATIONS and Section 00 80 00.00 09 SPECIAL CONTRACT REQUIREMENTS, paragraph COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK, the Contractor will not be permitted to suspend work without a request to suspend work or remove equipment from the location of work after the work has been started under this contract without prior approval of the Contracting Officer.

1.4 STAGE LIMITATIONS

1.4.1 High Water Stages

Because of the "flashy" nature of the Yazoo River, high water stages can be expected to occur intermittently depending on basin rainfall.

Interruptions and/or delays to construction may occur when high water

SECTION 31 01 00.00 09 Page 2 stages and/or velocities make construction operations impracticable. The Contracting Officer reserves the right to delay operations whenever, in his opinion, high water stages and/or velocities make construction operations impracticable.

1.4.2 Extension of Contract Period Time

As provided in the Contract Clause DEFAULT, the time stated for completion of the work will be extended to such extent that the work is delayed due to high water stages and/or velocities , or such extent that the work is delayed due to low water stages causing the river to be non navigable . If part of the work is delayed or interrupted by high water stages and/or velocities, or non-navigable low water stages, the time stated for completion will be extended to such extent as final completion of all work is delayed as a result of the partial delay or interruption. The Contractor is responsible for any additional costs which may occur during or as a result of excusable delays due to those extensions or interruptions.

1.5 RELOCATION OF EXISTING STRUCTURES AND UTILITIES

Existing structures, power poles, telephone poles, overhead telephone and powerlines, sewer lines, manhole covers, that are within the limits of the work will not be relocated by the Government. The Contractor will be required to work around those items, except as otherwise specified in Section 01 00 00.00 09 GENERAL CONTRACT REQUIREMENTS, paragraph PUBLIC

UTILITIES.

(See also the Contract Clause ACCIDENT PREVENTION.)

PART 2 PRODUCTS (Not Applicable)

PART 3 EXECUTION (Not Applicable)

-- End of Section --

SECTION 31 01 00.00 09 Page 3

SECTION TABLE OF CONTENTS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

SECTION 35 21 20.00 09

STONE

PART 1 GENERAL

1.1 REFERENCES

1.2 SCOPE OF WORK

1.3 GOVERNMENT TESTING AND STUDIES

1.3.1 Stone

1.3.1.1 General

1.3.1.2 Sources

1.4 SUBMITTALS

PART 2 PRODUCTS

2.1 STONE

2.1.1 General

2.1.2 Evaluation Testing

2.1.3 Gradation Test

PART 3 EXECUTION

3.1 STONE PLACEMENT

3.2 PLACEMENT CONTROL

3.2.1 Alignment Control

3.2.2 Distance Control

3.2.3 Depth Finder

3.2.4 Nonpermitted Devices

3.3 TESTS

3.3.1 General

3.3.2 Reporting

3.3.3 Standard Test Method for Gradation of Riprap and Graded Stone

-- End of Section Table of Contents --

SECTION 35 21 20.00 09 Page 1

SECTION 35 21 20.00 09

STONE

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C127 (2015) Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate

ASTM C295/C295M (2019) Standard Guide for Petrographic Examination of Aggregates for Concrete

ASTM D3740 (2019) Minimum Requirements for Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

ASTM D4992 (2014; E 2015) Evaluation of Rock to be Used for Erosion Control

ASTM D5312/D5312M (2012; R 2013) Evaluation of Durability of Rock for Erosion Control Under Freezing and Thawing Conditions

ASTM D5313/D5313M (2012; R 2013) Evaluation of Durability of Rock for Erosion Control Under Wetting and Drying Conditions

U.S. ARMY CORPS OF ENGINEERS (USACE)

COE CRD-C 144 (1992) Standard Test Method for Resistance of Rock to Freezing and Thawing

COE CRD-C 148 (1969) Method of Testing Stone for Expansive Breakdown on Soaking in Ethylene Glycol

COE CRD-C 169 (1997) Standard Test Method for Resistance of Rock to Wetting and Drying

1.2 SCOPE OF WORK

The work provided for herein consists of furnishing all plant, labor, equipment, and materials and performing all work in strict accordance with the specifications, drawings and schedules for construction of the stone revetment.

SECTION 35 21 20.00 09 Page 2

1.3 GOVERNMENT TESTING AND STUDIES

1.3.1 Stone

1.3.1.1 General

All stone shall be durable material as approved by the Contracting Officer.

Stone shall be of a suitable quality to ensure permanence in the structure and in the climate in which it is to be used. It shall be free from cracks, blast fractures, bedding, seams and other defects that would tend to increase its deterioration from natural causes. The stone shall be clean and reasonably free from soil, quarry fines, and shall contain no refuse.

1.3.1.2 Sources

Stone shall be furnished from any of the sources listed at the end of this section, or at the option of the Contractor may be furnished from any other source designated by the Contractor and accepted by the Contracting Officer, subject to the conditions herein stated. If the Contractor proposes to furnish stone from a source not currently listed at the end of this section, the Government will evaluate the quality test data provided by the contractor to determine whether acceptable stone can be produced from the proposed source. Satisfactory service records on other work may be acceptable. In order for stone to be acceptable on the basis of service records, stone of a similar size must have been placed in a similar thickness and exposed to weathering under similar conditions as are anticipated for this contract, and must have satisfactorily withstood such weathering for a minimum of 5 years.

a. List of Sources. On the basis of information and data available to the Contracting Officer, stone meeting the quality requirements of these specifications has been produced from the sources listed at the end of this section.

Selection of Source. The Contractor shall designate in writing only one source or one combination of sources from which he proposes to furnish stone. If the Contractor proposes to furnish stone from a source not listed at the end of this section, he may designate only a single unlisted source for stone and he shall notify the Contracting Officer at least 60 workdays before the stone leaves the quarry. It is the Contractor's responsibility to determine that the stone source or combination of sources selected is capable of providing the quality, quantities and gradation needed and at the rate needed to maintain the scheduled progress of the work.

c. Acceptance of Materials. Acceptance of a source of stone is not to be construed as acceptance of all material from that source. The right is reserved to reject materials from certain localized areas, zones, strata, or channels, when such materials are unsuitable for stone as determined by the Contracting Officer. The Contracting Officer also reserves the right to reject individual units of produced specified materials in stockpiles at the quarry, all transfer points, and at the project construction site when such materials are determined to be unsuitable. During the course of the work, the stone may be tested by the Government, if the Contracting Officer determines that testing is necessary. If such tests are determined necessary, the testing will be done in the Government's testing laboratory.

Materials produced from a listed or unlisted source shall meet all the

SECTION 35 21 20.00 09 Page 3 requirements herein. The cost of testing will be at the Government's expense. During the contract period, both prior to and after materials are delivered to the job site, visual inspections and measurements of the stone materials may be performed by the Contracting Officer. If the Contracting Officer, during the inspections, finds that the stone quality, gradation or weights of stone being furnished are not as specified or are questionable, re-sampling and re-testing by the Contractor shall be required.

Sampling of the delivered stone for testing and the manner in which the testing is to be performed shall be as directed by the Contracting Officer. This additional sampling and testing shall be performed at the Contractor's expense when test results indicate that the materials do not meet specified requirements. When test results indicate that materials meet specified requirements, an equitable adjustment in the contract price will be made for the sampling and testing. Any material rejected shall be removed or disposed of as specified and at the Contractor's expense.

1.4 SUBMITTALS

Government approval is required for all submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-06 Test Reports

Gradation Test

The gradation tests shall be submitted using the GRADATION TEST DATA SHEET enclosed at end of this section.

Evaluation Tests

Quality tests on the stone in accordance with paragraph EVALUATION TESTING shall be the responsibility of the Contractor and submitted for approval prior to delivery of such material to the worksite.

SD-07 Certificates

Certification

Certificates of compliance attesting that the materials meet specification requirements shall be submitted to the Contracting Officer.

Laboratory

A copy of the testing laboratory's certification and inspection report shall be submitted along with actions taken to correct deficiencies.

SECTION 35 21 20.00 09 Page 4

PART 2 PRODUCTS

2.1 STONE

2.1.1 General

Only quarried stone shall be used. Gradation shall conform to the tables below and to the plates attached at the end of this section. A maximum of 10 percent flat and elongated pieces will be acceptable. A flat and elongated piece of stone is defined as a stone with either the width or thickness of the piece being less than one third of the length.

TABLE I: RIPRAP "R200"

Stone Weight in Pounds Cumulative Percent Finer by Weight

200 - 80 100 80 - 40 50 40 - 10 15

A plot of the gradation curve is attached at the end of this section.

2.1.2 Evaluation Testing

If the Contractor proposes to furnish stone from an unlisted source, the Contractor shall have evaluation tests performed on stone samples collected from the proposed source. The quarry investigation shall be performed by a registered geologist or registered engineer. The tests to which the stone shall be subjected include petrographic examination ( ASTM C295/C295M), bulk specific gravity (SSD), absorption ( ASTM C127), resistance of stone to freezing and thawing ( COE CRD-C 144 or ASTM D5312/D5312M ), and if argillaceous limestone and sandstone are used, resistance to wetting and drying ( COE CRD-C 169 ).

The laboratory to perform the required testing shall be validated based on compliance with relevant paragraphs of ASTM D3740, and no work requiring testing shall be permitted until the laboratory has been inspected and validated. The first inspection of the facilities shall be at the expense of the Government and any subsequent inspections required because of failure of the first inspection shall be at the expense of the Contractor.

Unit Weight and Absorption. Stone shall weigh more 155 pounds per cubic foot. The stone shall have an absorption less than 2 percent unless other tests and service records show that the stone is satisfactory. The method of test for unit weight and absorption shall be ASTM C127, except the unit weight shall be calculated in accordance with Note No. 5 using bulk specific gravity, saturated surface dry.

b. Petrographic Examination. Stone shall be evaluated in accordance with ASTM C295/C295M which shall include information required by ASTM D4992, paragraph 4, 5, 7 & 10. COE CRD-C 148 shall be used to perform Ethylene glycol tests required on rocks containing smectite as specified in ASTM D4992 and on samples identified to contain swelling clays.

c. Resistance to Freezing and Thawing. Stone shall have a maximum loss of 5 percent after the number of cycles specified in ASTM D5312/D5312M , Figure 1, when determining the durability of stone when subjected to freezing and thawing in accordance with COE CRD-C 144

SECTION 35 21 20.00 09 Page 5 or ASTM D5312/D5312M except the sample thickness shall be 2 inches plus or minus 1/4 inch, the alcohol/water solution shall cover the specimen by 3/4 inches plus or minus 1/4 inch during the freezing and thawing cycles, and the surface area of one side of the sample shall be between 144 square inches and 2,304 square inches.

d. Resistance of Rock to Wetting and Drying. Stone shall have a maximum loss of one percent when determining the durability of stone when subject to wetting and drying in accordance with COE CRD-C 169 or ASTM D5313/D5313M , except the surface area of one side of the sample shall be between 144 square inches and 2,304 square inches.

f. Samples. Samples of stone from a source not listed at the end of this section shall be taken by a representative of the quarry under the supervision of the Contracting Officer for testing and acceptance prior to delivery of any stone from this source to the site of the work. Information provided with the samples shall include the location within the quarry from which the sample was taken along with a field examination of the quarry. The field examination shall include the information outline in ASTM D4992, paragraph 7. Samples shall consist of at least three pieces of stone, roughly cubical in shape and weighing not less than 150 pounds each from each unit that shall be used in the production of the required stone. If the source is an undeveloped quarry, or if the operation has been dormant for more than one year such that fresh samples are not available, the Contractor shall expose fresh rock for 20 feet horizontally and for the full height of the face proposed for production, prior to the field evaluation. The Contracting Officer may also require documentation of subsurface exploration of an undeveloped quarry in order to determine whether or not sufficient reserves are available.

The samples shall be shipped at the Contractor's expense to a laboratory validated by the government to perform the required tests.

g. Tests. The tests shall be conducted by the Contractor in accordance with applicable ASTM and Corps of Engineers methods of tests given in the Handbook for Concrete and Cement, and shall be performed at a laboratory validated by the government. The cost of testing shall be borne by the Contractor.

2.1.3 Gradation Test

The Contractor shall perform a gradation test or tests on the graded stone at the quarry in accordance with paragraph STANDARD TEST METHOD FOR GRADATION OF RIPRAP AND GRADED STONE. The sample shall be taken by the Contractor in the presence of the Contracting Officer. The Contractor shall notify the Contracting Officer not less than 3 days in advance of each test. In the event of unavailability of a Government representative;

the Contractor shall perform the tests and certify to the Contracting Officer that the stone shipped complies with the specifications. At least one gradation test shall be performed per 50,000 tons of each size of stone placed, but not less than one test shall be performed. The gradation tests shall be reported using the forms, GRADATION TEST DATA SHEET and ENG FORM 4794 R, attached at end of this section. The Contractor shall designate on the test form that portion in tons of the lot tested which is applicable to this contract. Any deviation from the reported tonnage shall be corrected and recorded on a revised GRADATION TEST DATA SHEET. The sample shall consist of not less than 50 tons for Graded Stone "A", and shall be collected in a random manner which will provide a sample which accurately reflects the actual gradation arriving

SECTION 35 21 20.00 09 Page 6 at the jobsite. Failure of the test on the initial sample and on an additional sample will be considered cause for rejection of the quarry and/or quarry process, and all stone represented by the failed tests shall be set aside and not incorporated into the work. Any additional tests required because of the failure of an initial test sample will not be considered as one of the other required tests. If collected by the truckload, each truckload shall be representative of the gradation requirements. The Contracting Officer may direct additional testing of the stone at the project site if the stone appears by visual inspection, to be out of gradation. The Contracting Officer may direct this testing under the Contract Clause INSPECTION OF CONSTRUCTION. The Contractor shall provide all necessary screens, scales and other equipment, the operating personnel, and shall grade the sample. Certification and test results shall represent stone shipped from the quarry. Certification and tests results must be received by the Contracting Officer at the jobsite before the stone is used in the work.

PART 3 EXECUTION

3.1 STONE PLACEMENT

The stone revetment shall be constructed to the elevations, cross sections, and minimum thicknesses and within the limits shown on the contract drawings. Side slopes shall be determined by the angle of repose of the stone, approximately 1V on 1.5H. The stone revetment shall be constructed of RIPRAP "R200" as specified in paragraph STONE. Stone shall be placed in the stone revetment in such a manner as to produce a reasonably well-graded mass of stone with the minimum practicable percentage of voids. A tolerance of 1 foot will be allowed above the specified elevation and no tolerance below the specified elevation, and 0 foot under and 1 feet over the specified crown width, provided these variations are gradual over a minimum distance of 100 feet measured along the centerline. The stone may be placed by either backhoe or dragline equipped with rock bucket; by either front-end loader or bulldozer, except when placing the base blanket subaqueously; and by trucks and other methods, if approved by the Contracting Officer in writing. Additional stone shall be added if either soundings or sections indicate such to be necessary. The large stones shall be well distributed throughout the mass and the finished stone revetment shall be free from pockets of small stones and clusters of large stones. Bulldozing stone into excavated trenches will not be permitted. Subaqueous placement of stone will not be permitted at river stage limitations as specified in Section 01 00 00.00 09 GENERAL REQUIREMENTS, paragraph RIVER STAGE LIMITATION, without prior approval by the Contracting Officer in writing, or at any river stage when site and current conditions prevail which, in the opinion of the Contracting Officer, make construction operations either impractical or uneconomical.

3.2 PLACEMENT CONTROL

The Contractor shall be responsible for control of the placement of stone and shall furnish, operate, and maintain necessary equipment and furnish all necessary material and supplies. At all times when stone placement from floating plant is underway, the means by which the Contractor positions his plant, equipment, and stone supply barges must function accurately and consistently. The Contractor's plant and equipment shall have a dragline or backhoe capable of being mobile on the spud barge and the flexibility to perform stone placement by the drag-off method. The kick-off method for stone placement shall not be used unless approved by

SECTION 35 21 20.00 09 Page 7 the Contracting Officer. Whatever the method employed, it must permit the Contractor and the Government inspector readily to determine the exact position of the stone-placing operation. The Contractor shall not place anchors for the purpose of holding floating plant in place over existing or partially completed stone revetment.

3.2.1 Alignment Control

The method of alignment control shall be either a manned transit or laser or either colored or polarized light beams, or any other method demonstrable to be practicable and sufficiently precise and reliable as approved by the Contracting Officer's Representative.

3.2.2 Distance Control

The method of distance control for floating plant engaged in the subaqueous placement of stone shall be either wire distance wheel or another equally accurate measuring device as approved by Contracting Officer.

3.2.3 Depth Finder

An electronic recording depth finder, approved by the Contracting Officer in writing, shall be provided during the construction of the stone revetment. The depth finder shall have a recording scroll not less than 6 inches wide with a scale of not more than 10 feet of depth to the inch.

The depth finder shall be capable of obtaining accurate profiles and cross-sections during construction of the stone revetment and shall be used to monitor anticipated and actual scour and as an aid in the control of stone placement. The Contractor shall furnish and maintain an adequate stock of recording paper for the depth finder.

3.2.4 Nonpermitted Devices

The use of buoys and piles of stone placed above the water surface as placement control devices will not be permitted. The use of bank targets for alignment control will not be permitted for work distances of more than 400 feet without prior approval by the Contracting Officer in writing.

3.3 TESTS

3.3.1 General

The Contractor shall perform gradation tests to assure compliance with contract requirements and shall maintain detailed records.

3.3.2 Reporting

Reporting shall be in accordance with paragraph GRADATION TEST.

3.3.3 Standard Test Method for Gradation of Riprap and Graded Stone

a. Select a representative sample (Note No. 1), weigh and dump on hard stand.

b. Select specific sizes (see example) on which to run "individual weight larger than" test. (See Note No. 2). Procedure is similar to the standard aggregate gradation test for "individual weight retained".

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c. Determine the largest size stone in the sample. (100 percent size)

d. Separate by "size larger than" the selected weights, starting with the larger sizes. Use reference stones, with identified weights, for visual comparison in separating the obviously "larger than" stones.

Stones that appear close to the specific weight must be individually weighed to determine size grouping. Weight each size group, either individually or cumulatively.

e. Paragraph d above will result in "individual weight retained" figures. Calculate individual percent retained (heavier than) cumulative percent retained and cumulative percent passing (lighter than). Plot percent passing, along with the specification curve on ENG Form 4794 R.

NOTE NO. 1: Sample Selection: The most important part of the test and the least precise is the selection of a representative sample. No "standard" can be devised; larger quarry run stone is best sampled at the shot or stockpile by given direction to the loader; small graded stone is best sampled by random selection from the transporting vehicles. If possible, all parties should take part in the sample selection, and agree before the sample is run, that the sample is representative.

NOTE NO. 2: Selection of Size for Separation: It is quite possible and accurate to run a gradation using any convenient sizes for the separation, without reference to the specifications.

After the test is plotted on a curve, then the gradation limits may be plotted. Overlapping gradations with this method are no problem. It is usually more convenient, however, to select points from the gradation limits, such as the minimum 50 percent size, the minimum 15 percent size, and one or two others, as separation points.

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F O R

E X A M P L E

O N L Y

EXAMPLE GRADATION

SPECIFICATIONS

STONE WEIGHT IN LBS. PERCENT LIGHTER BY WEIGHT

400-160 100 160-80 50 80-30 15

EXAMPLE WORKSHEET

STONE SIZE INDIVIDUAL INDIVIDUAL CUMULATIVE PERCENT

LBS. WT. RETAINED PERCENT RETAINED RETAINED PASSING

400 0 0 0 100 160 9,600 30 30 70 80 11,200 35 65 35 30 8,000 25 90 10 -30 3,200 10 100 - TOTAL 32,000 lbs.

NOTE: Largest stone 251 lbs.

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