A22_Amendment_0002_W912P819B0019.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

Reference Solicitation No. W912P819B0019, for West Bank Mississippi River Levee, New Orleans To Venice, NOV-10, Happy Jack To Nairn, Plaquemines Parish, Louisiana, is amended as follow s:

Please see continuation pages for changes.

1. CONTRACT ID CODE PAGE OF PAGES

1 3

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

16C. DATE SIGNED

BY 16-Jan-2019

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 W912P819B0019

X 9B. DATED (SEE ITEM 11)

20-Dec-2018

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

16-Jan-2019

CODE

VICKSBURG DISTRICT 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:

W912P819B0019

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

Description:

Submittal Register – Description of change is the last page of the submittal register has been updated to include “SD-01 Preconstruction Submittals, Pre-Construction Surveys”.

Specification 35 31 19.04 12 STONE AND BEDDING CONSTRUCTION replaced in full – Description of change is paragraph 1.5 was updated and now states “Government approval is required for 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. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Pre-Construction Surveys; G

SD-05 Design Data

Compliance Surveys

SD-06 Test Reports

Gradation Tests

Specification 35 31 19.04 12 STONE AND BEDDING CONSTRUCTION replaced in full – Description of change is paragraph 1.6.1 (6) was updated and now states “(6) Compliance Surveys. The Contractor shall perform pre-construction and post-construction multibeam surveys for each subaqueous stone site. The Contractor shall perform the surveys at least two (2) days prior to starting work and at least two (2) days after completing the work. All the raw multibeam survey data shall be edited by the Contractor within five (5) days of completing the multibeam survey for each subaqueous stone site. The final edited multibeam data set shall be delivered in two (2) files for each subaqueous stone site. The first file shall contain all the edited points reported in ASCII XYZ format. This file shall be “thinned” using the shot depth or elevation point closest to the ASCII XYZ 2x2 grid format. The second file shall follow the same format, but shall contain the data for the post-construction survey. The Contractor shall deliver the two

(2) edited ASCII XYZ files on DVD. All the survey data shall be converted and/or reduced to the North American Vertical Datum of 1988 (NAVD88 2004.65). The multibeam system used to conduct these surveys shall use the navigational beacon broadcast signal to position the survey vessel. The Contractor shall perform one hundred percent (100%) full bottom coverage surveys of each subaqueous stone site, including five hundred (500) feet on all four (4) sides. The multibeam system alignment checks and the patch test shall be performed as indicated within the Engineering Manual, EM-1110-2-1003, Hydrographic Surveying. The performance tests conducted on the multibeam system are required. The allowable standard deviation is a function of the project depth, as indicated in Table 3-1 of EM 1110-2- 1003. All multibeam surveys shall be performed by qualified survey personnel in the presence of the Contracting Officer’s Representative. No additional payment will be made for multibeam surveys and shall be considered incidental to "River Channel Buttress Riprap".”

Specification 35 31 19.04 12 STONE AND BEDDING CONSTRUCTION replaced in full – Description of change is paragraph 3.2 was updated and now states “All river channel buttress riprap shall be

W912P819B0019 constructed to the design grades and sections shown on the drawings. For graded stone, at all points, a tolerance of plus twelve inches will be allowed in the design grades and sections. Material that is placed outside the allowable tolerance will not be paid for. Following placement of the stone, a survey will be conducted within at least two (2) days after completing the work to determine whether final grade tolerance is met. If grade is not met, additional stone will be placed to bring within the specified tolerance. The Contractor shall submit compliance surveys in accordance with 1.6.1 (6).”

SUBMITTAL FORM,Jan 96 PREVIOUS EDITION IS OBSOLETE PAGE 4 OF 4 PAGES

Happy Jack to Nairn

32 92 19.04 12 GHerbicide Application Plan SD-07 Certificates

2.1.3Seed 35 31 19.04 12 SD-01 Preconstruction Submittals

GPre-Construction Surveys SD-05 Design Data Compliance Surveys

SD-06 Test Reports Gradation Tests

SUBMITTAL REGISTER

CONTRACT NO.

TITLE AND LOCATION CONTRACTOR

CONTRACTOR:

SCHEDULE DATES

CONTRACTOR

ACTION

APPROVING AUTHORITY

A C T I V I T Y

N O

T R A N S M I T T A L

N O

S P E C

S E C T

DESCRIPTION

ITEM SUBMITTED

P A R A G R A P H

C L A S S I F I C A T I O N

G O V T

O R

A E

R E V W

R SUBMIT

APPROVAL

NEEDED

BY

MATERIAL

NEEDED

BY

A C T I O N

C O D E

DATE

OF

ACTION

DATE FWD

TO APPR

AUTH/

DATE RCD

FROM

CONTR

DATE FWD

TO OTHER

REVIEWER

DATE RCD

FROM OTH

REVIEWER

A C T I O N

C O D E

DATE

OF

ACTION

MAILED

TO

CONTR/

DATE RCD

FRM APPR

AUTH REMARKS

(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (l) (m) (n) (o) (p) (q) (r)

NOV-10 SPECIFICATIONS

SECTION TABLE OF CONTENTS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

SECTION 35 31 19.04 12

STONE AND BEDDING CONSTRUCTION

09/07

PART 1 GENERAL

1.1 SCOPE

1.2 MEASUREMENT

1.2.1 Graded Stone

1.3 PAYMENT

1.3.1 Graded Stone

1.4 REFERENCES

1.5 SUBMITTALS

1.6 QUALITY CONTROL

1.6.1 General

1.6.2 Reporting

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Graded Stone

2.1.1.1 General

2.1.1.2 Sources and Evaluation Testing

2.1.1.3 Size: River Channel Buttress Riprap

2.2 MVN STANDARD TEST METHOD FOR GRADATION OF STONE

2.2.1 General

2.2.1.1 Sample Selection

2.2.1.2 Selection of Size for Separation

2.2.2 Procedure

PART 3 EXECUTION

3.1 CONSTRUCTION

3.1.1 General

3.1.2 Placement

3.2 GRADE TOLERANCES

-- End of Section Table of Contents --

SECTION 35 31 19.04 12 Page 1

SECTION 35 31 19.04 12

STONE AND BEDDING CONSTRUCTION

09/07

PART 1 GENERAL

1.1 SCOPE

The work covered by this section consists of furnishing all plant, labor, equipment and materials, and performing all operations in connection with furnishing and placing River Channel Buttress Riprap and other incidental work as may be necessary to complete the river channel buttress riprap placement as shown on the drawings, and as herein after specified.

1.2 MEASUREMENT

1.2.1 Graded Stone

The unit of measurement for "River Channel Buttress Riprap" satisfactorily placed in the work will be the ton (2,000 pounds). Quantities will be computed to the nearest whole ton. If delivered by barge, the Contractor shall furnish the Contracting Officer a barge displacement table, not less than 10 days prior to unloading stone from any barge for which a displacement table has not been furnished and approved. The Contractor shall furnish with the barge displacement table a drawing or sketch of each barge, dimensioned in sufficient detail to permit checking of the tables.

The drawing shall show, as a minimum, the length, width, and depth of the barge, and dimensions of rake or rakes. Each such table shall have its accuracy certified by a person or firm, other than the Contractor, customarily performing this service and who has been approved by the Contracting Officer. Each table submitted shall show the name and\or number of the barge, the barge dimensions, the barge owner, the name of the fabricator, certification, and date of certification of the person or firm preparing the table. All new or modified barges shall be field checked for current dimensions by the Contractor, in the presence of the Contracting Officer's representative. Each table submitted shall contain in parallel columns, the freeboard of the barge in feet and tenths from zero to the full depth of the barge, and the corresponding gross displacement to the nearest ton. Each barge shall be suitably marked with two displacement gaging lines along each side of the barge. Each gaging line shall be painted perpendicular to the edge of the barge and be no less than 4 inches wide and 1 foot long, on both the deck and side of the barge. Barges with rakes shall have the displacement gaging lines placed at each corner of the box section between the rakes. If a barge has a box end or ends, the gaging lines shall be placed approximately 4 feet from the box end. The freeboard will be measured at the four gaging locations and displacement shall be determined by the use of the "CELMV Standard Barge Tables" from the average of these measurements. The displacement shall be determined before and after the barge is unloaded and the difference between these values shall be the quantity delivered. If barge tables are furnished for fresh water and if the Contractor believes that barge displacement measurements made within the contract limits of work are being taken in water that has salinity, he will have the option of obtaining water samples and determining densities or unit weights of these samples. These water samples shall be taken in accordance with ASTM D3370 (practice A-Grade Sample) at depths of 4 and 8 feet in the area where measurements are made.

SECTION 35 31 19.04 12 Page 2

Water sampling shall be performed when the barges are measured for quantities, both when fully loaded and when empty. Water samples shall be taken by the Contractor and witnessed by a Contracting Officer's representative with the use of "Polypro" 2,000 milliliter water sampler, or equal. Densities shall be determined as specified in ASTM D1429 (Method D

- Hydrometer Method). Testing shall be performed by a certified and approved testing laboratory, and test results certified by this laboratory. After review and approval of the test results by the Government, the average of the densities obtained at 4 feet and 8 feet will be used as the suitable salt water conversion factor. In all calculations, the unit weight of 62.45 pounds/cubic foot will be used for fresh water.

If the Contractor does not obtain water samples and densities, then no adjustment or conversion factor will be applied to stone or riprap quantities determined by displacement tables. When stone, not handled by barge, is delivered by truck from a quarry or railroad siding, it shall be weighed on approved scales before being placed in the work. The scales shall be located as near the site of the work as is practicable and shall be tested as often as necessary to ensure accurate weights, as determined by the Contracting Officer. The Contractor shall furnish the scales and shall weigh the stone in the presence of a Contracting Officer's representative, who will certify to the correctness thereof. Weight certificates furnished by a public weighmaster will be acceptable in lieu of such procedures when authorized by the Contracting Officer.

1.3 PAYMENT

1.3.1 Graded Stone

Payment for graded stone satisfactorily placed will be made at the contract unit price per ton for "River Channel Buttress Riprap". Price and payment shall constitute full compensation for furnishing all plant, labor, materials, and equipment required for testing, hauling, handling, placing and maintaining the graded stone.

1.4 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

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

ASTM D1429 (2013) Specific Gravity of Water and Brine

ASTM D3370 (2010) Sampling Water from Closed Conduits

1.5 SUBMITTALS

Government approval is required for 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. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

SECTION 35 31 19.04 12 Page 3

Pre-Construction Surveys; G

SD-05 Design Data

Compliance Surveys

SD-06 Test Reports

Gradation Tests

1.6 QUALITY CONTROL

1.6.1 General

The Contractor shall inspect all materials before they are incorporated into the work for compliance with contract requirements and any material found to be defective will be rejected. All information pertaining to the inspection shall be recorded and included in quality control reports furnished the Contracting Officer. The Contractor shall establish and maintain quality control for construction operations to assure compliance with contact requirements, and maintain records of his quality control for all construction operations. The quality control reports shall include, but not be limited to, the following:

(1) Equipment. Type, size, and suitability for construction of the prescribed work.

(2) Submission of stone samples for quality testing, if from other than approved sources, as specified in paragraph Sources and Evaluation Testing.

(3) Quality of stone, and bedding meets the requirements specified.

(4) Quantity of stone, and bedding delivered and placed each day.

(5) Gradation of Stone. Gradation tests of stone shall be accomplished at the quarry. Tests by weight shall be made by the Contractor in the presence of the Contracting Officer's Representative. The Contractor shall notify the Contracting Officer not less than 3 working days in advance of each test. In the event of nonavailability of the Government representative, the Contractor shall perform the tests and certify to the Contracting Officer that the stone shipped complies with the specifications. A minimum of one test shall be performed for each 25,000 tons, or fraction thereof, of stone supplied to the Government from each source. Each test sample shall be representative of the stone being shipped and shall consist of not less than 15 tons. Percentage determinations shall be made for each stone weight specified. Gradation test data shall be recorded on MVN form 602-R "Gradation Test Data Sheet", a copy of which is shown at the end of this section. 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.

Certification and test results shall represent stone shipped from the quarry and must be received by the Government representative before the stone is used in the work. The Contractor shall designate on the test

SECTION 35 31 19.04 12 Page 4 form that portion (in tons) of the lot tested which is applicable to this contract. Any deviation from the reported tonnage shall be corrected on a revised gradation test form. The Contracting Officer may direct, under the Contract Clause "INSPECTION OF CONSTRUCTION" (FAR 52.246-12), additional testing of stone furnished to the worksite if the stone appears, by visual inspection, to be of questionable gradation or quality. Refer to paragraph MVN STANDARD TEST METHOD FOR GRADATION OF STONE for the gradation test method.

(6) Compliance Surveys. The Contractor shall perform pre-construction and post-construction multibeam surveys for each subaqueous stone site.

The Contractor shall perform the surveys at least two (2) days prior to starting work and at least two (2) days after completing the work. All the raw multibeam survey data shall be edited by the Contractor within five (5) days of completing the multibeam survey for each subaqueous stone site. The final edited multibeam data set shall be delivered in two (2) files for each subaqueous stone site. The first file shall contain all the edited points reported in ASCII XYZ format. This file shall be “thinned” using the shot depth or elevation point closest to the ASCII XYZ 2x2 grid format. The second file shall follow the same format, but shall contain the data for the post-construction survey.

The Contractor shall deliver the two (2) edited ASCII XYZ files on DVD.

All the survey data shall be converted and/or reduced to the North American Vertical Datum of 1988 (NAVD88 2004.65). The multibeam system used to conduct these surveys shall use the navigational beacon broadcast signal to position the survey vessel. The Contractor shall perform one hundred percent (100%) full bottom coverage surveys of each subaqueous stone site, including five hundred (500) feet on all four

(4) sides. The multibeam system alignment checks and the patch test shall be performed as indicated within the Engineering Manual, EM-1110-2-1003, Hydrographic Surveying. The performance tests conducted on the multibeam system are required. The allowable standard deviation is a function of the project depth, as indicated in Table 3-1 of EM 1110-2-1003. All multibeam surveys shall be performed by qualified survey personnel in the presence of the Contracting Officer’s Representative. No additional payment will be made for multibeam surveys and shall be considered incidental to "River Channel Buttress Riprap".

1.6.2 Reporting

The original and two copies of these records, as well as the records of corrective action taken, shall be furnished the Government daily. Format of report shall be as prescribed in Section 01 45 04.00 10 CONTRACTOR

QUALITY CONTROL.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Graded Stone

2.1.1.1 General

All stone shall be of a hard, durable quality such as will not disintegrate under the elements or be easily broken in handling. It shall be clean and free from earth, dust, or other refuse. The faces of individual pieces of stone shall be roughly angular, not rounded, in shape. Field stone will not be accepted.

SECTION 35 31 19.04 12 Page 5

2.1.1.2 Sources and Evaluation Testing

Stone shall be obtained in accordance with the General Provision entitled "STONE SOURCES" (see Section 01100 GENERAL PROVISIONS). If the Contractor proposes to furnish stone from a source not listed in "STONE SOURCES", the Government will make such investigations as necessary to determine whether acceptable stone can be produced from the proposed source. Satisfactory service records on work outside the Corps of Engineers will be acceptable.

If no such records are available, the Government will make tests to assure the acceptability of the stone. The tests to which the stone may be subjected will include petrographic analysis, specific gravity, abrasion, unit weight, absorption, wetting and drying, freezing and thawing and such other tests as may be considered necessary by the Contracting Officer. The following guidance is provided for use by the Contractor in analyzing a source of stone not listed in "STONE SOURCES". Stone that weighs less than 155 pounds per cubic foot or has more than 2 percent absorption will not be accepted unless other tests and service records show that the stone is satisfactory. The method of test for unit weight and absorption will be ASTM C127 except that unit weight will be calculated in accordance with note 5 using bulk specific gravity, S.S.D. Samples of stone from a source not listed in "STONE SOURCES" shall be submitted to the Contracting Officer for testing and acceptance prior to delivery of any stone to the site of the work. Samples shall consist of at least seven pieces of stone, roughly cubical in shape and weighing not less than 100 pounds each. All such samples shall be taken by the Contractor under the supervision of the Contracting Officer. The samples shall be shipped at the Contractor's expense to the U.S. Army Engineer Research and Development Center (ERDC), 3909 Halls Ferry Road, Vicksburg, Mississippi, at least 90 days in advance of the time of the placing of the stone is expected to begin. The tests will be conducted in accordance with applicable Corps of Engineers methods of tests and will be performed at the U.S. Army Engineer Research and Development Center (ERDC), Vicksburg, Mississippi. The cost of testing will be borne by the Government.

2.1.1.3 Size: River Channel Buttress Riprap

Grade B Stone shall be in pieces graded approximately as follows:

Stone Weight (lbs.) Cumulative Percent Finer By Weight

1200 Pounds 100 750 Pounds 72-100 200 Pounds 40-65 50 Pounds 20-38 10 Pounds 5-22 5 Pounds 0-15

1 Pound 0-5

2.2 MVN STANDARD TEST METHOD FOR GRADATION OF STONE

2.2.1 General

2.2.1.1 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 muck pile by given direction to

SECTION 35 31 19.04 12 Page 6 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.

2.2.1.2 Selection of Size for Separation

It is quite possible and accurate to run a gradation using any convenient sizes for separation, without reference to specifications. After the test is plotted on a curve, then the gradation limits may be plotted.

Overlapping gradations with this method are acceptable. It is usually more convenient, however, to select points from the gradation limit, such as the minimum 50 percent size, the minimum 15 percent size, and one or two others, as separate points.

2.2.2 Procedure

(1) Select a representative sample (See paragraph Sample Selection), weigh and dump on hard stand.

(2) Select specific sizes (see example) on which to run "individual weight larger than" test. Procedure is similar to the standard aggregate gradation test for "individual weight retained".

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

(4) 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. Weigh each size group, either individually or cumulatively.

(5) Subparagraph (4) will result in "individual weight retained" figures. Calculate individual percent retained (heavier than) and cumulative percent retained and cumulative percent passing (lighter than). Plot percent passing, along with the specification limits on ENG Form 4055 and fill-in and document test on MVN Form 602-R.

EXAMPLE GRADATION

SPECIFICATIONS

STONE WEIGHT IN LBS. INDIVIDUAL PERCENT RETAINED

75 - 125 10 max.

25 - 74 40 - 60 6 - 24 20 - 40 <6 15 max.

EXAMPLE WORKSHEET

STONE WEIGHT INDIVIDUAL WEIGHT INDIVIDUAL %

IN LBS. IN POUNDS RETAINED SPECIFICATIONS

+125 0 0 0 0 75 - 125 2,600 30 30 0

SECTION 35 31 19.04 12 Page 7

25 - 74 16,200 35 65 5 6 - 24 10,000 25 90 0 < 6 3,200 10 100 0 TOTAL 32,000 lbs.

NOTE: Largest stone 125 lbs.

PART 3 EXECUTION

3.1 CONSTRUCTION

3.1.1 General

The River Channel Buttress Riprap shall be placed within the limits, lines, grades, and sections shown on the drawings.

3.1.2 Placement

The large stone shall be well distributed throughout the mass and the finished structure shall be free from pockets of small stone and clusters of larger stone. Excavation for floating plant on the protected or flood side of the levee will not be permitted.

3.2 GRADE TOLERANCES

All river channel buttress riprap shall be constructed to the design grades and sections shown on the drawings. For graded stone, at all points, a tolerance of plus twelve inches will be allowed in the design grades and sections. Material that is placed outside the allowable tolerance will not be paid for. Following placement of the stone, a survey will be conducted within at least two (2) days after completing the work to determine whether final grade tolerance is met. If grade is not met, additional stone will be placed to bring within the specified tolerance. The Contractor shall submit compliance surveys in accordance with 1.6.1 (6).

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SECTION 35 31 19.04 12 Page 8