16-008_SOW_Rev_2.pdf

FISH PASSAGE BRIDGE S.O.W. - 1

STATEMENT OF WORK

RELOCATE FISH PASSAGE BRIDGE

AT

RED ROCK LAKES NATIONAL WILDLIFE REFUGE

PART 1 - GENERAL REQUIREMENTS

1.1 SUMMARY

A. Work under this contract includes placing an existing prefabricated bridge and sills, delivered from an alternate site, on Culver Road over Elk Spring Creek at Red Rock Lakes Nation Wildlife Refuge (NWR). Work includes repairing damage to concrete sills, preparing the sill foundation, placing shore protection, placing the bridge sections, preparing and replacing metal fabrications and connections damaged or removed during salvage process, re-installing railings, repairing concrete decking, placing required signage, and placing gravel approaches.

B. The Contractor shall evaluate and submit a proposal outlining their proposed strategy and approach to the project. This proposal shall include an explanation of the proposed construction process.

C. All construction shall comply with all applicable Federal, State, and Local codes, regulations, and requirements. In the absence of specific regulation or code, design and construction shall be executed according to commonly acceptable industry standard practice for a road of this type.

1.2 PROJECT BACKGROUND

A. Red Rock Lakes NWR, along with Montana FWP, are working to restore Elk Spring Creek in a continuing effort strengthen populations of Artic grayling and keep them from being listed on the threatened or endangered species lists. As part of this effort, a culvert that was under Culver road was removed and plans are in place to restore Elk Spring Creek for the production and rearing of Artic grayling.

B. To make Culver Road useable again the plan is to place a prefabricated bridge over Elk Spring Creek that does not interfere with fish passage. As part of a Federal Highway Administration (FHWA) project, at another Fish & Wildlife Service station in northwestern Montana, a prefabricated steel bridge with concrete deck is being removed and delivered to Red Rock Lakes NWR for reinstallation. The bridge was delivered to the site in late September, 2016.

C. The Montana Fish Wildlife and Parks (FWP) are scheduling to perform stream restoration work in Elk Spring Creek in the fall of 2016. Restoration work will cover over 1,500 feet of stream bead and banks. Restoration may be occurring while the Work under this contract is ongoing.

D. Culver Road is planned to be a detour route in the Summer of 2017 when the FHWA plans to rehabilitate Elk Lake Road. As part of the coordination effort this bridge needs to be placed and ready for use prior to any work on Elk Lake Road.

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1.3 PROJECT INFORMATION

A. Location: Red Rock Lakes NWR,

1. Headquarters Building: 27650B South Valley Road, Lima, MT.

2. Project Location: north end of Culver Road, location shown Contract Drawings. From headquarters go 10 miles east on South Valley Road to Elk Lake Road and then 2.5 miles north to project location.

B. Contact Information: Prospective bidders are encouraged to visit the work area in order to examine the existing site conditions. Contact the Refuge at (406) 276-3536 to set up a site visit.

C. Provided with Statement of Work

1. Copy of geotechnical report prepared for the bridge site.

2. Copy of the topographical survey performed at the bridge site.

3. Copy of the bridge manufacturers shop drawings of bridge being relocated.

1.4 ACCESS TO SITE

A. Access to project location is limited to access from the north off of Elk Lake Road and from the south by crossing Widgeon Pond Dam. Access across the dam is limited to FWS vehicular traffic and construction equipment when road conditions permit it and at the Refuge’s discretion.

B. All operations of the Contractor (including storage of materials) upon Government premises shall be confined to areas authorized or approved by the Contracting Officer.

C. Limit use of Project site areas within the Contract limits indicated. Do not disturb portions of Project site beyond areas in which the Work is indicated.

1.5 PROJECT CONDITIONS

A. The Contractor shall coordinate the closure of Culver Road with the Refuge. Barricades are to be installed to prevent vehicular access during construction. Detour signs shall be installed to notify private land owners and Service personnel of an alternate route Elk Spring Creek. The alternate route will be a location determined by the refuge.

1. Provide not less than 48 hours' notice to Government of activities that will affect Government's operations.

B. Coordinate all work of the project to facilitate orderly progress and proper sequence of work at all times.

C. In the event that other contracts are in progress concurrently with this contract, the Contractor shall coordinate their work so as not to disrupt progress of other work, and shall cooperate to facilitate orderly progress of all work.

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1.6 PERFORMANCE

A. The project shall be completed and functioning within 60 calendar days from the date the Notice to Proceed (NTP) is issued.

B. On-Site Work Hours: Limit work in the existing building to normal business working hours of 7:00 a.m. to 4:00 p.m., Monday through Friday, unless otherwise indicated.

1. Work on weekends will be restricted to Contracting Officer’s approval and at the Station Manager’s discretion.

2. No work will take place over Federally observed holidays.

1.7 PERMITS AND FEES

A. The Contractor shall be responsible for obtaining all necessary local, State, and Federal permits and licenses, and payment of related fees, per the Contract Clauses.

1.8 APPLICABLE CODES, STANDARDS AND SPECIFICATIONS

A. All work shall comply with the codes and standards applicable to each type of work as listed in individual Sections of this Statement of Work.

B. Where a conflict occurs between a referenced document and the Project Specifications, the Project Specifications govern.

C. Where a conflict occurs between referenced documents, the document containing the most stringent requirements governs.

D. Where referenced documents are not specified by date, the document current at the bid opening applies.

E. Materials, applications, and tests specified by reference to published standards of society, association, code, or other published standards are included in the specifications as if written in their entirety.

F. Conform to all regulations and statutes of the State of Montana and to all Federal Regulations which apply.

1.9 MEANS AND METHODS

A. Means and methods of construction shall be such as the Contractor or subcontractors may choose; subject, however, to the Contracting Officer's right to reject means and methods proposed which:

1. Constitute a hazard to the work, persons, or property.

2. Will not produce finished work in accordance with terms of the contract.

3. Are contrary to specified means or methods included in the contract.

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B. The right to reject means and methods of the Contractor or subcontractor shall not be construed or interpreted as acceptance of control of means and methods by the Contracting Officer.

C. The Contracting Officer's approval of means and methods or failure to exercise right to reject means and methods shall not relieve the Contractor of the obligation to complete the work required by the contract.

D. Total responsibility for control of all means and methods lies with the Contractor for all work.

1.10 SAFETY

A. The Contractor shall provide, erect and maintain all necessary barricades, suitable and sufficient flasher lights, flagmen, danger signals and signs, and shall take all necessary precautions for the protection of the work and the safety of the public. All ponds and water control structures shall remain accessible by vehicle. Roads closed to traffic shall be protected by effective barricades and shall be placed with acceptable warning signs. All barricades and obstructions shall be illuminated at night and all lights shall be kept burning from sunset until sunrise. Install appropriate traffic signs at crossroads and approaches to site as needed to direct affected public traffic. Specific signs and barricade requirements are detailed in the U.S. Department of Transportation, "Manual on Uniform Traffic Control Devices".

B. The Contractor shall assume full responsibility and liability for compliance with all applicable Federal, State, and local regulations pertaining to the protection of workers, visitors to the site, and persons occupying areas adjacent to the site, including the provisions of 29CFR1910 and 29CFR1926 of the Code of Federal Regulations. The Contractor shall hold harmless the Government for failure to comply with any applicable safety or health regulation on the part of himself, his employees, or his subcontractors.

C. Provide personal safety equipment and training commensurate with the hazards which may exist at the work site. The personal safety equipment and training shall be determined by a thorough hazard analysis of all work site areas. The safety program available at all work sites shall include a minimum of:

1. One nonfreezing-type fire extinguisher in each workshop and shed used for storage of materials at the work site. Place in location readily accessible to construction personnel.

2. A first aid kit for use of construction personnel commensurate with size of project with items necessary for first aid treatment of all injuries.

3. The Contractor shall conduct regular onsite safety inspections and all construction personnel shall receive a safety orientation.

4. Post telephone numbers of nearest hospital, ambulance service or flight for life, and fire station in conspicuous location. Advise all workers of location of telephone numbers.

1.11 ENVIRONMENTAL PROTECTION

A. The Contractor shall abate and control all environmental pollution arising from construction activities by complying with all applicable Federal, State, and local laws and regulations concerning environmental pollution control and abatement, as well as the specified requirements in this contract. Compliance with this requirement by subcontractors will be the responsibility of the Contractor.

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B. Fossils and Artifacts

1. Should the Contractor discover any fossils or artifacts during construction operations, such objects shall become the property of the Government. The Contractor shall cease construction operations in the area of the "find," and immediately notify the station manager of such discovery. Construction operations may proceed in other areas not affected by this clause. Care shall be exercised by the Contractor not to damage fossils or artifacts uncovered during excavation operations.

2. Failure to comply with this requirement may be considered a violation of the Archeological Resources Protection Act of 1979 as amended. Destruction of historic and prehistoric sites and/or unauthorized collection of cultural materials can result in criminal and/or civil penalties. Penalties can include fines, prison sentences, and/or confiscation of equipment.

3. If the Contractor uses fill from a nongovernmental source to perform work that is required under this project, and a new borrow site is opened or an existing borrow area is expanded in order to obtain such materials, the Contractor shall assure that any new borrow area disturbance meet the requirements of Section 106 of the National Historic Preservation Act.

C. Abatement of Air Pollution

1. The Contractor shall comply with applicable Federal, State, and local laws and regulations concerning the prevention and control of air pollution.

2. Construction activities shall be performed in such a manner that air pollution will be held to a minimum.

3. Burning of materials, trees and brush, combustible construction materials, and rubbish will not be permitted. Construction debris shall be disposed of at a location designated by the Contracting Officer or hauled off the Station to an approved disposal site.

D. Prevention of Water Pollution

1. The Contractor is responsible for implementing the terms and requirements of the (insert state) storm water discharge permit, as issued to the State under the National Pollution Discharge Elimination System (NPDES) by the Environmental Protection Agency (EPA).

The Contractor shall apply for and execute all permits as required by the State of (insert state) regarding storm water discharge from the construction site. The Contractor shall submit to the Contracting Officer a copy of all permit applications and a copy of all approvals from the State. Allow the Government 10 days for review of the application package prior to submission.

2. During construction the Contractor shall comply with all applicable Federal, State, and local laws and regulations concerning the control and abatement of water pollution.

3. The Contractor's construction activities shall be performed by methods that will prevent entrance or accidental spillage of solid matter, contaminants, debris, and other objectionable pollutants and wastes into streams, flowing or dry water-courses, lakes, ponds, and underground water sources. The Contractor shall dispose of all pollutants such as petroleum products, rubbish, cement, concrete, etc., and objectionable material shall be hauled away in tanks or barrels or buried in an approved landfill.

4. Sanitary facilities, such as chemical toilets shall be located far enough from wells, live streams, or ponds to prevent pollution of the water.

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5. Dewatering work for structure foundations or earthwork operations adjacent to, or encroaching on, streams or watercourses shall be conducted in a manner which prevents muddy water and eroded materials from entering the streams or water courses. This shall be accomplished by construction of intercepting ditches, bypass channels, barriers, settling ponds, or other approved means. Excavated material shall not be placed in, or adjacent to, watercourses where it can be washed away by high water or storm runoff.

E. Environmental Litigation: Time lost due to work stoppage because of failure of the Contractor to comply with these requirements may not be the subject of a claim for extension of time, for additional costs, or damages.

1.12 PAYMENT PROCEDURE

A. Each Application for Payment shall be consistent with previous applications and payments as certified by Contracting Officer and paid for by Government.

B. Payment Application Times: The date for each progress payment is indicated in the Agreement between Government and Contractor.

C. Initial Application for Payment: Administrative actions and submittals that must precede or coincide with submittal of first Application for Payment include the following:

1. Schedule of values.

2. Contractor's construction schedule (preliminary if not final).

D. Final Payment Application: After completing Project closeout requirements, submit final Application for Payment with releases and supporting documentation not previously submitted and accepted, including, but not limited, to the following:

1. Evidence of completion of Project closeout requirements.

2. Written guarantees, warranties, and certificates.

3. Record (As-Built) Drawings

4. All test reports.

1.13 SUBMITTAL ADMINISTRATIVE REQUIREMENTS AND PROCEDURES

A. Coordinate each submittal with fabrication, purchasing, testing, delivery, other submittals, and related activities that require sequential activity.

B. Processing Time: Allow time for submittal review, including time for resubmittals. Time for review shall commence on Contracting Officer receipt of submittal. No extension of the Contract Time will be authorized because of failure to transmit submittals enough in advance of the Work to permit processing, including resubmittals.

1. Initial Review: Allow 10 days for initial review of each submittal.

2. Resubmittal Review: Allow 10 days for review of each resubmittal.

C. Identify options requiring selection by Contracting Officer.

D. Identify deviations from the Contract Documents on submittals.

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E. General Submittal Procedure Requirements:

1. Electronic Submittals: Contracting Officer’s Representative through the Contracting Officer will return annotated file by e-mail and/or standard mail.

2. Paper Submittals: Submit four (4) paper copies of each submittal unless otherwise indicated. Contracting Officer’s Representative through the Contracting Officer will return three (3) copies.

F. Product Data: Collect information into a single submittal for each element of construction and type of product or equipment.

1. Mark each copy of each submittal to show which products and options are applicable.

2. Include the Manufacturer's product specifications, as applicable.

G. Test and Inspection Reports: Comply with requirements specified in the Statement of Work, Section 1.13 “Quality Requirements.”

H. Closeout Submittals: Comply with requirements specified in Section 1.15 "Closeout Procedures."

I. Review each submittal and check for coordination with other Work of the Contract and for compliance with the Contract Documents. Note corrections and field dimensions.

J. Government’s Action

1. Contracting Officer’s Representative will review each submittal, make marks to indicate corrections or revisions required, and return it. Contracting Officer’s Representative will stamp each submittal with an action stamp and will mark stamp appropriately to indicate action as follows:

a. Approved as submitted.

b. Approved, except as noted. Resubmission not required.

c. Approved, except as noted. Resubmission required.

d. No action taken. See comments on reverse. Resubmission required.

e. Disapproved.

f. Other: (comments as noted)

2. Incomplete submittals are unacceptable, will be considered nonresponsive, and will be returned for resubmittal without review.

1.14 QUALITY REQUIREMENTS

A. Testing and inspecting services are required to verify compliance with requirements specified or indicated. These services do not relieve Contractor of responsibility for compliance with the Contract Document requirements.

1. Specified tests, inspections, and related actions do not limit Contractor's other quality-assurance and -control procedures that facilitate compliance with the Contract Document requirements.

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2. Requirements for Contractor to provide quality-assurance and -control services required by Contracting Officer or authorities having jurisdiction are not limited by provisions of this Section.

3. Specific test and inspection requirements are specified in Part 2 “Execution of Work”.

B. Reports and Documents: Test and Inspection Reports: Prepare and submit certified written reports specified in other Sections. Include the following:

C. Permits, Licenses, and Certificates: For Government's records, submit copies of permits, licenses, certifications, inspection reports, releases, jurisdictional settlements, notices, receipts for fee payments, judgments, correspondence, records, and similar documents, established for compliance with standards and regulations bearing on performance of the Work.

D. Quality Assurance

1. General: Qualifications paragraphs in this article establish the minimum qualification levels required; individual Specification Sections specify additional requirements.

2. Specialists: Certain Sections require that specific construction activities shall be performed by entities who are recognized experts in those operations. Specialists shall satisfy qualification requirements indicated and shall be engaged for the activities indicated.

E. Quality Control

1. Contractor Responsibilities: Tests and inspections not explicitly assigned to Government are Contractor's responsibility. Perform additional quality-control activities required to verify that the Work complies with requirements, whether specified or not.

a. Where services are indicated as Contractor's responsibility, engage a qualified, independent testing agency to perform these quality-control services.

b. Testing and inspecting requested by Contractor and not required by the Contract Documents are Contractor's responsibility.

2. Retesting/Reinspecting: Regardless of whether original tests or inspections were Contractor's responsibility, provide quality-control services, including retesting and reinspecting, for construction that replaced Work that failed to comply with the Contract Documents.

3. Testing Agency Responsibilities: Cooperate with Contracting Officer and Contractor in performance of duties. Provide qualified personnel to perform required tests and inspections.

a. Notify Contracting Officer and Contractor promptly of irregularities or deficiencies observed in the Work during performance of its services.

b. Determine the location from which test samples will be taken and in which in-situ tests are conducted.

c. Conduct and interpret tests and inspections and state in each report whether tested and inspected work complies with or deviates from requirements.

d. Submit a certified written report, in duplicate, of each test, inspection, and similar quality-control service through Contractor.

e. Do not release, revoke, alter, or increase the Contract Document requirements or approve or accept any portion of the Work.

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f. Do not perform any duties of Contractor.

4. Associated Services: Cooperate with agencies performing required tests, inspections, and similar quality-control services, and provide reasonable auxiliary services as requested.

Notify agency sufficiently in advance of operations to permit assignment of personnel.

5. Coordination: Coordinate sequence of activities to accommodate required quality-assurance and -control services with a minimum of delay and to avoid necessity of removing and replacing construction to accommodate testing and inspecting.

a. Schedule times for tests, inspections, obtaining samples, and similar activities.

F. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures”.

1. Copy of Testing Agency’s qualifications.

1.15 TEMPORARY FACILITIES AND CONTROLS

A. General: Installation and removal of and use charges for temporary facilities shall be included in the Contract Sum unless otherwise indicated. Allow other entities to use temporary services and facilities without cost, including, but not limited to testing agencies, and authorities having jurisdiction.

B. Water and Sewer Service from Existing System:

1. Non-potable and potable will NOT be available for use on site. The Contractor shall provide, protect, and maintain an adequate water supply for construction purposes.

2. Electrical power is NOT available for use, the Contractor shall be responsible for providing temporary electrical service for connections and extensions of services as required for construction operations.

C. Sanitary Facilities: Provide temporary toilets, wash facilities, and drinking water for use of construction personnel. Comply with requirements of authorities having jurisdiction for type, number, location, operation, and maintenance of fixtures and facilities.

D. Lighting: Provide temporary lighting with local switching that provides adequate illumination for construction operations, observations, inspections, and traffic conditions.

E. Telephone Service: Provide temporary telephone service cellular telephone or portable two-way radio use by all construction personnel.

F. Equipment

1. Fire Extinguishers: Portable, UL rated; with class and extinguishing agent as required by locations and classes of fire exposures.

2. HVAC Equipment: Unless Government authorizes use of permanent HVAC system, provide vented, self-contained, liquid-propane-gas or fuel-oil heaters with individual space thermostatic control.

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a. Use of gasoline-burning space heaters, open-flame heaters, or salamander-type heating units is prohibited.

b. Heating Units: Listed and labeled for type of fuel being consumed, by a qualified testing agency acceptable to authorities having jurisdiction, and marked for intended location and application.

G. Waste Disposal: Fuels, lubricants, petroleum products, chemicals or other waste materials shall be disposed of in properly designated areas off Government premises.

H. Barricades, Warning Signs, and Lights: Comply with requirements of authorities having jurisdiction for erecting structurally adequate barricades, including warning signs and lighting.

I. Maintenance: Maintain operation of temporary enclosures, heating, cooling, humidity control, ventilation, and similar facilities on a 24-hour basis where required to achieve indicated results and to avoid possibility of damage until removal.

1.16 CLOSEOUT PROCEDURES

A. Submittals Prior to Completion: Complete the following a minimum of 10 days prior to requesting inspection for determining date of Substantial Completion. List items below that are incomplete at time of request.

1. Certificates of Release:

2. Submit closeout submittals specified in individual Sections, including specific warranties, workmanship bonds, maintenance service agreements, final certifications, and similar documents.

3. Submit test/adjust/balance records.

1.17 FINAL CLEANING

A. Perform final cleaning. Conduct cleaning and waste-removal operations to comply with local laws and ordinances and Federal and local environmental and antipollution regulations.

1.18 REPAIR OF THE WORK

A. Repair or remove and replace defective construction. The Contractor shall be liable for damages to roads, pavement, utilities, structures, and property, due to any act, omission, neglect, or misconduct during the period of performance of the services of this contract.

PART 2 - EXECUTION OF WORK

2.1 GENERAL

A. The Contractor shall provide and pay for labor, materials, tools, construction equipment and machinery, transportation and other facilities and services necessary for proper execution and completion of Work, whether temporary or permanent, and whether or not incorporated in the Work.

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B. Preform work in accordance with the approved Construction Documents.

C. Possess and maintain, for the duration of this project, a state license as a general contractor in the State of Montana, if required by the state.

2.2 SITE PREPARATION

A. Prior to excavation all surface vegetation and topsoil, estimated 4-6 inches, shall be stripped from the project areas and stockpiled on site. Stockpile the topsoil adjacent to the work area for later reuse.

B. All stream banks and adjacent areas where excavation occurs or will be disturbed by construction activity shall be protected with temporary erosion control measures (i.e., geotextile fabric, functional silt fence, staked straw bales) during construction activities such that no sediment delivery to the stream occurs.

2.3 DEWATERING

A. Provide temporary grading to facilitate dewatering and control of surface water.

B. Install dewatering systems before excavating below ground-water level, place system into operation to lower water to specified levels. Operate system continuously until structures have been constructed and fill materials have been placed or until dewatering is no longer required.

1. Space well points or wells at intervals required to provide sufficient dewatering.

2. Use filters or other means to prevent pumping of fine sands or silts from the subsurface.

C. Provide an adequate system to lower and control ground water to permit excavation, construction of structures, and placement of fill materials on dry subgrades.

1. Do not permit open-sump pumping that leads to loss of fines, soil piping, subgrade softening, and slope instability.

2.4 EXCAVATION AND EMBANKMENT

A. Excavation of material shall be as shown on the drawings. Permanent cut slopes and slopes for shoulders shall be as shown on the drawings.

B. In fill areas strip vegetation and top soil prior to new fill placement.

C. Excavation shall be made to subgrade elevations and be true to grade. No excavation shall be made below subgrade elevations. Excavations made below subgrade lines shall be filled with native material, as approved by the Contracting Officer, and compacted to set standards.

Excavations shall be level, clean, true to size and clear of loose material.

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D. Any and all excavation for the convenience of the Contractor or over-excavation performed by the Contractor for any purpose or reason except as may be ordered in writing by the Contracting Officer and whether or not due to the fault of the Contractor, shall be at the expense of the Contractor. Where required to complete the work, all such excess excavation and over-excavation shall be refilled with native sand materials, as approved by the Contracting Officer, compacted to set standards, and placed at the expense of and by the Contractor.

E. In the event that it is necessary to remove unsuitable material to a depth greater than specified, the Contracting Officer shall be notified prior to removal of unsuitable material and an adjustment in the contract price shall be made in accordance with the contract. Excavations carried below the depths indicated without specific directions shall, except as otherwise specified, be refilled to the proper grade with native material and compacted to set standards.

All additional work of this nature shall be at the Contractor's expense.

F. Unsuitable material with the exception of stripped vegetation and top soils shall be removed from the site and disposed of at a jurisdictionally accepted waste management facility.

2.5 PLACEMENT AND COMPACTION

A. General: The material shall consist of sound, durable particles of gravel or sand which may include limited quantities of fine soil particles as binding material. It shall be free of sod, roots, and other organic matter.

B. Materials: Embankment material shall be naturally graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sands and clay, 4-inch minus gradation maximum.

C. All fill material must be free of rock over 6” in diameter or other unsuitable materials such as ice or frozen earth, muck, roots and debris.

D. Fill shall be placed in horizontal layers of maximum eight inch compacted material. Thoroughly mix aggregate to provide uniform moisture distribution and compaction as specified before the next layer is placed.

E. Effective spreading equipment shall be used on each lift to obtain a uniform thickness prior to compaction. As the compaction of each layer progresses, continuous leveling and manipulation will be required to insure uniform density.

F. Route hauling equipment uniformly over the full width of the surface to minimize rutting or uneven compaction.

G. The addition of water shall be limited to that needed to obtain optimum moisture content.

Flooding or puddling will not be allowed.

H. Compact the embankment material to minimum of 95 percent of maximum dry density as determined by ASTM D698. Moisture content shall be within 2 percent of optimum.

I. Contractor shall engage a qualified geotechnical engineering testing agency to perform tests and inspections. Allow testing agency to inspect and test subgrades and each fill or backfill layer.

Proceed with subsequent earth moving only after test results for previously completed work comply with requirements.

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J. Testing Schedule

1. Embankment Backfill: One test per vertical foot of fill per fill area including overexcavated areas.

2. Foundation Backfill: One test per two vertical feet of fill per wall.

3. Roadway Base Course: One test per 5,000 square feet (surface area) of material placed;

and minimum three tests for entire area.

K. Materials not meeting the specified moisture content and dry density requirements as specified, as determined by the tests, shall be reworked until approved results are obtained. Reworking may include additional compaction, removal, rehandling, reconditioning, recompaction, or combination of these procedures. No additional allowance or payment shall be made for any additional work required to achieve the placement moisture content and density specified in these specifications.

L. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures”.

1. Gradation reports from aggregate supplier for all materials used.

2. Compaction Test reports with the results of each test as specified.

2.6 ROCK FILL

A. Rock fill shall be angular rock with an average size, D50, of 6 inches. Fill shall be durable stone not made of sandstone, shale, or soft limestone; or not easily abraded or crushed. Rock shall not contain cracks or flaws that would cause splitting or breakup during loading, hauling, and placing.

B. Quarry stone shall be obtained from an undisturbed deposit of rock that, if properly processed, would meet the requirements of concrete coarse aggregate for soundness and abrasion. Local deposits of sandstone, limestone, and similar stone of sedimentary origin shall not be used.

C. The Contractor shall make an effort to select rock fill that is well graded and meets the requirements. The least dimension of a single stone shall not be less than one-third its greatest dimension.

D. The rock fill shall be placed in a manner that will ensure the fill is homogenous; the larger stone shall be uniformly distributed and firmly in contact, one to another, with the smaller rocks and spalls filling the voids between the larger rocks.

E. The rock fill shall be sufficiently manipulated by hand or machine methods to secure a regular surface and mass stability. The rock fill shall be placed to construct a surface that is firm and reasonably true to the desired finished surface as shown on the drawings in grade, alignment, and cross-section.

F. The rock fill shall be placed and spread over the geotextile by methods that do not tear, puncture, or reposition the geotextile. Rock fill stones less than 250 pounds shall not be dropped on the geotextile from a height greater than 3 feet. Stones greater than 250 pounds shall be placed with no free-fall.

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G. All rock fill shall be placed in horizontal lifts to a compacted thickness of 12 inches, maximum.

Lifts shall be thoroughly mixed to provide uniform distribution and compacted using the excavator bucket before the next layer is placed.

H. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures”.

1. Gradation reports from rock fill supplier.

2.7 GEOTEXTILE FABRIC

A. Geotextile shall be a nonwoven, needle-punched geotextiles composed of polypropylene fibers, which are formed into a stable network such that the fibers retain their relative position.

Geotextile shall be resistant to ultraviolet and biological deterioration, rotting, and naturally encountered basics and acids.

B. Geotextile shall meet minimum requirements for AASHTO M288 for Class 1 geotextile and properties below.

1. Weight: 8 oz./sq.yd. per ASTM D 5261

2. Tensile Strength: 200 lbs per ASTM D 4632

3. Tensile Elongation: 50% per ASTM D 4632

4. Trapezoidal Tear Strength: 80 lbs per ASTM D 4533

5. CBR Puncture Strength: 530 lbs per ASTM D 6241

6. Permittivity: 0.7/sec per ASTM D 4491

7. UV Resistance at 500 hours: 70% strength retained per ASTM D 4355

C. The geotextile shall be secured using the manufacturer's recommended methods to hold the geotextile in place during construction activity.

D. Place geotextile as shown on the drawings.

E. Torn geotextile shall be repaired manufacturer's recommended methods.

F. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures”.

1. Manufacturer’s data sheets for geotextile.

2.8 ROADWAY AGGREGATE

A. General: The material shall consist of sound, durable particles of gravel or sand which may include limited quantities of fine soil particles as binding material. It shall be free of sod, roots, and other organic matter. The physical characteristics and quality of the materials shall be approved by the Engineer.

B. Aggregate shall be a 1.5-inch minus crushed gravel meeting Montana DOT Standard Specifications for Road and Bridge Construction for base course gravel.

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C. Determine optimum moisture content according to AASHTO T 180, method D. Mix the aggregate and adjust the moisture content to obtain a uniform mixture with moisture content suitable for compaction.

D. Spread and shape the mixture on the prepared surface in a uniform layer. Do not place the mixture in a layer exceeding 6 inches in compacted thickness. Route hauling equipment uniformly over the full width of the surface to minimize rutting or uneven compaction.

E. Compacting and Finishing Aggregate: Determine the maximum density of the mixture according to AASHTO T 180, method D. Compact each layer full width. Roll from sides to the center, parallel to the centerline of the road. Along curbs, headers, walls and all places not accessible to the roller, compact the material with approved tampers or compactors. Compact each layer to at least 95% of maximum density. Determine the inplace density and moisture content according to AASHTO T 310 or other approved test procedures.

F. Surface Tolerance: Shape the surface to plus or minus 1” of the road width shown on drawings.

Correct all defective areas by loosening the material, adding or removing material, reshaping, and compacting.

G. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures”.

1. Gradation reports from roadway aggregate supplier.

2.9 DELIVERY OF BRIDGE

A. The bridge shall be delivered By FHWA in 6 pieces, they include:

1. 4 – 10-foot long precast concrete sills.

2. 2 – Longitudinal halves of the bridge, each approximately 10 feet wide by 38 feet long with a metal deck and 3.25-inch concrete overlay. The two pieces are attached with a bolted splice along centerline.

3. Bridge sections have been off loaded approximately 400 feet northwest of the project location on the shoulder of Culver Road.

B. To disassemble this bridge the FHWA removed and cut come connections and sections of the bridge, including but not limited to:

1. Saw cut the concrete along centerline down to the bolted splice on the metal deck.

Remove the centerline splice bolts in both the diaphragm and deck.

2. Then lift the two long halves out with the concrete deck still on the bridge.

3. After the bridge is removed the footings welded splices will be cut off and the 4 precast segments removed.

C. The back walls installed at each end of the bridge to hold back the embankment shall not be salvaged. Contractor shall plan on replacement of back walls to design provided on Prefabricated Bridge Shop Drawings.

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D. Removed structural bolts, fasteners and connection plates shall not be salvaged with the bridge.

Contractor shall plan grinding cut plates off of imbedded angles, replacing connection hardware, and metal connection repair.

E. One of the concrete sills was damaged in the process of salvaging the bridge and will require repair.

2.10 INSTALLATION OF BRIDGE

A. Contractor shall evaluate the bridge sections and concrete sills for completeness and damages.

Contact Contracting Officer, Contracting Officer’s Representative, and On-site Inspector if there are damages or repairs required to that are outside the scope of work described

B. Grind, chisel, or clean remnants of welded plates and connections left behind from the FHWA salvage operations.

C. Repair precast concrete sill as shown on Contract Drawings and as specified.

1. Post-installed chemical anchors shall be Alloy Group 2 Estainless-steel bolts, ASTM F 593. Epoxy adhesive anchoring system shall meet the requirements of ASTM C 881, Type IV. Drill, place, and allow the anchor to set per the manufacturer’s written instruction.

2. Bonding of fresh concrete to existing cured concrete shall be done with epoxy bonding adhesive to the entire joint surface.

3. Concrete mix design requirements shall have a minimum compressive strength of 4000 psi at 28 days.

D. Replacing girder bearing pads with ½” neoprene bearing pad with a durometer rating of 50, minimum.

E. Fabricate and replace any decking pieces, plates, steel shapes, and bolts not salvaged and delivered with bridge sections and sills.

1. Structural steel shapes, miscellaneous connections plates, angles, and channels to conform to ASTM A588 weathering steel, fy of 50 ksi. Steel is to be fabricated and erected in accordance with AISC “Code of Standard Practice for Steel Buildings and Bridges”.

2. Welds in accordance with ANSI/AWS D1.5 “Bridge Welding Code”, current edition.

3. Bolts shall be ASTM A325 high strength bolts. All bolts and anchors shall have hot dipped galvanized finish or approved equal.

F. Fabricate and install new steel back walls as shown on prefabricated bridge shop drawings Sheet S4.0.

1. Steel Panel shall be 18 gauge galvanized steel deck conforming to ASTM A611 Grades C, D, or E, fy of 33 ksi, minimum.

2. Steel angles and channels to conform to ASTM A588 weathering steel, fy of 50 ksi.

G. Contractor shall arrange for lifting and placement of bridge and sills.

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H. Replace section of concrete deck cut out to access center line splice. Concrete mix design shall have a minimum compressive strength of 4000 psi at 28 days.

I. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures.”

1. Manufacturer’s data sheets for back wall deck and steel angles.

2. Concrete mix design.

2.11 APPROACH RAILING

A. General: The railing shall be installed to produce a smooth continuous line with uniform height.

B. Railing salvaged and delivered with the bridge shall be reinstalled on new posts and with new hardware.

C. Wood posts shall be weather treated sized and installed to the depth and spacing as shown.

Posts shall be set plumb with the front faces uniformly aligned.

D. Hardware: Bolts, nuts, and washers shall be galvanized in accordance with AASHTO M232, Class C, or AASHTO M298, Class 50, Type 1. All other fittings shall be galvanized in accordance with AASHTO M111.

2.12 OBJECT MARKERS

A. Object markers shall meet the requirements of MUTCD for Type 3 object markers. Striped marker, 12 by 36 inches with alternating black and retroreflective yellow stripes slopping downward at an and of 45 degrees. The minimum width of the yellow and black stripes shall be 3 inches.

B. Posts shall be a weather treated wood or square galvanized metal post sized and installed to the depth as shown. Posts shall be set plumb with the front faces uniformly aligned.

C. Hardware: Bolts, nuts, and washers shall be galvanized in accordance with AASHTO M232, Class C, or AASHTO M298, Class 50, Type 1. All other fittings shall be galvanized in accordance with AASHTO M111.

D. Submit the following in accordance with provisions of Section 1.13 “Submittal Administrative Requirements and Procedures.”

1. Manufacturer’s data sheets on object markers.

2.13 DELINEATORS

A. Delineators shall meet the requirements of MUTCD. Retroreflective elements for delineators shall be single type delineator, have a minimum dimension of 3 inches, and be white.

B. Install delineators as noted on Contract Drawings.

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2.14 GRADING & SITE REMEDIATION

A. The area shall be graded to a smooth, uniform surface conforming to the lines and grades shown on the drawings or established in the field.

B. Spread stockpiled topsoil on edges of embankment and over areas disturbed by construction activities.

END OF STATEMENT OF WORK