Attachment_2_Musselshell Tunnel_FSSS_Revised.doc

FOREST SERVICE

SUPPLEMENTAL SPECIFICATIONS

FOR

MUSSELSHELL TUNNEL STREAM REALIGNMENT

ROAD NO. 540 - M.P. 3.65

U.S.D.A Forest Service, Region 1

Nez Perce - Clearwater National Forest

Lochsa Ranger District Clearwater County, Idaho Prepared by:

GREAT WEST ENGINEERING

2501 Belt View Drive

Helena, MT 59601

MUSSELSHELL TUNNEL STREAM REALIGNMENT

(Rd. No. 540 - M.P. 3.65)

FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS

Table of Contents

1Preface

101 - Terms, Format, and Definitions 102 - Bid, Award, and Execution of Contract 103 - Scope of Work 104 - Control of Work 105 - Control of Material 106 - Acceptance of Work 107 - Legal Relations and Responsibility To The Public 108 - Prosecution and Progress 109 - Measurement and Payment 151 - Mobilization 152 – Construction Survey And Staking

153 – CONTRACTOR QUALITY CONTROL

155 – Schedules For Construction Contracts 156 - Public Traffic 157 - Soil Erosion Control 201 - Clearing and Grubbing 203 – Removal of Structures and Obstructions 204 - Excavation and Embankment

308 – MINOR CRUSHED AGGREGATE

622 - Rental Equipment

625 – TURF ESTABLISHMENT

626 – PLANTS, TREES, SHRUBS, VINES, AND GROUNDCOVERS

648 - Stream 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.

Add the following:

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

101.03 Abbreviations.

Add the following to (a) Acronyms:

AFPA

MSHA

NIST

NESC

WCLIB

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

Add the following to (b) SI Symbols:

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.

The project consists of relocating Musselshell Creek adjacent to Forest Service Road No. 540, milepost 3.65. The current channel goes through “Musselshell Tunnel” and 400 linear feet of channel will be realigned around the tunnel. Improvements consist of, but are not limited to; dewatering and rewatering the site, excavating material to shape and regrade the stream channel, installing streambed simulation material, installing instream structures for habitat, installing a new cross drain culvert, revegetating and seeding disturbed areas, realigning and surfacing Road No. 540 for approximately 350 linear feet and excavation and embankment of the roadway.

The project is located in the Lochsa Ranger District of the Clearwater National Forest, approximately 10 miles northeast of Weippe in Clearwater County, Idaho (Section 5, Township 35 North, Range 6 East). Refer to the location map on the title sheet of the plans.

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:

Streambed Simulation Material – Government Furnished – The Contractor shall salvage streambed material onsite or if not enough material exists, from the gravel pit as shown on the cover sheet of the Plans. Streambed material may require sorting and mixing to meet the required gradations specified.

Roadway Embankment – Government Furnished – The Contractor shall use onsite material from roadway excavation or channel excavation for embankment construction. Contractor must get CO approval of material prior to placing.

Channel Rock – Contractor Furnished

Crushed Aggregate – Government Furnished – The Contractor shall use crushed aggregate material from the pit location as shown on the cover sheet of the Plans.

Materials Stockpile Site – Government Furnished – The Contractor will be allowed to stockpile material in the designated stockpile site. Stockpile locations must be flagged by the Contractor and approved by the CO prior to placing material. All disturbed areas shall be reclaimed to existing conditions after removing the material.

Waste Site- Government Furnished – Material will be disposed of at the F.S. Road 540 - M.P. 1.05, 1.25 and 1.65 Pits and as shown on the cover sheet of the Plans. Contractor shall reclaim waste disposal area by shaping material per the direction of the CO. Contractor shall seed all disturbed areas after shaping.

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

All materials and equipment used on this project shall be free of noxious weed as listed on the "All States Noxious Weeds List”. Contractor must submit certified statements that all materials to be used for this project meet Local, State, and Federal weed free certifications.

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.

“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 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.

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

151 - Mobilization

151.01 Description

Add the following requirements:

Noxious Weed Control Requirements:

All construction equipment to be used at the job site shall be cleaned and certified free of noxious weeds and their seeds prior to entrance on to forest lands, whether they are owned, leased or borrowed by the Contractor or any subcontractors. “Construction equipment” does not include personal vehicles or support equipment that remains on the main travel route.

Cleaning shall occur off forest land.

Construction equipment shall be visually inspected by the CO and each one certified in writing to be reasonably clean and weed free. Inspections will take place off of forest lands with the Contractor providing at least 24 hours notice. The location of the inspection site is to be agreed upon in advance between the CO and the Contractor or Subcontractor. Equipment is expected to proceed directly to the job site following the inspection and to not leave the designated weed management district wherein the job site exists.

Certification shall remain valid for each identified piece of equipment for the duration of the specified project and only as long as the equipment remains at the job site or within the designated weed management district. Equipment leaving the designated weed management district will need to be recertified as weed free before being allowed to return to the job site.

Heavy equipment used for this project will be inspected for leaks each day prior to entering the work area. Any leaks or excess oil and grease shall be removed prior to use.

151.03 Payment

Add the following:

Include all costs associated with the cleaning of equipment in the unit price for Mobilization.

152 – Construction Survey And Staking

152.03 Survey and Staking Requirements.

Add the following:

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

153 – CONTRACTOR QUALITY CONTROL

Add the following.

153.07. Project Submittals

At a minimum the contractor shall provide project submittals as shown on the below Submittal Log. Submittal requirements are listed in the Standard Specifications, Supplemental Specifications, and Plans.

Submittal Log

Pay Item(s)

/Drawings Additional Specification References

Certification

Approval

FSSS 622.02

Certification

FSSS 625, 713

155 – Schedules For Construction Contracts 155 Delete

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 and a sign plan per the requirements in section H of the contract, for acceptance at least 30 days before intended use.

Add the following project specific requirements:

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 type 3 barricades required for the road closure period. At the Contractors written request, traffic delays up to one hour will be approved should the project work neccessitate short traffic delays outside the closure period.

Contractor shall provide and install two ‘road closed ahead’ signs on each end of the project for the duration of work. One sign will be located at the beginning of F.S. Road 540 (M.P. 0.0) and shall read Road Closed- 3.5 Miles Ahead. The other sign will be located at F.S. Road 540 (M.P. 3.7) at the bridge crossing Musselshell Creek and shall read Road Closed – 0.1 Miles Ahead.

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

…according to Subsection 106.07(b)

156.08 Traffic and Safety Supervisor.

Delete this subsection in its entirety.

156.10 Measurement and payment.

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

Do not measure Public Traffic for payment. Compensation for this item shall be incidental to Mobilization.

157 - Soil Erosion Control

157.02 Materials.

Add the following:

Provide bales, wattles, logs, in-stream sediment trapping devices, and rolls from a certified noxious weed free source.

In-stream Sediment Trapping Devices

713.19

157.03 General.

Delete the first two paragraphs and replace with the following:

Submit an Erosion Control Plan detailing permanent and temporary control measures to minimize erosion and sedimentation during and after construction in accordance with the plans and storm water permits. Do not modify the type, size, or location of any control without approval. Submit the erosion control plan proposal at least 7 days before operations begin to the CO for approval.

Reflect in the Erosion 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, provide a detailed dewatering plan.

(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.

Add the following to the third paragraph:

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

157.11 Temporary Turf Establishment.

Delete this section and add the following:

Apply seed for soil erosion protection at the rate and type specified in Section 625. Protect and care for seeded areas, including watering, until permanent turf establishment is in place.

201 - Clearing and Grubbing

201.03 General.

Delete the last sentence:

201.04 Clearing.

Add the following:

Utilization standards for merchantable timber are listed below. Fall and buck merchantable material into lengths not to exceed 40 feet. Pieces (logs) meet utilization standards when such pieces would have met Utilization Standards if bucking lengths were varied to include such material.

Minimum Utilization Standards

Delete subsection (d) and add the following:

(d) Limb all logs. Remove brush and soil from log decks. Deck logs so that logs are piled parallel to one another, can be removed by standard log loading equipment, will not damage standing trees, will not interfere with drainage, and will not roll. Keep logs in log decks free of brush and soil.

(e) Within the construction limits shown on the plans, trim tree branches that extend over the road surface and shoulders to attain a clear height of 20 feet. Trim tree limbs as near flush with the trunk as practicable.

(f) Clear only the minimum amount of vegetation required to complete the project.

201.06 Disposal.

Delete this subsection and substitute the following:

Dispose of clearing and grubbing debris according to the following methods:

Method A: Slash Filter Windrow. Construction slash shall be left in a windrow at the location as shown in the Construction Plans or as designated by the CO. Slash windrows shall consist of small, dense vegetative material and be free of stumps and merchantable timber. Slash windrows shall not interfere with culvert drainage. Slash windrows shall construction as shown in the Construction Plans.

Method B: Waste. Construction slash in excess of that needed to build slash filter windrows and not meeting merchantable timber guidelines shall be hauled to the waste areas as shown in the cover sheet on the Construction Plans.

Method C: Decking Merchantable Timber. All merchantable timber within the clearing limits on Forest Service land is Government property. Deck all merchantable timber at approved locations according to 201.06.

203 – Removal of Structures and Obstructions

203.01 Delete and replace with the following:

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

203.05 Disposing of Material.

Modify this subsection as follows:

(a) Remove from project. Add the following:

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

(b) Burn. Delete this section.

(c) Bury. Delete this section.

Add the following:

(e) Placing Slash on Completed Work Areas. Place suitable construction slash at the toe of the roadway embankment in slash filter windrow(s) according to Section 201.06, and as shown on the plans, or as directed by the CO. Haul excess slash to the waste disposal areas.

204 - Excavation and Embankment

204.03 Material.

Add the following:

Native Streambed Material

705.07

204.05 Conserved Topsoil.

Add the following:

Conserve topsoil and vegetated soil mats from excavation and embankment areas. Stockpile conserved topsoil and vegetated soil mats in low windrows immediately beyond the rounding limits of cut and embankment slopes or in other approved locations. Separate from other excavated material. Water soils mats as necessary to ensure transplant success.

204.07 Subexcavation.

Add the following subsection:

204.07A Excavation For Stream Modification.

Do not disturb material and vegetation outside the construction limits. Do not operate equipment in the live stream unless given approval by the CO.

Construct the new stream channel as shown on the plans or as directed by the CO. Contractor shall excavate excess material to construct the channel to the lines and grades shown on the plans. Contractor shall salvage native streambed material during excavation operations to be used to shape the new channel. Place native stream material in one or more layers with a layer depth less than 1 ½ times the maximum dimension of the streambed simulation rock. Place native stream material by methods that do not cause segregation or damage to the prepared surface. Place or rearrange individual rocks by mechanical methods to obtain a compact, low permeability mass matching the natural stream configuration.

204.11 Compaction.

Delete and replace with the following:

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

Channel Compaction. Compact the material using mechanical and/or hand labor methods to form a well-graded, low permeability mass, similar in appearance and texture to the natural streambed.

204.14 Disposal of Unsuitable or Excess Material.

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

Dispose of unsuitable or excess material at designated sites or as directed by the CO. Sites will need to be graded and prepared after placing material. Shape material and seed the site after all material has been placed. Contractor shall maintain haul road during hauling activities and perform final maintenance once hauling is complete.

308 – MINOR CRUSHED AGGREGATE

Delete section 308 in its entirety and replace with the following:

Description

308.01 This work consists of placing Government furnished roadway aggregate.

Material

308.02 Conform to the following Subsections:

Crushed aggregate

703.06

Water

725.01

Construction Requirements

308.03 Preparing Surface. Prepare the roadway surface on which aggregate course is placed as shown on the plans.

308.04 Placing Crushed Aggregate.

(a) Roadway aggregate. Mix the aggregate and adjust the moisture content to obtain a uniform mixture with a moisture content suitable for compaction. Watering, if needed for suitable moisture content, is incidental to this Item. Spread and shape the mixture on the prepared surface in a uniform layer.

Do not place the mixture in a layer exceeding 6 inches in compacted thickness. When more than one layer is necessary, compact each layer according to Subsection 308.05(a) before placing the next layer.

308.05 Compacting and Finishing Crushed Aggregate.

(a) Roadway aggregate.

Compact the aggregate by operating compaction equipment over the total width until visible deformation ceases. A minimum of three complete roller passes shall be made at a moisture content suitable for compaction. Watering, if needed for suitable moisture content, is incidental to this Item.

Blade the surface of each layer during the compaction operations to remove irregularities and produce a smooth, even surface.

Shape the final surface to the required template shown in the drawings. The final road template shall not vary more than ±1 inch.

308.06 Acceptance. Crushed aggregate will be evaluated under Subsections 106.02.

Construction of roadway aggregate courses will be evaluated under Subsections 106.02 and 106.04. Compaction of roadway aggregate courses will be evaluated under Section 106.04.

Preparation of the surfaces on which crushed aggregate is placed will be evaluated under Section 303 as applicable.

Measurement

308.07 Measure the Section 308 items listed in the bid schedule according to Subsection 109.02 and the following as applicable.

Measure crushed aggregate by the cubic yard in the hauling vehicle.

Payment

308.08 The accepted quantities will be paid at the contract price per unit of measurement for the Section 308 pay item listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

622 - Rental Equipment

622.02 Rental Equipment.

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

Hydraulic Excavator. Provide a track mounted hydraulic excavator, 15 years or newer. Bucket must be equipped with a hydraulic "thumb". It is anticipated that an excavator of a size capable of performing the excavation needs for the project, i.e. structure excavation, riprap construction, in-stream structures, etc., will be of an adequate size to be acceptable for any work that the Contractor may be directed to perform under this section. Contractor is required to get approval of the size of the Hydraulic Excavator from the Contracting Officer prior to any work taking place.

Large Dump Truck. Provide a large dump truck with a minimum capacity of 12 cubic yards, 1990 model year or newer. Contractor is required to get approval of the size of the Dump Truck from the Contracting Officer prior to any work taking place.

625 – TURF ESTABLISHMENT

625.03 General.

Add the following.

Cut & Fill slopes damaged by construction activities such as surface blading or additional excavation shall be reseeded.

625.06 Fertilizing.

Delete entire section.

Add the following after subsection (b).

Seed Mix. "Furnish the kinds of seed and the amounts to be applied in terms of pure live seed as follows:

Clearwater Basin General Roadside Seed Mix

Total 22

Apply this mix at a minimum of 22 lb/acre.

Seed Certification

Certified, blue-tagged seed shall be used where a name variety or cultivar is specified. Blue tags that are removed to mix or spread the seed will be saved and provided to the Forest.

All seed purchased will be certified free of seeds from weeds listed on the current "All States Noxious Weeds List."

626 – PLANTS, TREES, SHRUBS, VINES, AND GROUNDCOVERS

626.05 Protection and Temporary Storage.

Add the following after the last paragraph:

All plants for this project are containerized (with the exception of salvaged plants) and will need water while in temporary storage.

Salvaged shrubs should be re-planted as soon as possible in the summer and can only be stored for 5 days prior to re-planting. Salvaged shrubs must have at least 6 inches of soil over the intact root ball while in storage. Root balls must be kept moist while in storage. The salvaged alders are especially vulnerable to desiccation and will need water daily while in storage. Provide shade for the alder while in storage.

626.06 Excavation for Plant Pits and Beds.

Delete the entire subsection and replace with the following:

Mark planting locations with stakes or flagging. Remove all sod, weeds, roots, and other unsuitable material from the planting site. Excavate plant pits as follows:

(a) Width and depth of excavation.

(1) For one-gallon stock, the pit should be deep enough so that the plant can be covered by backfill to the root crown and leave a watering well (2 inches deep 12 inches in diameter) to provide water catchment for plant maintenance.

(2) For salvaged shrubs excavate a pit with enough width and depth to accommodate fully extended roots – no J rooting. Provide a watering well (3 inches deep and the width of the planting hole) and water with horticultural vitamin B solution at half the manufacturers recommend rate. Water with this solution once a day for the first week after planting.

626.09 Watering.

Delete the first two sentences from the first paragraph.

626.14 Acceptance.

Delete the last two sentences from the last paragraph 648 - Stream Simulation Description

648.01 This work consists of placing rock and fill to simulate a natural streambed, profile, and cross section though road stream crossings. The placement of channel rock for cross-vane structures and placed channel rock is included within this specification.

Material

648.02 Conform to the following Subsections.

Streambed Simulation Material

705.07

Construction Requirements

648.03 General. Place streambed simulation material on a prepared surface to form a well-graded, low permeability mass, similar in appearance and texture to the natural streambed. Do not drive metal track or rubber tired equipment directly on metal or concrete structure surfaces.

648.04 Placed Streambed Simulation Material and Channel Rock.

(a) Method A, Machine Placed. Furnish material according to Subsection 705.07 at the bed class shown in the Plans. Place stream simulation rock in one or more layers with a layer depth less than 1 ½ times the maximum dimension of the stream simulation rock. Place stream simulation by methods that do not cause segregation or damage to the prepared surface. Place or rearrange individual rocks by mechanical methods to obtain a compact low permeability mass matching streambed simulation details.

(b) Method B, Cross-Vane Structure Placement. Furnish rock according to Subsection 705.08 at the size shown in the cross-vane structure details. Place or rearrange individual rocks by mechanical or hand labor methods to obtain a shape matching cross-vane structure details. Fill all voids left during placement of cross-vane structures with streambed simulation material. All cross-vane structure locations must be approved by the CO prior to the excavation or placement of any rock.

(c) Method C, Placed Channel Rock. Furnish rock according to Subsection 705.08 at the size shown in the Plans. Place or rearrange individual rocks by mechanical or hand labor methods. All placed channel rock locations must be approved by the CO prior to the excavation or placement of any rock.

648.05 Compaction.

Compact the material using mechanical and/or hand labor methods to form a well-graded, low permeability mass, similar in appearance and texture to the natural streambed.

648.06 Acceptance. Placing streambed simulation material, cross-vane structures, and channel rock will be evaluated under Subsections 106.02 and 106.04.

Measurement

648.08 Measure the items listed in the bid schedule according to Subsection 109.02.

Payment

648.09 The accepted quantities, measured as provided in Subsection 109.02, will be paid at the contract unit price per unit of measurement for 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.

705 - ROCK

Add the following:

705.07 Streambed Simulation Rock.

(a) General. Utilize a mixture of soil, gravel, cobble, and boulders to simulate a natural streambed. All streambed simulation rock shall be government furnishing and either salvaged on-site or from the gravel pit as shown on the cover map of the plans. Streambed material may require sorting and mixing to meet the required gradations specified. The cobbles and boulders should be hard, durable rock that conforms to test values in 705.02.

Table 705-5 – Gradation requirements for Streambed Simulation Material inches or sieve size

Add the following:

705.08 Channel Rock.

(a) General. Furnish hard, durable rock that consists of intact blocks without open fractures, foliation, or other planes of weakness. Conform to test values in 705.02.

(b) Sized and shapes. Furnish rocks that are generally cubical, tabular, or rectangular in shape, with dimensions as designated in the plans conforming to the following table:

Table 705-6 Gradation requirement for Channel Rock

Rock Size

(Man Rock) Mass

(Pounds) Approximate Cubic Dimension (inches)

ROAD CLOSED

XX MILES AHEAD

ii