08-R-0002 0008.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

CLEARWATER MAJOR REHAB PROJECT PHASE II - CUTOFF WALL CONSTRUCTION

Solicitation W9127S-08-R-0002 is amended as show n on the follow ing pages.

1. CONTRACT ID CODE PAGE OF PAGES

J

FAR (48 CFR) 53.243

1 2

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

16C. DATE SIGNED

BY 18-Jul-2008

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 W9127S-08-R-0002

X 9B. DATED (SEE ITEM 11)

01-May-2008

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

18-Jul-2008

CODE

CONTRACTING DIVISION

USACE, LITTLE ROCK (W9127S)

700 W. CAPITOL AVE, RM 7315

LITTLE ROCK AR 72201-3225

W9127S 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W9127S-08-R-0002

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

AMENDMENT 0008

The following Sections are revised and replaced in their entirety:

01 33 00 Submittal Procedures 31 56 00.1 Cutoff Wall Excavation and Construction

The following file replaces the submittal register included in 01 00 50:

01 00 50_01 33 00 Submittal Register

The following drawings are revised and replaced in their entirety:

bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-101.1.pdf bco4-2c-102.1.pdf bco4-2c-103.1.pdf bco4-2c-105.1.pdf bco4-2c-108_1.pdf bco4-2c-109.1.pdf bco4-2c-110.1.pdf bco4-2c-111.1.pdf bco4-2c-112.1.pdf bco4-2c-113.1.pdf bco4-2c-114.1.pdf bco4-2c-115.1.pdf bco4-2c-116.1.pdf

NOTE: Clause 252.232-7003 ELECTRONIC SUBMISSION OF PAYMENT REQUESTS AND RECEIVING REPORTS (MAR 2008) was included in Amendment 0007. However, at this time the Corps of Engineers is still in the process of implementing this procedure. Therefore, the contractor will be notified at such time as this procedure is required.

EVERYTHING ELSE REMAINS UNCHANGED.

SECTION 01 33 00

SUBMITTAL PROCEDURES

04/06

PART 1 GENERAL

1.1 DEFINITIONS

1.1.1 Submittal

Contract Clauses "FAR 52.236-5, Material and Workmanship," paragraph (b) and "FAR 52.236-21, Specifications and Drawings for Construction," paragraphs (d), (e), and (f) apply to all "submittals."

1.1.2 Submittal Descriptions (SD)

Submittals requirements are specified in the technical sections. Submittals are identified by SD numbers and titles as follows.

SD-01 Preconstruction Submittals

Submittals which are required prior to the “Construction Notice to Proceed” (CNTP) on a new contract. Submittals required prior to the start of the next major phase of the construction on a multi-phase contract. Schedules or tabular list of data or tabular list including location, features, or other pertinent information regarding products, materials, equipment, or components to be used in the work, submitted prior to “Construction Notice to Proceed” (CNTP) or next major phase of construction.

Certificates of insurance.

Surety bonds.

List of proposed subcontractors.

List of proposed products.

Construction Progress Schedule.

Submittal register.

Schedule of prices.

Health and safety plan.

Work plan.

Quality control plan.

Environmental protection plan.

SD-02 Shop Drawings

Drawings, diagrams and schedules specifically prepared to illustrate some portion of the work.

Diagrams and instructions from a manufacturer or fabricator for use in producing the product and as aids to the Contractor for integrating the product or system into the project.

Drawings prepared by or for the Contractor to show how multiple systems and interdisciplinary work will be coordinated.

SD-03 Product Data

SECTION 01 33 00 - Page 1 of 9

Catalog cuts, illustrations, schedules, diagrams, performance charts, instructions and brochures illustrating size, physical appearance and other characteristics of materials, systems or equipment for some portion of the work.

Samples of warranty language when the contract requires extended product warranties.

SD-04 Samples

Fabricated or unfabricated physical examples of materials, equipment or workmanship that illustrate functional and aesthetic characteristics of a material or product and establish standards by which the work can be judged.

Field samples and mock-ups constructed on the project site establish standards by which the ensuring work can be judged. Includes assemblies or portions of assemblies which are to be incorporated into the project and those which will be removed at conclusion of the work.

SD-05 Design Data

Design calculations, mix designs, analyses or other data pertaining to a part of work.

SD-06 Test Reports

Report signed by authorized official of testing laboratory that a material, product or system identical to the material, product or system to be provided has been tested in accord with specified requirements. (Testing must have been within three years of date of contract award for the project.)

Report which includes findings of a test required to be performed by the Contractor on an actual portion of the work or prototype prepared for the project before shipment to job site.

Report which includes finding of a test made at the job site or on sample taken from the job site, on portion of work during or after installation.

Investigation reports.

Daily logs and checklists.

Final acceptance test and operational test procedure.

SD-07 Certificates

Statements printed on the manufacturer's letterhead and signed by responsible officials of manufacturer of product, system or material attesting that product, system or material meets specification requirements. Must be dated after award of project contract and clearly name the project.

SECTION 01 33 00 - Page 2 of 9

Document required of Contractor, or of a manufacturer, supplier, installer or subcontractor through Contractor, the purpose of which is to further quality of orderly progression of a portion of the work by documenting procedures, acceptability of methods or personnel qualifications.

Confined space entry permits.

Text of posted operating instructions.

SD-08 Manufacturer's Instructions

Preprinted material describing installation of a product, system or material, including special notices and Material Safety Data sheets concerning impedances, hazards and safety precautions.

SD-09 Manufacturer's Field Reports

Documentation of the testing and verification actions taken by manufacturer's representative at the job site, in the vicinity of the job site, or on a sample taken from the job site, on a portion of the work, during or after installation, to confirm compliance with manufacturer's standards or instructions. The documentation must be signed by an authorized official of a testing laboratory or agency and must state the test results; and indicate whether the material, product, or system has passed or failed the test.

SD-10 Operation and Maintenance Data

Data that is furnished by the manufacturer, or the system provider, to the equipment operating and maintenance personnel. This data is needed by operating and maintenance personnel for the safe and efficient operation, maintenance and repair of the item.

This Data is intended to be incorporated in an operations and maintenance manual or control system.

SD-11 Closeout Submittals

Documentation to record compliance with technical or administrative requirements or to establish an administrative mechanism.

Special requirements necessary to properly close out a construction contract. For example, Record Drawings, manufacturer's help and product lines necessary to maintain and install equipment. Also, submittal requirements necessary to properly close out a major phase of construction on a multi-phase contract.

1.1.3 Approving Authority

Office or designated person authorized to approve submittal.

SECTION 01 33 00 - Page 3 of 9

1.1.4 Work

As used in this section, on and off-site construction required by contract documents, including labor necessary to produce submittals, construction, materials, products, equipment, and systems incorporated or to be incorporated in such construction.

1.2 SUBMITTALS

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

submittals not having a "G" designation are for information only or as otherwise designated. 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 this Section:

Submittal Register; G

1.3 SUBMITTAL CLASSIFICATION

Submittals are classified as follows:

1.3.1 Design Submittals

Administrative Contracting Officer review is required for all design.

Government review will be for conformance with the technical requirements of the solicitation and shall take place on all design submittals. SECTION 01 33 16, DESIGN SUBMISSION REQUIREMENTS AFTER AWARD covers the design submittals for the segmental concrete block retaining wall, work platform, slurry pond disposal and haul roads and review process in detail.

1.3.2 Construction Submittals

1.3.2.1 Government Approved

Government approval is required for extensions of design, critical materials, deviations, equipment whose compatibility with the entire system must be checked, and other items as designated by the Contracting Officer.

Within the terms of the Contract Clause entitled "Specifications and Drawings for Construction," they are considered to be "shop drawings."

1.3.2.2 Information Only

All submittals not requiring Government approval will be for information only. They are not considered to be "shop drawings" within the terms of the Contract Clause referred to above.

1.4 APPROVED SUBMITTALS

The Contracting Officer's approval of submittals shall not be construed as a complete check, but will indicate only that the design and/or general method of construction, materials, detailing and other information are satisfactory. Approval will not relieve the Contractor of the

SECTION 01 33 00 - Page 4 of 9 responsibility for any error which may exist, as the Contractor under the Design and/or the Contractor Quality Control (CQC) requirements of this contract is responsible for design, dimensions, all the design extensions such as the design of adequate connections and details, and the satisfactory construction of all work. After submittals have been approved by the Contracting Officer, no re-submittal for the purpose of substituting materials or equipment will be considered unless accompanied by an explanation of why a substitution is necessary.

1.5 DISAPPROVED SUBMITTALS

The Contractor shall make all corrections required by the Contracting Officer's Representative, obtain the Designer of Record's approval, and promptly furnish a corrected submittal in the form and number of copies specified for the initial submittal. If the Contractor considers any correction indicated on the submittals to constitute a change to the contract, a notice in accordance with the Contract Clause "Changes" shall be given promptly to the Contracting Officer. Any "information only" submittal found to contain errors or unapproved deviations from the Solicitation or Accepted Proposal shall be resubmitted as one requiring "approval" action, requiring both Designer of Record and Government approval. If the Contractor considers any correction indicated by the Government on the submittals to constitute a change to the contract, a notice in accordance with the contract Clause "Changes" shall be given promptly to the Contracting Officer's Representative.

1.6 WITHHOLDING OF PAYMENT

Payment for materials incorporated in the work will not be made if required approvals have not been obtained.

1.7 DESIGN ENGINEER OF RECORD (EOR) APPROVED

Approval authorization applies to individuals who have professional design responsibility for certain features of a project involving one or more engineering and design discipline, e.g., architectural, structural, civil, electrical, and professional accountability. Approval is required for structural steel connections, extensions of design, deviations to the contract documents, and other items as designated by the Contracting Officer's Representative. Within the terms of the Contract Clause entitled "Specifications and Drawings for Construction," such submittals are considered to be "shop drawings." The Contractor shall provide the Government the number of copies designated in paragraph 1.9.1 Submital Register, of all Designer of Record approved submittals. The Government may review any or all Designer of Record approved submittals for conformance to the Solicitation and Accepted Proposal. The Government will review all submittals designated as deviating from the Solicitation or Accepted Proposal, as described below.

1.8 GOVERNMENT REVIEWED DESIGN

Government review is required for extension of design construction submittals. Review will be only for conformance with the contract requirements. Included are only those construction submittals for which the Design Engineer of Record design documents do not include enough detail to

SECTION 01 33 00 - Page 5 of 9 ascertain contract compliance. Government review shall not remove or replace Design EOR design responsibility.

1.9 DESIGN SUBMITTALS

The Contractor shall provide design documents submittals in accordance with

SECTION 01 33 16, DESIGN SUBMISSION REQUIREMENTS AFTER AWARD.

1.9.1 Submittal Register (ENG Form 4288)

The Contractor's Designer(s) of Record shall develop a complete list of submittals required during construction. The Designer of Record shall identify required submittals in the specifications. The list is to be used in preparing ENG Form 4288 Submittal Register or a computerized equivalent.

The list is not all inclusive and additional submittals may be required by other parts of the contract. The Contractor is required to complete ENG Form 4288, attached at the end of SECTION 01 00 50 FORMS AND ATTACHMENTS, (including columns "a" through "r") in QCS/RMS and submit to the Contracting Officer for approval within 30 calendar days after Notice to Proceed. The approved submittal register will serve as a scheduling document for submittals and will be used to control submittal actions throughout the contract period. The submit dates and need dates used in the submittal register shall be coordinated with dates in the contractor prepared progress schedule. Updates to the submittal register showing the contractor action codes and actual dates with government action codes and actual dates shall be submitted monthly or until all submittals have been satisfactorily completed. When the progress schedule is revised, the submittal register shall also be revised and both submitted for approval.

1.10 CONSTRUCTION SUBMITTALS

1.10.1 General

The Contractor shall make submittals as required by the specifications. The Contracting Officer may request submittals in addition to those specified when deemed necessary to adequately describe the work covered in the respective sections. Units of weights and measures used on all submittals shall be the same as those used in the contract drawings. Each submittal shall be complete and in sufficient detail to allow ready determination of compliance with contract requirements. Prior to submittal, all items shall be checked and approved by the Contractor's Quality Control (CQC) System Manager and each item shall be stamped, signed, and dated by the CQC System Manager indicating action taken. Proposed deviations from the contract requirements shall be clearly identified. Submittals shall include items such as: Contractor's, manufacturer's, or fabricator's drawings;

descriptive literature including (but not limited to) catalog cuts, diagrams, operating charts or curves; test reports; test cylinders; samples;

O&M manuals (including parts list); certifications; warranties; and other such required submittals. Submittals requiring Government approval shall be scheduled and made prior to the acquisition of the material or equipment covered thereby. Samples remaining upon completion of the work shall be picked up and disposed of in accordance with manufacturer's Material Safety Data Sheets (MSDS) and in compliance with existing laws and regulations.

Amend#0008

SECTION 01 33 00 - Page 6 of 9

1.10.2 Submittal Register

At the end of SECTION 01 00 50 FORMS AND ATTACHMENTS is a submittal register showing items of equipment and materials for which submittals are required by the specifications; this list may not be all inclusive and additional submittals may be required. The Contractor shall maintain a submittal register for the project in accordance with SECTION 01 45 01.10 USACE

QUALITY CONTROL SYSTEM (QCS).

1.11 SCHEDULING

Submittals covering component items forming a system or items that are interrelated shall be scheduled to be coordinated and submitted concurrently. Certifications to be submitted with the pertinent drawings shall be so scheduled. Adequate time (a minimum of 30 calendar days exclusive of mailing time) shall be allowed and shown on the register for review and approval. No delay damages or time extensions will be allowed for time lost in late submittals.

1.12 TRANSMITTAL FORM (ENG FORM 4025)

The sample transmittal form (ENG Form 4025) attached to the end of SECTION 01 00 50 FORMS AND ATTACHMENTS shall be used for submitting both Government approved and information only submittals in accordance with the instructions on the reverse side of the form. These forms are included in the QCS software that the Contractor is required to use for this contract. This form shall be properly completed by filling out all the heading blank spaces and identifying each item submitted. Special care shall be exercised to ensure proper listing of the specification paragraph and/or sheet number of the contract drawings pertinent to the data submitted for each item.

1.13 SUBMITTAL PROCEDURES

Submittals shall be made as follows:

1.13.1 Procedures

For Information Only - Submit 3 copies to US Army Corps of Engineers, Construction Branch, 700 West Capitol, Little Rock Arkansas, 72203-0867 (except for those items that the Resident Office is the primary reviewer) and one information copy to the Resident Office, Corps of Engineers, RR3, Box 35591, Highway HH, Piedmont, MO 63957 (Reverse if Resident Office is the primary reviewer). One copy will be returned to Contractor. Resident Office only submittals will be indicated on RMS.

Government Approved – Submit 5 copies to US Army Corps of Engineers, Construction Branch, 700 West Capitol, Little Rock Arkansas, 72203-0867 and one copy to the Resident Office, Corps of Engineers, RR3, Box 35591, Highway HH, Piedmont, MO 63957. (Reverse if CAAO is the primary reviewer). One copy will be returned to Contractor.

Contractor shall establish an ftp site and post each submittal on it for easy access by all parties. Information about ftp site including location and instructions on accessing shall be provided by Contractor at

SECTION 01 33 00 - Page 7 of 9 preconstruction conference. The Government will further discuss detailed submittal procedures with the Contractor at the Preconstruction Conference.

1.13.2 Deviations

For submittals which include proposed deviations requested by the Contractor, the column "variation" of ENG Form 4025 shall be checked. The Contractor shall set forth in writing the reason for any deviations and annotate such deviations on the submittal. The Government reserves the right to rescind inadvertent approval of submittals containing unnoted deviations.

1.13.3.5 Samples

All samples of materials submitted as required by these specifications shall be properly identified and labeled for ready identification.

1.13.4 Certificates of Compliance

Any Certificates required for demonstrating proof of compliance of materials with specification requirements shall be executed in two paper copies and one electronic copy. Each certificate shall be signed by an official authorized to certify in behalf of the manufacturing company and shall contain the name and address of the Contractor, the project name and location, and the quantity and date or dates of shipment or delivery to which the certificates apply. Copies of laboratory test reports submitted with certificates shall contain the name and address of the testing laboratory and the date or dates of the tests to which the report applies.

Certification shall not be construed as relieving the Contractor from furnishing satisfactory material, if after tests are performed on selected samples, the material is found not to meet the specific requirements.

1.14 CONTROL OF SUBMITTALS

The Contractor shall carefully control his procurement operations to ensure that each individual submittal is made on or before the Contractor scheduled submittal date shown on the approved "Submittal Register."

1.15 GOVERNMENT APPROVED SUBMITTALS

Upon completion of review of submittals requiring Government approval, the submittals will be identified as having received approval by being so stamped and dated. Five copies of the submittal will be retained by the Contracting Officer and one copy of the submittal will be returned to the Contractor. If the Contractor needs more than one copy, additional copies shall be submitted.

1.16 INFORMATION ONLY SUBMITTALS

Normally submittals for information only will not be returned. Approval of the Contracting Officer is not required on information only submittals.

The Government reserves the right to require the Contractor to resubmit any item found not to comply with the contract. This does not relieve the Contractor from the obligation to furnish material conforming to the plans and specifications; will not prevent the Contracting Officer from requiring

SECTION 01 33 00 - Page 8 of 9 removal and replacement of nonconforming material incorporated in the work;

and does not relieve the Contractor of the requirement to furnish samples for testing by the Government laboratory or for check testing by the Government in those instances where the technical specifications so prescribe.

All information purposes only submittals that contain a variation will automatically convert to government approved submittal.

1.17 PAYMENT

No separate payment will be made for the work covered under this section.

The costs thereof shall be included in the item to which the work pertains.

1.18 STAMPS

Stamps used by the Contractor on the submittal data to certify that the submittal meets contract requirements shall be similar to the following:

| CONTRACTOR |

| (Firm Name) | | _____ Approved | | _____ Approved with corrections as noted on submittal data and/or | | attached sheets(s). |

| SIGNATURE: __________________________________________________________ |

| TITLE: ______________________________________________________________ |

| DATE: _______________________________________________________________ |

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

-- End of Section -

SECTION 01 33 00 - Page 9 of 9

SECTION 31 56 00.1

CUTOFF WALL EXCAVATION AND CONSTRUCTION

PART 1 GENERAL

The specifications in this section are intended as guide specifications although they do identify the minimum conditions of acceptability for construction of the wall. They are not intended to restrict innovation in the Contractor’s approach to the excavation and construction of a continuous concrete cutoff wall. Regardless of approach taken, the Contractor shall either incorporate these specifications in his proposal or propose alternative specifications. If the Contractor proposes alternatives, the proposal shall clearly denote these. It shall also include a justification for why the Contractor believes his/her alternative to be superior or more stringent than these guide specifications.

The Offerer’s proposal shall address short and long term stability of the cutoff wall particularly where the wall spans openings in the rock mass to withstand loading generated by the reservoir and soil upstream of the wall.

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.

AMERICAN PETROLEUM INSTITUTE (API)

API RP 13B-1 (2003) Standard Procedure for Field Testing

Water-Based Drilling Fluids

API RP 13B-2 (2005) Field Testing Oil-Based Drilling

Fluids

API Spec 13A (2006) Drilling-Fluid Materials

ASTM INTERNATIONAL (ASTM)

ASTM D 2113 (2006) Rock Core Drilling and Sampling of

Rock for Site Investigation

ASTM C 42/C 42M (2004) Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

U.S. ARMY CORPS OF ENGINEERS (USACE)

ER 1110-1-1807 (2006) Procedures for Drilling in Earth

Embankments

ER 1110-1-1901 (1999) Project Geotechnical and Concrete

Materials Completion Report for Major USACE Projects

SECTION 31 56 00.1 Page 1 of 29

1.2 OTHER INFORMATION

Borings made in the general vicinity of the work, and additional investigations at the site, were performed by the Government. These records include, in addition to the information described elsewhere in these specifications, generalized design data that may be of interest to the Contractor. Foundation reports, historical documents, instrumentation data, boring logs, laboratory test results, summaries of recent grouting and permeability testing data and other documentation relating to the structure are provided electronically for review. Each bidder must confirm that he has studied all these data prior to preparing their bid. Rock cores and soil samples will be available for inspection and viewing during the Pre-Bid Meeting held at the project site. Additional historical information about the dam and recent construction projects is located in SECTION 01 14 00.1

PROJECT INFORMATION.

1.3 MEASUREMENT AND PAYMENT

All work and associated costs of work specified herein shall be measured and paid for in accordance with this paragraph and subsequent subparagraphs.

Payment will constitute full compensation for all work specified in individual items including construction, labor, materials, and all incidental work. Payment for items measured in planar square feet, within the boundaries of the cutoff wall depicted in the plans, will constitute full compensation for construction to the specified dimensions. No additional payment will be made for square footage in excess of the depicted cutoff wall boundaries, unless authorized by the Contracting Officer. No additional payment will be made for over-excavation or backfill of over-excavation necessary to accommodate the Contractor's equipment, the wall being out of verticality or for re-drilling/re-excavation because of misalignment or inferior concrete. Construction and maintenance of the disposal area shall be incidental to the cutoff wall installation without additional payment.

1.3.1 Cutoff Wall Construction in Overburden/Epikarst

1.3.1.1 Payment

Cutoff wall construction in Overburden/Epikarst will be paid based on completed cutoff wall constructed in accordance with these specifications from the surface of the work platform to the “Top of Rock” line as shown on the plans from Station 13+70 to Station 34+00 and from Station 53+50 to Station 54+50. No separate payment will be made for the overlapping segments of the wall construction. The payment includes costs for soil modification above top of rock required to assure a stable trench, slurry wall and cutoff wall.

1.3.1.2 Measurement

Measurement for payment will be made based on the number of planar square feet of completed cutoff wall measured along the alignment of the wall as shown on the plans. With respect to the overlap between elements, the portion of the element excavated to create the overlap will not be measured

SECTION 31 56 00.1 Page 2 of 29 for payment. Soil modification for stabilization, which the bidder may select to implement as part of his means and methods, will not be measured for payment.

1.3.1.3 Unit of Measure

Unit of Measure: planar square foot.

1.3.2 Cutoff Wall Construction in Embankment Material

1.3.2.1 Payment

Cutoff wall construction in Embankment material will be paid for the completed cutoff wall constructed in accordance with these specifications from the surface of the work platform to the “Top of Rock” line as shown on the plans from Station 34+00 to Station 53+50. The payment includes costs for soil modification above the top of rock required to assure a stable trench, slurry wall and cutoff wall.

1.3.2.2 Measurement

feet of completed cutoff wall as shown on the plans. With respect to the overlap, the portion of the element excavated to create the overlap will not be measured for payment. Soil modification for stabilization, which the bidder may select to implement as part of his means and methods, will not be measured for payment.

1.3.2.3 Unit of Measure

1.3.3 Cutoff Wall Construction in Rock

1.3.3.1 Payment

Cutoff wall construction in Rock will be paid for the completed cutoff wall constructed in accordance with these specifications and below the “Top of Rock” line as shown on the plans from Station 13+70 to Station 54+50. All other cutoff wall excavation will be measured as being in the embankment material and overburden/epikarst materials. Soil-like material encountered below the top of rock line shall be classified as rock excavation. Payment will include costs associated with achieving wall stability in the rock and through non-rock intervals in the rock mass.

1.3.3.2 Measurement

feet of completed cutoff wall as shown on the plans. With respect to the overlap, the portion of the element excavated to create the overlap will not be measured for payment. No separate measurement will be made for wall stabilization work in the rock mass and through non-rock intervals.

1.3.3.3 Unit of Measure

SECTION 31 56 00.1 Page 3 of 29

1.3.4 Sand for Emergency Backfill

1.3.4.1 Payment

Payment will made for all sand materials needed for emergency placement to control sudden loss of slurry.

1.3.4.2 Measurement

Sand will be measured for payment based on the total number of cubic yards of material used and/or kept on site to control emergency slurry loss.

1.3.4.3 Unit Measure

Unit of Measure: cubic yards.

1.3.5 Disposal

No separate measurement or payment shall be made for modifications or enlargements of the disposal area shown in the plans. Costs for the design, construction and maintenance of the disposal area shall be incidental to the item, Cutoff Wall Construction in Overburden/Epikarst, Cutoff Wall Construction in Embankment Material, and Cutoff Wall Construction in Rock.

Payment includes maintenance of the structure, environmental monitoring, solidification/treatment of the disposed material and restoration of the disposal area upon completion of the project.

1.4 DEFINITIONS

1.4.1 Embankment Soils

The embankment consists of an inclined clay core of low to highly plastic clays and silts, with exterior pervious shells consisting of clay, silt, sand, gravel, cobbles and boulders. Special care must be taken excavating the pervious shell material due to the concern of caving of this material.

The embankment through the valley section of the dam was constructed on alluvial soils of clay, sands, silts, and gravels overlying the foundation bedrock. The core trench was excavated through the alluvial material approximately 40-feet thick from Station 34+00 to Station 53+50 and the clay core was placed in the core trench directly on the foundation rock or on concrete placed within the core trench. The upstream slope of the embankment is covered with an impervious clay blanket approximately five feet thick underlain by stone protection (maximum size 24” diameter) approximately three feet thick. The cutoff wall will penetrate through the upstream pervious shell, the inclined clay core and into the foundation rock in the core trench from Station 34+00 to Station 53+50. Index and physical properties of the embankment materials, overburden soils, and bedrock are provided in the historical documentation provided with these specifications.

1.4.2 Abutment Overburden/Epikarst

The left and right abutments consist of residual soils (predominantly clay) and weathered to highly weathered dolomite (epikarst). Epikarst is defined

SECTION 31 56 00.1 Page 4 of 29 as the interval between the mostly unaltered bedrock and the overlying residual soils. The epikarst consists of weathered to highly weathered dolomite, floating rock (rock that has been detached from the bedrock) clay filled joints and is pinnacled within the abutments. The top of rock is highly varied in both abutments due to weathering and solution of the bedrock. The abutments have taken large amounts of grout during the currently ongoing grouting program. The residual soils and epikarst were drilled with an Interoc AN-160 Rotary Duplex Auger Drill.

1.4.3 Alluvial Material

All material overlying the rock foundation and underlying the embankment in the valley section of the dam, except for the core trench, is alluvial material. This material is comprised mostly of reworked residual clay and alluvial clay, silt, sand, gravel and various mixtures of these soil types.

The alluvial material is both upstream and downstream of the core trench and the centerline of the proposed cutoff wall.

1.4.4 Foundation Rock

The foundation rock is defined as bedrock, which underlies the embankment materials and the abutment overburden/epikarst. The upper occurrence of dolomite bedrock is considered top of rock, as shown on the plans, for the purpose of the Offeror’s proposal.

These materials listed above are described in more detail in SECTION 01 14

00.1 PROJECT INFORMATION and in the historical documents provided with these specifications.

1.4.5 Trench.

A trench is the excavation opening made for the placement of the concrete for the cutoff wall. The trench shall be wide enough to provide for the construction of a 24-inch wide completed concrete cutoff wall.

1.4.6 Element

An element is an excavation created by a single vertical pass of machinery.

The term is applicable to either secant pile or mill method.

1.4.7 Panel

A panel is defined as one rectangular placement of concrete cutoff wall constructed by the rock mill method consisting of several elements. In non-critical areas, the maximum panel length is 30 feet measured in plan parallel to the wall alignment before backfilling with concrete is required.

For critical areas, the maximum panel length is one element for mill excavation measured in plan parallel to the wall alignment before backfilling with concrete is required.

1.4.8 Secant Pile

SECTION 31 56 00.1 Page 5 of 29

The secant pile wall may consist of individually drilled and backfilled secant piles or a series of overlapping secant piles forming a “secant pile panel”, which are backfilled monolithically.

For critical areas the maximum secant pile panel length is five overlapping secant piles measured along the wall alignment using the secant pile method when overlapping secant piles are backfilled with concrete monolithically.

1.4.9 Joint

A joint is the area of contact between adjacent elements.

1.4.10 Overlapping Excavation

An overlapping excavation is created by the removal of concrete from an element while excavating an adjacent element.

1.4.11 Overlapping Element

An overlapping element is that portion of an element created by the removal of concrete from an adjacent element.

1.4.12 Critical Areas

A critical area is defined as an area of the cutoff wall in which the construction of the wall shall proceed with extra caution and care, regardless of the excavation method. The amount of open excavations (prior to backfilling with concrete) shall be kept to single elements using the rock mill construction method or five (5) open, overlapping secant piles using the secant pile method within these zones. Simultaneous excavations of elements by the rock mill method or overlapping secant pile method may be permitted, but no closer than 150-feet, within critical areas. Secant piles excavated and backfilled individually permit simultaneous excavations, but no closer than 50-feet.

The sinkhole area of the dam, between Station 39+00 and Station 40+50, the area between Station 31+00 to Station 34+00 and the area from Station 53+50 to Station 54+50 have been pre-designated as the critical areas of the project. The Government reserves the right to identify 100 linear feet in plan measured along the wall alignment of additional critical area at no additional cost.

These areas have been designated as critical areas based on known or suspected foundation conditions indicating higher permeabilities and variable foundation conditions. Open solution features, open fractures, voids, and clay filled cavities are among the possible features which can be expected in these critical areas. These conditions may also exist outside the designated critical areas but their occurrence is less concentrated.

1.4.13 Test Section

A Test Section is defined as a Government designated area of the cutoff wall to be excavated and constructed to provide early information for evaluation of the suitability of equipment, excavation procedures and techniques, SECTION 31 56 00.1 Page 6 of 29 operations, materials, and to allow for adjustment prior to the initiation of the excavation or construction of the remaining wall.

1.4.14 Grouting of Cutoff Wall Area

Foundation epikarst and rock grouting is underway at the project site by others and will be completed before the cutoff wall contractor will begin on site work. Two grout lines, 10-feet apart with holes on 10-feet centers, run the entire length of the proposed cutoff wall alignment. The proposed cutoff wall alignment will be between these two grout lines. These two grout lines extend approximately 100-feet deep into the foundation rock.

The epikarst in both abutments has been grouted extensively with a high marsh funnel (>100) balanced and stable grout through sleeve-port casing (tube-a-manchette). The intent of grouting the epikarst and foundation rock is to reduce the permeability and to assist with stabilization of the epikarst material for excavation. However, in no way does the Government warranty the effectiveness of the epikarst/rock grouting to prevent slurry loss and/or caving of material and the Contractor should plan for possible slurry loss in both the epikarst and the foundation rock due to the karstic nature of this material. Bidders are encouraged to review data derived from the on-going Foundation Grouting Contract, which is included in the historical documentation provided with these specifications and which will be updated via amendments. This information may be utilized by the cutoff wall Contractor to determine if any additional treatment is necessary to implement their method of construction.

1.5 PERFORMANCE REQUIREMENTS

The Government may perform quality assurance testing on the slurry/drilling materials using the laboratory and equipment furnished by the Contractor.

The Government quality assurance testing will in no way relieve the Contractor of the responsibility of performing quality control tests necessary to meet the construction requirements. The Contractor shall provide the equipment and laboratory space to government personnel and these services shall be considered a subsidiary obligation of the cutoff wall construction. All routine testing procedures being conducted by the Contractor shall be available for inspection by the Contracting Officer at any time.

1.6 SUBMITTALS

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

submittals not having a "G" designation are for information only or as otherwise designated. The submittals required herein supplement and expand those required by Section 115. The following shall be submitted in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

Plan of Operations; G, Design

A detailed work plan shall be submitted showing equipment and plant layout proposed for constructing the cutoff wall. Both primary and

SECTION 31 56 00.1 Page 7 of 29 secondary methods of construction shall be addressed. This shall include but is not limited to drawings depicting concrete batch plant, grout plant, bentonite storage area, slurry mixing handling, desanding and storage facilities, location and sizes of all stationary equipment, casings, water storage tanks, pumps, valves, lines, hoses, materials, waste areas, and all major components of this project. The Contractor shall designate equipment, maintenance and laydown areas. These layouts must conform to requirements presented in SECTION 01 57 20 ENVIRONMENTAL PROTECTION. The layouts shall also be designed to show all temporary and work platform details and the traffic management plan. The submittal shall include an equipment recovery plan to retrieve equipment and material that gets stuck or lost in the excavation.

Construction Techniques Plan; G, Design

The Contractor shall submit a plan describing proposed cutoff wall construction techniques, to include the following items:

- Description of equipment and procedures to be used to excavate the embankment, overburden and bedrock materials.

- Description of what materials will be used and the method used to keep the excavations open and insure trench stability.

- Detailed plan for preventing/stopping rapid slurry loss.

- Secant piles and/or panel elements to ensure water tight concrete-to-concrete interface over the entire length, width and depth of the cutoff wall and the minimum required continuous width of 24 inches.

- Description of equipment and procedures to be used for cleaning the interfaces and joints between the elements and bottom of the excavation.

- Procedure and schedule for measuring and maintaining wall verticality, minimum width, and continuity for approval prior to initiating construction of the wall.

- Plan for the procedure and methodology for placement of tremied concrete.

- Plan for correction for the loss of alignment or continuity.

- Plan to stabilize material above top of rock to assure trench and wall stability

- Plan to stabilize wall in non rock intervals in the rock mass.

AMEND#0008Construction Sequence; G, Design

The Contractor shall submit a schedule and sequence of work for major features of the entire construction project in accordance with Section 01 32 16.01.

Excavation and Slurry Disposal Plan; G, Design

Submit plan for settlement pond and disposal area. This plan shall include any proposed chemical additives and their Material Safety Data Sheets.

Emergency Backfill Plan; G, Design

SECTION 31 56 00.1 Page 8 of 29

After coordination with the Corps on emergency response, submit an emergency plan for dam safety in the event of excessive slurry loss or instability of the cutoff wall excavations.

Cutoff Wall Construction Plan; G, Design

The methods for assuring and recording accurate wall dimensions, verticality and continuity, location of each panel or secant pile, required overlap, and integrity of the final concrete backfill throughout the cutoff wall shall be identified. The plan shall include plan drawings of adjacent secant piles or panels showing proposed locations of elements and overlap details based on alignment measurements to assure the specified overlap. The Contractor shall also submit the proposed slurry QA/QC plan, which includes QA/QC data sheets, as well as QA/QC plan for the final concrete backfill used in the concrete cutoff wall.

Slurry Design Plan; G, Design

The location, detailed site plans, and cross sections for the development of slurry pond(s). The plan shall address mixing, hydrating, holding, and de-sanding slurry.

Slurry Control Plan; G, Design

All relevant details and safety measures involving the slurry shall be included. The Contractor shall submit a detailed plan for the control and containment of slurry runoff.

Qualifications; G

As detailed in SECTION 115, the Contractor shall submit evidence that he or his subcontractor(s) is (are) competent in cutoff wall construction, similar in scope to this project. The credentials of the cutoff wall specialist shall be submitted 8 weeks prior to the start of the slurry trench construction.

Excavation Soundings; G, Design

The Contractor shall submit excavation soundings as specified in

SECTION 03 37 29 CONCRETE FOR CONCRETE CUTOFF WALLS.

Test Section Plans; G, Design

The Contractor shall submit a plan detailing all equipment, techniques and scheduled activities for each Test Section.

SD-06 Test Reports

Cutoff Wall Test Section Report; G, Design

The contractor shall submit within 2 weeks of the completion of each Test Section a written report on the construction, testing and evaluation of the required Test Section installation. The report shall include adequate plans and details of the cutoff wall excavation

SECTION 31 56 00.1 Page 9 of 29 methods, description of construction activities, all test results, soundings, verticality results, estimated versus actual production rates, recommended methods to increase production rates or achieve cutoff performance criteria and copies of all core logs of verification borings. The report shall also be submitted in digital format compatible with Microsoft Office and Microstation XM (or current USACE version at time of report) design files.

Slurry Test Results; G, Construction

The Contractor shall submit results of daily Contractor Quality Control slurry tests.

Periodic Reports; G, Construction

Per subparagraph 3.14.2.1.

Excavation and Placement Logs; G, Construction

Per subparagraph 3.14.2.2.

Concrete Records; G, Construction

Detailed concrete records and as specified in Paragraph 3.5.3 Record of Concrete Coring and Test Results.

SD-07 Certificates

Bentonite, Construction

The Contractor shall submit a certificate for each lot of bentonite.

Bentonite shall consist of pulverized, natural, sodium montmorillonite clay and comply with API Specification 13A, “Oil-Well Drilling Fluid Materials”.

Sounding Device; G, Construction

Description of sounding device and its use and accuracy for making required measurements during and after excavation and before concreting.

SD-10 Operation and Maintenance Data

Material Safety Data Sheet

The Contractor shall submit a material safety data sheet for each slurry, grout and concrete component.

SD-11 Closeout Submittals

Element/Panel Records

Detailed records in an approved form, for each secant pile or panel showing width of the panel or secant pile diameter, alignment

SECTION 31 56 00.1 Page 10 of 29 measurements, top and bottom elevations, complete description of strata encountered in the excavations, continuity/shape of panel or group of elements, actual and theoretical excavation volumes, casing description (if casing is used), water conditions inside and outside of the casing, concrete strength, concrete volume placed, depths and lengths for earth and rock excavations, joint details, types of excavating equipment used, dates of excavation and concrete placement, and other pertinent information. In addition, corrective measures shall be similarly recorded. A complete tabulation of all records pertaining to approved panels or secant piles shall be delivered to the Contracting Officer.

The Contractor shall submit plan drawings of adjacent as-built panels and secant piles after completion of the cutoff wall.

AMEND#0008

Final Report, G, Design

Construction Report as detailed in subparagraph 3.12.2.4.3.14.2.3

AMEND#00081.7 QUALIFICATIONS

Contractor qualifications are included in Section 00115115.

1.8 GENERAL CUTOFF WALL REQUIREMENTS

The work covered in this section consists of furnishing all plant, labor, materials, equipment, and performing all operations in connection with preparing the site, constructing the cutoff wall, and restoring the site.

1.8.1 Cutoff Wall Dimensions

The Contractor shall construct a continuous, homogeneous, concrete cutoff wall between dam stations 13+70 to 54+50, in the location depicted on the plans, to…