Van_Buren-FSSS.docx

FOREST SERVICE

SUPPLEMENTAL SPECIFICATIONS

FOR

VAN BUREN CREEK

CULVERT REPLACEMENT

ROAD NO. 2002 – M.P. 5.98

U.S.D.A Forest Service, Region 1 Nez Perce-Clearwater National Forests Salmon River Ranger District Idaho County, Idaho

Prepared by:

GREAT WEST ENGINEERING

2501 Belt View Drive Helena, MT 59604

VAN BUREN CREEK CULVERT REPLACEMENT

Road No. 2002 – M.P. 5.98

FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS

TABLE OF CONTENTS

i

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 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:

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, methods of measurement, 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 the removal of an existing culvert and replacing it with a new 19’-0” span by 6’-4” rise steel structural plate arch culvert on Forest Road No. 2002 milepost 5.98 crossing Van Buren Creek. Improvements consist of but are not limited to: clearing and shaping the roadway to the project site for contractor access, structure excavation, excavation and reshaping of the channel, installation of precast footings, placement of riprap, foundation fill, installation of a structural steel plate arch culvert, structural backfill, excavation and embankment of the roadway approaches, and gravel surfacing.

The project is located in the Salmon River Ranger District of the Nez Perce-Clearwater National Forests, approximately 33 miles northeast of Riggins in Idaho County, Idaho (Section 33, Township 1 north, Range 3 east). Refer to the location map on the title sheet of the plans.

104 – CONTROL OF WORK

104 Control of Work.

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:

Waste Site (Government Furnished Source) – A waste site for excess or unsuitable material is located on the east side of Road No. 2002 at mile post 2.4, which is 3.6 miles southwest of the project site. The CO will designate the specific waste site location. All other materials designated for removal and disposal must be disposed of off National Forest Lands per FSSS Section 203.05.

Crushed Aggregate (Government Furnished Source) – A source for crushed aggregate is available at milepost 29.5 on Road No. 221 or the Van Ridge Pit located on Forest Road 441 at mile post 20.4.

Approved Material Stockpile Site – The Contractor will be allowed to stockpile material, including riprap, crushed aggregate, and culvert components, adjacent to the existing culvert. There is limited space available for stockpiled materials. Additional space for stockpile will be made available at the waste site. Materials must be stockpiled in such a manner as to avoid damage to any trees at the culvert site and must be placed above the ordinary high water mark of the stream. Provide the CO 72 hours advance notification prior to stockpiling any materials at the construction site.

Riprap Source (Commercial Source)

Structural Backfill Source (Commercial Source)

Foundation Fill (Commercial Source)

Native Streambed Material (Government Furnished Source) – The contractor shall use suitable onsite material from channel excavation or structure excavation for channel construction. All material must meet FSSS Section 705.07 and be approved by the CO before placement.

Roadway Embankment (Government Furnished Source) – Use suitable structural excavation for roadway embankment.

Add the following to section (b) Contractor-located sources:

Prior to any pit development or use of materials, the Contractor shall provide to the CO a State certification that the pit site is free of noxious weed as listed on the "All States Noxious Weeds List”.

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:

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 Description

Add the following at the end of the last sentence:

All temporary or portable signs shall be included as a subsidiary item to section 151. Signs and sign placement shall meet the requirements of the “MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES” (MUTCD), published by the U.S. Department of Transportation, Federal Highway Administration. Work on the project shall not be started until all required signs are in place and approved by the C.O.

Removal and replacement of road closure devices such as concrete barriers or earth barriers to gain access to the project shall be included as incidental to Section 151 Mobilization.

Work also includes cleaning all construction equipment prior to entry on to Forest Lands. Remove all dirt, plant parts and material that may carry noxious weed seeds into the area. Only construction equipment inspected by the Forest Service will be allowed to operate within the project area. Treat subsequent move-ins of equipment the same as the initial move-in. Clean truck beds and dump boxes hauling to the project site prior to entering the work area. The Contractor shall give the Forest Service at least 24 hours advance notification when equipment is ready for inspection. The location for inspection shall be as agreed upon in the preconstruction meeting.

152 – CONSTRUCTION SURVEY AND STAKING

152.03 Survey and Staking Requirements.

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 FSSS 105.02(b), FSSS 155

FSSS 157.03

157.09

Certification

Certification

Approval

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 following from the last paragraph:

According to Subsection 106.07(b)

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 keep Road No. 2002 closed at the culvert site to through traffic for the duration of the project. The contractor will be responsible for maintaining the road closure signs during the construction period. The Contractor shall be responsible for providing, installing, maintaining, and removal of type 3 barricades at the project site for the road closure period.

It is the responsibility of the Contractor to schedule delivery of materials, equipment and all necessary supplies to the site, to ensure that the culvert can be substantially completed within the contract time. The Contractor shall give the CO at least three weeks advanced written notice prior to any road closure.

Contractor shall provide and install one ‘road closed ahead’ sign for the duration of the work. The sign shall be located at along NFSR 2002, 4.5 miles from the junction with NSFR 221.

ROAD CLOSED

1.5 MILES AHEAD

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.

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 and dewatering plan proposals at least 14 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.

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 National Forest 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 Embankment Slopes. Place construction slash on completed embankment slopes or scatter as directed by the CO to reduce soil erosion. Place construction slash as flat as practicable on the completed slope. Do not place slash on embankment slopes closer than 2 feet, slope distance, from the road surface. Priority for use of available slash is for: (1) through fills; (2) insides of curves; and (3) ditch relief outlets. No slash may be placed below the bankfull elevation of the stream. All remaining material may be disposed of at the designated waste site or as approved by the CO.

204 – EXCAVATION AND EMBANKMENT

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. Make at least six 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 at designated sites or as directed by the CO.

204.15 Acceptance.

Delete reference to Table 204-1.

208 – STRUCTURE EXCAVATION AND BACKFILL FOR SELECTED MAJOR STRUCTURES

208.04 General.

Add the following:

Submit four sets of the excavation plan to the CO for approval a minimum of 21 days before the start of construction.

Use all suitable material from structure excavation in the construction of the roadway embankment outside the limits of structural backfill. Field drain and dry excessively wet material that is otherwise suitable for embankment before placement. Place and shape unsuitable or excess material in the designated sites or as directed by the CO.

208.08 Dewatering.

Delete the subsection and add the following:

Submit a dewatering plan according to Section 157.03.

Construct diversion prior to performing any excavation and according to Sections 157.08 and 157.09. Construct diversions using water tight, non-eroding methods. Employ settling basins or other methods so that muddy water is not returned to stream. Install, operate, and remove diversions in a manner that minimizes erosion and sedimentation.

208.10 Backfill.

Add the following:

Submit four sets of the backfill and compaction plan to the CO for approval a minimum of 21 days before the start of backfilling operations.

208.11 Compacting.

Add the following:

ALL foundation fill and structural backfill material shall be tested per FP-03 208 (AASHTO T99, Method C). Compact material placed in all layers to at least 95 percent of the maximum density.

208.13 Measurement.

Delete Subsection 208.13 and replace it with the following:

Measure the Section 208 items listed in the bid schedule according to Subsection 109.02 and the following:

Measure structural excavation by the cubic yard to the neat lines shown on the plans or the contractor’s approved proposed excavation plan. Do not include the following volumes in structure excavation:

1. Material excavated outside of the neat lines shown in the plans or approved in the contractors excavation plan;

1. Any material included within the staked limits of the excavation, such as continuous channel changes and ditches, for which measurement is covered under other sections;

1. Water or other liquid material;

1. Material excavated before measurements of the original ground; or

1. Material rehandled, except when the contract specifically requires excavation after embankment placement.

Measure foundation fill and structural backfill by the cubic yard in place for the volume placed to the neat lines and grades shown on the plans or the contractor’s approved excavation plan.

Measure seal concrete under Section 552.

Table 208-1.

Delete Table 208-1 and add the following:

Table 208-1 Sampling and Testing Requirements

Before placing next layer Before using in work

Before placing next layer

(1) Minimum of 5 points per proctor.

Yes, when requester

In-Place Source of Material

In-Place

1/lift/footing 1 per soil type

1/lift/500SF

AASHTO T27 & T11

AASHTO T99, method C (1)

AASHTO T310 or other approved procedures

AASHTO T27 & T11

AASHTO T89

AASHTO T99, method C (1)

AASHTO T310 or other approved procedures

Gradation

Moisture-density

Compaction Gradation

Liquid Limit

Moisture-density

Compaction

(106.04) Measured and tested for conformance (106.04)

(704.01) Structural Backfill (704.04)

251 – RIPRAP

251.01 Description.

Delete the first sentence and add the following:

This work consists of furnishing and placing riprap for bank protection, slope protection, drainage structures, and erosion control.

251.07 Acceptance.

Delete the fourth sentence and add the following:

Structure excavation and backfill will be evaluated under section 208.

251.09 Payment.

The cost of excavation, embankment, and haul required for placement of riprap is incidental to the riprap pay item.

308 – MINOR CRUSHED AGGREGATE

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

Description

308.01 This work shall consist of hauling, placing, finishing, and compacting roadway aggregate.

Material

308.02 Conform to the following Subsections:

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 six 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 ±3 inches.

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.

553A – PRECAST CONCRETE STRUCTURES

Description

553A.01 Work. Construct precast concrete members. In addition, manufacture, test materials for, transport, store, and install all precast concrete portions except piling, and perform all necessary grouting, welding, or other connections. Furnish precast concrete members complete and in place, including all concrete reinforcing steel and incidentals connected therewith.

Materials

553A.02 Requirements. Provide materials that meet the requirements specified in the following subsections:

Provide precast concrete members of the size, shape, strength, air content, and finish that are SHOWN ON THE DRAWINGS. Precast concrete members must be manufactured by a plant with one of the following certifications:

· Precast / Prestressed Concrete Institute (PCI)

· Bridge 1, Precast Bridge Products (no prestressed reinforcing).

· Commercial 1, Precast Concrete Products (no prestressed reinforcing).

· National Precast Concrete Association (NPCA)

· Precast

· American Concrete Pipe Association (ACPA)

· QCast

Submit a copy of the transmittal letter of the latest PCI or NPCA inspection/certification with the shop drawings.

In lieu of PCI or NPCA certification, Contractor shall retain a professional engineer to provide quality assurance for the work by inspecting and certifying in writing the concrete members are constructed in accordance to the specification and shall include but not limited to:

a) Shop drawing review.

b) Concrete member dimensions.

c) Concrete mix design.

d) Aggregate sources and test results.

e) Steel reinforcing placement.

f) Concrete curing and strength test results.

g) Concrete material certifications.

h) Placement mixing, delivery and sampling.

Certification of the above shall be received by the CO prior to shipment and installation at the job site.

Perform all sampling, testing, and inspection necessary to ensure quality control of the component materials and the concrete. Sample and test for quality control and acceptance testing in accordance with the AASHTO or ASTM test methods prescribed in Section 552.

Maintain adequate records of all inspections and tests. Keep records that indicate the nature and number of observations made, the number and type of deficiencies found, the quantities approved and rejected, and the nature of any corrective action taken.

Construction

553A.03 Performance. Construct precast concrete structural members in accordance with the following sections and subsections, as applicable:

Submit four sets of shop drawings to the CO for approval, including the concrete mix design for each class of concrete proposed for use, a minimum of 21 days before fabrication of the precast member(s).

553A.05 Handling, Transporting, & Erecting. Provide additional reinforcement, as needed, to meet the requirements of handling, transporting, and erecting precast members.

553A.06 Acceptance. Reinforcing steel, anchor devices, elastomeric bearings, and material for concrete and grout will be evaluated under Subsection 106.03. Furnish production certifications for hydraulic cement and reinforcing steel.

Concrete for precast concrete members will be evaluated under Subsections 106.02, 106.03, and 106.04.

Construction of precast concrete members will be evaluated under Subsections 106.02 and 106.04.

Reinforcing steel will be evaluated under Section 554.

Falsework and forms will be evaluated under Section 562.

Measurement 553A.07 Measure the Section 553A items listed in the bid schedule according to Subsection 109.02 and the following as applicable.

Do not measure reinforcing steel, concrete, anchorages, plates, nuts, and other material contained within or attached to the unit for precast concrete structural members.

553A.08 The accepted quantities will be paid at the contract price per unit of measurement for the Section 553A pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

603 – STRUCTURAL PLATE STRUCTURES

603.03 General.

Delete the entire section and replace with the following:

Excavation and backfill will be evaluated under Section 208.

Submit four sets of shop drawings with design calculations to the CO for approval a minimum of 21 days before fabrication.

603.05 Acceptance.

Delete the third sentence and add the following:

Excavation and backfill will be evaluated under Section 208.

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. Excavator shall be shall be reasonably free of leaks and other mechanical deficiencies. Bucket must be equipped with a hydraulic "thumb". Contractor shall supply an excavator of a size capable of performing the excavation needs for the project, i.e. structure excavation, riprap construction, in-stream structures, etc., or other work that may be directed under this section. Submit the model number of the equipment to the CO for approval before delivery to the project site. 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.

Submit the model number of the equipment to the CO for approval before delivery to the project site. Equipment shall be no more than 15 years old and shall be reasonably free of leaks and other mechanical deficiencies.

622.04 & 622.05 Measurement and Payment.

The contractor shall be aware of the following statement within section F of the Contract under FAR 52.211-18 Variation in Estimated Quantities: “Adjustment of contract prices as described in this section shall not apply to section 622…. The government reserves the right to reduce or eliminate entirely the work under this item with no adjustment in the contract unit price.”

625 – TURF ESTABLISHMENT

626.03 Add the following after the last paragraph of the subsection.

Conserved Topsoil and Vegetated Soil Mats. Conserve riparian vegetation, vegetated soil mats, and topsoil from excavation and embankment areas. Stockpile conserved riparian vegetation, vegetated soil mats, and topsoil 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. Place topsoil and vegetated soil mats as directed in the field by the CO.

625.04.

Delete this entire subsection:

625.05.

Delete this entire subsection:

625.06.

Delete this entire subsection:

625.07 Seeding.

Add the following after subsection (b):

Application Methods for Seed:

Apply seed by the Dry Method. The kind of seed to be furnished and the amounts to be applied in terms of pure live seed shall be as follows:

Pounds of seed to be furnished per acre shall be obtained by dividing the pounds of pure live seed (PLS) required per acre by the product of the percent purity & percent germination.

Seed Certification:

Certified, blue-tagged seed shall be used where a named 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.”

625.08.

Delete this section and replace with the following:

No fertilizer will be required.

648 – STREAM SIMULATION

Description

648.01 This work consists of placing onsite native rock and fill to simulate a natural streambed, profile, and cross section though road stream crossings.

Material

648.02 Conform to the following subsections:

Native Streambed 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.

648.04 Channel Excavation and Embankment.

Do not disturb material and vegetation outside the construction limits.

Construct the new stream channel as shown on the plans or as directed by the CO. Do not operate equipment in the live stream. Only excavators with an operating weight less than 50,000 lbs may be used for channel excavation. Minimize disruption of the existing landscape and impacts to the stream. Provide adequate pumping equipment, piping or other acceptable measures, as approved by the CO, to dispose of any water encountered during excavation in a manner that will cause minimal sedimentation to the existing stream.

Scarify earth cuts to 6 inches below subgrade within the channel construction limits. Compact the scarified material according to Subsection 648.06.

Native streambed material shall be used to construct the channel section shown on the Drawings. Channel excavation or structure excavation material may be used. Incorporate only suitable material into embankments.

Dispose of unsuitable or excess excavation material at the waste site designated in Section 105.

Compact the material according to Subsection 648.06.

648.05 Placed Streambed Material

(a) Method A, Machine Placed. Place native streambed material in one or more layers with a layer depth less than 1 ½ times the maximum dimension of the material. Place 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. Fill voids before placing the next lift.

648.06 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.

648.07 Acceptance. Channel excavation and embankment 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.

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.

703 – AGGREGATE

703.06 Crushed Aggregate.

Delete this section and replace with the following:

Crushed aggregate will be from a government furnished material source. The contractor will be responsible for hauling, stockpiling and placing the material.

705 – ROCK

705.02 Riprap Rock.

Add the following:

All riprap material to be used shall be approved by the CO prior to placement.

Delete the following:

Conform to the following:

(a) Apparent specific gravity, AASHTO T 85 2.50 min.

(b) Absorption, AASHTO T 85 4.2% max.

(c) Coarse durability index, AASHTO T 210 50 min.

Add the following:

705.07 Native Streambed Material.

(a) General. Furnish a mixture of native material that consists soil, gravel, cobble, and boulders to simulate a natural streambed. The cobbles and boulders should be hard, durable rock without open fractures.

Gradation requirements for Native Streambed Material:

If large rock (≤ 20” minus) is encountered during excavation work, place in the stream channel as shown on the plans and per the direction of the CO.

725 – MISCELLANEOUS MATERIAL

Add the following section:

725.40 High-Strength Nonshrink Grout

Furnish grout that is packaged and ready for use with the addition of water at the construction site. Ensure that each bag is stamped to show the last date on which it may be used. Use grout that consists of a hydraulic cementitious system, graded and processed natural fine aggregate, and additional technical components such that the product meets the following conditions:

(d) Free of inorganic accelerators, including chlorides.

(e) Free of oxidizing catalysts.

(f) Free of gas-producing agents.

(g) When mixed to 130 percent flow on flow table (ASTM C 230 at 10 drops), it does not reduce in linear dimension when tested in accordance with ASTM C157. Take measurements at 72 hours and 7 days.

(h) Produces no bleeding for the first 2 hours after mixing when mixed to 130 percent flow on flow table (ASTM C 230 at 10 drops), as tested in accordance with ASTM C232.

(i) Has a minimum strength as follows when tested in accordance with ASTM C 109:

Provide performance characteristics at 115 to 120 percent flow on flow table (ASTM C 230 at 10 drops).

(j) It must be designed, as stated by the manufacturer, to be mixed, placed, and cured at atmospheric temperatures of 5O C to 30O C (40O F to 85O F). Submit products proposed for use for approval by the CO and accompany them with manufacturer’s submittals substantiating all requirements in this subsection, including graphs or charts showing the time, temperature, and humidity requirements for curing to achieve the specified grout strengths; and recommendations for storage, mixing, application, and curing procedures.

As specified as grout on the contract plans, the following products meet the above requirements.

1. MASTERFLOW 928 GROUT, manufactured by Chemrex.

2. CRYSTEX GROUT, manufactured by L&M Construction Chemicals, Inc.

3. CEMENT ALL, manufactured by CTS Cement Manufacturing Co.

4. SURE-GRIP HIGH PERFORMANCE GROUT manufactured by Dayton Superior.

725.41 Mortar

Furnish mortar that is packaged and ready for use with the addition of water at the construction site. Ensure that each bag is stamped to show the latest date on which it may be used. Use mortar that consists of a cementitious system made up of:

(a) Natural aggregate, 3/8” maximum size, that meets the requirements specified in ASTM C 33 except for grading. Accomplish grading by blending sieve sizes to obtain the optimum density.

(b) Metallic aggregate free from nonferrous material, soluble alkaline compounds, and visible rust.

(c) Water reducers, workability agents, air-entraining agents, and catalysts.

Blend the materials to minimize bleeding, increase workability, resist exposure to freeze-thaw cycles and deicing salts, and prevent shrinkage within and at the perimeter of the patch, keyway, or other area to be filled.

Ensure that the minimum compressive strength of the mortar, as tested by ASTM C 109 for a 3” slump, is:

· 24-hour..........................................................................................35MPa (5000 psi)

· 7-day.............................................................................................60 MPa (8500 psi)

· 28-day........................................................................................70 MPa (10,000 psi)

Ensure that the durability of the products when tested at 300 cycles, ASTM C 666, procedure A is:

Submerged in: DF (%)

Water 98

5% CaCl2 solution 95

5% NaCL solution 85

Ensure that the scaling resistance has a rating of 3, Moderate Scaling, after 50 cycles when tested in accordance with ASTM C 672.

Provide certification from the manufacturer that the product is compatible for work that is 1” or more in depth and more than 1” in width; and where the mixing, placing, and curing temperatures may range from 5O C to 30O C (40O F to 85O F).

Submit products proposed for use to the CO for approval, and accompany them with the manufacturer’s submittals substantiating all requirements in this section, including (1) graphs or charts showing the time, temperature, humidity, and curing requirements to achieve mortar strengths equal to the adjacent concrete; and (2) complete recommendations for storage, mixing, application, and curing procedures.

As specified as mortar on the contract plans, the following products meet the above requirements.

1. EMACO T425 or T430, manufactured by Chemrex.

2. RAPID SET DOT REPAIR MIX manufactured by CTS Cement Manufacturing Co.

3. SURE-GRIP HIGH PERFORMANCE GROUT (when extended with pea gravel) manufactured by Dayton Superior.

image2.wmf image1.gif