LOWER_CLEAR_CR_FINAL_SPECS_02_22_19.pdf

Forest Service Supplemental Specifications Lower Clear Creek Trail Bridge

Table of Contents

Table of Contents Preface 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 152 - Construction Survey and Staking 155 - Schedules for Construction Contracts 157 - Soil Erosion and Sediment Control 171 - Weed and Disease Prevention 201 - Clearing and Grubbing 203 - Removal of Structures and Obstructions 204 - Excavation and Embankment 207 – Earthwork Geosynthetics 208 – Structure Excavation and Backfill for Selected Major Structures 571 – Prefabricated Bridges 629 – Rolled Erosion Control Products & Cellular Confinement Systems .. 36 630 – Gabion Basket Abutment Foundation System

Preface Preface_wo_03_15_2004_m

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted FP-14 for construction of National Forest System Roads and Trails.

101 - Terms, Format, and Definitions 101.00_nat_us_07_25_2005

101.01_nat_us_02_17_2005

101.01 Meaning of Terms.

Add the following:

Delete all references in FP-14 to Transportation Acquisition Regulations (TAR).

101.03_nat_us_02_17_2005

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 (c) Metric unit abbreviations and symbols:

mp Milepost ppm Part Per Million

101.04_forest_02_15_2019

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.

http://www.nist.gov/

General Specification Reference Clarification: for this project, all references to “road”, “roadway”, or the like shall be understood to reference “trail” or “trailway”.

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.

Design Quantity-- “Design quantity” is a Forest Service method of measurement from the FS-96 Forest Service Specifications for the Construction of Roads and Bridges.

Under these FP specifications this term is replaced by the term “Contract Quantities”.

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, unit price, and amount.

Trailbed. The finished surface on which base course or surfacing may be constructed.

For trails without surfacing the trailbed is the tread.

Trailway. The portion of the trail within the limits of the excavation and embankment.

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

Add Figure 101-1—Illustration of typical trail corridor:

Figure 101-1—Illustration of typical trail corridor:

102 - Bid, Award, and Execution of Contract 102.00_nat_us_02_16_2005

102 Bid, Award, and Execution of Contract

Delete Section 102 in its entirety.

103 - Scope of Work 103.00_nat_us_02_16_2005

Deletions

Delete all but subsection 103.01 Intent of Contract.

104 - Control of Work 104.00_nat_us_02_17_2005

Deletions

Delete sections 104.01, 104.02, and 104.04.

104.06_nat_us_02_17_2005

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.

105 - Control of Material 105.02_nat_us_05_11_2004

105.02 Material Sources.

105.02(a) Government-Provided Sources.

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.

105.02_forest_12_28_2018

105.02 Material Sources.

Add the following before the first paragraph:

Native Materials that meet the requirements for the Gabion Rock, Geocell durable granular aggregate, and general borrow can be located from within 1 mile of the project site as identified by approved Forest Service Personnel on the ground.

Material sources shall be rehabilitated to blend with the natural wilderness setting.

In all instances topsoil shall be conserved for use in the rehabilitation of the material sources, final slope preparation and/or rehabilitation of the existing trail that is to be removed.

Excess spoils from the Structure Excavation shall be spread and scattered in approved locations near the project site as directed by the Contracting Officer on the ground.

All other materials, including the existing bridge hardware, designated for removal and disposal must be removed from National Forest Land in accordance with FP-14 Section 203.05(a).

Temporary Stockpile Area/Staging Area. – Temporary stockpile/staging areas will be staked on the ground by the Contracting Officer.

105.05_nat_us_05_12_2004

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_nat_us_03_29_2005

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_nat_us_05_11_2004

106.07 Delete

Delete subsection 106.07.

107 - Legal Relations and Responsibility to the Public 107.05_nat_us_05_11_2004

107.05 Responsibility for Damage Claims.

Delete the entire subsection.

107.06_nat_us_04_27_2005

107.06 Contractor’s Responsibility for Work.

Delete the following:

“except as provided in Subsection 106.07”.

107.09_nat_us_05_11_2004

107.09 Legal Relationship of the Parties.

Delete the entire subsection:

107.10_nat_us_02_23_2005

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 108.00_nat_us_02_16_2005

108 Delete.

Delete Section 108 in its entirety.

109 - Measurement and Payment 109.00_nat_us_02_17_2005

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_nat_us_02_23_2005

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.

109.02_0114_us_05_16_2005

109.02 Measurement Terms and Definitions.

Add the following definition:

(s) Actual quantity. (AQ) These quantities are determined from measurements of completed work.

151 - Mobilization 151.01_0105_us_02_23_2005

151.01 Description

Add the following at the end of the last sentence:

“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.”

152 - Construction Survey and Staking

Description

152.00_0402_us_12_21_2006

Delete Section 152 in its entirety and replace with the following.

Description

152.01 This work consists of furnishing qualified personnel and necessary equipment and material to construction stake and record data for the control of work.

Personnel, equipment, and material shall conform to the following:

(a) Personnel. Furnish technically qualified survey crews experienced in highway construction survey and staking. Provide personnel capable of performing in a timely and accurate manner. An acceptable crew supervisor shall be on the project whenever surveying/staking is in progress.

(b) Equipment. Furnish survey instruments and supporting equipment capable of achieving the specified tolerances.

(c) Material. Furnish acceptable tools, supplies, and stakes of the type and quality normally used in highway survey work and suitable for the intended use. Furnish wooden stakes of sufficient length to provide a solid set in the ground with sufficient surface area above ground for necessary legible markings. Furnish 36” lath for grade break and dip locations. Paint stakes and lath as SHOWN ON THE PLANS. Mark all stakes with a stake pencil that leaves a legible imprint, or with waterproof ink.

Keep notes in books with covers that will protect the contents and retain the pages in numerical sequence.

Construction Requirements

152.02 General. Include staking activities in the construction schedule. Include the dates and sequence of each staking activity. When indicated on the plans, a preliminary survey line has been established on the ground. Reestablish missing reference, control lines, or stakes as necessary to control subsequent construction staking operations. Data relating to horizontal and vertical alignment, theoretical slope stake catchpoints, and other design data will be furnished.

Provide immediate notification of apparent errors in the initial staking or in the furnished data.

Preserve all initial reference and control points. After beginning construction, replace all destroyed or disturbed initial reference or control points necessary for the quality control and quality assurance activities associated with the work.

Before surveying or staking, discuss and coordinate the following with the CO:

Surveying and staking methods;

Stake marking;

Grade control for courses of material;

Referencing;

Structure control; and Any other procedures and controls necessary for the work.

Survey and establish controls within the tolerances shown in Table 152-1.

Prepare field notes in an approved format. Furnish all survey notes at least weekly. All field notes and supporting documentation become the property of the Government upon completion of the work.

The construction survey and staking work may be spot-checked for accuracy, and unacceptable portions of work may be rejected. Resurvey rejected work, and correct work that is not within the tolerances specified in Table 152-1. Acceptance of the construction staking does not relieve the Contractor of responsibility for correcting errors discovered during the work and for bearing all additional costs associated with the error.

152.03 Staking Requirements. Perform all staking, recording of data, and calculations as necessary to construct the project from the initial layout to final completion. Reset stakes as many times as necessary to construct the work.

(a) Control points. Relocate initial horizontal and vertical control points in conflict with construction to areas that will not be disturbed by construction operations. Furnish the coordinates and elevations for the relocated points before the initial points are disturbed.

(b) Slope stakes and references. When required, locate slope stakes on designated portions of the trail, as shown on the plans. Locate the slope stake catchpoints and use them to establish clearing limits and slope stake references.

Mark slope stakes with the station, the amount of cut or fill, the horizontal distance to centerline, the slope ratios, and the width "W" from inside shoulder to outside shoulder.

Place slope reference stakes at least 10 feet outside the clearing limit and mark with the offset information to the slope stake as shown on the plans.

Prior to clearing and grubbing operations, move the slope stake outside the clearing limit to the slope reference stake. After clearing and grubbing and before excavation, reset the slope stakes in their original position.

152.04 Acceptance. Construction staking will be evaluated under Subsection 106.02 and 106.04.

155 - Schedules for Construction Contracts 155.00_nat_us_05_11_2004

155 Delete.

Delete Section 155 in its entirety.

157 - Soil Erosion and Sediment Control 157.04_forest_12_28_2018

157.04 General.

Delete the first two paragraphs and add the following:

Submit a Sediment Erosion Control Plan detailing permanent and temporary control measures to minimize erosion and sedimentation during and after construction according to the contract specifications, contract permits, Section 107, and this Section. Contract permits amend the requirements of this Section. Do not modify the type, size, or location of any control or practice without approval. Submit the erosion control plan proposal at least 14 days before operations begin to the Contracting Officer for approval.

Reflect in the erosion control plan special concerns and measures necessary to protect resources and government improvements. Include:

1. The construction activities and sequence of implementation relating to specific erosion control measures.

2. The location and type of permanent controls to be implemented during construction.

3. For work in stream channels with running water a detailed dewatering plan.

4. For work in stream channels without flowing water describe level of ground and vegetative disturbance and measures to reduce potential sediment delivery.

5. Describe what monitoring will take place.

Add to the third paragraph:

All sediment barriers must remain in place for the duration of the project and be maintained in proper working condition. Material shall be removed from behind barriers prior to their final removal. Upon completion of construction at the site, all temporary erosion control measures, dewatering materials and equipment are to be removed from Government property.

The Contractor shall adhere to the following standard practices:

a) The Contractor shall operate in a manner that will protect aquatic organisms.

b) Construct the Dewatering and Sediment Control according to the Contractor’s approved plan.

c) Maintain the trail in a manner that prevents direct entry of surface drainage into the stream.

d) Construct permanent and temporary control features to intercept sediments.

e) Any sanitation facilities established by the Contractor shall be located as designated by the CO.

157.12_forest_12_28_2018

157.12 Temporary Soil Stabilization.

Delete this Subsection.

171 - Weed and Disease Prevention 171.00_nat_us_03_30_2005

171.01 This work consists of washing and treating construction equipment to remove seeds, plants, and plant fragments from the equipment before the equipment enters or is used on National Forest System lands.

Material

171.02 Conform to the following Subsection:

Water 725.01

171.03 General . Notify the CO in writing at least 15 days before moving any construction equipment onto National Forest System lands. Construction equipment does not include cars, pickup trucks, and other vehicles that regularly travel between the construction site and areas outside of National Forest System lands.

Perform all work at a location designated on the plans or other locations approved in writing. Provide the CO with an opportunity to monitor the washing and inspection.

171.04 Equipment. Use a high pressure washing system.

For work on National Forest System lands, use a washing system that traps all wash water and either stores it for removal from National Forest System lands or recycles the water for continued use. If the equipment recycles the water, provide adequate filters for seed removal. Dispose of the filter material and removed seeds in an approved manner.

Do not mix soaps, detergents, or other chemicals with the wash water.

For work at a commercial washing facility, use an approved facility.

171.05 Washing. Wash the sides, tops, and undercarriages of all construction equipment. Remove all seeds, plants, plant fragments, dirt, and debris from the construction equipment.

171.06 Inspection. Inspect the washed construction equipment, including the undercarriage, to ensure that the washing removed the dirt, debris, and seeds from the construction equipment. Rewash the construction equipment as necessary or as directed.

171.07 Acceptance. Weed prevention will be evaluated under Subsection 106.02.

171.08 Aggregate. Contractor shall certify the pit and material derived from the pit is free of noxious weeds listed on the "All States Noxious Weeds List”.

Measurement

171.09 Do not measure weed prevention for payment.

Payment

171.10 Include all costs associated with the Section 171-Weed Prevention in the unit price for Section 151-Mobilization.

201 - Clearing and Grubbing 201.01_nat_us_02_18_2005

201.01 Description

Replace with the following

This work consists of clearing and grubbing within clearing limits and other designated areas.

201.03_forest_12_28_2018

201.03 General.

Trees to be removed will be marked in the field in coordination with the Pinedale District Wilderness Manager or other approved Forest Service personnel. Prior to tree removal, the Contractor shall obtain approval from the Contracting Officer. The Contractor shall provide a minimum of seven (7) days advance warning prior to tree removal operation for coordination with appropriate Forest Service personnel.

201.04_forest_02_15_2019

201.04 Clearing.

Delete subsection (d) and replace with the following:

(d) Trim branches of remaining trees or shrubs to give a clear height of 10 feet above the trailbed and a total trailway clear width of 8 feet unless otherwise indicated. Trim tree limbs as near flush with the trunk as practicable.

201.06_nat_us_02_23_2005

201.06 Disposal.

Delete the first sentence of this subsection and substitute the following:

All merchantable timber within the clearing limits on either private or Government land remains the property of the landowners. Deck according to 201.04(f) on each owner's property adjacent to the road in approved locations.

203 - Removal of Structures and Obstructions 203.05_0114_us_02_15_2005

203.05 Disposing of Material.

(a) Remove from project.

Delete the last two sentences

204 - Excavation and Embankment 204.02_forest_12_28_2018

204.02 Definitions.

(a) Excavation Delete the following definition and substitute the following:

(3) Borrow Excavation: Embankment material necessary to construct the bridge approaches and trails to the lines and grades AS SHOWN ON THE PLANS or AS STAKED ON THE GROUND shall be obtained by utilizing suitable surplus excavation from the bridge construction and the borrow sources identified by the CO. Borrow excavation includes unclassified borrow, select borrow, and select topping.

204.09_forest_12_28_2018

204.09 Preparing Foundation for Embankment Construction.

Delete subsection (a) and replace it with the following:

(a) Embankment less than 4 feet high over natural ground. When designated, remove topsoil and break up the ground surface to a minimum depth of 6 inches by plowing or scarifying. Compact the ground surface using hand tampers and other approved means until no visual displacement is observed.

204.11_forest_12_28_2018

204.13 Sloping, Shaping, and Finishing.

Delete section (d) and add the following:

(d) Finishing. Ensure that the new trailbed is free of rocks and other debris larger than 2 inches at their greatest dimension. Where the trailbed consists predominantly of rock with little or no soil present, remove loose rock in excess of 3 inches. Compact the trail surface using hand tampers and other approved means until no visual displacement is observed. Leave slopes in a uniform and roughened condition.

204.14_nat_us_03_02_2005

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 legally off of the project.

204.17_forest_12_28_2018

204.17. Payment

There shall be no price adjustment for the lump sum bid price for excavation and embankment. The excavation or embankment quantities may vary based on the contractor’s final proposed design package. However, for general information only, the typical design shown in the plans would provide these general estimated quantities: cut quantity of 2 cubic yards and an estimated compacted-in-place fill quantity of 45 cubic yards. These quantities are approximate and may vary substantially as there was no adjustment made for the surface material that will be removed as part of the clearing and grubbing effort. These quantities are simply a comparison between the proposed finish grade surface and the existing ground surface from the topographic survey. The quantities are provided to give the contractor a general idea of work required and not exact numbers for payment.

207 – Earthwork Geosynthetics 207.01_forest_12_28_2018

207.01 Description

Replace with the following;

This work consists of furnishing and installing a Class 1, Type ‘A’, Non-Woven separation geotextile fabric in accordance with the applicable tables in Section 714

207.09_forest_12_28_2018

207.09 Measurement.

Replace with the following:

No measurement will be made for this item.

207.10_forest_12_28_2018

207.10 Payment.

Replace with the following:

Furnishing and installing separation geotextile, along with all other required work, will be considered incidental to the respective Section 629 and Section 630 pay item listed in the Schedule of Items.

208 – Structure Excavation and Backfill for Selected Major Structures

208.02_forest_12_28_2018

208.02 Material.

Add the following:

Conform to the following Section and Subsections:

Unclassified Borrow 704.06

208.03_forest_12_28_2018

208.03 General.

Delete the second paragraph and add the following:

A plan of work shall be submitted in writing and shall describe the procedures, methods, materials, tools and equipment the contractor proposes to use to conduct his excavating operations, including details of shoring and cribbing. Submit the plan of work at least 14 days before operations begin to the Contracting Officer for approval.

It’s important to note that since this project is located within a designated wilderness area, only non-motorized and/or non-mechanized tools and equipment will be allowed. The contractor shall plan their work accordingly with no exception to this requirement.

Add the following to the sixth paragraph:

Structural backfill necessary to construct the bridge approaches to the lines and grades AS SHOWN ON THE PLANS or AS STAKED ON THE GROUND shall be obtained by utilizing suitable surplus excavation from the bridge construction and/or importing suitable structural backfill from the designated borrow source from a location staked on the ground by the Contracting Officer.

571 – Prefabricated Bridges

571.01 This work consists of designing, fabricating, delivering, and installing a prefabricated Fiber Reinforced Polymer (FRP) composite truss clear span trail bridge AS SHOWN IN THE PLANS. This work also includes appurtenances such as anchorages, connections, railing, treated timber decking, rub rails, backing planks, and laminated sill members, bearing connections to respective geocell and gabion basket foundations, shop drawings, calculations, and other incidentals as required.

571.02 Conform to the following Subsection:

Timber Structures 557 Hardware 716.02 Treated Structural Timber and Lumber 716.03

(a) FRP Composites

FRP bridges shall be fabricated from high-strength E-glass and isophthalic polyester resin unless otherwise specified. Weathering and ultraviolet light protection shall be provided by addition of a veil to the laminate construction.

Minimum characteristic design strengths, per ASTM D7290 are as follows:

• Tension 59,150 psi ASTM D638

• Compression 43,363 psi ASTM D6641

• Shear (In-plane) 9,773 psi ASTM D5379

• Shear (Interlaminar) 3,969 psi ASTM D2344

• Young’s Modulus 3,870,000 psi ASTM D6641 & D638 (Taken as the mean of the lessor of the two)

Minimum thickness of FRP Composite shapes shall be as follows unless otherwise specified:

• Square tube members (closed type shape) shall be 0.25 in.

• Wide-flange beams, channel sections, and angles (open type shapes) shall be a minimum thickness of 0.25 in.

• Standard plate shall be a minimum thickness of 0.25 in.

(b) Bolted Connections and Mounting Devices

• Bolted connections shall be A307 hot-dipped galvanized steel unless otherwise specified.

• Mounting devices shall be galvanized or stainless steel.

571.03 Design Requirements. For required loadings use the most recent AASHTO LRFD Bridge Design Specifications and the design loads shown on the DRAWINGS and other criteria as listed below. Structural design of complete bridge structure shall be performed by or under the direct supervision of a Licensed Professional Engineer and done in accordance with recognized engineering practices and principals.

(a) Camber Bridges to be pre-cambered to eliminate initial dead load deflection.

(b) Additional Loading/Deflection/Vibration Criteria:

• Equestrian Load – Concentrated load of 1,500 lbs. (which accounts for horse and rider)

• Wind Load – Minimum wind load tolerance of 25 psf, calculated on the entire vertical surface of the bridge as if fully enclosed.

• Seismic Load – In accordance with current IBC including Response

Spectrum Analysis as applicable.

• Deflection – Live Load deflection = L/240

• Frequency – Vertical = >5.0 Hz; Horizontal = >3.0 Hz

571.04 Design Drawings. Submit design drawings, calculations, and shop drawings at least 21 days in advance of the start of fabrication to allow time for review and correction of any changes and approval by the CO. Include plan, elevation, and section views of the modular bridge superstructure, dimensions of all components, connection details, and general and specific notes regarding design and construction.

571.05 General

These specifications are for a fully engineered clear span bridge of Fiber Reinforced Polymer (FRP) composite construction and shall be regarded as the minimum standards for design and construction.

The FRP bridge manufacturer shall be an ISO9001:2015 accredited company for the design and manufacture of FRP structural components and systems. The company shall have been in the business of design and fabrication of bridges for a minimum of ten years.

Bridge must be designed as a FRP Composite Truss Span.

All members shall be fabricated from pultruded FRP composite profiles and structural shapes as required.

Bridge manufacturer shall preassemble bridge system prior to shipment to ensure that all members fit together as intended. No field cutting or drilling will be allowed.

Refer to DRAWINGS for additional requirements including but not limited to preservative treatment use category.

Dispose of all debris resulting from bridge installation operations in accordance with Section 203.05(a).

571.06 Tolerances

All cutting and drilling fabrication to be done by experienced fiberglass workers using carbide or diamond tipped tooling to a tolerance of 1/16”. No material deviations beyond industry standards will be accepted. All cut edges to be cleaned and sealed.

Pultruded profiles shall be manufactured to the dimensional requirements as set forth in ASTM D3917 and the visual requirements as set forth in ASTM D4385.

4.

571.07 Railings

Railings should be a minimum of 54” above the floor deck and support three treated rub rails located on the inside of the trusses as shown on the DRAWINGS.

571.08 Performance. Notify the CO at least 7 days before delivering the bridge.

Provide appropriate equipment and labor necessary to unload and stack all components of the prefabricated FRP composite trail bridge system upon delivery to the end of the road project staging area. Support and stack all components to prevent damage. Furnish and install blocking to support all components at least 12 inches above the ground.

Prefabricated FRP composite trail bridge system supplier shall provide complete assembly drawings and a recommended assembly procedure for building the bridge.

Contractor shall provide temporary supports and other necessary materials to facilitate bridge assembly.

Provide bridge supplier recommended field treatment application material for protection of FRP bridge system components that get scraped, scratched, etc. during the installation process to ensure member longevity and visual appeal following construction.

571.09 Warranty

Prefabricated FRP composite trail bridge system supplier shall warrant the structural integrity of all FRP materials, design and workmanship for 15 years.

571.10 Measure the Section 571 items listed in the bid schedule according to Subsection 109.02.

571.11 The accepted quantities, measured as provided in Subsection 109.02 and above, will be paid at the contract price per unit of measurement for the Section 571 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05

629 – Rolled Erosion Control Products & Cellular Confinement Systems

629.01_forest_12_28_2018

Replace the subsection with the following:

629.01 This work consists of constructing a geocell foundation on firm undisturbed soil including furnishing all required geocell material, fasteners, etc. and all work associated with furnishing and installing suitable durable select borrow material found onsite for filling geocells. Work also includes furnishing and installing non-woven geotextile separation fabric in accordance with the Contract Plans.

629.02 Conform to the following subsections:

Add the following to the end of this subsection:

Select Borrow 704.07 Non-Woven Geotextile Separation Fabric (Class 1, Type ‘A’) 714.01(a)

629.06 Cellular Confinement System

Replace the subsection with the following:

Set geocell cellular confinement system on a firm, level foundation. Fill the cells with approved select borrow and hand-compact until no vertical displacement is observed.

Connect adjoining gabion geocell cellular confinement section as applicable with durable fasteners per manufacturer’s recommendations.

Separation geotextile fabric shall be placed underneath, behind, and over top of geocell to keep suitable backfill material from contaminating geocell aggregate base material.

630_forest_12_28_2018

Add the following new Section 630

630 – Gabion Basket Abutment Foundation System

Description

630.01 This work consists of constructing a gabion basket foundation on firm undisturbed soil including furnishing all required basket material, fasteners, etc. and all work associated with filling baskets with durable, gabion rock material found onsite as approved by the Contracting Officer. Work also includes furnishing and installing non-woven geotextile separation fabric in accordance with the Contract Plans.

630.02 Conform to the following subsections:

Gabion Rock 705.01 Non-Woven Geotextile Separation Fabric (Class 1, Type ‘A’) 714.01(a)

Gabion baskets shall be constructed using wire mesh (U.S. Standard Gage 9) and be galvanized.

630.03 Set baskets on a firm, level foundation. Fill baskets with gabion rock material, using care to ensure that placed rock is tightly packed together with minimal voids, while also keeping the mesh straight, vertical and free of bulges. Connect adjoining gabion basket material with durable metal fasteners per manufacturer’s recommendations.

Separation geotextile fabric shall be placed underneath, behind, and over top of basket to keep suitable backfill material from contaminating gabion rock material.

630.04 Measure the Section 630 pay items listed in the bid schedule according to Subsection 109.02.

630.05 The accepted quantities will be paid at the contract price per unit of measurement for the Section 630 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.