Attachment__1_Specifications.pdf

Forest Service Supplemental Specifications Deer Creek #2 Bridge Replacement

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 154 – Contractor Sampling and Testing 155 - Schedules for Construction Contracts 156 - Public Traffic 157 - Soil Erosion and Sediment Control 170 - Develop Water Supply and Watering 171 - Weed and Disease Prevention 201 - Clearing and Grubbing 203 - Removal of Structures and Obstructions 204 - Excavation and Embankment 205 – Rock Blasting 207 – Earthwork Geosynthetics 208 – Structure Excavation and Backfill for Selected Major Structures 251 - Riprap 301 – Aggregate Courses 403 – Asphalt Concrete 557 – Timber Structures

Attachment #1-12026119A0022

Preface

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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.

101 - Terms, Format, and Definitions

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101.01 Meaning of Terms.

Add the following:

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

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101.03 Abbreviations.

Add the following to (a) Acronyms:

AGAR

AFPA

FSAR

MSHA

NESC

WCLIB

Agriculture Acquisition Regulations American Forest and Paper Association Forest Service Acquisition Regulations Mine Safety and Health Administration National Electrical Safety Code West Coast Lumber Inspection Bureau

Add the following new subpart (f):

(f) Miscellaneous unit abbreviations.

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101.04 Definitions.

Delete the following definitions and replace with the following:

Bid Schedule--The Schedule of Items.

Bridge-- A structure, including supports, erected over a depression or an obstruction such as water along a road, a trail, or a railway and having a deck for carrying traffic or other loads.

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”.

MP milepost (location) ppm parts per million (volume)

STA Station (location)

Culvert-- Any structure with a bottom, regardless of fill depth, depth of invert burial, or presence of horizontal driving surface, or any bottomless (natural channel) structure with footings that will not have wheel loads in direct contact with the top of the structure.

Drawings -- (Public Works Contracts) Design sheets or fabrication, erection, or construction details submitted to the CO by the Contractor according to FAR Clause 52.236-21 Specifications and Drawings for Construction. Also refers to submissions and submittals.

Notice to Proceed -- (Public Works Contracts) Written notice to the Contractor to begin the contract work.

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.

Solicitation -- (Public Works Contracts) The complete assembly of documents (whether attached or incorporated by reference) furnished to prospective bidders.

Add the following definitions:

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.

Shop Drawings — (Timber and Stewardship Contracts) Referred to as “Drawings” in FP-14, include drawings, diagrams, layouts, schematics, descriptive literature, illustrations, lists or tables, performance and test data, and similar materials furnished by Purchaser to explain in detail specific portions of the work required by the contract.

Utilization Standards-- The minimum size and percent soundness of trees described in Public Works contract specifications or Timber Sale and IRTC contract provisions to determine merchantable timber.

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

Figure 101-1—Illustration of road structure terms.

R ig h t o f

W a y R o ad si de

R o ad si de

C le ar in g W id th

R oa d w ay C le a rin g

L im it X

Y

G ro un d

L in e

T ra ve le d W a y

C L B er m

S ur fa ce

C o ur se

B a se C o u rs e

F ill

S lo pe

B ac k S lo pe

D ra in ag e D itc h

G ro u nd

L in e

S u bg ra d e

R o ad B ed

S h a p e s a n d d im e ns io ns w ill v a ry to fi t lo ca l c on di tio n s.

S e e d ra w in g s fo r ty pi ca l s e ct io ns

X a n d Y d e no te c le a rin g o u ts id e o f r o ad w ay

N o te

Right - of - Way Line

Right - of - Way Line

Clearing Limit

Shoulder

Shoulder

102 - Bid, Award, and Execution of Contract

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102 Bid, Award, and Execution of Contract

Delete Section 102 in its entirety.

103 - Scope of Work

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Delete all of Section 103 except Subsection 103.01 Intent of Contract.

104 - Control of Work

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Delete Subsection 104.01, 104.02, and 104.04.

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Add the following new 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

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105.02 Material Sources.

Add the following before the first paragraph:

Sources have been designated for this project as follows:

Crushed Aggregate Base Source - Contractor Furnished - There is no available Government source for Crushed Aggregate Base (Under Asphalt – Grading ‘D’) for this project. The Forest Service has not obtained any commitment for price, quantity, quality, or availability for commercial material. Bidders must make their own determinations regarding acquisition of Crushed Aggregate that meets the requirements of the project.

Prior to development of a new Crushed Aggregate source and/or use of materials from a previously developed Crushed Aggregate source pit, the pit site and/or developed Crushed Aggregate material shall be approved by the CO and the Contractor shall certify the pit and material derived from the pit is free of noxious weeds listed on the "All States Noxious Weeds List”.

Crushed Aggregate Surfacing - Government Furnished – Crushed Aggregate Surfacing material required for this project will be furnished by the Government and will come from an existing source located adjacent to FS Road #097 within one (1) mile of the project. This aggregate surfacing source will be STAKED ON THE GROUND by the CO.

Borrow Source – Government Furnished – Borrow material for this project, if required, will be furnished by the Government and will be stockpiled prior to beginning work in the immediate vicinity of the project in a location STAKED ON THE GROUND by the CO.

Excess spoils from the Structure Excavation shall be stockpiled at the project site.

The exact location for disposal of excess spoils will be AS STAKED ON THE

GROUND.

Temporary Stockpile Area/Staging Area. – Temporary stockpile/staging areas will be staked on the ground by the CO. These may include the roadway area adjacent to the project site and other appropriate areas as approved by the CO.

106 - Acceptance of Work

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106.01 Conformity with Contract Requirements.

Delete Subsection 106.01 and replace with 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, repair, or replace work that does not conform to the contract, or to prevailing industry standards where no specific contract requirements are noted. Removing, repairing, or replacing work; providing temporary traffic control; and any other related work to accomplish conformity will be 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.

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106.02 Visual Inspection.

Delete Subsection 106.02 and replace with the following:

Acceptance is based on visual inspection of the work for compliance with the specific contract requirements. Use prevailing industry standards in the absence of specific contract requirements or tolerances.

107 - Legal Relations and Responsibility to the Public

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107.05 Responsibility for Damage Claims.

Delete this entire subsection.

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107.10 Environmental Protection.

Supplement subsection (b) Oil and hazardous substances with 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

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Delete Section 108 in its entirety.

109 - Measurement and Payment

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Delete the following entire subsections:

109.06 Pricing of Adjustments.

109.07 Eliminated Work.

109.08 Progress Payments.

109.09 Final Payment.

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109.02 Measurement Terms and Definitions.

(b) Contract quantity.

Add the following to this subsection:

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

151 - Mobilization

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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.

154 – Contractor Sampling and Testing

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154.01 Description.

Delete this Subsection in its entirety and replace with the following:

This work consists of obtaining samples for testing, performing the tests, and reporting the test results.

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154.03 Testing.

Delete the first sentence and replace with the following:

Perform all tests required by the Sampling and Testing Requirements tables at the end of each Section.

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154.06 Measurement.

Delete this Subsection in its entirety and replace with the following:

Do not measure Contractor Sampling and Testing for payment.

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154.07 Payment.

Delete this Subsection in its entirety and replace with the following:

Do not measure Contractor Sampling and Testing for payment. Compensation is made as an indirect payment.

155 - Schedules for Construction Contracts

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Delete Section 155 in its entirety.

156 - Public Traffic

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Delete Section 156 in its entirety and replace with the following:

Description

156.01 This work consists of controlling and protecting public traffic adjacent to and within the project limits.

Material

156.02 Conform to the MUTCD and the following Sections and Subsections:

Construction sign panels 633 Retroreflective sheeting 718.01 Temporary concrete barrier 618 Temporary plastic fence 710.11 Temporary traffic control devices 718

156.03 General. Keep existing roads open to all traffic during road improvement work, and maintain them in a condition that will adequately accommodate traffic.

Perform no work that interferes or conflicts with traffic or existing access to the roadway surface until a traffic control plan has been approved. Post construction signs and traffic control devices in conformance with MUTCD. All required signs will be in place and approved prior to beginning work on project.

If the Contractor agrees in writing to allow public traffic to use a new road being constructed prior to completion, it will be considered an existing road for traffic control purposes.

156.04 Temporary Traffic Control. Install and maintain temporary traffic control devices adjacent to and within the project as required by the approved traffic control plan and the MUTCD. Install and maintain traffic control devices as follows:

(a) Furnish and install traffic control devices before the start of construction operations.

(b) All detours outside of clearing limits will be approved in writing by the Contracting Officer as part of the traffic control plan.

(c) Install only those traffic control devices needed for each stage or phase.

(d) Relocate temporary traffic control devices as necessary.

(e) Remove devices that no longer apply to the existing conditions.

(f) Immediately replace any device that is lost, stolen, destroyed, or inoperative.

(g) Keep temporary traffic control devices clean.

(h) Remove all temporary traffic control devices upon contract completion or when approved.

(i) When required, use flaggers certified by the American Traffic Safety Services Association, the National Safety Council, the International Municipal Signal Association, a state agency, or other acceptable organization. Perform the work described under MUTCD Part 6. Use type III, VII, VIII, or IX retroreflective sheeting on flagger paddles. Do not use flags. Flaggers must wear high visibility safety apparel as required by MUTCD 6E.02.

156.05 Temporary Closures. Road closures are not permitted as the majority of this project work occurs outside the existing road area. Forest Road #097 shall remain open at all times during the project construction with allowance for short-duration delays not to exceed 15 minutes followed by an open period of at least 5 minute with use of flaggers or an approved traffic control plan. The Contracting Officer will allow minimal road closures for bringing in the crane, setting the bridge, etc.

Acceptance. Public traffic work will be evaluated under Subsection 106.02.

Measurement and Payment

156.07 Do not measure Public Traffic for payment. Compensation is made as an indirect payment.

157 - Soil Erosion and Sediment Control

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157.04 General.

Delete the first two paragraphs and add the following:

Submit a Dewatering and 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 road 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.

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157.09 Water Crossings.

At any channel crossing where there is running water dewater by rerouting water flow around the site before and during excavation and embankment operations.

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157.12 Temporary Soil Stabilization.

Delete Subpart (b) Temporary turf establishment from this Subsection.

170 - Develop Water Supply and Watering

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170.01 This work consists of developing an acceptable water supply and restoring it to pre-construction condition or better as determined by the CO, following completion of the work. Work also includes obtaining a temporary water right permit, as required by the Idaho Department of Water Resources, along with paying any associated fees that are required for this permit.

Materials

170.02 Conform to the following subsection.

Water 725.01

Construction Requirements

170.03 Temporary Water Right Permit. Contractor shall fill out the required “Application for Temporary Approval of Water Use” permit request, Idaho Department of Water Resources standard form 202A, and obtain approval prior to development and use of intended water drafting site. Online form can be found at https://www.idwr.idaho.gov/forms/water-rights.html

170.04 Development of Supply & Access. Water can be drafted from Deer Creek within a mile of the project location in a location approved by the CO that does not impede traffic or inconvenience the public.

Water drafting may only occur during daylight hours.

Contractor’s drafting equipment and operations shall be as such to limit suction velocities within the intake influence area to less than 0.40 feet per second. Pump intake screens shall be oriented longitudinally (or parallel) to the stream flow direction and shall have a maximum screen opening size of 3/32”.

Pumps shall be enclosed in a containment basin having 110% of the pumps fuel capacity.

170.05 Equipment. All drafting equipment to be placed in the water shall be disinfected in order to ensure the equipment is clean and free of any substance that could be injurious to plants and wildlife.

Provide mobile watering equipment with watertight tanks of known capacity. Provide for positive control of water application from the driver’s position.

170.06 Application. Apply water uniformly without ponding or washing.

170.07 Acceptance. Developing water supplies and watering will be evaluated under Subsections 106.02 and 106.04.

Measurement

170.08 Measurement.

All work associated with developing a water supply and watering required by the Contract is included under other applicable Sections.

Payment

170.09 Payment.

All costs associated with this Section 170 work shall be included in other applicable Sections.

171 - Weed and Disease Prevention

171.00_forest_02_01_2019

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

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”.

171.09 Do not measure weed prevention for 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

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201.01 Description

Replace this Subsection with the following

All work associated with clearing and grubbing within the project clearing limits will be performed by others prior to beginning construction work activities for this project.

203 - Removal of Structures and Obstructions

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203.05 Disposing of Material.

(a) Remove from project.

Delete the last two sentences of this Subsection

204 - Excavation and Embankment

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Description

204.01.

Add the following to the end of this Subsection:

Excavation and embankment required to construct the new road approaches on either side of the new bridge structure will be performed by others prior to beginning construction work activities for this project. This “by other” work will render the roadway approaches built to within approximately ten (10) feet of the stream channel edge on either side of the new bridge.

Some minor excavation and embankment construction shall be expected in order to render a smooth, uniform, compact connection of the new roadway approach subgrade on either side of the new bridge structure using excess borrow material stockpiled near the site “by others” if required.

Excavation and backfill of new bridge structure, including any required finish shaping, blending, compacting, etc. of the road approach embankment connection to this new structure and appurtenant items, shall be included under Section 208.

205 – Rock Blasting 205.00_national_11_8_2016

Add the following to Subsection 205.03:

205.03 Regulations

(e) Forest Service. For projects in National Forest Service lands, comply with Forest Service Manual (FSM) 6745, Explosives and Blasting Materials.

Add the following to Subsection 205.06:

205.06 Preblast condition survey and vibration monitoring and control.

Limit blasting induced vibrations in saturated soils or on steep slopes as designated or as directed by the CO.

Notify the owners of nearby utilities at least 24 hours before blasting.

Add the following to Subsection 205.07:

205.07 Test Blasting.

Test blast at all new sources, when rock type changes, and when blast layout changes due to slope or other changes.

Add the following to the bulleted list in the eighth paragraph of Subsection 205.08:

205.08 Blasting.

Precipitation exceeds 1 inch in any 24 hour period.

Precipitation exceeds 3 inches in any 96 hour period.

Precipitation exceeds 4 inches in any 144 hour period.

A landslide occurs within 300 feet of a blast site under any precipitation conditions.

207 – Earthwork Geosynthetics

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207.09 Measurement.

Delete this Subsection in its entirety and replace with the following:

Do not measure Earthwork Geosynthetics for payment.

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207.10 Payment.

Delete this Subsection in its entirety and replace with the following:

Do not measure Earthwork Geosynthetics for payment. Compensation is made as an indirect payment.

208 – Structure Excavation and Backfill for Selected Major

Structures

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208.02 Material.

Add the following:

Conform to the following Section and Subsections:

Aggregate 703.05 208.03_forest_02_01_2019

208.03 General.

Delete the second paragraph.

Add the following:

A plan of work shall be submitted in writing and shall describe the procedures, methods, materials, 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.

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 from excess earthen excavation material stockpiled within one (1) mile of the project location by others from the road construction work that will take place prior to beginning work on this project.

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208.11 Acceptance.

Table 208-1 (Sampling, Testing, and Acceptance Requirements)

Delete the “Foundation Fill” listed density sampling frequency and replace with the following:

2 per lift

251 - Riprap

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251.07 Acceptance.

Delete sampling and testing requirements for all riprap.

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Delete Section 301 in its entirety and replace with the following:

301 – Aggregate Courses

Description

301.01 This work consists of constructing one or more courses of aggregate on a prepared surface.

Surface aggregate will be Government-furnished from a location adjacent to FS Road #097 within one (1) mile of the project AS STAKED ON THE GROUND by the CO.

Subbase and base aggregate grading is designated as shown in Table 703-2.

301.02 Conform to the following Subsections:

Aggregate 703.05 Water 725.01(c)

301.03 General. Prepare the surface on which the aggregate course is placed according to Section 204 or 303 as applicable, and have it approved in writing by the CO before placing aggregate.

Develop, haul, and apply water in accordance to Section 170.

Submit target values within the gradation ranges shown in Table 703-2 or 703-3 for the required grading. After reviewing the proposed target values the CO will determine the final values for the gradation and notify the Contractor in writing.

After processing on the road, remove all oversize material from the road and dispose of it as directed by the CO.

If the aggregate is produced and stockpiled before placement, handle and stockpile in an approved manner to avoid segregation of material size. Establish stockpile sites at approved locations as applicable.

301.04 Mixing and Spreading. Mix the aggregate and adjust the moisture content to obtain a uniform mixture with a moisture content suitable for the specified compaction method.

Spread and shape the mixture on the prepared surface in a uniform layer with no segregation of size, and to a loose depth that will provide the required compacted thickness.

Do not place in layers exceeding 6 inches in compacted thickness for aggregate base and surface courses or twice the maximum particle size for screened aggregate. When more than one layer is necessary, compact each layer according to Subsection 301.05 before placing the next layer. Route hauling and leveling equipment uniformly over the full width.

When placing aggregate over geotextile, place aggregate in a single lift to the full depth specified.

301.05 Compacting. Compact each layer full width. Roll from the 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 the aggregate using one of the following methods as specified in the schedule of items:

Compaction A. Operating spreading and hauling equipment over the full width of each layer of the aggregate.

Compaction B. Operate rollers over the full width of each layer of the aggregate until visual displacement ceases, but not fewer than three complete passes. Use rollers as specified in Subsection 322.05(a).

Compaction C. Moisten or dry the aggregate to a uniform moisture content between 5 and 7 percent based on total dry weight of the mixture. Operate rollers and compact as specified in Subsection 204.11(a)(1).

Compaction D. Compact to a density of at least 95 percent of the maximum density, as determined by AASHTO T 99, method C or D.

For all compaction methods, blade the surface of each layer during the compaction operations to remove irregularities and produce a smooth, even surface. When a density requirement is specified, determine the in-place density and moisture content according to AASHTO T 310 or other approved test procedures.

(a) Rollers. Use rollers that meet the following minimum requirements:

(1) Steel wheeled rollers, other than vibratory, capable of exerting a force of not less than 250 pounds per inch of width of the compression roll or rolls.

(2) Vibratory steel wheeled rollers equipped with amplitude and frequency controls with a minimum weight of 6 tons, specifically designed to compact the material on which it is used.

(3) Pneumatic-tired rollers with smooth tread tires of equal size that will provide a uniform compacting pressure for the full width or the roller and capable of exerting a ground pressure of at least 80 psi.

For all compaction methods, blade the surface of each layer during the compaction operations to remove irregularities and produce a smooth, even surface. When a density requirement is specified, determine the in place density and moisture content according to AASHTO T 310 or other approved test procedures.

301.06 Thickness and Width Requirements. Ensure that the thickness and width of the compacted aggregate conform to the dimensions shown on the plans, and that measurements on the compacted aggregate meet the following criteria:

(a) The maximum variation from the specified thickness is 1 inch.

(b) The compacted thickness is not consistently above or below the specified thickness.

(c) Ensure that the compacted width is not consistently above the specified width.

The maximum variation from the specified width will not exceed +12 inches at any point.

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

301.07 Maintenance. Maintain the aggregate course to the correct line, grade, and cross-section by blading, watering, rolling, or any combination thereof until placement of the next course. Correct all defects according to Subsection 301.06.

301.08 Acceptance. See Table 301-1 or Table 301-2 as applicable, for sampling and testing requirements.

Aggregate gradation and surface course plasticity index will be evaluated under Subsection

106.04. If the aggregate is obtained from a Government stockpile then the above characteristics will be evaluated under Subsection 106.02. Other aggregate quality properties will be evaluated under Subsections 106.02 and 106.04. Placement of aggregate courses will be evaluated under Subsections 106.02 and 106.04.

The allowable upper and lower aggregate gradation limits are the Target Value plus or minus the allowable deviations shown in Tables 703-2 and 703-3.

The allowable upper and lower Plasticity index limits for surface courses are stated in 703.05(b).

Preparation of the surface on which the aggregate course is placed will be evaluated under Section 204 or 303 as applicable.

301.09 Measure the Section 301 items listed in the bid schedule according to Subsection

109.02 and the following as applicable.

Measure aggregate by the cubic yard, compacted in place.

Measure thickness perpendicular to the grade of the travel way.

Measure width perpendicular to the centerline.

301.10 The accepted quantities will be paid at the contract price per unit of measurement for the Section 301 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

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403 – Asphalt Concrete

403.02_forest_02_01_2019

403.02 Composition of Mix (JMF).

Add the following to the end of the first paragraph:

Asphalt nominal aggregate size shall be 1/2" maximum.

403.12_forest_02_01_2019

403.12 Acceptance, Table 403-2.

Revise as follows:

Sampling frequency for density shall be a minimum of three (3) per lane which corresponds to one along each road approach and one within the bridge deck footprint.

557 – Timber Structures

557.01_forest_02_01_2019

Replace this subsection in its entirety with the following:

557.01 This work consists of designing, fabricating, delivering, and installing a treated structural timber glue-lam panel bridge system AS SHOWN IN THE PLANS. The work also includes appurtenances such as anchorages, connections, curbs, decking, bearings, shop drawings, calculations, and other incidentals as required.

557.03_forest_02_01_2019

Replace the first paragraph under this subsection with the following:

557.03 General. For required loadings use the most recent AASHTO LRFD Bridge Design Specifications and the design loads shown on the drawings. Submit plans, calculations, and shop drawings, signed by a professional engineer registered in the state where the bridge will be installed or in the state where the fabricator’s offices are located, at least 14 days in advance of the start of fabrication to allow time for review and correction of any changes and approval by the CO.

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

Use durable materials to allow removal, transportation, and re-installation without using specialized construction equipment. Use design techniques and fabrication methods to minimize field installation difficulties.

Perform excavation, backfill, and embankment work under Sections 208- Structural Excavation, riprap placement under 251 Riprap, and base course and surface course aggregate placement under 301 Aggregate Courses.

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

Notify the CO at least 7 days before delivering the bridge materials to the project site.

557.21_forest_02_01_2019

Replace this subsection in its entirety with the following:

557.21 Measure the Section 557 items listed in the bid schedule according to Subsection 109.02.