Project_Specifications.pdf

RFP AG-9A40-S-15-0008

HUME LAKE DAM REHABILITATION

REQUEST FOR PROPOSAL

Revision 3 March 3, 2015

GENERAL SPECIFICATIONS

Contents

Contents

SECTION 2

SUPPLEMENTAL REQUIREMENTS

2.1 PROJECT SUMMARY

2.1.1 Background Description

2.1.2 Required Elements

2.1.3 Required Contractor Elements

2.1.4 Workplan

2.2 JOBSITE

2.3 WORK COMPLETION SCHEDULE

2.4 CORRESPONDENCE

2.5 USFS FOREST SERVICE REPRESENTATIVE/ENGINEER

2.6 SCHEDULE

2.7 STATE CONTRACTOR’S LICENSE………………………………………………...10

2.8 AS-BUILT (RECORD) DRAWINGS

2.9 DOCUMENTATION SUBMITTALS

2.10 SCOPE OF PAYMENT

SUBSECTION 2A

JOBSITE REQUIREMENTS

2A.1 CONTRACTOR'S FACILITIES

2A.2 IDENTIFICATION OF CONTRACTOR

2A.3 VEHICLE TRAFFIC

2A.4 FACILITIES

2A.5 UTILITIES

2A.6 DUST CONTROL

2A.7 CLEAN UP

2A.8 WASTE DISPOSAL

2A.9 FIRE PROTECTION

2A.10 PROTECTION REQUIREMENTS

2A.11 PROTECTION OF MATERIAL

2A.12 HAZARDOUS MATERIALS

2A.13 ASBESTOS

SUBSECTION 2B

CONTRACTOR'S PERSONNEL REQUIREMENTS

2B.1 CONTRACTOR'S REPRESENTATIVE

2B.2 PROJECT SUPERVISION

2B.3 PROGRESS MEETINGS

2B.4 SAFE WORK PRACTICES

2B.5 ACCIDENT REPORTING

2B.6 QUALIFICATIONS OF EMPLOYEES

SUBSECTION 2C

DOCUMENTATION

2C.1 DOCUMENTATION REQUIREMENTS

2C.2 DOCUMENTATION QUALITY REQUIREMENTS

SECTION 3

BASE BID TECHNICAL REQUIREMENTS

3.1 SCOPE OF WORK

3.2 MAJOR ITEMS OF WORK BY CONTRACTOR

3.3 MATERIAL FURNISHED BY CONTRACTOR

3.4 FOREST SERVICE-PROVIDED COMPONENTS AND SERVICES

3.5. GEOCOMPOSITE SYSTEM DESCRIPTION

3.6 CONTRACTOR REQUIREMENTS AND RESPONSIBILITIES

3.7 CONSTRUCTION SUBMITTALS

A. Installation Plan and Schedule B. Shop Drawings

3.8 QUALITY CONTROL SUBMITTALS

A. Certification Geocomposites Meet All Specified Requirements B. Manufacturer Quality Assurance Reporting C. The Quality Construction Plan (QCP) for installation D. Independent Testing E. Geocomposite Installation Reporting

3.9 CONTRACTOR QUALITY ASSURANCE

3.10 MANUFACTURER REQUIREMENTS

3.11 GEOCOMPOSITE GEOMEMBRANE MANUFACTURING

3.12 GEOCOMPOSITE AND GEOMEMBRANE CONFORMANCE TESTING

3.13 SYSTEM COMPONENTS

3.13.1 Geocomposite Geomembrane Liner:

3.13.2 Geomembrane Welding Strips and Flashing

3.13.3 Anchorage Seals, Hardware, and Anchors

3.13.4 Perimeter Seals/Joint Seal

3.13.5 Perimeter Seal Alignment

3.13.6 Geocomposite Membrane Installation

3.13.7 Geomembrane Welding

3.13.8 Measurement

3.14 WORK REQUIREMENTS

A. Office and Laydown Areas B. Road Maintenance C. Public Roads D. Protection of Property

3.15 INSPECTION/QUALITY CONTROL/QUALITY ASSURANCE

A. Inspection B. Quality Control and Quality Assurance C. Warranty D. Inspection Points E. Quality Control Tests F. Documentation

3.16 SUBMITTALS

A. Submittals to be furnished at the Time of Proposal and Bid Submission (Table 3- 1)

B. Submittals Furnished after Award of Contract (Table 3-1A)

3.17 FINAL INSPECTION, PAYMENT AND WARRANTY

3.18 ACCEPTANCE

APPENDIX 3A

SECTION 4

OPTIONAL ITEMS

4A FOUNDATION GROUTING

4A.1 DESCRIPTION

4A.2 DEFINITIONS AND GENERAL DETAILS

4A.3 CODES AND STANDARDS

4A.4 MATERIALS DELIVERY, STORAGE, AND HANDLING

4A.5 EXECUTION

4A.6 PAYMENT

4B OUTLET WORKS REHABILITATION

4B.1 DESCRIPTION

4B.2 MATERIALS

4B.3 PAYMENT

4C EROSION PROTECTION OF DAM TOE

4C.1 DESCRIPTION

4C.3 PAYMENT

4D SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM

4D.1 DESCRIPTION

4D.2 CONSTRUCTION

4E GENERATOR BUILDING

4E.1 DESCRIPTION

4E.2 PAYMENT

SECTION 2

SUPPLEMENTAL REQUIREMENTS

2.1 PROJECT SUMMARY

2.1.1 Description

Constructed in 1908 Hume Lake Dam is the first multiarch reinforced concrete dam ever constructed in the world. Seepage impacts have been ongoing since its construction. The project objective is to decrease porosity of the dam structure which, in turn, will significantly decrease seepage reducing its impacts.

2.1.2 Required Elements

A geocomposite membrane liner, geomembrane with geotextile backing, will be installed on the upstream face to lower the overall porosity of the dam reducing seepage through the dam structure. A primary drain, geocomposite geonet with geotextile backing or equivalent, will be installed downstream of the liner for secondary seepage protection to capture and remove water that may find a path around the geomembrane liner. UNLESS SPECIFICALLY STATED THE

GEOCOMPOSITE GEOMEMBRANE AND GEOCOMPOSITE DRAIN WILL

HEREUNTO BE REFERRED TO AS THE GEOCOMPOSITES.

The geocomposites will cover the entire upstream face of Hume Lake Dam. At a minimum, the geocomposites shall extend to bedrock and the dam extents.

Depending on field conditions encountered the geomembrane - excluding the backing - may extend beyond the limits of the dam as a flashing to increase the seepage path or to interrupt seepage paths formed along the dam/soil interface caused by displacement of the dam during filling and emptying of the reservoir.

A collection drain shall be installed along the dam toe to route water captured by the geocomposite geonet to a collection point. Water will be transported to the downstream side of the dam through conduits extending from the collection point through the dam structure.

2.1.3 Required Contractor Elements

The Contractor will develop a proposal and bid for the geocomposite system which will include required seals, anchors, hardware, drainage components, and incidentals needed for the installation of the geocomposites. The minimum required design life for the geocomposite system is 50 years.

Concurrent with the geomembrane installation, the Contractor will perform repairs on the deteriorated concrete dam face as required. Concrete repair work will occur on the upstream face and in locations where surface modifications are required to attach hardware associated with the geocomposites or membrane sealing system.

2.1.4 Workplan

The Work Plan covers the general details required to install the geocomposite system on the upstream face of Hume Lake Dam. Specific items, scope, and construction sequence will likely vary depending on the specific system installed.

The Contractor will submit its proposed Work Plan to the Contracting Officer (CO) with their proposal. Once the Contract is awarded modifications to the proposed Work Plan must be submitted a minimum one (1) month prior to the commencement of work for review by the Contracting Officer (CO). Approval is at the discretion of the Contracting Officer. Possible Work Plan elements and sequencing include,

1. Transportation of material, equipment, and labor to the Jobsite at Hume

Lake Dam. The Jobsite includes the area defined by the project limits in the Drawings

2. Construct protective devices to prevent water and stream contamination and damage to vegetation.

3. Field verify all dimensions and structure condition prior to beginning Work.

- Field verification will include the identification of injection grout locations in the dam structure and foundation. Foundation grouting is optional. If exercised, a grouting plan will be developed and included in the proposed work plan. The grouting plan will include specifics of the grouting procedure and safeguards to prevent damage to the dam structure or foundation.

- Field verification could include coring of dam by A/E firm contracted by the Forest Service to evaluate the integrity of the concrete at specified locations. A safety evaluation, conducted on a separate contract by A/E Contractor, will be performed in conjunction with construction activities.

The consultant carrying out the safety evaluation will coordinate with the Contractor if coring is required to augment the safety evaluation.

4. Dewater the work area and divert or bypass ongoing and storm water flows around the Hume Lake Dam project work area during construction.

Coffer dam construction is at the discretion of the Contractor. However, given the relative position of the outlet works, geomembrane lined primary and secondary coffer dams are suggested to increase safety of workers.

Diversion of water from the coffer dam to the downstream side of Hume Lake Dam can be accomplished via pumping or other safe means.

Possible routes for the water include the primary 36 inch diameter outlet works in Bay 6 and the 12 inch diameter outlet in Bay 5 on Hume Lake Dam.

5. Remove sediment from upstream face to accomplish the grouting program (if option is exercised), installation of the lower perimeter seal, and flashing. Excavate and shore around intake structure as required to ensure the safety and access of workers for the required Work.

6. Evaluate integrity of intake structure. Evaluation will include inspection of the internal conduit, valve seals, and general intake structure. Evaluation of the structural integrity of the intake will be accomplished using radiography or other methods which can determine the steel thickness, weld integrity, corrosion depths…etc. A summary condition assessment will be provided to the COR within one week after the inspection, and will identify structural deficiencies/functional competency of the outlet works pipe.

7. If option is exercised conduct grouting program along upstream dam toe.

8. If option is exercised repair intake structure.

9. Install corrosion resistant hardware to anchor and hold geomembrane to the upstream face of dam.

10. Prepare surface for geomembrane overlay and remove any chipped concrete from jobsite.

11. Install watertight corrosion resistant perimeter seal along abutments, crest, and bottom of dam.

12. Install geocomposite geonet drainage layer over upstream face of dam along with geonet drainage collection system along toe.

13. Install geocomposite geomembrane over upstream face of dam and attach to stainless steel seals/hangers.

14. Drill conduit through dam for geonet drainage discharge and install geonet drainage collection system.

15. Install upstream geomembrane seepage cutoff/flashing and seal.

16. Install/construct additional OPTIONAL ITEMs as directed by the Contracting Officer.

17. Demobilize – Transport all equipment, unused material, and trash to an appropriate location off site.

OPTIONAL ITEMS

1. Grouting of foundation bedrock on upstream side of Bays 4 and 5. Grouting may also be performed in Bays 1, 2, and 3 subject to funding availability and field conditions.

2. Rehabilitation of the outlet works, including repair/replace deteriorated intake structure and repair of the outfall conduit.

3. Installation of erosion protection in Bay 4.

4. SCADA system design and installation, including completion of remote sensing system, webcam, and valve controls.

5. Remove and replace generator building and fencing.

The Work Plan shall include a description of the construction team and equipment to be utilized, quantity of materials to accomplish the Work, and a milestone schedule summarizing the main activities to be accomplished during the period of work.

2.2 JOBSITE

Hume Lake Dam is on Ten Mile Creek, on the western slope of the Sierra Nevada in Fresno County, California. The dam is a multiple-arch dam with 12 arches. The dam is

50.4 feet tall (crest elevation 5299 feet above sea level) and 675 feet long. The original dam construction was completed in 1908.

There are access roads to the north and south ends of the dam. Hume Lake Christian Camp operates on the lakeshore. The site is accessible year round.

The Jobsite is located in a United States Forest Service (USFS) National Forest and is contained within the Project Limits delineated in the Drawings. Modifications to the Project Limits are subject to the approval of the Contracting Officer.

2.3 WORK COMPLETION SCHEDULE

The Work shall commence on or about September 30, 2015 (start date dependent on reservoir conditions). USFS anticipates a 12 week construction period. Snow at the elevation of Hume Lake Dam can be expected in November and rain, including thunderstorms and wind, can be expected at any time and without warning.

2.4 CORRESPONDENCE

All correspondence, of a contractual and commercial nature, shall be addressed to the CO or, as delegated by the CO, the Contracting Officers Representative (COR).

2.5 USFS FOREST SERVICE REPRESENTATIVE/ENGINEER

All correspondence of a technical and Work administrative nature shall be directed to the designated COR.

2.6 SCHEDULE

Within twenty (30) calendar days after notification of Contract award the Contractor shall submit two (2) copies of its proposed Work Schedule for approval as follows.

2.6.1 Work Schedule

A. The Schedule shall show the timing of the Work Plan items in which Contractor proposes to proceed with the Work and shall include dates on which the different stages of Work are to begin and the estimated dates of completion of each stage of Work. The Work schedule shall be clearly legible on a full size 11-inch x 17-inch chart, or larger.

B. The schedule shall be consistent in all respects with the time requirements described in the Contract and shall be adequate to meet all other requirements of this Specification. The schedule shall indicate the dates of Material acquisition and delivery to the Jobsite. It shall also show estimates of weekly Work progress based upon those dates, i.e., the percentage of each major item scheduled to be completed at any given time, together with commencement and completion dates for all items of Work.

2.6.2 Progress Charts

Contractor shall enter on a copy of the chart the actual progress of Work at the end of each week, or at such intervals as directed by the CO, and submit the copy to

2.7 STATE CONTRACTOR'S LICENSE

Bidder shall furnish one copy, clearly marked "Copy for Information Only" of the California State Contractor's License under which the Work will be performed.

the COR as directed.

2.8 AS-BUILT (RECORD) DRAWINGS

Two (2) complete sets of "As-Built" drawings, fully marked-up with approved changes from the proposed drawings, shall be submitted to the CO within two (2) weeks after Acceptance of the Work. Light green pencil shall be used to indicate deletions; red to show additions and changes. Electronic copies of the marked up "As-Built" drawings shall also be produced and submitted to the CO.

2.9 DOCUMENTATION SUBMITTALS

Approval of drawings by the CO shall not relieve Contractor of responsibility in complying with all the requirements of this Specification or Contract.

2.10 SCOPE OF PAYMENT

Payment for contract work is provided, either directly or indirectly, under the pay items listed in the bid schedule.

2.10.1 Direct payment

Payment is provided directly under a pay item listed in the bid schedule when one of the following applies:

A. The work is measured in the Measurement Subsection of the Section ordering the work and the bid schedule contains a pay item for the work from the Section ordering the work.

B. The Measurement Subsection of the Section ordering the work, references another Section for measuring the work and the bid schedule contains a pay item for the work from the referenced Section.

2.10.2 Indirect payment

Work for which direct payment is not provided is a subsidiary obligation of the Contractor. Payment for such work is indirectly included under other pay items listed in the bid schedule. This includes instances when the Section ordering the work references another Section for performing the work and the work is not referenced in the Measurement Subsection of the Section ordering the work.

Compensation provided by the pay items included in the bid schedule is full payment for performing contract work in a complete and acceptable manner. Risk, loss, damage, or expense arising out of the nature or prosecution of the work is included in the compensation provided by the pay items.

Work measured and paid for under one pay item will not be paid for under other pay items.

The quantities listed in the bid schedule are approximate unless designated as a contract quantity. Limit pay quantities to the quantities staked, ordered, or otherwise authorized before performing the work. Payment will be made for the actual quantities of work performed and accepted or material furnished according to the contract. No payment will be made for work performed in excess of that staked, ordered, or otherwise authorized.

SUBSECTION 2A

JOBSITE REQUIREMENTS

2A.1 CONTRACTOR'S FACILITIES

Contractor facilities shall be clearly marked with Contractor's business title or logo, be adequate for the intended purpose and conform with the requirements of all State and local regulations.

2A.2 IDENTIFICATION OF CONTRACTOR

2A.2.1 Identification of Equipment

All equipment and vehicles used by Contractor or Subcontractors on the Jobsite/Station shall be clearly marked with Contractor's or Subcontractor's business title or logo.

2A.2.2 Identification of Contractor's Employees

Contractor and its Subcontractors shall provide each of their employees with a hard hat bearing the business name or logo of Contractor or Subcontractor. Hard hats shall be worn at all times while on the Jobsite/Station.

2A.3 VEHICLE TRAFFIC

2A.3.1 Where vehicles are allowed, the maximum speed limit on the Jobsite is 15 mph except for forklift trucks and cranes, which are limited to 6 mph.

2A.3.2 All personal vehicles will park only in parking areas designated and approved by the COR. All Work shall be confined to the area designated as Project Limits identified in the Drawings. Designated staging and lay down areas shall be within the project limits. Proposed modifications to the project limits are subject to approval by the Contracting Officer.

2A.3.3 These directions shall be strictly adhered to and no deviations shall be allowed without permission of the Contracting Officer.

2A.4 FACILITIES

2A.4.1 Sanitation

Contractor shall supply portable toilets for their employees and for the use of Forest Service personnel. Their use shall be strictly enforced. Contractor shall also provide trash bins and arrange for the proper disposal of the contents and for the removal of the bins.

2A.4.2 Lunchroom and Showers

The Contractor shall not erect any structures at the jobsite, including any temporary structures for dining or bathing.

2A.5 UTILITIES

2A.5.1 Industrial Water

Contractor shall utilize water from Hume Lake for use at the Jobsite. Contractor shall furnish and connect all temporary water sources and lines. There are no potable water sources at the Jobsite. There shall be no release of contaminated water or concrete waste left on the Jobsite. All service water hose couplings must be affixed with a safety device to prevent uncoupling during use. Pumps used to remove water from Hume Lake shall be fitted with appropriate devices to prevent turbidity and protect fish stock, including fingerlings.

2A.5.2 Electrical Power

No electric service is available on the Jobsite. The Contractor shall supply portable electric power generator(s) to meet all the construction electrical needs. Contractor shall furnish, install and be responsible for all required transformers, switches, and electrical lines to meet its portable electric power needs.

2A.5.3 Compressed Air

Contractor shall provide portable compressed air sources. Contractor shall furnish and connect all temporary air lines from the equipment to the Work area(s). All compressed air hose couplings must be affixed with a safety device to prevent uncoupling during use.

2A.5.4 Communications

No land lines are available at the site. Cell phone coverage may be available.

Contractor needs to verify.

2A.6 DUST CONTROL

Contractor shall make every reasonable effort to keep the amount of dust raised during the course of the Work on the Jobsite and on haul and access paths to a minimum. The measures employed shall not create a hazard or cause a nuisance to the nearby Work, or the operations of other subcontractors. No additional money shall be paid to Contractor for dust control.

2A.7 CLEAN UP

2A.7.1 During the progress of the Work, Contractor shall keep the area occupied by it, and access to such areas, in a neat, clean, and safe condition.

2A.7.2 Concrete debris generated during surface preparation shall be collected and removed from the Jobsite in an appropriate manner.

2A.7.3 Upon completion of any portion of the Work, Contractor shall promptly remove all rubbish and equipment, temporary structures, and surplus construction material not intended for future use at or near the same location during the later stages of the Work.

2A.7.4 Upon completion of the Work, the Contractor shall, at its own expense, satisfactorily dispose of or remove from the vicinity of the Work all rubbish, unused material belonging to it or used in the performance of the Work, and shall leave the premises in a neat, clean, and safe condition.

2A.8 WASTE DISPOSAL

Though not anticipated, any hazardous waste created during the execution of the Work shall be placed in adequate containers and properly marked by the Contractor. At the completion of the job, or as required by hazardous waste storage period requirements (whichever comes first), the Contractor shall remove all solid and liquid hazardous waste from the Jobsite. Hazardous waste shall be disposed of offsite at an approved dumpsite and a manifest, signed by the Contractor, shall accompany the shipment. A direct shipping report shall be submitted to the COR. A document describing waste characterization (laboratory testing, etc.) shall be submitted to the COR prior to shipment.

2A.8.1 Concrete Coring and Coring Waste Disposal

All concrete corings shall be collected on site and properly stored. Only water may be used as a coring fluid and shall be captured at the coring site and allowed to settle into the ground a sufficient distance (minimum 10 feet) from any lake water.

All corings shall be properly labeled and delivered to the COR.

2A.9 FIRE PROTECTION

2A.9.1 Contractor shall notify COR in the event of a fire. The Forest Service will make all calls for outside firefighting assistance.

2A.9.2 The Contractor shall provide adequate fire extinguishers at the Jobsite for any activity involving the use of open flames, welding, cutting, or burning that creates the risk of fire.

2A.9.3 The Contractor shall submit a Fire Plan to the COR for approval.

Contractor will be provided a copy of a generic fire plan for use in this area of the National Forest. Contractor shall use this plan as a guide in developing his own plan.

2A.10 PROTECTION REQUIREMENTS

2A.10.1 Contractor shall provide temporary walks, rails, guards, construction fences, and similar safeguards, as required by any ordinances, or as necessary to protect Contractor's employees, the public, and Forest Service employees from the time that Work is initiated until Acceptance. It will be the Contractor’s responsibility to prevent non-authorized access to work areas around the dam.

2A.10.2 During the course of the Work, if Contractor damages any existing public or private property, the Contractor shall be liable for all expenses for repair and for value of lost commodity. Contractor shall provide for or perform immediate repair of such damaged facilities to the satisfaction of the authority having jurisdiction.

2A.11 PROTECTION OF MATERIAL

2A.11.1 Contractor shall receive all material, perform receiving inspection, and prepare over, short, and damaged material reports. Copies of reports/inspections shall be submitted to the COR, 2A.11.2 The Contractor shall be responsible for the care, custody, and protection of its equipment and material and all Forest Service furnished components on the Jobsite until Acceptance.

2A.11.3 The Contractor shall provide all temporary storage rooms and shops that it may require at the Jobsite for the safe and proper storage of its materials, tools, etc.

2A.11.4 The Contractor shall replace, at no expense to the Forest Service, any damaged or stolen Material or components or Material deemed unsatisfactory for use in the Work as determined by the COR.

2A.12 HAZARDOUS MATERIALS

2A.12.1 Contractor shall provide the COR with a Material Safety Data Sheet (MSDS) for all chemicals/materials brought onto the Jobsite. Contractor shall maintain onsite an MSDS for all materials brought to the Jobsite.

2A.12.2 All containers (empty or full) brought onto the Jobsite by Contractor shall be marked with Contractor's business name or logo.

2A.12.3 All containers brought onto the Jobsite shall be removed by Contractor (empty or full) at the end of the Job.

2A.13 ASBESTOS

2A.13.1 Asbestos-containing materials shall only be removed, handled and/or disposed of by properly licensed contractors. The Forest Service is not aware of any asbestos at the Jobsite.

SUBSECTION 2B

CONTRACTOR'S PERSONNEL REQUIREMENTS

2B.1 CONTRACTOR'S REPRESENTATIVE

Throughout the construction period, Contractor shall have a representative who is empowered to speak and act for and on behalf of Contractor at the Jobsite.

2B.2 PROJECT SUPERVISION

The Contractor shall provide and maintain competent supervision of all required operations. Supervisors shall be experienced in all faucets of the Work required by this Specification and shall be employees of Contractor. If, in the opinion of the CO, the safety, quality, or progress of the Work is being impaired by a shortage of Contractor's supervisory personnel, the Contractor shall assign additional qualified personnel to supervise the Work.

2B.3 PROGRESS MEETINGS

Unless waived by the CO, the Contractor shall attend weekly progress meetings at the Jobsite. The participants shall include Contractor's principal representatives, Subcontractor's representatives, as appropriate, and the COR. The purpose shall be to review progress and schedule Work and deliveries of material. The results desired from the progress meetings shall be to inform all concerned on the matters discussed and to obtain coordinated action that will best assure performance pursuant to the basic schedule.

2B.4 SAFE WORK PRACTICES

Contractor shall at all times follow safe Work practices in the performance of the Work.

Failure to follow safe Work practices could result in the stopping of specific Work activities deemed to be unsafe and could result in the removal of unsafe employees from the Jobsite and/or the termination of all Work by Contractor at the Jobsite.

2B.5 ACCIDENT REPORTING

A. Immediately report any accident to the COR, providing the following information:

1. Location of injured person by describing the unit number, equipment, elevation, etc.

2. Type and extent of injury.

3. Contractor that employs injured person.

B. Contractor shall arrange for employee's medical treatment. If an ambulance is called, advise the COR of where they are to be sent.

C. As soon as practical, after having provided medical attention for injured employee, the Contractor shall provide a written accident report to the COR, including the following:

1. Name and age of injured employee.

2. Classification of injured employee.

3. Nature of injury.

4. Time and location of accident.

5. How the accident occurred.

6. Treatment rendered and where taken, if applicable.

2B.6 QUALIFICATIONS OF EMPLOYEES

The Contractor shall employ only competent and skilled employees to perform the Work. The Contractor will supply the names of all employees and subcontractors at least 30 days prior to their arrival at the Jobsite.

If the COR notifies Contractor that any employee on the Jobsite is incompetent, disorderly, is using threatening or abusive language to any person on the Jobsite, or is otherwise unsatisfactory, the following steps shall be taken:

A. Contractor shall review the circumstances that prompted the COR to notify Contractor of the problem.

B. Upon completion of A, the COR and Contractor shall meet and determine whether (i) any further action is necessary, (ii) the employee is to be counseled regarding the problem or (iii) the employee is to be discharged.

C. The employee shall not be employed by Contractor on the Jobsite again if discharged, except with the written consent of the CO.

SUBSECTION 2C

DOCUMENTATION

2C.1 DOCUMENTATION REQUIREMENTS

The Contractor shall provide all documentation as specified throughout this Specification and compiled in Table 3-1 and Table 3-1A, Documentation Submittal Schedule, in the form and quantity specified.

A. All documentation submitted shall be accompanied by a transmittal letter indicating the following:

1. Project Name(s)

2. Contract number

3. This Specification Number

4. The Item Number as referenced in Table 3-1 and Table 3-1A

Documentation Submittal Schedules

5. The Document Identification Number, Title, Revision and Date

6. Contractor's Description and Quantities of Items Sent

7. Contractor's Correspondence Identification

8. Updated Drawing List

B. Submittals shall be sent to the COR.

C. Drawings shall be submitted in sets and each set shall be accompanied by a drawing list, which shall list each drawing in the set with its number, title, revision identification and release date.

D. A Master Drawing List shall identify, in numerical order, all the drawings used in the design and manufacture of the Work defined by this Specification. All drawings shall be listed by drawing number, title, revision identification and date, and status.

E. Unless otherwise specified in writing by CO, all documents submitted to CO for approval shall be returned to Contractor not later than 30 days after receipt by CO.

The CO shall indicate approval status and action required.

F. Approved documents shall not be changed without prior written approval from the CO. Approved changes shall be incorporated into the applicable documents and transmitted in the final form to the CO.

G. Contractor's drawings shall be reviewed and approved by the COR only as to arrangement and conformance to this Specification. Such approval shall not be construed to relieve or mitigate Contractor's responsibility for accuracy or adequacy of design, materials and/or equipment represented thereon.

H. Catalogs, bulletins and other published documents shall not be microfilmed.

They shall be prepared in the best commercial practice and be suitable for microfilming to the quality requirements specified herein. In general, these documents shall conform to the quality requirements for hard copy specified in Section 2C.2.

2C.2 DOCUMENTATION QUALITY REQUIREMENTS

All documentation submittals shall be in the hard copy form as follows:

A. Legibility and contrast shall be such that every line, number, letter and character shall be clearly legible.

B. Reproductive quality shall be of such clarity as to produce a third generation copy that will meet the legibility requirements of Item A.

C. Shall be of right reading from the image side and shall have dark lines on a light background (positive).

D. May be reproducible (translucent or transparent) or non-reproducible (opaque).

E. To every practical extent documentation shall be typed and arranged in a neat and professional manner. Handwritten documents shall conform to the legibility requirements of Item A, above, and the quality requirements of Item B, above.

F. When applicable, documentation shall contain a table of contents, list of figures, and tables of applicable, referenced or complementary documents.

SECTION 3

BASE BID TECHNICAL REQUIREMENTS

3.1 SCOPE OF WORK

The Scope of Work addresses the installation of a geocomposite geonet drainage layer and geomembrane system on the upstream face of Hume Lake Dam. In addition, concrete repairs will be made to dam face and foundation at the dam/bedrock interface as required.

3.2 MAJOR ITEMS OF WORK BY CONTRACTOR

The project is to be completed in the year 2015. The preliminary major items of Work to be performed by the Contractor include, but are not limited to the following:

3.2.1 Upstream Geocomposite Geomembrane and Drainage Systems and Concrete Repairs

A. Transport material, equipment and labor to the Jobsite at Hume Lake

Dam.

B. Construct protective devices, as required, to prevent water and stream contamination and damage to vegetation.

C. Field verify all dimensions prior to beginning Work.

D. Excavate sediment at upstream face to bedrock for lower perimeter seal.

E. Fill/repair identified deficiencies on dam face.

F. Prepare upstream surface for geocomposite anchoring/attachement corrosion resistant hardware/attachment systems. Any loose material generated during surface preparation shall be collected and removed from the jobsite.

G. Install corrosion resistant applicable hardware/attachment systems to anchor and hold geomembrane to face of dam.

H. Prepare upstream dam surface for gecomposite overlay, including any required chipping, grinding, or filling of surface material. Any loose material generated during surface preparation shall be collected and removed from the jobsite.

I. Install watertight perimeter seals along abutments, crest, and bottom of dam.

J. Install geocomposite drainage layer over upstream face of dam along with drainage collection system along dam upstream toe.

K. Install geocomposite geomembrane over upstream face of dam and attach to anchoring/attachment systems and seals - including welding of adjacent rolls.Drill conduit through dam for drainage discharge and install drainage collection plate on upstream face.

L. Demobilize - Transport all equipment, unused material and trash to an appropriate location off site.

M. Provide all installation documentation and “As-Built” drawings upon completion of the work.

The items of Work and order will vary depending on the installed system.

3.2.2 Outlet Works Condition Assessment

As part of the base bid, the condition assessment will include:

• Non-destructive testing of the outlet works conduit steel pipe wall thickness and depth of corrosion penetration.

• Condition and remaining thickness of concrete lining. The original lining was 3/8 inch thick.

• Evaluation of welds, antivortex plate, valve seals, and any other elements of the outlet works as warranted as the condition assessment is conducted.

Non-destructive testing could include magnetic resonance, sonar, radar or any method that will allow an accurate assessment of the structures integrity of the steel conduit and components. The Forest Service will provide all information and preliminary quotes obtained from vendors in its research into available methods.

The Contractor will provide a summary assessment of the outlet works within one week of the completion of testing. Depending on the testing results the COR may require a full condition assessment report. If required, the full condition assessment report will be submitted by the Contractor not less than one month after the completion of testing.

3.3 MATERIAL FURNISHED BY CONTRACTOR

Contractor shall furnish all Material specified in this Specification and as shown on the CONCEPTUAL DRAWINGS and Sketches, except for those items designated as

“Forest Service-Provided Components and Services” in Section 3.4, or shown on the drawings and documentation.

3.4 FOREST SERVICE-PROVIDED COMPONENTS AND SERVICES

The Forest Service will prepare and provide the following components and services for this Work:

3.4.1 Conceptual Construction Drawings (see list in Appendix 3A).

3.4.2 Conceptual Reservoir draining and water diversion plan

3.4.3 Specifications for the Work.

3.4.4 Interface with local Forest Service Personnel (through the COR).

3.4.5 The COR is responsible for verifying compliance to the Specification and Drawings and is not responsible for management of the Work, safety, or other aspects of the project.

3.5. GEOCOMPOSITE SYSTEM DESCRIPTION

3.5.1 The upstream geocomposite geomembrane, geocomposite drain, and drainage system shall provide a continuous waterproofing barrier on the upstream face of Hume Lake Dam. The anchorage system for the geocomposite system shall consist of corrosion resistant anchoring hardware into the concrete dam face to which the geocomposite system shall be connected via corrosion resistant attachment hardware.

3.5.2 The main components of the geocomposite system shall include:

1. A bi-planar geonet drainage layer with laminated geotextile (geocomposite drainage layer)

2. A minimum 120 mil thick membrane bonded to a geotextile (geocompsite geomembrane).

3. Corrosion resistant geocomposite attachment hardware.

4. Corrosion resistant concrete anchorages.

5. Watertight corrosion resistant hardware and durable intermediate and perimeter seals as required to prevent seepage into the dam face.

Stainless steel utilized in attachment, anchoring, and seal assemblages shall meet or exceed applicable ASTM standards. Materials not listed shall meet or exceed applicable ASTM standard testing requirements for specific properties required for a successful installation and minimum 50 year service life.

3.6 CONTRACTOR REQUIREMENTS AND RESPONSIBILITIES

3.6.1 The Contractors proposal shall include a geocomposite system that provides a watertight seal to the upstream face of the dam based on the requirements of this Specification. The proposal shall address all of the requirements of the installation including, but not limited to, the following:

1. Characteristics of the geocomposite system.

2. Characteristics of the mechanical anchorage.

3. Attachment of the membrane along its perimeter to the concrete face.

4. Intermediate attachments if required.

5. Surface smoothness tolerances on the concrete face.

6. Tolerances on anchorage and attachments.

7. 50 year service life. All components necessary for successful operation of the geocomposite system shall function for 50 years minimum under the expected operational conditions. Service life does not include workmanship (covered under warranty) or routine maintenance. Service life is intended as a minimum design threshold and may be adjusted by the Contracting Officer depending on weighting of design elements in a specific proposal.

3.6.2 The Contractor shall supply all materials, equipment, and labor for installing the complete geocomposite system.

3.6.3 The Contractor shall install the complete geocomposite system.

3.6.4 The Contractor shall be responsible for inspecting and accepting the upstream concrete surface. The Contractor is also responsible for quality control testing for all of the materials he supplies.

3.7.5 The Contractor shall be responsible for ensuring that the system does not infringe on any patent or that certification of legal use of the patent right is obtained and all patent fees are paid.

3.6.6 The Contractor shall be an established company that has specialized in the specified membrane design, supply, and installation for not less than five (5) years.

3.6.7 The Contractor shall provide evidence of the following minimum experience with design, supply, and installation of a similar exposed membrane system on at least three dams of a similar type and in a similar environment including:

1. At least 60 feet high.

2. At least 40,000 ft2 (3700 m2) upstream face covered.

3. Covered with the same geocomposite system for at least 10 years.

4. Have a multi-arch design.

5. Total surface of the three or more dams not less than 150,000 ft2 (14000 m2).

Details included shall be:

1. Name of project.

2. Country / location of project.

3. Name and contact details of owner.

4. Year installed.

5. Type of dam.

6. Number of arches

7. Altitude.

8. Specific details of geocomposites

9. Height of dam

10. Slope of upstream face

11. Area of membrane

3.7 CONSTRUCTION SUBMITTALS

The following submissions shall be made at least 20 days before the commencement of Work and may be included in the Work Plan (section 2.1.4):

A. Installation Plan and Schedule

Submit a detailed schedule and plan showing the sequence and approach for installing the geocomposite system. The plan should include the method of scaffolding and delivering and handling materials at the upstream face of the dam.

Timing of the geocomposite fabrication and delivery shall also be included.

B. Shop Drawings

Submit drawings showing the method of attachment of the geocomposite system and installation of the anchorages on the upstream face of the dam. Tolerances shall be specified.

3.8 QUALITY CONTROL SUBMITTALS

The following submittals shall be made:

A. Certification Geocomposites Meet All Specified Requirements

Certification that the geocomposites and all other materials to be supplied will be tested and will meet all of the requirements specified.

B. Manufacturer Quality Assurance Reporting

Contractor will provide certificates, reports, test data and other manufacturing information and test results of the Manufacturer's Quality Assurance tests performed in accordance with the Manufacturer's Quality Assurance and Quality Control Plan.

C. The Quality Construction Plan (QCP) for installation

The QCP shall cover installation techniques, acceptance, handling and storage of materials before installation, welding and control of welding, and perimeter seal installation specifications (torqueing, torqueing sequence, membrane installation specs…etc.).

D. Independent Testing

The name of the independent testing laboratory that will be used to perform the conformance testing specified. The testing laboratory shall be completely independent of the Contractor's and/or Subcontractor's operations.

E. Geocomposite Installation Reporting

Following installation of the geocomposite system, a detailed installation report shall be provided. The report shall include a record of all changes to the initial design and/or Specifications and be included with the as-built Drawings.

3.9 CONTRACTOR QUALITY ASSURANCE

The Contractor shall designate a highly qualified senior technical person as the responsible liaison for fabrication, shipping, installation, training, overall quality control and co-ordination. The person, who shall be defined as the Contractor's Representative, shall be at the site for geocomposite inspection, geomembrane welding and testing throughout the installation of the geocomposite geomembrane system. The Contractor's Representative shall have a minimum of five years experience welding similar geomembrane material on-site. The Contractor's Representative shall have a minimum of 25,000 square metres of geomembrane installation experience and be thoroughly familiar with the installation of the perimeter seals.

The Contractor’s Representative shall verify that the upstream concrete surface of the dam is acceptable before installation.

Where the Contractors Quality Assurance or Quality Control Plans differ from the Specifications contained herein, the more stringent of any given requirement, as determined by the Contracting Officer, shall take precedence.

3.10 MANUFACTURER REQUIREMENTS

The Manufacturer of the geocomposite membrane shall hold an ISO 9001 certification.

The Manufacturer shall have a minimum ten years manufacturing experience with the product supplied and must be approved in writing in advance by the CO. No substitutes will be permitted.

The geocomposite membrane proposed shall have been used in similar applications, in exposed positions, in similar environment, for water retaining structures with heads in excess of 75 ft.

3.11 GEOCOMPOSITE GEOMEMBRANE MANUFACTURING

Prior to shipment of materials, the following shall be provided to the Contracting Officer:

A. A properties sheet including, at a minimum, the specified properties measured using test methods indicated in the Specifications, or equivalent

B. A list of the descriptions of the base polymers that comprise the geocomposite membrane

C. The sampling procedure and results of testing conducted by the Manufacturer to verify the quality of the geocomposite membrane

D. A certification that the geomembrane liner material in the geocomposite and the geomembrane welding strip material produced for this project have the same properties

Prior to shipment, one quality control certificate for every ~250 sq. Meters(~ 2,700 sq.

feet) of geocomposite geomembrane provided shall be submitted. The quality control certificate shall include:

A. Roll or lot numbers, product identification, roll dimension and Manufacturer.

B. Results of quality control tests in accordance with Tables 1 and 2 below.

3.12 GEOCOMPOSITE AND GEOMEMBRANE CONFORMANCE TESTING

The Contractor shall collect random samples of the geocomposite membrane from the materials delivered to the Site or collect samples at the factory under supervision of a third party for conformance testing. Samples shall be taken from the entire width of the roll on the outermost wrap.

Perform a minimum of two conformance tests of the geocomposite membrane delivered materials or one test per 250 square meters, whichever is greater. An approved independent laboratory as specified below shall perform tests:

A. Specific gravity (every ~250 sq. meters )

B. Thickness (every ~250 sq. meters )

C. Puncture resistance (every ~250 sq. meters )

D. Tear resistance (every ~250 sq. meters )

E. Tensile strength (every ~250 sq. meters )

3.13 SYSTEM COMPONENTS

The system components specified will vary depending on the proposed system.

Variations from these generalized components shall be included in the proposal submittal and must equal or exceed specified parameters.

3.13.1 Geocomposite Geomembrane Liner:

The geocomposite geomembrane shall consist of a geomembrane heat coupled during extrusion to a geotextile. The extrusion of the geomembrane shall be in a homogeneous mass from a flat die. The minimum physical properties of the geocomposite geomembrane are specified in Table 1.

Table 1 – Geomembrane with Geotextile Reinforcement Backing (Minimum Average Roll Values)

Property Test Method British Units Metric

Thickness ASTM D 1593 > =120 mil +/-

10% tolerance on average thickness

> =3.0 mm +/- 10% tolerance on average thickness

Geomembrane only

Specific Gravity ASTM D 792 >= 75 lbs/ft3 >= 1.2 g/cm3

Areic Mass ASTM D 5261 >= 13.3 oz/yd2 >= 450 g/m2 Geotextile only

Tensile Strength ASTM D 638 Geotextile Break Tension >= 120 psi >= 21 kN/m2 Geotextile Break Elongation >= 35 % >= 35 % Geomembrane Break Tension

>=120 psi >= 21 kN/m2

Geomembrane Break Elongation

>=240 % >=240 %

Tear resistance ASTM D 1004 >=40 lbs >= 177 N

Puncture resistance ASTM D 4833 >=150 lbs >= 665 N

Hydrostatic resistance ASTM D 751 >=500 psi >= 3.4 MPa (Mullen Burst)

Low Temperature/Brittleness ASTM D 1790 no failure at 0 F no failure at - 18

C

Volatile Loss ASTM D 1203 <= -0.3 % <= -0.3 %

Water Extraction ASTM D 3083 <= - 0.2 % <= -0.2 %

Dimensional Stability ASTM D 1204 +/- 2.5 % +/- 2.5 %

UV Resistance (max. % change in

ASTM D 7238 <= 20% <= 20%

Tensile properties, after 1000 h exposure)

3.13.2 Geomembrane Welding Strips and Flashing

The process used to manufacture the geomembrane welding strips and flashing, if installed, shall be identical to that used in the manufacturing of the geocomposite membrane liner without the geotextile backing. The physical properties of the geomembrane welding strips are specified in Table 2.

Table 2 –Geomembrane with No Backing Reinforcement (Minimum Average Roll Values)

Thickness ASTM D 1593 >= 120 mil +/-

10% tolerance on average thickness

>= 3.0 mm +/- 10% tolerance on average thickness

Specific Gravity ASTM D 792 >= 75 lbs/ft3 >= 1.2 g/cm3

Tensile Strength ASTM D 638 Geomembrane Break Tension

>=150 psi >= 26 kN/m2

Geomembrane Break Elongation

>=280 % >=280 %

Tear resistance ASTM D 1004 >=20 lbs >= 87 N

Puncture resistance ASTM D 4833 >=80 lbs >= 355 N

Hydrostatic resistance ASTM D 751 >=230 psi >= 1.5 MPa (Mullen Burst)

Low Temperature/Brittleness

ASTM D 1790 no failure at 0 F no failure at - 18 C

Volatile Loss ASTM D 1203 <= -0.3 % <= -0.3 %

Water Extraction ASTM D 3083 <= - 0.2 % <= -0.2 %

Dimensional Stability ASTM D 1204 +/- 3 % +/- 3 %

UV Resistance (max. % change in

ASTM D 7238 <= 20% <= 20%

Tensile properties, after 1000 h exposure)

3.13.3 Anchorage Seals, Hardware, and Anchors

All hardware and materials used to attach the geocomposite to the dam face shall be corrosion resistant and provide durability over the minimum service life under the expected operational conditions. The Contractor will be required to demonstrate – through success of previous projects - the reliability and effectiveness of all materials utilized to fix and seal the geocomposite to the dam face.

Concrete anchors for attaching the geotextile, geonet, membrane, perimeter seals, and geocomposite membrane should be installed in the existing shotcrete facing wherever possible – versus the original dam substrate.

The Contractor will include in the proposal submittal all materials used to fix the geomembrane to the dam face including anchor types, hardware application, anchor adhesive, and expected depth of penetration prior to the commencement of construction activities.

3.13.4 Perimeter Seals/Joint Seal

The Contractor shall design the layout and details of the perimeter seals and include them as part of their proposal submittal. The submittal will include specifics related to geocomposite membrane preparation, geomebrane installation, seal torqueing, epoxy utilized to bond the membrane to the concrete dam face, and any salient functional seal details that insure its long term durability.

3.13.5 Perimeter Seal Alignment

The alignment for the perimeter seals shall be surveyed – via GPR or other means

- by the Contractor to avoid cutting existing reinforcing bars when drilling and installing anchors. Hole pattern, depth, and anchoring procedures shall be determined and be included proposal submittal. Installation details and layout of brackets used to retain the seal and liner shall be included in the proposal.

3.13.6 Geocomposite Membrane Installation

The Contractor shall develop a Geomembrane installation plan which will include salient details including watertight geomembrane composite welds, anchor/seal attachment details, intermediate and final construction/installation procedures ..etc., shall be included in the proposal submittal.

3.13.7 Geomembrane Welding

Only personnel trained and qualified by the Contractor with previous experience of welding procedures similar to that required shall be permitted to weld the geomembrane. Welders shall successfully pass qualification testing at the beginning of the job. Welders shall use mechanical heat splicing equipment specifically designed for the purpose. Cold seaming with solvent is not allowed.

All joints and splices shall be sealed by heat welding a welding strip overlapping the liner material on each side.

Trial seams shall be performed and tested prior to the commencement of construction. Tensile testing of trial seams shall be performed with a portable stress apparatus or in an approved lab. Welds shall have the same mechanical properties after welding as specified for the parent membrane in Table 2. Tensile strength is confirmed if failure takes place outside of the seam area.

The Contractor shall inspect all…