IFB W912HN-10-B-0010 Amend 0005.pdf

WILMINGTON CONSTRUCTION BRANCH

ATTN: JIM MULLINS

69 DARLINGTON AVENUE

WILMINGTON NC 28403

W81LJ893519461

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Solicitation No. W912HN-10-B-0010, entitled Clearing and Spillw ay System Maintenance, Atlantic Intracoastal Waterw ay Northern Disposal Areas 16, 19, and 21, Hyde County and Pamlico County, NC. is amended as follow s:

A. See Summary of Changes.

B. The Time and Date for Bid Opening is 26 Mar 2010 02:00 PM and remains unchanged.

C. All other terms and conditions of the solicitiaton remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

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

16C. DATE SIGNED

BY 22-Mar-2010

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 W912HN-10-B-0010

X 9B. DATED (SEE ITEM 11)

19-Feb-2010

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

22-Mar-2010

CODE

USACE CONTRACTING, WILMINGTON DISTRICT

ATTN: BRUCE HELMS

69 DARLINGTON AVE

WILMINGTON NC 28403-1343

W912HN 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE W912HN

FACILITY CODECODE

EMAIL:TEL:

W912HN-10-B-0010

SECTION 01 10 00.10 38 – SUPPLEMENTARY SPECIAL CONTRACT REQUIREMENTS

Delete existing Page 10 through Page 15 in their entirety and replace with revised enclosed like-numbered Pages.

SECTION 31 01 00 – DIKE EMBANKMENT

Delete existing Page 1 through Page 8 in their entirety and replace with revised enclosed Page 1 through Page 7.

NOTE:

Text that is added or revised by this amendment is replaced in its entirety and underlined and/or printed in bold and/or stamped appropriately.

The text changes may have necessitated reformatting of subsequent text or pages. If this is the case, those pages have also been issued as amended pages but are not underlined or bold text.

DRAWINGS

Delete existing Plates P-4, P-6, P-18 and P-24 in their entirety and replace with revised Plates.

-- End of Summary of Changes--

Encls As stated

Disposal Areas 16, 19 and 21 Clearing & Maintenance W912HN-10-B-0010 Hyde County and Pamlico County, North Carolina

(2) Any shop drawings which constitute part of the design shall be included with the record drawings.

(3) The manufacturer and model number of all major items of equipment shall be shown on the record drawings.

(4) Upon completion of all construction, the Contractor will delete by notation all references to features not constructed.

(b) These annotated prints shall be certified as to their correctness by the signature of the Contractor and turned over to the Contracting Officer not later than ten (10) days after final acceptance of the work by the Government. Marked up prints shall be reviewed for approval by the Contracting Officer and returned for corrections as necessary.

(End of Clause)

1.17 SURVEY DATA

The Contractor shall maintain complete and accurate field notes, sketches, recordings and computations required in establishing the necessary horizontal and vertical control. All survey data shall be recorded in accordance with accepted standards and as approved by the Contracting Officer. All the above data shall be available at all times during the progress of the work for ready examination and use by the Contracting Officer. Upon request of the Contracting Officer, the Contractor shall furnish a copy of above survey data.

(End of Clause)

1.18 ADDITIONAL SURVEY AND SURVEY PERSONNEL REQUIREMENTS

(a) Survey personnel. All quantity surveys required by the Contractor, except those for any periods for which progress payments are requested, shall be made by personnel of a professional engineering and/or surveying firm experienced in the practice of such work including Global Positioning Systems (GPS) surveys. The survey personnel shall have the following minimum qualifications.

(1) Each party chief shall be a Professional Land Surveyor and shall be proficient in the operation of precise and semi-precise instruments. They shall be capable of running horizontal and vertical control of 2nd order accuracy. In the event it is considered advantageous to employ a party chief who is not a Professional Land Surveyor, detailed qualifications of the individual shall be submitted to the Contracting Officer for review and approval.

(2) Instrument men shall be proficient in the operation of precise and semi-precise instruments including transit, level, total station, GPS, and alidade, and shall prepare all survey notes in a firm and legible manner.

(3) Rodman and chainman. All rodmen and chainmen shall each have a minimum of six months prior experience.

(4) Surveying technicians shall be familiar with all phases of surveys and the North Carolina State plane coordinate system. Also they shall be well versed in the computation and adjustment of horizontal and

SECTION 01 10 00.10 38 Page 10 (Revised by Amendment No. 0005) vertical control of 2nd and 3rd order survey.

(b) Original and final as-built cross sections. Original ground surveys at each disposal area shall be taken prior to any earth moving operations. Final as-built cross sections shall be taken at each disposal area after grading has been accomplished to the lines and grades required by the plans and specifications. All original and final as-built cross sections made for payment purposes shall be taken on an interval not to exceed 100 feet. Cross sections shall be taken perpendicular to the centerline of the dike. Elevations across the dike shall be taken at least every 25 feet and at all breaks in grade including outside toe of dike, outside top of dike, inside top of dike, and inside toe of dike. All features shall be labeled in the notes or electronic data collector.

Original and final as-built cross sections shall extend from 25 feet beyond the outside toe of the existing dike, over the dike, and a minimum of 50 feet beyond the new dike embankment inside toe fill limits. Cross sections through the disposal area will be required only for final as-built cross sections. Cross sections through the disposal area shall be taken every 200 feet. For Cross sections through the disposal area, elevations shall be taken at least every 50 feet and at all breaks in grade. Final as-built cross sections shall include a section at each of the spillway locations.

The cross sections at the spillway locations shall provide ground elevations extending from the spillway riser along the alignment of the pipe to a point 10 feet beyond the discharge end of the pipe. The Contractor shall provide original cross sections to the Contracting Officer a minimum of 7 days prior to commencement of earth moving operations.

Final as-built cross sections shall be provided to the Contracting Officer upon completion of work.

(c) Deliverables. The Contractor shall provide CADD files, a Metadata Record, and a Written Survey Report for both the pre-construction survey and the post construction survey.

(1) CADD Files. All CADD deliverables shall conform to the CADD standards information provided at the following internet site:

https://cadbim.usace.army.mil/

Digital Terrain Modeling shall be submitted in a Bentley InRoads (.dtm) file, Version 8xM or later format. All graphics shall be supplied in a Bentley Microstation Version 8xM (.dgn) format. Contouring shall be generated from the surface model file with appropriate contour smoothing and shall be included in the Microstation graphics file. The graphics file shall be a three dimensional file with all topographic data and planimetric features.

Additional digital files to be submitted along with the .dgn and .dtm files include an all-inclusive ASCII point file with descriptions, an ASCII point file of .dtm data with descriptions, a Breakline file exported directly from Inroads or a Microstation graphics file of Breaklines, an Interior Boundary file exported directly from Inroads or a Microstation graphics file of Interior Boundaries (where applicable), and an Exterior Boundary file exported directly from Inroads or a Microstation graphics file of Exterior Boundaries (where applicable),

(2) Metadata Record. An FGDC compliant metadata record for both the pre-construction survey and the post construction survey shall be created using ESRI ArcView/ArcInfo ArcCatalog 9.x or higher. Appropriate

SECTION 01 10 00.10 38 Page 11 information shall be entered in all required fields. The metadata record shall be submitted on CD or DVD or via email with all other digital files.

(3) Final Written Survey Report. A separate written report for both the pre-construction survey and the post construction survey summarizing all data collection activities shall be submitted as a Portable Document File (PDF). The following items shall be included in the survey report: all Horizontal and Vertical Control used including monument name, establishing agency, date established, description, and published horizontal and vertical values; TBM descriptions with vertical values; copy of all field notes; complete and detailed list of all survey equipment used including copy of last factory calibration report; and Metdata Record as described above.

(d) Quality Control. All data and deliverables shall be reviewed for the following: required coverage of the survey limits, capture of all required features, required accuracies, required horizontal and vertical datum, no crossing contours, no conflicts between the additional digital files and DTM, and compliance with CADD Standards described in (c)(1) above.

(End of Clause)

1.19 PLANT LOCATION

The Contractor's plant shall be arranged and located in areas approved by the Contracting Officer. This requirement includes the construction plant;

offices; shop and storage buildings; housing facilities and all other equipment and materials needed to construct the project.

(End of Clause)

1.20 WORK IN QUARANTINED AREA

USACE and the U.S. Department of Agriculture (USDA) have a compliance agreement requiring measures to prevent the spread of certain plant pests that may be present in the soil (USACE ER 1110-1-5). Major portions of all southeastern states are in a quarantine area for such pests, including the imported fire ant. In addition, adjacent states to the north have introduced infestations resulting from movement of soil from infested southeastern states. The Contractor shall thoroughly clean all construction equipment and tools at the previous job site in a manner that ensures that these implements are free from residual soil, egg deposits from plant pests, noxious weeds, and plant seeds. Equipment shall be cleaned using water under pressure, and hand tools shall be thoroughly cleaned by brushing or other means to remove all soil. In addition, all construction equipment used for this USACE contract shall be thoroughly cleaned by the Contractor before it is removed from this job site. The Contractor shall consult with the USDA jurisdictional office for additional cleaning requirements that may be necessary.

(End of Clause)

1.21 FINAL AND CONDITIONAL ACCEPTANCE OF GRASSING

When, upon completion of the final construction inspection, the work is found to comply fully with contract plans, specifications, change orders, and modifications, the Contracting Officer will give final acceptance, provided a satisfactory stand of grass has been obtained. If, due to the

SECTION 01 10 00.10 38 Page 12 season, satisfactory life and growth of grass cannot be determined when all work is completed, the Contracting Officer shall give the Contractor written notice of conditional acceptance. This notice of conditional acceptance will relieve the Contractor of further construction or maintenance work except as noted until the next growing season, at which time he will be required to produce a living and satisfactory stand of grass and apply water and/or fertilizer as required by the Contracting Officer to produce a grass cover in full compliance with the intent of these specifications. The Contractor shall maintain adequate erosion control measures during periods of conditional acceptance of grassing.

(End of Clause)

1.22 IDENTIFICATION OF EMPLOYEES

The Contractor shall be responsible for furnishing to each employee and for requiring each employee engaged on the work to display such identification as may be approved and directed by the Contracting Officer. All prescribed identification shall immediately be delivered to the Contracting Officer for cancellation upon the release of any employee. When required by the Contracting Officer the Contractor shall obtain and submit fingerprints of all persons employed or to be employed on the project.

(End of Clause)

1.23 MAINTENANCE DURING CONSTRUCTION

From the first day any work is done, the Contractor shall maintain in an equally satisfactory condition all of the items of work covered by the contract until they are finished, placed in service unfinished, or until all of the work is finally accepted. This maintenance shall be continuous and effective work prosecuted day by day with adequate equipment to the end that roadway and structures are kept in satisfactory and acceptable condition. The Contractor shall be responsible for maintaining all barricades, danger, warning, and detour signs and lights as specified hereinafter. When no pay item for such maintenance is shown in the Bidding Schedule, the cost of maintenance shall be included in the price bid for other pay items, and no separate payment will be made.

(a) Maintenance when work is suspended. If construction is suspended for any reason, the Contractor shall place the work in such condition as the Contracting Officer directs, before suspension, and shall maintain it in a condition satisfactory to the Contracting Officer throughout the period of the suspension.

(b) Final mowing. When the work is otherwise completed, and before it is finally accepted, the Contractor shall give the seeded areas a final mowing, as directed by the Contracting Officer.

(c) Spilled materials. The Contractor shall not allow spilled materials to remain on the highways. Spillage sufficient to create a traffic hazard shall be removed immediately. Other light spillage shall be removed daily.

(End of Clause)

1.24 PARTNERING

In order to most effectively accomplish this contract, the Government

SECTION 01 10 00.10 38 Page 13 proposes to form a cohesive partnership with the Contractor and its subcontractors. This partnership would strive to draw on the strengths of each organization in an effort to achieve a quality project done right the first time, within budget and on schedule. Integral to the partnership would be a joint Contractor/Government effort to settle any disputes that may arise without costly and time consuming litigation. To that end, a non-binding procedure such as the Alternate Dispute Resolution process could be developed and agreed upon by both parties when it is determined to be necessary. This partnership would be bilateral in make-up and participation will be totally voluntary. Any cost associated with developing this partnership will be agreed to by both parties and will be shared equally with no change in contract price.

(End of Clause)

1.25 LOAD RESTRICTIONS

The Contractor shall comply with all legal load restrictions in the hauling of materials on public roads beyond the limits of the project. A special permit will not relieve the Contractor of liability for damage which may result from such hauling. The Contractor shall not operate equipment of such weight or so loaded as to cause damage to drainage structures or the roadway, or to any other type of improvement, either completed or under construction. Hauling of materials over the existing surface shall be limited as directed, and in no case shall legal load limits be exceeded unless permitted in writing. The Contractor shall repair, at his own expense, all damage to the work caused by his equipment.

(End of Clause)

1.26 PROTECTION OF EXISTING FACILITIES

The Contractor will not be responsible for any alterations to existing structures or utilities except those made by him for his convenience. The Contractor shall protect all existing structures, including bridges, roadway embankments, utilities and improvements from damage, and, in the event of damage as a result of his operations, the Contractor shall be responsible for their repair, restoration, or for all cost of damage resulting therefrom. In addition, the Contractor shall be responsible for any damage to bridge or culvert structures or railway embankments or track caused by the unauthorized excavation or excavation beyond the project dimensions shown on the plans. If the Contractor elects to have alterations made to any existing structure, utility or other improvements for his convenience, he shall make arrangements with the owner of the facility for such alterations and the agreement shall be approved by the Contracting Officer prior to their alteration.

(End of Clause)

1.27 CONTRACT AREA AND TRESPASSING

The Contractor shall not inflict damage upon land outside the contract area by unwarranted entry upon, passage through, or disposal of material on such land. The Contractor may make a separate agreement with any other party, regarding the use of, or right to, lands or facilities outside the contract area. If such an agreement is made, it shall be in writing and a copy shall be furnished the Contracting Officer. The Contractor shall hold and save the Government, its officers, and agents free from liability of any nature or kind arising from any trespassing or damage occasioned by his

SECTION 01 10 00.10 38 Page 14 operations.

(End of Clause)

1.28 CONTRACT DRAWINGS AND SPECIFICATIONS

(AUG 2000) DFARS 252.236-7001

(a) The Government will provide to the Contractor, without charge, five (5) sets of contract drawings and specifications, except publications incorporated into the technical provisions by reference, in electronic or paper media as chosen by the Contracting Officer.

(b) The Contractor shall—

(1) Check all drawings furnished immediately upon receipt;

(2) Compare all drawings and verify the figures before laying out the work;

(3) Promptly notify the Contracting Officer of any discrepancies;

(4) Be responsible for any errors that might have been avoided by complying with this paragraph (b); and

(5) Reproduce and print contract drawings and specifications as needed.

(c) In general--

(1) Large-scale drawings shall govern small-scale drawings;

and

(2) The Contractor shall follow figures marked on drawings in preference to scale measurements.

(d) Omissions from the drawings or specifications or the misdescription of details of work that are manifestly necessary to carry out the intent of the drawings and specifications, or that are customarily performed, shall not relieve the Contractor from performing such omitted or misdescribed details of the work. The Contractor shall perform such details as if fully and correctly set forth and described in the drawings and specifications.

(e) The work shall conform to the specifications and the contract drawings identified in Section 00 01 15 LIST OF DRAWINGS.

(End of clause)

SECTION 01 10 00.10 38 Page 15

SECTION TABLE OF CONTENTS

DIVISION 31 - EARTHWORK

SECTION 31 01 00

DIKE EMBANKMENT

PART 1 GENERAL

1.1 SCOPE

1.2 REFERENCES

1.3 SUBMITTALS

1.4 DEFINITIONS

1.4.1 Raised Embankment

1.4.2 Excavated Material

1.4.3 Satisfactory Material

1.4.4 Unsatisfactory Materials

1.4.5 Degree of Compaction

1.5 GENERAL PROVISIONS

1.5.1 Lines and Grades

1.5.2 Conduct of the Work

1.6 EQUIPMENT

1.7 MEASUREMENT AND PAYMENT

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Dike Embankment

2.1.2 Cohesionless and Cohesive Materials

2.1.3 Subsurface Data

PART 3 EXECUTION

3.1 BORROW AREA

3.2 FOUNDATION PREPARATION

3.3 PLACEMENT

3.3.1 Dike Embankment

3.4 COMPACTION

3.5 SLOPE FAILURES

3.6 TESTING

3.7 FILL AND BACKFILL MATERIAL GRADATION

3.8 IN-PLACE DENSITIES AND MOISTURE CONTENTS

3.9 MOISTURE CONTENTS

3.10 OPTIMUM MOISTURE AND LABORATORY MAXIMUM DENSITY

3.11 GRADING

-- End of Section Table of Contents --

SECTION 31 01 00 Page 1

SECTION 31 01 00

DIKE EMBANKMENT

PART 1 GENERAL

1.1 SCOPE

The work covered by this section of the specifications consists of furnishing all labor, equipment, supplies, materials, tools, and incidentals necessary to perform all operations associated with the construction of the new embankment in accordance with the contract drawings and these specifications. These operations include, but are not limited to ditching, preparation of foundation, obtaining suitable borrow material and placing and grading the new embankment in accordance with the contract drawings and these specifications.

1.2 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 C 136 (2006) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM D 1140 (2000; R 2006) Amount of Material in Soils Finer than the No. 200 (75-micrometer) Sieve

ASTM D 1556 (2007) Density and Unit Weight of Soil in Place by the Sand-Cone Method

ASTM D 2487 (2006e1) Soils for Engineering Purposes (Unified Soil Classification System)

ASTM D 2937 (2004) Density of Soil in Place by the Drive-Cylinder Method

ASTM D 422 (1963; R 2007) Particle-Size Analysis of Soils

ASTM D 4318 (2005) Liquid Limit, Plastic Limit, and Plasticity Index of Soils

ASTM D 698 (2007e1) Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/cu. ft. (600 kN-m/cu. m.))

1.3 SUBMITTALS

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

SECTION 31 01 00 Page 2 submittals not having a "G, A" designation are for information only. When used, a designation following the "G, A" 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-03 Product Data

Heavy Equipment

Prior to bringing heavy equipment onsite, the Contractor shall provide the Contracting Officer and/or his or her designated representative with a list of and a data sheet for each piece of heavy equipment to be used.

1.4 DEFINITIONS

1.4.1 Raised Embankment

The raised embankment is the raise of the dike at the existing dredge Disposal Areas #16, #19 and #21 to be constructed by the Contractor as shown on the plans.

1.4.2 Excavated Material

Excavated Material consists of the material to be excavated for borrow material and as indicated on the drawings

1.4.3 Satisfactory Material

Satisfactory materials shall be limited to materials obtained from designated borrow sources that are free from debris, vegetation, and stones larger than 3 inches in any dimension. Soils classified as SM, SC, SP, SP-SM, SW-SM, SW-SC, SP-SC, CL, and ML in ASTM D 2487 are satisfactory for new dike embankment.

1.4.4 Unsatisfactory Materials

a. Materials classified in ASTM D 2487 as CH, MH, SW, GW, GP, GM, GC, OL, OH, and Pt are unsatisfactory. Materials which do not comply with the requirements for satisfactory materials are unsatisfactory.

Unsatisfactory materials also include man-made fills, trash, refuse, backfills from previous construction, and material classified as satisfactory which contains roots and other objectionable quantities of vegetative materials. Notify the Contracting Officer and/or his or her designated representative when encountering any contaminated materials.

b. Materials determined by the Contracting Officer and/or his or her designated representative as too wet or too soft to provide a stable subgrade, foundation, fill or backfill will be classified as unsatisfactory. However, if it is possible to condition such materials to provide a stable subgrade, foundation, fill, or backfill, the Contractor shall at no additional cost to the Government, recondition the materials.

Stone, cobbles, or rock fragments over 3 inches in any dimension; all debris; and all pure vegetative matter are considered unsatisfactory.

1.4.5 Degree of Compaction

Degree of compaction required is expressed as a percentage of the maximum density obtained by the test procedure presented in ASTM D 698 abbreviated as a percentage of laboratory maximum density.

SECTION 31 01 00 Page 3

1.5 GENERAL PROVISIONS

1.5.1 Lines and Grades

The raised embankment shall be constructed to the lines, grades and cross sections indicated on the drawings within the specified tolerances, unless otherwise directed by the Contracting Officer and/or his or her designated representative. At all points a tolerance of 1 foot above the prescribed grade and cross-section will be permitted in the placement and final dressing, provided that all excess material is so distributed that the upper surface of the embankment drains, there are no abrupt humps or depressions in surfaces, and the side slopes are not steeper than specified. Additional fill placement due to settlement of the new embankment during construction shall be anticipated by the Contractor.

1.5.2 Conduct of the Work

If, in the opinion of the Contracting Officer and/or his or her designated representative, the equipment causes horizontal shearing, rutting, pumping, heaving, cracking or excessive deformation of the raised embankment or existing dike, the Contractor shall limit the type, load or travel speed of the equipment at no additional cost to the Government. For stability purposes, excavation closer than 30 feet of the inside toe of any existing dike and 30 feet of the inside toe of the new embankment is not allowed.

The Contractor shall utilize the inside of Disposal Areas #16, #19 and #21 to obtain borrow material. He shall conduct his borrow operations in such a way so as to maintain drainage toward the spillway(s) at all times. The Government expects sufficient borrow to be available for construction of the new dike embankment at each of the disposal areas.

1.6 EQUIPMENT

The Contractor shall utilize whatever equipment is necessary to safely accomplish the work required without causing shearing, rutting, and/or failure of the raised and existing dike. The Contractor shall be prepared to deal with very soft ground conditions as well as very sandy conditions that likely exist at the site.

1.7 MEASUREMENT AND PAYMENT

The quantities for payment of embankment shall be computed using the average end area method as determined form the original and final cross sections specified in SECTION 01 10 00.10 38 SUPPLEMENTARY SPECIAL CONTRACT REQUIREMENTS. Payment for the raised embankment, in accordance with the typical sections and cross sections shown on the drawings will be at the appropriate contract unit price per cubic yard under "DIKE EMBANKMENT" for each disposal area as listed in the BIDDING SCHEDULE. Payment will not be made for raised embankment placed above the allowable overbuild section.

Measurement and Payment for slope failures caused through no fault or negligence of the Contractor will be made by the cubic yard. Payment for such slope failures will be included in the contract unit price for "DIKE

EMBANKMENT".

SECTION 31 01 00 Page 4

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Dike Embankment

The borrow material required for fill and/or backfill shall be obtained from within the disposal areas provided that it meets the requirements for satisfactory material. The materials available within the disposal areas are the result of previous dredging operations and consist predominantly of sand and sand with silt soils interbedded with silt and clay layers and overlying marsh deposits with organics. Rock and/or debris materials are not expected to be encountered in any significant concentration. No excavation will be allowed within certain areas where defined and shown on the drawings. All borrow area side slopes shall not be steeper than 1 vertical on 3 horizontal, regardless of location. Suitable satisfactory materials shall be used as required for fill in dike embankments. High plasticity materials which are too wet and soft to operate equipment are not satisfactory for use in embankment construction. Only suitable satisfactory materials shall be used for fill in dike embankments.

Unsatisfactory materials shall be wasted elsewhere in the disposal area, in an area already used or not to be used.

2.1.2 Cohesionless and Cohesive Materials

Cohesionless materials include materials classified in ASTM D 2487 as GW, GP, SW, and SP. Cohesive materials include materials classified as GC, SC, ML, CL, MH, and CH. Materials classified as GM and SM will be identified as cohesionless only when the fines are non-plastic. Testing required for classifying materials shall be in accordance with ASTM D 2487, ASTM D 4318, ASTM C 136, ASTM D 422, and ASTM D 1140.

2.1.3 Subsurface Data

Soil boring logs and laboratory data are appended to these specifications in Appendices A through F. This data represents the best subsurface information, however variations may exist between boring locations and due to other factors.

PART 3 EXECUTION

3.1 BORROW AREA

Material for the construction of the raised embankment may be obtained from within Disposal Areas #16, #19 and #21 provided that it meets the requirements for satisfactory material for the intended purpose. Any unsuitable or unsatisfactory material obtained from within Disposal Areas #16, #19 and #21 shall be returned thereto.

3.2 FOUNDATION PREPARATION

The Contractor shall clear raised embankment footprint area(s) as specified in Section 31 11 00.10 CLEARING AND GRUBBING. All equipment operating on this area shall meet the requirements of paragraph EQUIPMENT. All holes, depressions, ruts, and ditches 6 inches in depth or greater shall be filled in flush with the ground surface using satisfactory material as directed by the Contracting Officer and/or his or her designated representative.

SECTION 31 01 00 Page 5

3.3 PLACEMENT

3.3.1 Dike Embankment

Satisfactory material shall be placed completely and uniformly over each section of the fill in loose, approximately horizontal lifts not exceeding 10 inches in thickness, shaped so that it will conform to the applicable cross section shown on the drawings and compacted as specified. The compacted surface of any layer shall be loosened by discing, or by any other approved method, to allow a proper bond between the lower layer and the succeeding layer placed thereon. The Contractor shall fill in all ruts in the embankment surface as directed by the Contracting Officer and/or his or her designated representative. Fill material shall not be placed in any area until such areas have been approved by the Contracting Officer and/or his or her designated representative. Fill shall not be placed upon a frozen surface, nor shall snow, ice, or frozen earth be incorporated in the new embankment. As soon as practicable, after commencement of each section of the new embankment, the surface shall be graded so that it will drain freely and shall be so maintained throughout construction.

3.4 COMPACTION

New dike fill shall be compacted to 95% of the laboratory maximum density for cohesionless materials and 90% of the laboratory maximum density for cohesive materials during the construction of the new dike embankment at Disposal Areas #16, #19 and #21. Compaction shall be accomplished by sheepsfoot rollers, pneumatic-tired rollers, steel-wheeled rollers, vibratory compactors, or other approved equipment.

3.5 SLOPE FAILURES

In the event of slope failures in any part of the new or existing embankments prior to final acceptance of the work, the Contractor shall remove material from the slope failure area, as directed by the Contracting Officer and/or his or her designated representative, and rebuild such portion of the embankment. In case it is determined that the slope failure was caused through the fault or negligence of the Contractor, the removal and disposal of material and the rebuilding of the embankment shall be performed without cost to the Government; otherwise this work will be paid for as specified in paragraph MEASUREMENT AND PAYMENT.

3.6 TESTING

Testing shall be performed by an approved commercial testing laboratory or by the Contractor subject to approval by the Contracting Officer and/or his or her designated representative. If the contractor elects to establish testing facilities, no work requiring testing will be permitted until the Contractor's facilities have been inspected and approved by the Contracting Officer and/or his or her designated representative. Determine field in-place density in accordance with ASTM D 1556. ASTM D 2937, the Drive Cylinder Method, may be used only for soft, fine-grained, cohesive soils.

When test results indicate, as determined by the Contracting Officer and/or his or her designated representative, that compaction is not as specified, remove the material, replace and recompact to meet specification requirements. Perform tests on recompacted areas to determine conformance with specification requirements. Inspections and test results shall be certified by a registered professional engineer. These certificates shall state that the test and observations were performed by or under the direct supervision of the engineer and that the results are representative of the

SECTION 31 01 00 Page 6 materials or conditions being certified by the test. Testing shall be performed separately for each site. The following number and type of preceding tests will be the minimum acceptable.

3.7 FILL AND BACKFILL MATERIAL GRADATION

One test per five thousand (5,000) cubic yards stockpile or in-place source material and at change in material type. Gradation of fill and backfill material shall be determined in accordance with ASTM D 422.

3.8 IN-PLACE DENSITIES AND MOISTURE CONTENTS

(a) One test per ten thousand (10,000) square feet, or fraction thereof, of each lift of fill or backfill area compacted by other then hand-operated machines.

(b) One test per five hundred (500) square feet, or fraction thereof, of each lift of fill or backfill areas compacted by hand-operated machines.

3.9 MOISTURE CONTENTS

In the stockpile, excavations, or borrow area, a minimum of two test per day per type of material or source of material being placed during stable weather conditions shall be performed. During unstable weather, tests shall be made as dictated by local conditions and approved by the Contracting Officer and/or his or her designated representative.

3.10 OPTIMUM MOISTURE AND LABORATORY MAXIMUM DENSITY

Sufficient testing shall be performed for each type material or source of borrow material to determine the optimum moisture and laboratory maximum density values. The Contractor shall conduct a minimum of one representative test per change in soil type to be used as borrow or backfill.

3.11 GRADING

Upon completion of spillway system replacements, new dike embankment work and borrow area activities, the interior of the diked disposal area shall be graded to provide positive drainage to the spillway structures. There shall be no low spots or depressions remaining within the diked areas at Disposal Areas 16, 19 and 21.

-- End of Section --

SECTION 31 01 00 Page 7