Supplemental_Specs.pdf

Forest Service Special Specifications

The following Standard and Special Project Specifications are applicable to this contract:

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

156 - Public Traffic

157 - Soil Erosion Control

170 - Develop Water Supply and Watering

201 – Clearing and Grubbing

203 - Removal of Structures and Obstructions

204 - Excavation and Embankment

208 – Structure Excavation and Backfill for Selected Major Structures

251 - Riprap

301- Untreated Aggregate Courses

648—Streambed Simulation

705 - Rock

Preface

Delete all but the first paragraph and add the following:

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

101 - Terms, Format, and Definitions

101.01 Meaning of Terms

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

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:

mp Milepost ppm Part Per Million

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 Bid, Award, and Execution of Contract

Delete Section 102 in its entirety.

103 - Scope of Work

Deletions

Delete all but subsection 103.01 Intent of Contract.

104 - Control of Work

Deletions

Delete Sections 104.01, 104.02, and 104.04.

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 Material Sources

Add the following before the first paragraph.

Sources have been designated for this project as follows:

Riprap Source – Contractor Furnished – There is no available Government source for Riprap for this project. Obtain from approved, weed free commercial source. Appropriate onsite material may be used. If on site material is used by the contractor, it is likely that additional material will have to come from a commercial source to produce the specified material. It is the contractor's responsibility to produce the specified material and to determine the most efficient mixture of government provided material source and commercial source. Sorting and screening may be required.

Streambed Simulation Material – Contractor Furnished – There is no available Government source for streambed simulation for this project. Obtain from approved, weed free commercial source. Appropriate onsite material may be used. If on site material is used by the contractor, it is likely that additional material will have to come from a commercial source to produce the specified material. It is the contractor's responsibility to produce the specified material and to determine the most efficient mixture of government provided material source and commercial source. Sorting and screening may be required.

Channel Rock – Contractor Furnished – There is no available Government source for Riprap for this project. Obtain from approved, weed free commercial source.

Waste Site – Government Furnished – A waste site for excess and unsuitable material is located in AS SHOWN ON DRAWINGS. This site is to be used for the disposal of unsuitable or excess excavated material only. All other materials designated for removal and disposal must be disposed of away from Forest Land per FSSS Section 203.

Unclassified Borrow Material – Government Furnished – Material located within construction limits of project. It is the contractor's responsibility to produce the specified material from onsite material. Sorting, mixing and screening may be required.

Backfill Material - Government Furnished. Material located within construction limits of project. It is the contractor's responsibility to produce the specified material from onsite material. Sorting, mixing and screening may be required.

Materials Stockpile Site – Government Furnished – A stockpile site for material is located in AS

SHOWN ON DRAWINGS.

106 - Acceptance of Work

106.07 Delete

Delete subsection 106.07.

107 - Legal Relations and Responsibility to the Public

107.05 Responsibility for Damage Claims.

Delete the entire subsection.

107.06 Contractor’s Responsibility for Work.

Delete the following from the first paragraph.

“except as provided in Subsection 106.07”.

107.09 Legal Relationship of the Parties.

Delete the entire subsection.

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 Delete.

Delete Section 108 in its entirety.

109 - Measurement and Payment

109 Deletions

Delete the following entire subsections:

109.06 Pricing of Adjustments.

109.07 Eliminated Work.

109.08 Progress Payments.

109.09 Final Payment.

109.02 Measurement Terms and Definitions.

(b) Contract quantity.

Add the following:

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

Change the following:

“(b) Cubic yard” to “(c) Cubic yard”.

Add the following definition:

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

Add the following Subsection:

109.10 Methods of Measurement

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

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

(b) Contract Quantities (CQ). As defined in 109.02 (b) and supplemented above.

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

151 - Mobilization

151.01_0505_us_06_04_2007

151.01 Description

Add the following at the end of the last sentence:

Cleaning of Equipment for Noxious Weeds. To prevent the spread of noxious weeds on National Forest Land, Contractor shall ensure that all equipment moved onto National Forest Land is free of soil, seeds, vegetative matter or other debris that could contain or hold seeds. Contractor shall employ whatever cleaning methods necessary to ensure compliance with the terms of this specification, and shall notify Forest Service prior to moving each piece of equipment onto National Forest land. Notification will include identifying the location of the equipment’s most recent operations. Upon request of the Forest Service, arrangements will be made for the Forest Service to inspect each piece of equipment prior to it being placed into service. If the Engineer determines that noxious weeds are present in a project, cleaning may also be required before moving between work areas within the same project.

Contractor shall certify, in writing, compliance with the terms of this specification prior to each start-up of operations. Measures taken to ensure compliance for equipment present at start-up, and planned to be taken for equipment to be moved in later, will be identified in the certification.

For the purposes of this specification, “equipment” includes all machinery except for log trucks, chip vans, pickup trucks, cars, or other vehicles used to transport personnel on a daily basis.

152 – Construction Survey and Staking

152.01(a) Personnel.

Conduct all construction staking under the direction of a licensed professional engineer or land surveyor who is closely associated and familiar with construction staking.

155 - Schedules for Construction Contracts

Delete Section 155 in its entirety.

156 - Public Traffic

156.03 Accommodating Traffic During Work.

Delete the first paragraph and replace with the following:

Accommodate traffic according to the requirements set forth below, MUTCD, and Section 635.

Submit a traffic control plan for acceptance at least 30 days before intended use.

Add the following project specific requirements:

The Contractor will be allowed to close NFSR 24 between Shirttail Creek and NFSR 26. NFSR 26 and NFSR 26-9 shall remain open to public traffic.

It is the responsibility of the Contractor to schedule delivery of materials, equipment and all necessary supplies to the site, to ensure that the structure can be substantially completed within the specified contract time. The Contractor shall give the CO at least two weeks advanced written notice prior to any road closure. The Contractor shall be responsible for providing, installing, maintaining, and removal of warning signs and barricades required for the road closure period in accordance with MUTCD as submitted and approved in the traffic control plan.

Delete the following from the last sentence of the last paragraph:

according to Subsection 106.07(b)

156.04 Maintaining Roadways During Work

Delete the first paragraph and add the following:

Abate dust on all roads used for hauling construction materials to promote safe use of and to prevent excessive loss of road material.

If water is used for dust abatement, complete abatement once for each hauling day shall satisfy this requirement; except that if hauling exceeds 10 loads per day, water shall be applied to dusting roads continuously while hauling. Other products suitable for dust abatement may be used when authorized by the Contracting Officer.

All water drafting operations necessary for dust abatement on roads shall adhere to FSSS 170.

If other major users are using roads simultaneously with Contractor, Contractor and said users shall agree on a maintenance plan and arrangements for accomplishing the work. This plan shall be submitted by the Contractor and approved by the Contracting Officer. If Contractor cannot agree with other users, the Contracting Officer will determine the appropriate road maintenance needed and direct the Contractor to perform his share of the work.

156.08 Traffic and Safety Supervisor.

Delete this subsection in its entirety.

157 - Soil Erosion Control

157.02 Materials

Add the following:

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

157.03 General.

Delete the entire subsection and replace with the following:

Submit an Erosion and Sediment Control Plan detailing permanent and temporary control measures to minimize erosion and sedimentation during and after construction in accordance with the plans, Section 107, any required storm water permits and any applicable Forest Service BMP’s found in “Water Quality Management for National Forest System Lands in California” (USDA Forest Service, 2011).

The Contractor’s written plan shall include, as a minimum, the Dewatering and Sediment Control requirements as identified in this supplement. The Contractor shall submit the complete plan at least 15 days prior to start of work and shall not commence work until approved in writing by the CO. The plan shall be executed without modification unless authorized in writing by the CO. Do not begin work until the necessary controls for that particular phase of work have been implemented. Do not modify the type, size, or location of any control or practice without approval. When erosion control measures are not functioning as intended, immediately take corrective action. The work shall be in conformance with applicable federal, state and local government water quality regulations. Reflect in the Erosion and Sediment Control Plan special concerns and measures necessary to protect resources and government improvements. Include:

(a) The construction activities and sequence of implementation relating to specific erosion control measures.

(b) The location and type of permanent controls to be implemented during construction.

(c) The location and type of temporary controls to be implemented during construction.

(d) For work in stream channels with running water a detailed dewatering plan per Subsection 157.09.

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

(f) Description of the monitoring plan.

157.04 Controls and Limitation on Work.

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

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

Notify the CO of the intention to dewater the stream at least 72 hours in advance. DO NOT RE- ROUTE STREAM until approved by the CO. A fisheries biologist approved by the CO, and other Government personnel, must be present and prepared to rescue aquatic organisms prior to re-routing of the stream. Work that would jeopardize fish shall not be permitted during the dewatering operation. Dewater the stream slowly and incrementally in order to facilitate the fish rescue. The rescue operation will generally take several hours.

The newly constructed simulated streambed must be approved by the CO prior to releasing water through the project site. After approval, water shall be released slowly and incrementally over a period of at least one hour, or as approved by the CO.

157.08 Water Crossings.

Add the following:

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

157.09 Diversions.

Add the Following:

(a) Stream Bypass Dam and Pipe. Construct a sandbag dam and bypass pipe at the approved location to divert the stream water around the excavation. A channel lined with an impermeable membrane may be substituted for the bypass pipe when approved by the

CO.

(b) Dewatering. Dewatering or diversions are required for construction and adjacent instream work in addition to complete reconstruction of the channel. Dewatering is not required when constructing isolated or infrequent structures such as single rock or log step and other instream structures in channel reconstruction areas outside 25 feet from the inlet or outlet of the structure. Customize dewatering to the site depending on flow, ground water depths at the time of installation, terrain configuration, and culvert embedment depths. Submit a dewatering plan15 days in advance of construction. Include in the plan the method (bypass or pumping), number of pumps and capacity required, pump and bypass culvert calculations, location/layout of dewatering operations and equipment, and erosion control measures for dealing with the return flow back to the existing stream channel. Dewatering design flow is 20 cfs. The plan will be approved by the CO within 14 calendar days of plan submission.

Maintain the dewatering pumping operations to ensure return flow does not exceed State water quality standards. Water pumped from the construction site may require additional filtration by filter fabrics or other methods (settling basins, hay bales, etc) to prevent turbid water from directly entering the stream.

Place additional measures or cease operations until the discharge reaches allowable levels when turbidity exceeds State water quality standards.

Relocate fish contained within the cofferdams before the site is completely dewatered.

Place relocated fish in the closest pool upstream of the construction zone.

Prior to beginning construction work, the footprint of the work in and along the stream will be flagged and the work zone approved by Forest Service. “Fish fences” will be placed, by Contractor and approved by the Forest Service, upstream and downstream of the work zone to prevent fish and frog tadpole entry into the work zone during the construction window. These barriers will be made of fencing or seines of the appropriate mesh to contain fish and tadpoles. These barriers will be maintained during construction by the Contractor. Fish and tadpoles will be rescued as possible from the project zone and moved upstream of the project work. Since such rescue can be imperfect, the need for additional rescue/movement would be pursued as needed, especially during dewatering, or if the “fish fences” are not maintained in a condition that keeps fish and tadpoles out of the work zone.

If trash pumps are used during construction, the intake must be operated and maintained to prevent fish entrapment, entrainment, or injury with the use of perforated or slotted plate and woven wire with a mesh size not greater than 3/32 inch or a profile bar and wedgewire with openings not greater than 1/16 inch. Approach velocities shall not exceed a passive velocity of 0.2 feet per second (fps) or an active velocity 0.4 fps.

(c) Rewatering. Conduct rewatering activities to minimize sediment movement downstream of the site upon completion of instream work. Prior to rerouting stream flow into the new channel, rinse the surface of the streambed to removed fine-grained sediment. After the initial sediment pulse is removed, slowly breach the coffer/diversion dams to avoid a large pulse of water being sent through the newly constructed channel.

157.10 Waterway and Slope Protection and Stabilization

Delete the following: (b) Riprap

157.13 Maintenance and Cleanup.

Maintain all elements of the operation in order to dewater the foundation, facilitate construction, prevent harm to aquatic organisms and prevent sediment and turbidity from entering the stream.

When removing the sandbag dam(s), sand must be removed from the waterway: if course concrete aggregate is used in the sandbags the gravel may be distributed evenly across the waterway as directed by the CO.

Upon completion of construction at the site, remove all temporary erosion control devices, dewatering materials and equipment from Government property.

Bare soil left from filtering or settling operations shall be shaped to drain, seeded and mulched with weed-free straw.

170 - Develop Water Supply and Watering

170.02_0513_us_02_26_2005

170.01 Description. This work consists of developing an acceptable water supply, furnishing, hauling and applying water.

170.02 Materials. Conform to the following subsection.

Water 725.01

170.03 Development of Supply & Access. Develop water supplies and access to the water supplies as required. Use designated water sources or other approved water sources. Before using non-designated water sources, obtain all necessary permissions, water rights, and permits.

Designated water source is Shirttail Creek or Sugar Pine Res. Specific location to be determined by CO prior to start of construction.

Any drafting in streams will be allowed in areas where fish and amphibians have already been removed per FSSS 157.09, or where drafting intakes are screened to minimize entrainment.

Screen mesh size shall be 3/32 inch or smaller mesh for round and square mesh openings and 1/16 inch or smaller for slotted openings. Drafting would be conducted at a rate that does not result in impingement of fish or tadpoles onto the drafting screens; nor visible reduction of stream flow; nor visible reduction of pool volume in downstream pools. Using turbid water generated from construction activities rather than clean surface water from these streams would be preferable, if possible. The drafting sites would be rocked as needed or other erosion control methods would be used to protect downstream water quality for aquatic species.

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

170.05 Application. Apply water uniformly without ponding or washing.

170.07 Measurement. No measurement will be made of this item.

170.08 Payment. No separate payment will be made for the work included under this section.

Payment for this work is considered incidental to other items of work.

201 – Clearing and Grubbing

201.05 Grubbing.

(b) Delete second sentence.

203 - Removal of Structures and Obstructions

203.01 Description.

Delete and replace with the following:

This work consists of disposing of clearing slash and debris; removing, and disposing of buildings, fences, structures, pavements, culverts, utilities, curbs, sidewalks, and other obstructions; and disposing of unsuitable excavated material and other obstructions.

203.05 Disposing of Material.

(a) Remove from project.

Delete the subsection and replace with the following:

Recycle or dispose of material legally off the project site and off Forest Service Lands.

(e) Windrowing Construction Slash. Place construction slash not used for erosion control outside the limits of construction in neat compacted windrows at locations approved by engineer.

Use construction equipment to matt down all material in a windrow to form a compact and uniform pile. Do not place windrows against trees.

(f) Scattering. Scatter pieces of wood less than 3 inches in diameter and 3 feet in length within the clearing limits as instructed by engineer. Scatter slash on bare or disturbed areas within or outside the clearing limits as directed. Limb and scatter other construction slash to reduce slash concentrations. Do not place construction slash in lakes, meadows, streams, or streambeds.

Immediately remove construction slash that interferes with drainage structures.

(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.

(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. Cut logs to lengths less than 20 feet. Ensure that logs stacks are stable and free of brush and soil.

(j) Removal to designated locations. Remove construction slash and/or stumps and excavated material in excess of what is utilized onsite as SHOWN IN DRAWINGS.

(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.

204 - Excavation and Embankment

204.10_0503_us_01_26_2005

204.10 Embankment Construction.

Delete section (b) and replace with the following:

Specific Methods. Place all embankments using one or more of the following methods, as listed in the SCHEDULE OF ITEMS:

(1) Method 1—Side Casting & End Dumping. Place embankment by side casting and end dumping. Build solid embankments by working smaller rocks and fines in with the larger rocks and fines to fill the voids.

(2) Method 2—Layer Placement. Roughen or step surfaces steeper than a ratio of 3 horizontal to 1 vertical (3:1) upon which embankment is to be placed, when shown on plans, in order to provide permanent bonding of new and old materials.

Layer place embankment, except over rock surfaces. Over rock surfaces, place material by end dumping to the minimum depth needed for operation of spreading equipment. Level and smooth each embankment layer before placement of subsequent layers. Operate hauling and spreading equipment uniformly over the full width of each layer.

Place suitable material in layers no more than 12 inches thick, except when the material contains rock more than 9 inches in diameter, in which case layers may be of sufficient thickness to accommodate the material involved. Ensure that no layer exceeds 2 feet before compaction.

Where material containing large amounts of rock is used to construct embankments, make layers of sufficient thickness to accommodate the material involved. 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.

Ensure that material is at a moisture content suitable to obtain a mass that will not visibly deflect under the load of the hauling and spreading equipment. Field drain and dry excessively wet material that is otherwise suitable for embankment before placement.

(3) Method 3—Layer Placement (Roller Compaction). Place embankments as specified in method 2. Place in horizontal layers not exceeding 12 inches prior to compaction, except when the material contains rock more than 9 inches in diameter, in which case layers may be of sufficient thickness to accommodate the material involved. Obtain compaction using equipment listed in Subsection 204.11(a). Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases or, in the case of the sheepsfoot roller, the roller “walks out” of the layer. Make at least three complete passes.

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 AS SHOWN ON DRAWINGS.

208 – Structure Excavation and Backfill for Selected Major Structures

208.02 Material

Delete the following:

Structural Backfill 704.04

Backfill 704.03(a)

251 - Riprap

251.01 Description

Delete the first sentence and add the following:

This work consists of furnishing, hauling, and placing of riprap for stream channel construction, bank protection, slope protection, drainage structures, erosion control, and other features shown on the plans.

251.07 Acceptance

Delete the fourth sentence and add the following:

Structure excavation and backfill will be evaluated under section 208.

- Untreated Aggregate Courses

301.00_nat_us_03_03_2005

301 Title Change.

Change the title to: Section 301 Aggregate Courses

301.01_nat_us_03_03_2005

301.01 Work.

Add the following:

Work includes producing aggregate by pit-run, grid rolling, screening, or crushing methods, or placing Government-furnished aggregate. Work may include additive mineral filler, or binder.

301.02_nat_us_05_16_2005

301.02 Material.

Add the following:

Bentonite 725.30

Calcium Chloride Flake 725.02

Lignon Sulfonate 725.20

Magnesium Chloride Brine or Calcium Chloride Liquid 725.02

301.03_nat_us_09_14_2005

301.03 General.

Add the following:

Written approval of the roadbed is required before placing aggregate.

For pit run or grid-rolled material, furnish material smaller than the maximum size. No gradation other than maximum size will be required for pit-run or grid-rolled material. For grid rolling, use all suitable material that can be reduced to maximum size. After processing on the road, remove all oversize material from the road and dispose of it as directed by the CO.

Provide additives or binder, if required, at the proportions specified.

Develop and use Government furnished sources according to Section 105.

If the aggregate is produced and stockpiled before placement, handle and stockpiled according to Section 320. Establish stockpile sites at locations approved. Clear and grub stockpile sites according to Section 201.

301.04_nat_us_03_03_2005

301.04 Mixing and Spreading.

Delete the first sentence of the first paragraph and add the following:

Ensure that aggregate and any required additives, water, mineral filler, and binder are mixed by the specified method except, if crushed aggregate products are being produced and mineral filler, binder, or additives are required, uniformly blend following crushing. Control additive proportions to 0.5 percent dry weight.

(a) Stationary Plant Method. Mix the aggregate with other required materials in an approved mixer. Add water during the mixing operation in the amount necessary to provide the moisture content for compacting to the specified density. After mixing, transport the aggregate to the jobsite while it contains the proper moisture content, and place it on the roadbed or base course using an aggregate spreader.

(b) Travel Plant Method. After placing the aggregate for each layer with an aggregate spreader or windrow-sizing device, uniformly mix it with other required materials using a traveling mixing plant. During mixing, add water to provide the necessary moisture content for compacting.

(c) Road Mix Method. After placing the aggregate for each layer, mix it with other required materials at the required moisture content until the mixture is uniform throughout. Mix aggregate, water, and all other materials until a uniform distribution is obtained.

Spread the aggregate in a uniform layer, with no segregation of size, and to a loose depth that will provide the required compacted thickness.

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

Route and distribute hauling and leveling equipment over the width and length of each layer.

301.05_nat_us_05_17_2005

301.05 Compacting

Delete and replace with the following:

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:

Compaction A. Operating spreading and hauling equipment over the full width of the travelway.

Compaction B. Operate rollers and compact as specified in Subsection 204.11(a) (1).

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.

Compaction E. Compact to a density of at least 96 percent of the maximum density, as determined by the Modified Marshall Hammer Compaction Method (available upon request from USDA Forest Service, Regional Materials Engineering Center, P.O. Box 7669, Missoula, MT 59807).

Compaction F. Compact to a density of at least 95 per-cent of the maximum density, as determined by AASHTO T 180, method C or D.

Compaction G. Compact to a density of at least 100 percent of the maximum density as determined by the Modified Marshall Hammer Compaction Method (available upon request from USDA Forest Service, Regional Materials Engineering Center, P.O. Box 7669, Missoula, MT 59807).

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_nat_us_03_03_2005

301.06 Surface Tolerance.

Add the following:

Thickness and Width requirements:

The maximum variation from the compacted specified thickness is ½ inch. The compacted thickness is not consistently above or below the specified thickness and the average thickness of 4 random measurements for any ½ mile of road segment is within + ¼ inch of the specified thickness.

The maximum variation from the specified width will not exceed +12 inches at any point. The compacted width is not consistently above the specified width and the average of any four random measurements along any ½ mile of road segment is within +4 inches of the specified width.

301.08_nat_us_02_07_2007

Table 301-1 Field Density Requirements.

Table 301-1: Delete laboratory and field density requirements for base, subbase, and surfacing and replace with the following:

Material or Product

Type of Acceptance (Subsection)

Characteristi c

Category Test Methods Specification s

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Base and Subbase

Measured and tested conformance (Subsection 106.04)

Moisture Density ---

Method C --- AASHTO T 99 1 per type and source of material

Source of material

Yes Before using in work

Method C-1 --- R-1 Marshall “ “ “ “

Method D --- AASHTO T 180 “ “ “ “

Method D-1 --- R-1 Marshall “ “ “ “

Compaction ---

Method C, C-1, D, D-1

--- AASHTO T 310 or other approved procedures

1 per 500 t In-place --- Before placing the next layer

Surfacing Measured and tested conformance (Subsection 106.04)

Moisture Density

Method C-1 --- R-1 Marshall “ “ “ Before using in work

Method D --- AASHTO T 180 “ “ “ “

Method D-1 --- R-1 Marshall “ “ “ “

Compaction

Method C, C-1, D, D-1

--- AASHTO T 310 or other approved procedures

1 per 500 t In-place --- Before placing the next layer

301.08_nat_us_03_30_2005

301.08(b) Plasticity Index.

Add the following to the first sentence:

“and under 703.05(c) (1)”.

301.08_nat_us_03_03_2005

Table 301-1: Add the following:

Table 301-1—Acceptance Sampling and Testing Requirements.

Material or Product

Type of Acceptance (Subsection)

Characteristi c

Category Test Methods Specification s

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Subbase & Base Courses L, M, N, O, P, Q, R

Measured and tested conformance

(Subsection 106.04)

Plastic Limit - AASHTO T 90 1 per each 1,000 T

From the windrow or roadbed after processing

Yes 4 Hours

Table 301-1—Acceptance Sampling and Testing Requirements.

Material or Product

Type of Acceptance (Subsection)

Characteristi c

Category Test Methods Specification s

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Aggregate Width Measured and tested conformance

(Subsection 106.04)

Width - - 4 per each 0.5 mi

Roadbed after processing

- 4 Hours

Aggregate Thickness Measured and tested conformance

(Subsection 106.04)

Thickness - - 4 per each 0.5 mi

Roadbed after processing

- 4 Hours

Additive Measured and tested conformance

(Subsection 106.04)

Amount of Additive - 1 per each 1,000 T

From the windrow or roadbed after processing

No 4 Hours

301.09_nat_us_07_07_2005

301.09 Measurement.

Replace the second paragraph with the following:

Measure aggregate by cubic yard compacted in place when payment is by contract quantities.

301.10_nat_us_03_03_2005

301.10 Payment

Delete the following:

adjusted according to Subsection 106.05

648—Streambed Simulation

648.01 Description

This work consists of furnishing and installing alluvium, rock, logs, trees, rootwads and specified fill to simulate natural stream profile, grade control structures, and streambed through culverts, bridge structures, and existing stream channels. Work includes developing materials; hauling materials; dewatering; sediment control; placing bedding and backfill to construct stream simulation channels inside and outside of the structures (culverts, bridges, existing channels);

placing, keying, sealing, and compacting designed streambed fill; constructing instream structures (steps, pools, riffles, ribs, banks); reconstructing existing channels; and all other streambed work to complete the project.

648.02 Material

Conform to the following Section and Subsections:

Foundation Fill .......................................................................704.01

Streambed Simulation Rock ..................................................705.07

Channel Rock ........................................................................705.08

Furnish instream structures materials (boulders, boulder clusters, ribs, steps, riffles, etc) and stream simulation streambed mix with the sizes and gradations as required in the contract.

Sort material for streambed simulation rock by screening (power screen or grizzly/stationary screen) as shown on the plans. Large particles may be machine sorted by heavy equipment or hand labor.

Mix streambed simulation rock in proportions based on Table 705-4. All streambed material will be similar in shape / angularity as those found in the natural stream channel or as designated in the specifications. Tolerance for material gradation is + or – 5% for each screen size listed in the gradation.

Provide streambed simulation rock and channel rock that is durable and at least as angular as those found in the natural stream channel or as SHOWN ON THE PLANS.

Do not use rounded channel rock in the construction of banks or steps within the culvert or bridge structure. Rounded channel rocks may be used outside the culvert or bridge structure if approved by the CO in the field.

Request approval of rock to be used for steps, banks and all grade control structures 3 days prior to scheduled placement.

Construction Requirements

648.03 General.

Place streambed simulation rock on a prepared surface to form a well-graded, low permeability mass, similar in appearance and form to the natural stream channel or as required in the contract.

648.04 Equipment Operations.

An oil spill containment kit is required on each job site when working in and around the stream.

Composition of the kit is dependent on the job; determine contents of the kit as needed for each job. At a minimum, include tarps and oil-absorbent pads. Provide floating oil boom downstream of the work site.

648.05 Equipment Limitations.

Do not drive metal track or rubber tired equipment directly on metal or concrete structure surfaces. Place a layer of streambed mix material on the structure bottom before operating metal track or rubber tired equipment directly on metal or concrete structure surfaces.

648.06 Excavation. Control excavated material to minimize disturbance to the adjacent channel and banks. Incorporate suitable streambed materials into the project if required gradations are accordance with contract specifications.

Specific culvert installation time restrictions and installation plan requirements are indicated in the contract.

648.07 Rock Removal. Remove bedrock encountered during excavation to the lines and grades required in the contract. Remove rock by either mechanical means with hydraulic impact hammers / rock breakers, by ripping, or blasting.

648.08 Placed Streambed Simulation Material. Begin construction from the downstream end working upstream. Changes to this sequence will be allowed on a case by case basis due to poor stream to culvert alignment, traffic requirements, limited access, and preservation of existing trees reinforcing the banks.

Place streambed simulation rock in one or more layers with a maximum layer depth less than 1 ½ times the average dimension of the B-axis of the streambed simulation rock, but no greater than 2ft. Place streambed simulation rock by methods that do not cause segregation or damage to the prepared surface. Place or rearrange individual rocks to obtain a uniformly dense, compact, low permeability mass, matching streambed simulation details. Fill voids by machine or hand tamping before placing the next lift. Compact streambed materials by mechanical means such as hand or excavator operated vibratory plate compactors or jumping jack type compactor.

Fill all voids left during placement of streambed simulation rock, boulders, steps, ribs, banks and streambed materials adjacent to footings, concrete structures or corrugated pipes with foundation fill. Use water pressure, metal tamping rods, and similar hand operated equipment to force material into all surfaces and subsurface voids between the structure and rocks, and between individual rocks. Ensure the streambed is sealed to limit permeability.

Notify the CO at least 48 hours in advance of the streambed material installation.

648.09 Rock Bedforms (steps, ribs, riffles), Forcing Features (boulders, boulder clusters), and Bank Construction. Construct bedforms and banks as specified in the contract.

Construction will proceed from downstream to upstream. Machine or hand place banks, steps, and ribs and key in place with select key pieces of the required size class, along with smaller materials of varying sizes to fill voids. Construct low flow channel through the center of the channel AS SHOWN ON THE DRAWINGS. Place steps and ribs so the tops are uneven, containing several high and low points to concentrate water during low flows. Place step and rib surfaces so they are higher at the outside edge of the culvert (culvert wall) and slope down to the outside edge of the constructed low flow channel AS SHOWN ON THE PLANS.

Construct steps with footer rocks placed before the top step rocks are installed. Use footer rocks which are the same size class as the top step rocks. Fill all voids with smaller materials as construction progresses to minimize permeability.

Construct banks out of large blocky key pieces of the required size class AS SHOWN ON THE DRAWINGS. Key and lock smaller materials of varying sizes to fill voids. Bank materials will be hand keyed in place and compacted depending on the size of materials used as designated in the field by the CO. Construct bank faces to be uneven, protrude into the channel, and be rough in appearance. Construct the top of the bank to be fairly uniform. Tie back constructed banks and margins at the edge of the structure walls into the existing stream banks at dimensions similar to those found in the reference reach or AS SHOWN ON THE DRAWINGS.

When single rocks are used as roughness elements and habitat diversity, bury to 50% of the diameter or as SHOWN ON THE PLANS. Fill and compact voids around these structures. When constructed as clusters of particles, key pieces within the cluster will be buried 50% of the diameter or as SHOWN ON THE PLANS.

Notify the CO at least 48 hours in advance of the installation of any streambed, bedform, roughness feature, log structure, or bank construction.

Measurement

648.10 Method. Measure the Section 648 items listed in the bid schedule according to Subsection 109.02 and the following as applicable.

Channel construction per linear unit includes furnishing and installing all rock and work associated with simulation streambed construction and includes the installation of rock steps, ribs, pools, banks, riffles, boulders/boulder clusters and miscellaneous rock structures.

Instream structures composed of rock and wood will be measured separately for payment if designated on the schedule of items.

Do not measure dewatering and diversions, they are considered incidental to construction of the structures unless measured separately for payment if designated on the schedule of items.

Work and materials required for stream simulation are considered incidental to installation of the structure unless designated on the schedule of items.

Payment

648.11 Basis. The accepted quantities, measured as provided in Subsection 109.02, will be paid at the contract price per unit of measurement for the Section 648 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

Payment of foundation fill that is described in Subsection 648.13 shall not be paid for separately, but shall be included in the Section 648 pay item for Channel Rock.

705 - Rock

705.07 Streambed Simulation Material. Furnish hard durable rock that is resistant to weathering and water action, free of organic or other unsuitable material, and conforms to the test values in

Table 705-4

Gradation Requirements for Streambed Simulation Material

Particle Size Range (mm) Particle Size Range (in) Percent Volume (%)

Boulder 230‐512 9‐20 in 5

Cobble 50‐230 2‐9 in 45

Gravel 2.4‐50 #8‐2 in 34

Sand/Silt/Clay <2.4 #16‐#8 16

705.08 Streambed Channel Rock. Furnish hard durable rock that is resistant to weathering and water action, free of organic or other unsuitable material, similar in color to those in the area, and at least as angular as that found in the natural stream channel. Do not use shale, rock with shale seams, or other fissile or fissured rock that may break into smaller pieces in the process of handling and placing. Conform to test values in 705.02.

Conform to the following:

Table 705-5

Gradation Requirement for Channel Rock (CR)

Class Mass (Pounds) Approximate Cubic Dimension (inches)

CR - 0 12 - 90 6 - 12

CR - 1 90 - 300 12 - 18

CR - 2 300 - 700 18 - 24

CR - 3 700 - 1350 24 - 30

CR - 4 1350 - 2400 30 - 36

CR - 5 2400 - 3700 36 - 42

CR - 6 3700 - 5500 42 - 48

CR - 7 5500 - 7900 48 - 54

CR - 8 7900 - 10800 54 - 60

Note: Mass / Pounds of channel is based on a sphere of the approximate cubic dimensions composed of granite. Mass will vary with rock type. Inspection should be performed by using the cube root of the A axis * B axis * C axis of each piece.