FC250 SPS - Final Submittal.doc

FIX CREEK BRIDGE (No. 250 – M.P. 56.0) HIDDEN CREEK BRIDGE (No. 250 – M.P. 57.13)

Clearwater National Forest North Fork Ranger District Clearwater County, Idaho

SPECIAL PROJECT SPECIFICATIONS

Table of Contents 1Preface

101 - Terms, Format, and Definitions 102 - Bid, Award, and Execution of Contract 103 - Scope of Work 104 - Control of Work 105 - Control of Material 106 - Acceptance of Work 107 - Legal Relations and Responsibility To the Public 108 - Prosecution and Progress 109 - Measurement and Payment 151 - Mobilization 155 - Schedules for Construction Contracts 156 - Public Traffic 157 - Soil Erosion Control 203 – Removal of Structures and Obstructions 204 - Excavation and Embankment 208 - Structure Excavation And Backfill For Selected Major Structures 251 - Riprap 272 - Geocell Abutment Stabilization 301 - Untreated Aggregate Courses 622 - Rental Equipment 725 - Miscellaneous Material 736 - Geocell

Preface

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted FP-03 for construction of National Forest System Roads.

101 - Terms, Format, and Definitions

101.01 Meaning of Terms.

Add the following:

Delete all references in FP-03 to Transportation Acquisition Regulations (TAR).

101.03 Abbreviations.

Add the following to (a) Acronyms:

AFPA

MSHA

NIST

NESC

WCLIB

American Forest and Paper Association Mine Safety and Health Administration National Institute of Standards and Technology National Electrical Safety Code West Coast Lumber Inspection Bureau

Add the following to (b) SI Symbols:

Delete (d) Slope notation (vertical : horizontal) and add the following:

Express the slope as the ratio of a number of units horizontal to one unit vertical (1H:1V).

101.04 Definitions.

Delete the following definitions and substitute the following:

Bid Schedule--The Schedule of Items.

Bridge--No definition.

Contractor--The individual or legal entity contracting with the Government for performance of prescribed work. In a timber sale contract, the contractor is the “purchaser”.

Culvert--No definition.

Right-of-Way--A general term denoting (1) the privilege to pass over land in some particular line (including easement, lease, permit, or license to occupy, use, or traverse public or private lands), or (2) Real property necessary for the project, including roadway, buffer areas, access, and drainage areas.

Add the following:

Adjustment in Contract Price--“Equitable adjustment,” as used in the Federal Acquisition Regulations, or “construction cost adjustment,” as used in the Timber Sale Contract, as applicable.

Change--“Change” means “change order” as used in the Federal Acquisition Regulations, or “design change” as used in the Timber Sale Contract.

Forest Service--The United States of America, acting through the Forest Service, U.S. Department of Agriculture.

Neat Line--A line defining the proposed or specified limits of an excavation or structure.

Pioneer Road--Temporary construction access built along the route of the project.

Purchaser--The individual, partnership, joint venture, or corporation contracting with the Government under the terms of a Timber Sale Contract and acting independently or through agents, employees, or subcontractors.

Protected Streamcourse--A drainage shown on the plans or timber sale area map that requires designated mitigation measures.

Road Order--An order affecting and controlling traffic on roads under Forest Service jurisdiction. Road Orders are issued by a designated Forest Officer under the authorities of 36 CFR, part 260.

Schedule of Items--A schedule in the contract that contains a listing and description of construction items, quantities, units of measure, methods of measurement, unit price, and amount.

Utilization Standards--The minimum size and percent soundness of trees described in the specifications to determine merchantable timber.

Add Figure 101-1—Illustration of road structure terms:

Figure 101-1—Illustration of road structure terms.

102 - Bid, Award, and Execution of Contract

102 Delete

Delete Section 102 in its entirety.

103 - Scope of Work

103 Delete

Delete all but subsection 103.01 Intent of Contract.

The Fix Creek Bridge project consists of the construction of a new concrete bridge on Forest Service Road No. 250 at milepost 56.0. This project involves the removal of an existing culvert and the replacement with a new 37’ span by 16’ wide Trideck beam bridge. Improvements consist of but are not limited to structural excavation, excavation and reshaping of the channel, placement of in-stream step pool structures, placement of riprap, installation of precast concrete abutments and prestressed concrete beams, embankment and excavation of the roadway approaches, and road surfacing.

The project is located in the North Fork Ranger District of the Clearwater National Forest, approximately 56 miles from Pierce in Clearwater County, Idaho (Section 16, Township 40 north, Range 10 east). Refer to the location map on the title sheet of the plans.

Work within the stream channel will not be allowed to begin prior to July 1. All work must be completed by September 30, 2010.

The Hidden Creek Bridge project consists of the construction of a new concrete bridge on Forest Service Road No. 250 at milepost 57.13. This project involves the removal of an existing culvert and the replacement with a new 46’ span by 16’ wide Trideck Beam Bridge. Improvements consist of but are not limited to structural excavation, excavation and reshaping of the channel, placement of in-stream step pool structures, placement of riprap, installation of precast concrete abutments and prestressed concrete beams, embankment and excavation of the roadway approaches, and road surfacing.

The project is located in the North Fork Ranger District of the Clearwater National Forest, approximately 57 miles from Pierce in Clearwater County, Idaho (Section 3, Township 40 north, Range 10 east). Refer to the location map on the title sheet of the plans.

Work within the stream channel will not be allowed to begin prior to July 1 and must be completed prior to August 15 unless otherwise approved by the Contracting Officer. All work must be completed by September 1, 2010.

104 - Control of Work

104 Control of Work.

Delete sections 104.01, 104.02, and 104.04.

104.03(a) Specifications and Drawings.

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Furnish 3 sets of drawings and supporting calculations for acceptance 14 days prior to performing work covered by the drawings.

Add the following subsection:

104.06 Use of Roads by Contractor

The Contractor is authorized to use roads under the jurisdiction of the Forest Service for all activities necessary to complete this contract, subject to the limitations and authorizations designated in the Road Order(s) or described in the contract, when such use will not damage the roads or national forest resources, and when traffic can be accommodated safely.

The Contractor shall notify the CO at least 10 days prior to beginning work on the project.

105 - Control of Material

105.02 Material Sources.

Add the following before the first paragraph.

Sources have been designated for this project as follows:

Riprap Source – Government Provided – A Riprap source is located along the 250 Road at mile post 57.4 at the approximate locations shown in the plans. Riprap is buried and may require sorting and cleaning to meet the specified gradation. After all the riprap material has been removed from the site the Contractor shall reshape and reclaim the riprap source to meet the satisfaction of the CO.

Crushed Aggregate Source- Government Provided – The designated source for the crushed aggregate material is the Government stockpile located adjacent to the Kelly Forks Work Center in Section 13, T.39N., R.9E., B.M.

Coarse Granular Backfill – Government Provided – A Coarse Granular Backfill source is located along the 250 Road at mile post 69.0 at the approximate locations shown in the plans. After all the material has been removed from the site the Contractor shall reshape and reclaim the source to meet the satisfaction of the CO.

Waste Site – Government Provided – A waste site for excess and unsuitable material is located as shown on the plans. This site is to be used for the disposal of unsuitable or excess excavated material only. All other materials designated for removal and disposal must be disposed of away from Forest Land as per SPS Section 203.05.

Materials Stockpile Site- Government Provided – Prior to the closure of Road 250 the Contractor will be allowed to stockpile material, including riprap, crushed aggregate, and bridge components, at the Bridge site adjacent to the existing culvert. Materials must be stockpiled in such a manner as to allow for safe passage of the general public along Road 250 and to avoid damage to any trees at the bridge site. Provide the CO 72 hours advance notification prior to stockpiling any materials at the construction sites.

Under (b) Contractor-located sources add the following:

Prior to any pit development or use of materials, the pit site shall be approved by the CO that the pit site is free of noxious weed as listed on the "All States Noxious Weeds List”.

105.02(a) Government Provided Sources.

Add the following:

Comply with the requirements of 30 CFR 56, subparts B and H. Use all suitable material for aggregate regardless of size unless otherwise designated. When required, re-establish vegetation in disturbed areas according to section 625.

105.05 Use of Material Found in the Work.

Delete 105.05 (a) and (b) and the last sentence of the second paragraph and substitute the following:

Materials produced or processed from Government lands in excess of the quantities required for performance of this contract are the property of the Government. The Government is not obligated to make reimbursement for the cost of producing these materials.

106 - Acceptance of Work

106.01 Conformity with Contract Requirements.

Delete Subsection 106.01 and substitute the following:

Follow the requirements of FAR Clause 52.246-12 Inspection of Construction.

References to standard test methods of AASHTO, ASTM, GSA, and other recognized standard authorities refer to the methods in effect on the date of solicitation for bids.

Perform all work to the lines, grades, cross-sections, dimensions, and processes or material requirements shown on the plans or specified in the contract.

Incorporate manufactured materials into the work according to the manufacturer’s recommendations or to these specifications, whichever is more strict.

Plan dimensions and contract specification values are the values to be strived for and complied with as the design values from which any deviations are allowed. Perform work and provide material that is uniform in character and reasonably close to the prescribed value or within the specified tolerance range. The purpose of a tolerance range is to accommodate occasional minor variations from the median zone that are unavoidable for practical reasons.

When standard manufactured items are specified (such as fence, wire, plates, rolled shapes, pipe conduits, etc., that are identified by gauge, unit mass, section dimensions, etc.), the identification will be considered to be nominal masses or dimensions. Unless specific contract tolerances are noted, established manufacturing tolerances will be accepted.

The Government may inspect, sample, or test all work at any time before final acceptance of the project. When the Government tests work, copies of test reports are furnished to the Contractor upon request. Government tests may or may not be performed at the work site. If Contractor testing and inspection is verified by the Government, the Contractor’s results may be used by the Government to evaluate work for acceptance. Do not rely on the availability of Government test results for process control.

Acceptable work conforming to the contract will be paid for at the contract unit bid price. Four methods of determining conformity and accepting work are described in Subsections 106.02 to 106.05 inclusive. The primary method of acceptance is specified in each Section of work. However, work may be rejected at any time it is found by any of the methods not to comply with the contract.

Remove and replace work that does not conform to the contract, or to prevailing industry standards where no specific contract requirements are noted, at no cost to the Government.

(a) Disputing Government test results. If the accuracy of Government test results is disputed, promptly inform the CO. If the dispute is unresolved after reasonable steps are taken to resolve the dispute, further evaluation may be obtained by written request. Include a narrative describing the dispute and a proposed resolution protocol that addresses the following:

(1) Sampling method;

(2) Number of samples;

(3) Sample transport;

(4) Test procedures;

(5) Testing laboratories;

(6) Reporting;

(7) Estimated time and costs; and

(8) Validation process.

If the evaluation requires additional sampling or testing be performed, mutually agree with the Government on witnessing procedures and on sampling and testing by a third party laboratory. Use a third party laboratory accredited by the AASHTO accreditation program. Provide proof of the laboratory’s accreditation for the test procedures to be used. Do not use the same laboratory that produced the disputed Government test results or that produced the test results used as a basis for the dispute.

The CO will review the proposed resolution protocol and may modify it before final approval and execution.

The Government will use the approved resolution protocol test results to determine the validity of the disputed testing. If the Government test results are validated, the Contractor will be responsible for all costs associated with developing and performing the resolution protocol. If the Government test results are not validated, the Government will be responsible for all costs associated with developing and performing the resolution protocol. If the validity of the Government test results cannot be determined, the Contractor and Government will equally share all costs associated with developing and carrying out the resolution protocol.

(b) Alternatives to removing and replacing non-conforming work. As an alternative to removal and replacement, the Contractor may submit a written request to:

(1) Have the work accepted at a reduced price; or

(2) Be given permission to perform corrective measures to bring the work into conformity.

The request must contain supporting rationale and documentation. Include references or data justifying the proposal based on an evaluation of test results, effect on service life, value of material or work, quality, aesthetics, and other tangible engineering basis. The CO will determine disposition of the nonconforming work.

106.07 Delete

Delete subsection 106.07.

107 - Legal Relations and Responsibility To the Public

107.02 Protection and Restoration of Property and Landscape.

Add the following:

On the Fix Creek Bridge project do not work within the wetted perimeter of streams before July 1.

On the Hidden Creek Bridge project do not work within the wetted perimeter of stream before July 1 or after August 15.

107.05 Responsibility for Damage Claims.

Delete the entire subsection.

107.06 Contractor’s Responsibility for Work.

Delete the following.

“except as provided in Subsection 106.07”

107.09 Legal Relationship of the Parties.

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107.10 Environmental Protection.

Add the following:

Design and locate equipment repair shops, stationary refueling sites, or other facilities to minimize the potential and impacts of hazardous material spills on Government land.

Before beginning any work, submit a Hazardous Spill Plan. List actions to be taken in the event of a spill. Incorporate preventive measures to be taken, such as the location of mobile refueling facilities, storage and handling of hazardous materials, and similar information. Immediately notify the CO of all hazardous material spills. Provide a written narrative report form no later than 24 hours after the initial report and include the following:

· Description of the item spilled (including identity, quantity, manifest number, and other identifying information).

· Whether amount spilled is EPA or state reportable, and if so whether it was reported, and to whom.

· Exact time and location of spill including a description of the area involved.

· Containment procedures.

· Summary of any communications contractor had with news media, Federal, state and local regulatory agencies and officials, or Forest Service officials.

· Description of clean-up procedures employed or to be employed at the site including final disposition and disposal location of spill residue.

When available provide copies of all spill related clean up and closure documentation and correspondence from regulatory agencies.

The Contractor is solely responsible for all spills or leaks that occur during the performance of this contract. Clean up spills or leaks to the satisfaction of the CO and in a manner that complies with Federal, state, and local laws and regulations.

108 - Prosecution and Progress

108 Delete

Delete Section 108 in its entirety.

109 - Measurement and Payment

109 Deletions.

Delete the following entire subsections:

109.06 Pricing of Adjustments.

109.07 Eliminated Work.

109.08 Progress Payments.

109.09 Final Payment.

109.02 Measurement Terms and Definitions.

(b) Contract quantity.

Add the following:

Contract quantities will be adjusted only when there are errors in the original design of 15% or more.

Change the following:

“(b) Cubic yard” to “(c) Cubic yard”.

109.02 Measurement Terms and Definitions.

Add the following definition:

(p) Thousand Board Feet (Mbf). 1,000 board feet based on nominal widths, thickness, and extreme usable length of each piece of lumber or timber actually incorporated in the job. For glued laminated timber, 1,000 board feet based on actual width, thickness, and length of each piece actually incorporated in the job.

Add the following Subsection:

109.10 Methods of Measurement.

One of the following methods of measurement for determining final payment is DESIGNATED IN THE SCHEDULE OF ITEMS for each PAY ITEM:

(a) Designed Quantities (DQ). These quantities denote the final number of units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the contract. Changes in the number of units DESIGNATED IN THE SCHEDULE OF ITEMS may be authorized under any of the following conditions:

(1) Changes in the work authorized by the CO.

(2) A determination by the CO that errors exist in the original design that cause a PAY ITEM quantity to change by 15 percent or more.

(3) A written request submitted to the CO showing evidence of errors in the original design that cause the quantity of a PAY ITEM to change by 15 percent or more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is in error.

(b) Stake Quantities (SQ). These quantities are determined from staked measurements prior to construction.

(c) Actual Quantities (AQ). These quantities are determined from measurements of completed work.

(d) Vehicle Quantities (VQ). These quantities are measured or weighed in hauling vehicles.

(e) Lump Sum Quantities (LSQ). These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

151 - Mobilization

151.01 Description

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All temporary or portable signs shall be included as a subsidiary item to section 151. Signs and sign placement shall meet the requirements of the “MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES” (MUTCD), published by the U.S. Department of Transportation, Federal Highway Administration. Work on the project shall not be started until all required signs are in place and approved by the C.O.

Removal and replacement of road closure devices such as concrete barriers or earth barriers to gain access to the project shall be included as incidental to Section 151 Mobilization.

Work also includes cleaning of all equipment used at the project site. Clean all construction equipment prior to entry on the project site. Remove all dirt, plant parts and material that may carry noxious weed seeds into the area. Only construction equipment inspected by the Forest Service will be allowed to operate within the project area. Treat subsequent move-ins of equipment the same as the initial move-in. Clean truck beds and dump boxes hauling to the project site prior to entering the work area.

155 - Schedules for Construction Contracts

155 Delete

Delete Section 155 in its entirety.

156 - Public Traffic

156.03 Accommodating Traffic During Work.

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According to Subsection 106.07(b)

Delete the first paragraph and replace with the following:

Accommodate traffic according to the requirements set forth below, MUTCD, and Section 635. Submit a traffic control plan and a sign plan per the requirements in section H of the contract, for acceptance at least 30 days before intended use.

Notify the CO of length and duration of any road closures 10 days prior to anticipated closures.

Add the following project specific requirements:

The contractor will be allowed to close Road No. 250 at milepost 56.0 and Mile post 57.13 for up to 30 days, including no more than 3 weekends, in the year designated by the Forest Service. Road closures will be limited to one week after July 4 to one week before Labor Day. It is the responsibility of the Contractor to schedule delivery of materials, equipment and all necessary supplies to the sites, to ensure that the Fix Creek Bridge and the Hidden Creek Bridge can be substantially completed within the above specified construction period. The Contractor shall not begin excavation until all bridge materials are on-site unless approved by the CO.

156.08 Traffic and Safety Supervisor.

Delete this subsection in its entirety.

157 - Soil Erosion Control

157.02 Materials.

Add the following:

Provide bales, wattles, logs and rolls from a certified noxious weed free source.

157.03 General.

Add the following:

Prior to the start of construction, submit a written plan for review that provides permanent and temporary erosion control measures to minimize erosion and sedimentation during and after construction. Include methods to minimize disturbance to the stream and prevent runoff from the construction site entering directly into the stream. The “Erosion Control Plan” must address construction activities that have the potential for stream sedimentation including, but not limited to, dewatering the site. When erosion control measures are not functioning as intended, immediately take corrective action 203 – Removal of Structures and Obstructions

203.01 Delete and replace with the following:

This work consists of disposing of clearing slash, salvaging, removing and disposing of buildings, fences, structures, pavements, culverts, utilities, curbs, sidewalks, and other obstructions.

203.05 Disposing of Material.

Modify this subsection as follows:

(a) Remove from project. Add the following:

All culverts designated for removal become property of the Contractor and are to be disposed of by removing off of Forest Service Lands in accordance with all local, state, and federal requirements.

(b) Burn. Delete this section

(c) Bury. Contractor may bury clearing and grubbing debris and excess or unsuitable material at the waste area. Contractor must get approval of location, from CO, prior to burying material.

(e) Scattering. Scatter construction slash outside the clearing limits without damaging trees. Limb all logs. Place logs and stumps away from trees, positioned so they will not roll, and are not on top of one another. Limb and scatter other construction slash to reduce slash concentrations.

204 - Excavation and Embankment

204.11 Compaction.

Delete the first paragraph and replace it with the following:

For compaction method (e) no sieve test is required.

Add the following compaction method:

(e) Layer Placement (Roller Compaction) Method. Place material by end dumping to the minimum depth needed for operation of spreading equipment. Adjust the moisture content of the material to obtain a mass that will not visibly deflect under the load of the hauling and spreading equipment. Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases or, when a sheepsfoot roller is used, the roller “walks out” of the layer. Make at least three complete passes.

204.13 Sloping, Shaping, and Finishing.

Delete section (d) and add the following:

(d) Finishing. Finish the roadbed to be smooth and uniform, and shaped to conform to the typical sections. Remove unsuitable material from the roadbed and replace it with suitable material. Remove all material larger than 6 inches from the top 6 inches of the roadbed and replace with suitable material.

Ensure that the embankment material is visibly moist during shaping and dressing. Bring low sections, holes, cracks, or depressions to grade with suitable material. Maintain proper ditch drainage.

204.14 Disposal of Unsuitable or Excess Material.

Delete the text of the first paragraph and substitute the following:

Dispose of unsuitable or excess material at designated sites or as directed by the Contracting Officer.

208 - Structure Excavation And Backfill For Selected Major Structures

208.04 General.

Add the following:

Use all suitable material in the construction of the roadway embankment and for structural backfill. Field drain and dry excessively wet material that is otherwise suitable for embankment before placement. Place and shape unsuitable or excess material in the designated sites or as directed by the Contracting Officer.

208.11 Compacting.

Delete this section and add the following:

Each layer shall be compacted with mechanical tampers until surface deformation is no longer visible. Adjust the moisture content of the backfill material to a moisture content suitable for compaction.

251 - Riprap

251.07 Acceptance.

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272 - Geocell Abutment Stabilization

Description

272.01 This work consists of constructing geocell abutment stabilization at each abutment using a cellular confinement system such as Presto Geoweb Cellular Confinement System or Webtec TerraCell in accordance with the plans and manufacturers recommendations.

Materials

272.02 Requirements. Ensure that material conforms to specifications in the following subsections:

Granular Backfill Type Government Provided (see Section H)

Geotextile, Type II (A, B, C)

714.01

Geocell

Construction Requirements

272.03 General. Perform the work specified in Section 208 or 209. Use ditches, grading or similar methods to prevent surface runoff that may occur during inclement weather from ponding in the foundation excavation.

272.04 Storage and Handling of Material. During shipment and storage, wrap geotextile materials in heavy-duty protective covering. Protect the material from mud, soil, dust, debris and sunlight prior to installation.

272.05 Geotextile Installation. Place the geotextile according to Section 207. Ensure that the surface upon which the geotextile is to be placed is uniform and is reasonably smooth and free of obstructions, depressions, and debris that could damage the geotextile. Have the surface approved by the CO prior to placing geotextile.

Lay the geotextile without tension, stress, wrinkles or creases. Sew or overlap adjacent strips a minimum of 12” at joints. Insert securing pins through both strips of overlapped geotextile at minimum intervals of 3 feet, but no closer than 2 inches to each edge, to prevent the geotextile from being displaced.

Have the installed geotextile approved by the CO prior to setting the geocells.

272.06 Geocell Installation. Furnish the CO with product literature and certification as required in Section 106.03 for review and approval prior to installation. When requested by the CO, furnish a sample of the geocell from each lot for verification testing.

Place the geocell sections directly on the prepared subgrade. Expand the geocell sections into position at the grades and lines as shown on the plans. Hold the expanded geocell sections with suitable “stretcher frames”, steel stakes driven inside selected outer cell walls, or other similar methods as allowed by the manufacturer prior to filling. Ensure that the individual cells have expanded to the minimum dimensions required by the manufacturer. If necessary field cut sections as per the manufacturer’s recommendations to the lines shown on the plans.

Connect geocell panels in accordance with the manufacturer’s recommendations.

272.07 Infill Placement. Furnish the CO with the manufacturer’s specific recommendations for backfilling prior to placement of the geocells.

Place coarse granular backfill meeting Subsection 703.03 into the expanded cells with equipment appropriate for the site conditions such as a backhoe or a front-end loader. Do not drop infill material more than 3 feet to avoid damage or displacement of the cell walls.

Overfill the geocell cells and level to a minimum of 2 inches above the top of the cell walls. A front-end loader may be used to place the infill provided that it only traffics above geocell sections that have been filled and covered with the minimum 2 inches of additional material. Compact the infill material with a vibratory plate compacter. Operate compaction equipment over the full width of the geocell until visible deformation of the infill ceases. Make at least three complete passes. Grade the surface to be ½ inch above the top of the cells. Ensure that the cell walls are not exposed after fine grading is completed. The Contractor may add a finer grade material, to a maximum depth of 2 inches on top of the infill material to use as a leveling course.

Use the geocell manufacturer’s specific recommendations for backfilling if they are more stringent than stated above.

272.08 Acceptance. Geotextile will be evaluated under Subsections 106.02 and 106.03 and 714.01.

Material for geocell will be evaluated under Subsections 106.2 and 106.03.

Granular backfill material will be evaluated under Section 106.02 and 106.04.

Measurement

272.08 Method. Measure the items listed in the bid schedule according to Subsection 109.02 and the following.

Measure geocell by the square yard in place, exclusive of wastage.

Payment

272.09 Basis. The accepted quantities will be paid for at the contract price per unit of measurement for the Section 272 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

The cost for furnishing and placing the granular backfill required for geocell infill is incidental to this pay item and no separate payment will be made.

The cost for furnishing and placing geotextile for the geocell installation is incidental to this pay item and no separate payment will be made.

301 - Untreated Aggregate Courses

301.05 Compacting.

Delete the first and third paragraphs and add the following:

Compact the aggregate using the following method as specified:

Compaction Method E. Operate compaction equipment over the full width of each layer until there is no visible deformation of the material. Make at least three complete passes. Blade the surface of each layer during the compaction operations to remove irregularities and produce a smooth, even surface.

622 - Rental Equipment

622.02 Rental Equipment.

Delete the first two sentences of the first paragraph and add the following:

Hydraulic Excavator. Provide a track mounted hydraulic excavator, 1990 model year or newer. Bucket must be equipped with a hydraulic "thumb". It is anticipated that an excavator of a size capable of performing the excavation needs for the project, i.e. structure excavation, riprap construction, in-stream structures, etc., will be of an adequate size to be acceptable for any work that the Contractor may be directed to perform under this section. Contractor is required to get approval of the size of the Hydraulic Excavator from the Contracting Officer prior to any work taking place.

Large Dump Truck. Provide a large dump truck with a minimum capacity of 12 cubic yards, 1990 model year or newer.

622.04 & 622.05 Measurement and Payment.

Add the following:

The contractor shall be aware of the following statement within section F of the Contract under FAR 52.211-18 Variation in Estimated Quantities: “Adjustment of contract prices as described in this section shall not apply to section 622…. The government reserves the right to reduce or eliminate entirely the work under this item with no adjustment in the contract unit price.”

725 - Miscellaneous Material

Add the following section:

725.40 High-Strength Nonshrink Grout.

Furnish grout that is packaged and ready for use with the addition of water at the construction site. Ensure that each bag is stamped to show the last date on which it may be used. Use grout that consists of a hydraulic cementitious system, graded and processed natural fine aggregate, and additional technical components such that the product meets the following conditions:

(a) Free of inorganic accelerators, including chlorides.

(b) Free of oxidizing catalysts.

(c) Free of gas-producing agents.

(d) When mixed to 130 percent flow on flow table (ASTM C 230 at 10 drops), it does not reduce in linear dimension when tested in accordance with ASTM C157. Take measurements at 72 hours and 7 days.

(e) Produces no bleeding for the first 2 hours after mixing when mixed to 130 percent flow on flow table (ASTM C 230 at 10 drops), as tested in accordance with ASTM C232.

(f) Has a minimum strength as follows when tested in accordance with ASTM C 109:

(1) After 72 hours, 25 MPa (3500 psi).

(2) At 7 days, 40 MPa (6000 psi).

(3) After 28 days, 50 MPa (7200 psi).

Provide performance characteristics at 115 to 120 percent flow on flow table (ASTM C 230 at 10 drops).

(g) It must be designed, as stated by the manufacturer, to be mixed, placed, and cured at atmospheric temperatures of 5O C to 30O C (40O F to 85O F). Submit products proposed for use for approval by the CO and accompany them with manufacturer’s submittals substantiating all requirements in this subsection, including graphs or charts showing the time, temperature, and humidity requirements for curing to achieve the specified grout strengths; and recommendations for storage, mixing, application, and curing procedures.

As specified as grout on the contract plans, the following products meet the above requirements.

1. MASTERFLOW 928 GROUT, manufactured by Chemrex.

2. CRYSTEX GROUT, manufactured by L&M Construction Chemicals, Inc.

3. CEMENT ALL, manufactured by CTS Cement Manufacturing Co.

4. SURE-GRIP HIGH PERFORMANCE GROUT manufactured by Dayton Superior.

725.41 Mortar.

Furnish mortar that is packaged and ready for use with the addition of water at the construction site. Ensure that each bag is stamped to show the latest date on which it may be used. Use mortar that consists of a cementitious system made up of:

(a) Natural aggregate, 3/8” maximum size, that meets the requirements specified in ASTM C 33 except for grading. Accomplish grading by blending sieve sizes to obtain the optimum density.

(b) Metallic aggregate free from nonferrous material, soluble alkaline compounds, and visible rust.

(c) Water reducers, workability agents, air-entraining agents, and catalysts.

Blend the materials to minimize bleeding, increase workability, resist exposure to freeze-thaw cycles and deicing salts, and prevent shrinkage within and at the perimeter of the patch, keyway, or other area to be filled.

Ensure that the minimum compressive strength of the mortar, as tested by ASTM C 109 for a 3” slump, is:

· 24-hour..........................................................................................35MPa (5000 psi)

· 7-day.............................................................................................60 MPa (8500 psi)

· 28-day........................................................................................70 MPa (10,000 psi)

Ensure that the durability of the products when tested at 300 cycles, ASTM C 666, procedure A is:

Submerged in: DF (%)

Water 98

5% CaCl2 solution 95

5% NaCL solution 85

Ensure that the scaling resistance has a rating of 3, Moderate Scaling, after 50 cycles when tested in accordance with ASTM C 672.

Provide certification from the manufacturer that the product is compatible for work that is 1” or more in depth and more than 1” in width; and where the mixing, placing, and curing temperatures may range from 5O C to 30O C (40O F to 85O F).

Submit products proposed for use to the CO for approval, and accompany them with the manufacturer’s submittals substantiating all requirements in this section, including (1) graphs or charts showing the time, temperature, humidity, and curing requirements to achieve mortar strengths equal to the adjacent concrete; and (2) complete recommendations for storage, mixing, application, and curing procedures.

As specified as mortar on the contract plans, the following products meet the above requirements.

1. EMACO T425 or T430, manufactured by Chemrex.

2. RAPID SET DOT REPAIR MIX manufactured by CTS Cement Manufacturing Co.

3. SURE-GRIP HIGH PERFORMANCE GROUT (when extended with pea gravel) manufactured by Dayton Superior .

736 - Geocell

736.01 Geocell.

Furnish geocell material consisting of sheet strips fabricated from high-density polyethylene (H.D.P.E.), connected in series at off-set, full-depth ultrasonic seams aligned perpendicular to the longitudinal axis of the strips. When expanded, the interconnected strips form the walls of a flexible, three-dimensional cellular confinement structure into which the specified infill material is placed.

736.02 Requirements.

Furnish geocells consisting of polyethylene material treated to resist ultraviolet degradation and conforming to the requirements shown in table 736-1.

Table 736-1 – requirements for geocells.

or

101.6 mm (4”) weld joint supporting load of 72.5 kg (160 pounds) while undergoing temperature change from 23O C to 54O C (74O F to 130O F) on 1 hour cycles.

30 days minimum

7 days minimum i