Tonka_Bridge_Repair_FSSS_Specifications.docx

Table of Contents

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-03 for construction of National Forest System Roads.

101 - Terms, Format, and Definitions 101.00_nat_us_07_25_2005

101.01_nat_us_01_22_2009

101.01 Meaning of Terms

Delete all references to the TAR (Transportation Acquisition Regulations) in the specifications.

101.03_nat_us_06_16_2006

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:

101.04_nat_us_03_29_2007

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.

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.

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 102.00_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_06_16_2006 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_01_18_2007

105.02 Material Sources.

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_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 106.07_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_06_16_2006

107.06 Contractor’s Responsibility for Work.

Delete the following from the first paragraph.

“except as provided in Subsection 106.07”.

107.09_nat_us_06_16_2006

107.09 Legal Relationship of the Parties.

Delete the entire subsection.

107.10_nat_us_06_16_2006

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 the 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_06_16_2006

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”.

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.

157 - Soil Erosion Control 157.09_1005_us_05_16_2005

157.09 Diversions.

Delete the 1st sentence and add the following:

When shown on the drawings construct temporary channels, temporary culverts, or sandbags to divert water around disturbed areas and slopes. Earthen dams are prohibited.

Add the following to the second sentence.

When shown on the drawings , 171 - Weed and Disease Prevention 171.00_1005_us_03_21_2012 Weed Prevention

Description

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

Material

171.02 Conform to the following Subsection:

Water 725.01

Construction Requirements

171.03 General . Notify the CO in writing at least 15 days before moving any construction equipment onto National Forest System lands. Construction equipment includes pickup trucks, shop trucks, and others operating on native soil subgrades and does not include passenger cars, or other vehicles that regularly travel roads 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 2 day opportunity to inspect the washed equipment. The Contractor may certify equipment cleaning if CO inspection is impractical.

171.04 Equipment. Use a high pressure washing system.

For work on National Forest System lands, use a washing system that traps all soil, seeds, and plant material 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 approved facilities.

171.05 Washing. Wash the sides, tops, beds, and undercarriages of all construction equipment. Remove all soil, seeds, plants, plant fragments, dirt, and debris from the construction equipment, including engine air cleaners.

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.

Measurement

171.08 Do not measure weed prevention for payment.

Payment

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

203 - Removal of Structures and Obstructions 203.01_nat_us_02_25_2005

203.01 Description.

Delete and replace with the following:

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

203.05_nat_us_02_18_2005

203.05 Disposing of Material.

Add the following:

(e) Windrowing Construction Slash. Place construction slash outside the roadway in neat, compacted windrows approximately parallel to and along the toeline of embankment slopes. Do not permit the top of the windrows to extend above subgrade. Use construction equipment to matt down all material in a windrow to form a compact and uniform pile. Construct breaks of at least 15 feet at least every 200 feet in a windrow. Do not place windrows against trees. Obtain approval for pioneer roads. A pioneer road may be constructed to provide an area for placement of windrows, provided the excavated material is kept within the clearing limits and does not adversely affect the road construction.

(f) 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.

(g) Chipping or Grinding. Use an approved chipping machine to grind slash and stumps greater than 3 inches in diameter and longer than 3 feet. Deposit chips or ground woody material on embankment slopes or outside the roadway to a loose depth less than 6 inches. Minor amounts of chips or ground woody material may be permitted within the roadway if they are thoroughly mixed with soil and do not form a layer.

(h) Debris Mat. Use tree limbs, tops, cull logs, split stumps, wood chunks, and other debris to form a mat upon which construction equipment is operated. Place stumps upside down and blend stumps into the mat.

(i) Decking Firewood Material. Remove brush from decks. Limb and deck logs that do not meet Utilization Standards according to Subsection 201.04 as directed by the CO. Cut logs to lengths less than 30 feet. Ensure that logs stacks are stable and free of brush and soil.

(j) Removal to designated locations. Remove construction slash to designated locations.

(k) Piling. Pile construction slash in designated areas. Place and construct piles so that if the piles are burned, the burning will not damage remaining trees. Keep piles free of dirt from stumps. Cut unmerchantable logs into lengths of less than 20 feet.

(l) Placing Slash on Embankment Slopes. Place construction slash on completed embankment slopes to reduce soil erosion. Place construction slash as flat as practicable on the completed slope. Do not place slash closer than 2 feet below subgrade. Priority for use of available slash is for: (1) through fills; (2) insides of curves; and (3) ditch relief outlets.

(m) Hydrological Sensitive Placement. Where required use this method in combination with other designated methods to dispose of material to reduce erosion and to aid in re-vegetation:

1. Place windrow segments on contours, wrap in type I geotextile.

2. Place logs as log erosion barriers on contours. Place logs so that 80% of their length is on the ground surface.

3. Scatter slash on bare or disturbed areas within or outside the clearing limits as directed.

4. Scatter chips or ground woody material on bare or disturbed areas within or outside the clearing limits as directed.

Place stumps in swales or on sites to form planting pockets. Place windrow segments on contours, wrap in type I geotextile.

204 - Excavation and Embankment 204.05_nat_us_02_18_2005

204.05 Conserved Topsoil

Delete the entire paragraph.

204.06_1005_us_01_18_2005

204.06 Roadway Excavation.

Add the following:

Road pioneering, slash disposal, and grubbing of stumps may proceed concurrently with excavation. Conduct excavation and placement operations so material to be treated under Section 201 will not be incorporated in the roadway unless specifically included in the slash treatment method.

Remove snow and ice in advance of the work and deposit beyond the roadway limits in a manner that will not waste material or generate sediment. Do not incorporate snow and ice into the embankment. Do not place snow or ice in a manner to cause damage.

During pioneering operations prevent undercutting of final excavation slopes.

204.10_1005_us_01_18_2005 R10 204.10 Embankment Construction.

Add the following:

Obtain written approval before beginning construction of embankments over 6 feet high at subgrade centerline.

(a) General.

Delete the third paragraph and add the following:

Compact embankment side slopes flatter than 1V:1.75H with a tamping type roller or by walking with a dozer. For slopes 1V:1.75H or steeper, compact the slopes using one of the following methods:

Compact slopes as construction of the embankment progresses by layer placement.

Walking embankment side slopes with a dozer.

Overbuild the fill and operating spreading equipment and loaded hauling equipment over the entire surface of embankment and either remove excess material to the final slope line or leave in place at no cost with written permission of CO.

204.11_nat_us_04_11_2005

204.11 Compaction.

Delete the first paragraph and replace it with the following:

For compaction according to method (a), (b), or (c), use AASHTO T 27 to determine the amount of material retained on a Number. 4 sieve. For compaction methods (d) or (e) no sieve test is required.

Add the following compaction methods:

(d) Layer Placement Method (Hauling and Spreading Equipment). Place material by end dumping to the minimum depth needed for operation of spreading equipment. Level and smooth each embankment layer before placing the next layers. Operate hauling and spreading equipment uniformly over the full width of each layer. Construct a solid embankment with adequate compaction by working smaller rock and fines in with the larger rocks to fill the voids, and by operating hauling and spreading equipment uniformly over the full width of each layer as the embankment is constructed.

(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, in when a sheepsfoot roller is used, the roller “walks out” of the layer. Make at least three complete passes.

204.13_nat_us_03_02_2005

204.13 Sloping, Shaping, and Finishing.

Delete section (d) and add the following:

(d) Finishing. For surfaced roads, remove all material larger than 6 inches from the top 6 inches of the roadbed. For all roads, 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. Finish roadbeds to the tolerance class shown in table 204-2.

Ensure that the subgrade for both surfaced and unsurfaced roads is visibly moist during shaping and dressing. Scarify to 6 inches below the bottom of low sections, holes, cracks, or depressions and bring back to grade with suitable material. Maintain proper ditch drainage.

For unsurfaced roads, use one of the following methods to finish the roadbed:

(1) Method A. Remove all material larger than 6 inches from the top 6 inches of the roadbed and replace with suitable material.

(2) Method B. Use a vibratory grid roller or approved equal with a minimum weight of 10 tons. Roll at least 5 full-width passes or until visible displacement ceases.

(3) Method C. For roads designated as Construction Tolerance Class K, L, or M, finish the roadbed by spreading the excavation. Eliminate rock berms.

Add Table 204-2—Construction Tolerances:

Table 204-2 Construction tolerances.

Tolerance Class(a)

Subgrade elevation (ft)

a. Maximum allowable deviation from construction stakes and drawings.

b. Maximum allowable deviation from staked slope measured from slope stakes or hinge points.

c. Unless otherwise shown the centerline alignment and subgrade elevation, as built, have no horizontal curves with a radius of less than 80 feet, and no vertical curves with a curve length of less than 80 feet when the algebraic difference in the grade change is less than 10 percent, or a curve length of less than 100 feet when the algebraic difference of the grade change is greater than or equal to 10 percent. The centerline grade is not to exceed 20 percent in 100 feet of length.

204.14_1005_us_01_18_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.

Add the following:

End haul consists of the direct loading, hauling, and placement of excess or unsuitable excavation including clearing and grubbing debris from within areas shown on drawings to designated disposal location(s). End Haul also includes all work required to prepare designated disposal location(s) prior to placement of end hauled material. Shape and dress slopes of disposed material as shown on drawings or as approved by CO.

204.16_1005_us_05_04_2007

204.16 (b) Unclassified borrow, select borrow, and select topping.

Add the following:

When contract quantities are designated in the schedule as method of measurement estimate the borrow excavation quantity from design data based on prism cubic yard compacted in final position, in the embankment.

The quantity of material hauled will be based on the quantity of borrow excavation shown in the schedule. Measure haul distance between the center of the material source and the center of embanked material. Compute haul by analytical methods as determined by CO.

Haul from non-designated material source requested by the Contractor will be considered haul from Contractor-furnished sources with an adjustment in contract price, in accordance with applicable contract provisions.

Haul distance from a Contractor-furnished source will be measured as the haul distance from the designated material source if the haul distance from the Contractor-furnished material source is greater than the haul distance from the designated source.

Haul distance from a Contractor furnished-sources will be measured as the haul distance from the Contractor-furnished material source if the haul distance from the Contractor-furnished source is less than the haul distance from the designated source.

209 - Structure Excavation and Backfill 209.10_nat_us_10_23_2007

209.10 Backfill.

(a) General.

Add the following:

Replace any pipe that is distorted by more than 5 percent of nominal dimensions, or that is ruptured or broken.

Do not place or backfill pipe that meets any of the following conditions until the excavation and foundation have been approved in writing by the CO:

· Embankment height greater than 6 feet at subgrade centerline.

· Installation in a protected streamcourse.

· Round pipe with a diameter of 48 inches or greater.

· Pipe arches with a span of 50 inches or greater.

· Any box culvert of structure other than pipe culverts.

(b) Pipe culverts.

(1) Pipe culverts with compacted backfill.

Add the following:

Excavate an area on each side of the pipe as needed to effectively achieve compaction requirements. Backfill without damaging or displacing the pipe. Complete backfilling of the trench with suitable material.

209.11_nat_us_02_24_2005

209.11 Compacting.

Delete the subsection and add the following:

Compact backfill using designated compaction method A, B, or C:

Method A. Ensure that backfill density exceeds the density of the surrounding embankment.

Method B. Adjust the moisture content of the backfill material to a moisture content suitable for compaction. Compact each layer using appropriate compaction equipment until visual displacement ceases. For compaction under sections 252, 254, 255, 257, 258 and 262 compact with a vibratory steel wheeled roller with a mass of at least 8 tons.

Method C. Determine optimum moisture content and maximum density according to AASHTO T 99 method C. Adjust the moisture content of the backfill material to a moisture content suitable for compaction. Compact material placed in all layers to at least 95 percent of the maximum density. Determine the in place density and moisture content according to AASHTO T 310 or other approved test procedures.

Table 209-1 Sampling and Testing Requirements Add the following:

(2) Compaction methods (A) and (B) do not require AASHTO T-99 or T-310 test methods for foundation fill.

571 - Prefabricated Bridges 571.01_1005_us_06_08_2007 571 - Prefabricated Bridges 571.00_1005_us_06_07_2007 Description

571.01 This work consists of designing, fabricating, delivering, and installing prefabricated modular bridge superstructures; or transporting and installing Government-furnished prefabricated, modular superstructures and components; or repairing Government-furnished prefabricated, modular superstructures. The work also includes constructing curbs and railings, caps, bearings, and abutments, including excavation and backfill, anchoring bridge superstructures to abutments as required, riprap, and backwalls.

Materials

571.02 Requirements. Furnish materials that meet the requirements specified in the following sections:

Concrete compressive strength; structural steel tensile strength, finish and designation; timber species, grade, and treatment; and other material specifications shall be as required or if not listed in the contract documents, take them from the manufacturer’s drawings, and submit to the CO for approval prior to fabrication.

Provide a System 3 or galvanized protective coating on steel members according to sections 563 and 708.

Provide pressure treated timber that is Douglas Fir or Western Larch. Except for the wearing surface, treat timber according to Section 716.03.

Provide wearing surface timber that is Douglas Fir, Western Hemlock, Alaska Spruce, Alaska Hemlock, or Alaska Yellow Cedar.

Construction Requirements

571.03 General. Fabricate the prefabricated steel bridge in a fabrication plant that is currently certified for Major Steel Bridge (CBR), under the American Institute of Steel Construction (AISC) Quality Certification Program. Fabricate fracture-critical elements in accordance with AASHTO “Guide Specifications for Fracture Critical Non-Redundant Steel Bridge Members.”

571.04 Design Requirements. Design in accordance with AASHTO “Standard Specifications for Highway Bridges” most recent edition. Design for additional load configurations shown in Figure 1.

When design of the structure is required, submit plans and calculations signed by a professional engineer registered in the state where the bridge will initially be located or in the state where the fabricator’s offices are located.

Consider temporary loads due to handling and erection.

Consider Southeast Alaska’s moist climate and high potential for wood decay and steel deterioration.

Use durable materials to allow removal, transportation, and re-installation using typical forest logging or construction equipment. Use design techniques and fabrication methods to minimize field installation difficulties. Fabricate primary components from steel.

Unless components are furnished by the Government, furnish prefabricated, modular bridge superstructure components complete and in place, including deck, and railing when required, to form a bridge superstructure capable of supporting traffic as soon as construction of approaches is complete. Include all incidental materials required to provide a complete structure ready for use.

Rig main superstructure components with permanent lifting devices to facilitate efficient installation and removal of these items using typical forest logging or construction equipment. Place lifting devices so as not to interfere with traffic.

Design continuous spread or sill type footings between points of superstructure bearing. Provide 5 ft depth of suitable excavated material under the footing and do not exceed 5 kips per square foot of footing-soil contact pressure exerted on the base material, other than solid bedrock. Footing material to be pressure treated wood, glulam, or precast concrete. Native log sills are acceptable if allowed in the contract. Place the front edge of the footing three feet (minimum) back from the top edge of the embankment slope on which it bears. Do not locate the riprap bank protection in this three foot setback. Place footings on a 6 inch layer of crushed aggregate which meets the requirements of the State of Alaska, Standard Specifications for Highway Construction 1998, Table 703-2, grading D1. Extend this leveling course 8 inches (minimum) beyond the edge of the footing.

Design backwalls and wingwalls to retain roadway fill material across the full width of the roadway prism at a slope of 1 vertical to 1.5 horizontal. Extend backwalls to the bottom of the footing. Provide pressure treated wood or precast concrete backwalls. Native log backwalls are acceptable if allowed in the contract.

Provide an untreated timber wearing surface for each longitudinal component. Provide wearing surface planks 3 inches to 4 inches in nominal thickness; 12 inches in nominal width. Extend the wearing surface full length and full width from curb to curb. For bridges installed in a permanent location extend the wearing surface over the top of the backwall. Orient the wearing surface planks parallel to the longitudinal axis of the roadway and offset the longitudinal joints of the wearing surface over the longitudinal joint of the two main bridge components. Install at least one plank after connection of the two components to cover the center joint. Do not locate plank attachment hardware within or above the top ¼ inch of the wearing surface plank. Provide plank attachment hardware that does not extend below the bottom of the deck planks.

When a curb only is system is required, top of curb shall be 15 inches above the top of the wearing surface.

If bridge and approach railing are required, design a bridge railing and approach railing system for 50% of AASHTO rail loading (low volume, single lane bridges). Include in the design proper bridge railing, bridge/approach railing transitions, approach railing, and approach railing terminal sections.

The following modular bridge designs (with curb only) are approved for use in Region 10.

If bridge and approach railing are required, the Contractor is responsible for bridge railing and approach railing design for all bridges.

Hamilton Construction Company

www.hamil.com Bridge lengths of 30, 40, 50, 60, 70, and 80 feet have been approved by Region 10, US Forest Service.

Big “R” Manufacturing and Distributing Company

www.bigrmfg.com Bridge lengths of 10, 20, 30, 40, 50, 60, 70, 80, and 90 feet have been approved by Region 10, US Forest Service.

571.05 Design Drawings. When furnishing a prefabricated bridge superstructure, submit design drawings, calculations, or 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, welding and connection details, and general and specific notes regarding design and construction.

When Government-furnished prefabricated bridge superstructure components are specified, material lists, installation information, and manufacturer’s instructions will be furnished by the Government.

571.06 General. Perform excavation, backfill, and embankment work according to sections 204 and 209.

Dispose of all debris resulting from operations according to section 203.

571.07 Performance. Notify the CO at least 14 days before delivering the bridge.

If the prefabricated superstructure is not installed immediately upon delivery to the project site, provide appropriate equipment and labor to unload and stack, support, and store all material at the delivery point. Support and stack all components to prevent damage. Furnish and install blocking to support all components at least 12 inches above the ground.

Furnish all tools, devices, special equipment, and material needed for installation in well-marked watertight containers suitable for long-term, outdoor storage.

571.08 Abutments and Approaches. Construct required caps, bearing, abutments, and backwalls according to Division 500. Construct approaches including excavation and backfill according to sections 204 and 209. Construct riprap according to section 251.

Excavate to a depth of 5 feet below the substructure and backfill with suitable excavated material.

571.09 Contractor-Furnished Prefabricated Bridge Superstructure. Furnish the following items for approval prior to delivery of the bridge component:

(a) Supplier or inspection agency certification of wood species and grade of all timber and a conformance certificate for all sawn and glued laminated members.

(b) Certification by an approved third party inspection agency of wood treatment, listing method of treatment, type of preservative, retention, and penetration. Supplier certification is permitted if each piece is stamped or branded with a legible American Wood Preservers Bureau quality mark.

(c) Certification from the producer of the treated wood that the “Best Management Practices for the Use of Treated Wood in Aquatic and Other Sensitive Environments” published by the Western Wood Preservers Institute were utilized. Conformance to these standards to be certified in writing by a third party inspection or by the presence of the BMP Certification Mark. www.wwpinstitute.org

(d) Certification of structural steel, fasteners, and hardware.

(e) Certification of galvanizing process used.

(f) Steel fabricator certification that steel fabrication and quality control meet the requirements of the AISC Code of Standard Practice; and that all welding meets the requirements of ANSI/AASHTO/AWS D 1.5 Bridge Welding Code.

(g) A complete list of all bridge components, hardware, and fasteners.

(h) Complete instructions and drawings. Provide drawings that are black line, of reproducible quality, on 11 inch x 17 inch media. Furnish the same information in an approved electronic format.

Mark the end of each major component of the bridge superstructure with the same permanent serial number in a location that is clearly visible, both when stacked in storage and erected at the site.

Assemble bridge superstructure prior to delivery to assure proper fit-up of all components. Notify the CO of the assembly 2 weeks before assembly.

571.10 Government-Furnished Prefabricated Bridge Superstructure. For Government-furnished prefabricated bridge units, transport all material from the storage site(s) to the bridge site, and install the superstructure complete and in place, including connection of all girders, diaphragms, railings, panels, transoms, and other elements. Install the substructure complete and in place including suitable material for fill, crushed aggregate bedding, sills, backwall, and riprap.

Upon taking possession of the Government-furnished units at the storage site, assume liability for damage resulting from handling, transporting, or erecting the units in place, until final acceptance of the project.

571.11 Non-pressure Epoxy Grout Anchors. Furnish non-pressure epoxy grout to cement anchor dowels and bolts. At least 15 days prior to use submit for approval manufacture’s test information on the non-pressure epoxy grout proposed for use.

Immediately prior to placing dowels or bolts, clean drill hole of dust and other material. Fill hole halfway with grout. Insert dowels by rotating it though one complete turn while tapping it down. Insert bolts according to manufacture’s instructions. If necessary add more grout to fill the hole.

571.12 Acceptance. Furnish a production certification for timber, including glued-laminated lumber, structural steel, and fabricated steel. Furnish a certification for all wood treatment, fasteners, hardware, galvanizing processes, and non-pressure epoxy grout.

Measurement

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

Payment

571.14 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.

572 - Log Stringer Bridges 572.00_nat_us_05_12_2004 Description

572.01 This work consists of building log bridges, including abutments, piers, and superstructures and associated excavation and backfill.

Materials

572.02 Conform to the following Sections and Subsections:

572.03 Logs. Use designated trees for logs. Use logs used for stringers that are of the correct species and within the dimensional tolerance. Use high quality logs, that are straight, sound, and free of windshake, decay, or excessive twist (spiral grain with a slope of grain relative to the longitudinal axis of the log exceeding 1 in 8). Ensure that knots in the middle half of the stringer length do not significantly affect structural capacity. Obtain approval for all logs to be used in the structure.

572.04 Timber & Lumber. Furnish structural lumber and timber that meets the required species, grades, and dimensions.

572.05 Aggregate. Furnish aggregate for crib abutments, decking, or surfacing.

Construction Requirements

572.06 General. Perform clearing and grubbing according to Section 201. Perform excavation and embankment according to Section 204. Perform structure excavation and backfill according to Section 209.

Handle all logs and timber carefully to prevent damage to the wood.

Dispose of all debris and excess material at approved locations.

Construct abutments and piers as required.

572.07 Performance. Construct bridge superstructures and substructures as required with attention paid to erection, fit-up, and connection. Obtain written approval for all deviations from the plans.

Place timber caps to obtain even and uniform bearing over the tops of supporting posts or piles and with post and pile ends in true alignment. Secure all caps.

Match stringers for size at the bearings and place them in position so that the crown is up. Alternate stringers butt to tip. Locate any knots that may affect the strength of the member in the top portion of the stringer.

Cut stringers to length with a square cut. Cut or hew the bottom surface of the small end of the stringer logs only to the depth necessary to achieve the required bearing area. Block or shim tip ends that are smaller than the largest tip and shim or block as necessary to provide uniform bearing area.

Notch all logs together, including face logs, tie logs, mudsills, and anchor logs and drift pin all connections.

Place geotextile and aggregate to construct a running surface.

Measurement

572.08 Measure the Section 572 items listed in the bid schedule according to Subsection 109.02 and the following:

Measure untreated and treated timber and lumber by the cubic yard of timber and lumber in place in the completed structure. Compute the quantities from nominal cross section dimensions and actual lengths.

572.09 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 572 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

602 - Culverts and Drains 602.03_nat_us_09_06_2005

602.03 General.

Add the following:

Ensure that the final installed alignment of all pipe allows no reverse grades, and does not permit horizontal and vertical alignments to vary from a straight line drawn from center of inlet to center of outlet by more than 2 percent of pipe center length or 1.0 feet, whichever is less.

602.06_nat_us_08_05_2009

602.06 Laying Plastic Pipe.

Delete the second paragraph and substitute the following:

Provide soil-tight bell and spigot joints for plastic pipe culverts.

651 - Development of Pits & Quarries 651.00_1005_us_01_18_2005 Description

651.01 This work consists of clearing, grubbing, stripping topsoil, removing overburden, constructing access roads, conducting restoration activities, and performing other incidental work required for pit or quarry development.

Construction Requirements

651.02 General. Submit a plan of operations according to Section 105. Perform all work in accordance with Sections 105, 201, 203, 204, 205, 625, and 635, landscape preservation requirements, and the approved pit and quarry development plan of operations. Perform the work in accordance with MSHA 30 CFR, part 56.

Confine blasted material and overburden within the designated clearing limits. Unless otherwise approved by CO, retrieve all material which falls outside the designated clearing limits and either incorporate it into the work or stockpile it in designated areas.

Access Roads. Construct or recondition access roads to the pit or quarry as specified in Section 204 and 303, and as SHOWN ON THE DRAWINGS.

651.03 Acceptance. Developing pits and quarries will be evaluated under Subsections 106.02 and 106.04.

Measurement

651.04 Measure the Section 651 items listed in the bid schedule according to Subsection 109.02.

651.05 The accepted quantities will be paid at the contract price per unit of measurement for the Section 651 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

718 - Traffic Signing and Marking Material 718.05_nat_us_08_05_2009

718.05 Aluminum Panels

Delete the third paragraph and replace with the following:

Clean, degrease and properly prepare the panels according to methods recommended by the sheeting manufacturer. Conversion coatings will conform to ASTM B-921 or ASTM B-449.

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