Charleston Jarbidge Bridge FSSS.pdf

Forest Service Supplemental Specifications Charleston-Jarbidge Bridge Replacement

Table of Contents Preface 101 - Terms ̧Format ̧and Definitions

101.01 Meaning of Terms

105.02(c) Contractor-located sources

107 - Legal Relations and Responsibility to the Public

107.02 Protection and Restoration of Property and Landscape

151 - Mobilization

151.01 Description

156. - Public Traffic 157 - Soil Erosion and Sediment Control

157.04 General

322 - Minor Aggregate Courses 648 - Stream Simulation 703 - Aggregate

703.05 Subbase, Base, Surface Course, and Screened Aggregate

705 - Rock

705.08 Streambed Simulation Rock

Preface

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted the Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects (FP-14) for the Charleston-Jarbidge Bridge Replacement.

101 - Terms¸ Format¸ and Definitions Add the following paragraph to Subsection 101.01:

101.01 Meaning of Terms.

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

Add the following to Subsection 105.02c:

105.02(c) Contractor-located sources.

All material (e.g., soil, gravel, sand, borrow, aggregate, etc.) transported onto National Forest System land or incorporated into the work shall be weed-free. The Contracting Officer may request written documentation of methods used to determine the weed-free status of any and all materials furnished by the contractor. Contractor-provided expertise and methods to establish weed-free status must be appropriate for the weeds of concern in the local area. The following applies to this contract:

107 - Legal Relations and Responsibility to the Public 107.02_National_11_1_2016

Add the following to Subsection 107.02:

107.02 Protection and Restoration of Property and Landscape.

Contractor shall obtain all required permits. Follow all Local, State, and Federal permit requirements.

151 - Mobilization

151.01 Description

Add the following:

“Work also includes cleaning of all equipment used at the project site. Clean all construction equipment prior to entry on the project site. Remove all dirt, plant parts and material that may carry noxious weed seeds into the area. Only construction equipment inspected by the Forest Service will be allowed to operate within the project area. Treat subsequent move-ins of equipment the same as the initial move-

in. Clean truck beds and dump boxes hauling to the project site prior to entering the work area.156 - Public Traffic

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

156. - Public Traffic Description

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

Material

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

Permanent Traffic Control 633

Temporary Traffic Control 635

Traffic Signing and Marking Material 718

Concrete Barriers and Precast Guardwalls 618

Temporary plastic fence 710.11

Construction Requirements

156.03 General. Accommodate traffic according to MUTCD, approved traffic control plan and this section. Perform work in a manner that ensures safety and convenience of the public. Unless otherwise provided for in Table 156-1, keep existing roads open to all traffic during road improvement work, and maintain them in a condition that will adequately accommodate traffic. Accommodate public traffic on roads adjacent to and within the project until the project is accepted according to Subsection 106.07(b).

Submit traffic control plan at least 30 days prior to intended use. Perform no work that interferes or conflicts with traffic or existing access to the roadway surface until a traffic control plan has been approved.

Post construction signs and traffic control devices in conformance with MUTCD and Forest Service EM 7100-15. All required signs will be in place and approved prior to beginning work on project.

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

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

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

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

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

(d) Relocate temporary traffic control devices as necessary.

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

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

(g) Keep temporary traffic control devices clean.

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

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

156.05 Temporary Closures. Road closures will not be permitted. Contractor shall minimize disturbance to traffic flow to the extent possible. Appropriate barricades and signs will be erected and maintained as shown in the traffic control plan or as otherwise designated.

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

Measurement and Payment

156.07 Do not measure Public Traffic for payment. Payment for contract work is provided indirectly. See Subsection 109.05.

157 - Soil Erosion and Sediment Control

Delete Subsection 157.04 and replace with the following:

157.04 General.

Thirty (30) days prior to the start of construction, submit a written plan according to subsection 104.03 with all necessary permits that provides permanent and temporary erosion control measures to minimize erosion and sedimentation during and after construction. 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 without approval. Submit the erosion control plan proposal at least 14 days before operations begin to the Contracting Officer for approval.

When erosion control measures are not functioning as intended, take corrective action to eliminate or minimize pollutants in storm water discharges from the project.

Reflect in the erosion control plan special concerns and measures necessary to protect resources and government improvements. Include:

1. The construction activities and sequence of implementation relating to specific erosion control measures.

2. The location and type of permanent controls to be implemented during construction.

3. For work in stream channels with running water a detailed dewatering plan.

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

5. Describe what monitoring will take place.

All sediment barriers must remain in place for the duration of the project and be maintained in proper working condition. Material shall be removed from behind barriers prior to their final removal. Upon completion of construction at the site, all temporary erosion control measures, dewatering materials and equipment are to be removed from Government property.

The Contractor shall adhere to the following standard practices:

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

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

c) Maintain the road in a manner that prevents direct entry of surface drainage into the stream.

d) Construct permanent and temporary control features to intercept sediments.

e) Any sanitation facilities established by the Contractor shall be located as designated by the CO.

157.12 Temporary Soil Stabilization

Delete this Subsection.

322 - Minor Aggregate Courses

322.01 This work consists of constructing one or more courses of aggregate on a prepared surface. Work includes producing aggregate by grid rolling, screening, or crushing methods, or placing pit-run or Government-furnished aggregate.

Surface aggregate grading is designated as shown in Table 703-3.

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

Screened aggregate grading is designated as shown in Table 703-16.

Material

322.02 Conform to the following Subsections:

Aggregate 703.05

Water 725.01

Construction Requirements

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

Submit target values within the gradation ranges shown in Table 703-2 or 703-3 for the required grading.

After reviewing the proposed target values the CO will determine the final values for the gradation and notify the Contractor in writing.

No quality requirements or gradation other than maximum size will be required for pit run and 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.

Establish stockpile sites at approved locations.

322.04 Mixing and Spreading. Mix the aggregate and adjust the moisture content to obtain a uniform mixture with a moisture content suitable for the specified compaction method. Spread and shape the mixture on the prepared surface in a uniform layer with no segregation of size, and to a loose depth that will provide the required compacted thickness.

Do not place in layers exceeding 6 inches in compacted thickness for aggregate base and surface courses or twice the maximum particle size for screened aggregate. When more than one layer is necessary, compact each layer according to Subsection 322.05 before placing the next layer. Route hauling and leveling equipment uniformly over the full width.

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

322.05 Compacting. Compact each layer full width. Roll from the sides to the center, parallel to the centerline of the road. Along curbs, headers, walls, and all places not accessible to the roller, compact the material with approved tampers or compactors.

Compact the aggregate using one of the following methods as specified in the schedule of items:

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

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

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

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

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

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

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

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

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

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

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

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

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

(c) Ensure that the compacted width is not consistently above the specified width. The maximum variation from the specified width will not exceed +12 inches at any point.

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

322.07 Maintenance. Maintain the aggregate course to the correct line, grade, and cross-section by blading, watering, rolling, or any combination thereof until placement of the next course. Correct all defects according to Subsection 322.06.

322.08 Acceptance.

Aggregate gradation and surface course plasticity index will be evaluated under Subsection 106.04. If the aggregate is obtained from a Government stockpile then the above characteristics will be evaluated under Subsection 106.02. Other aggregate quality properties will be evaluated under Subsections 106.02 and

106.04. Placement of aggregate courses will be evaluated under Subsections 106.02 and 106.04.

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

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

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

Measurement

322.09 Measure the Section 322 items listed in the bid schedule according to Subsection 109.02 and the following as applicable.

Measure square yard width horizontally to include the top of aggregate width including designed widening.

Measure the square yard length horizontally along the centerline of the roadway.

If the measurement for aggregate is by cubic yard using contract quantities then measure aggregate by the cubic yard in-place once compacted, otherwise measurement for aggregate by the cubic yard is measured by the cubic yard in the hauling vehicle.

Measure thickness perpendicular to the grade of the travelway.

Measure width perpendicular to the centerline.

Payment

322.10 The accepted quantities will be paid at the contract price per unit of measurement for the Section 322 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

648 - Stream Simulation

648.01 This work consists of placing rock and fill to simulate natural stream profile and streambed though culverts and other structures.

Material

648.02 Conform to the following Subsections.

Foundation Fill 704.01 Stream Bed Simulation Rock 705.08

Construction Requirements

648.03 General. Place stream simulation rock 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. Minimize the amount of fines in the top layer and place as directed by the CO to create a random arrangement of rocks on the surface with a defined low flow channel. Fill in the existing outlet pool with stream simulation material and blend in both the constructed inlet and outlet streambed to tie smoothly into the existing streambed above and below the structure.

648.04 Placed Stream Bed Simulation Rock.

(a) Method A, Machine Placed. 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 bedrock 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 stream simulation bed details. Fill voids before placing the next lift. Place fish rest stop rock as designated.

(b) Method B, End Dumped. Dump 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. Distribute larger rocks throughout the mass of stone. Obtain a uniformly dense, compact, low permeability bed with a surface matching stream simulation bed details. Fill voids before placing the next lift. Place fish rest stop rock as designated.

(c) Method C, Hand Placed. Place stream simulation rock using hand labor. Material may be hand-carried or carried in wheelbarrows and end dumped to obtain its full thickness. Compact each load using hand operated equipment or hand operated mechanical equipment to obtain a uniformly dense, compact, low permeability bed with a surface matching stream simulation bed details. Fill voids before placing the next lift. Fill all voids left during placement of Stream Bed Simulation Rock 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 surface and subsurface voids between the structure and Rocks and between individual Rocks.

Once a minimum depth of 6” is hand placed throughout the culvert, the contractor may use mechanized equipment that will not damage culvert to place the remainder of the material. Equipment to be approved by the CO prior to placement.

648.05 Acceptance. Placing stream simulation material will be evaluated under Subsections 106.02 and 106.04.

Measurement

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

Payment

648.07 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 703.05_National_1_23_2020

Delete 703.05 and replace with the following:

703.05 Subbase, Base, Surface Course, and Screened Aggregate.

(a) Subbase or base aggregate. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming the following:

(1) Gradation Table 703-2

(2) Liquid limit, AASHTO T 89 25 max.

(3) Plastic limit, AASHTO T 90 Nonplastic

(4) Los Angeles abrasion, AASHTO T 96 40% max.

(5) Sodium sulfate soundness loss (5 cycles), 12% max.

AASHTO T 104

(6) Durability index (coarse), AASHTO T 210 35 min.

(7) Durability index (fine), AASHTO T 210 35 min.

(8) Fractured faces, ASTM D 5821 50% min.

(9) Free from organic matter and lumps or balls of clay

Do not use material that breaks up when alternately frozen and thawed or wetted and dried.

Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, shall consist of natural or crushed sand and fine mineral particles.

(b) Surface course aggregate. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming the following:

(1) Gradation Table 703-3

(2) Liquid limit, AASHTO T 89 35 max.

(3) Plastic Index, AASHTO T 90

a) If the percent passing the No. 200 sieve is less than 12% 2 to 9

b) If the percent passing the No. 200 sieve is greater than 12% Less than 2

(4) Los Angeles abrasion, AASHTO T 96 40% max.

(5) Sodium sulfate soundness loss (5 cycles), 12% max.

AASHTO T 104

(6) Durability index (coarse), AASHTO T 210 35 min.

(7) Durability index (fine), AASHTO T 210 35 min.

(8) Fractured faces, ASTM D 5821 75% min.

(9) Free from organic matter and lumps or balls of clay

Or use NDOT or county approved aggregate road base. Do not use material that breaks up when alternately frozen and thawed or wetted and dried.

Do not furnish material that contains asbestos fibers.

Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, shall consist of natural or crushed sand and fine mineral particles.

(c) Screened aggregate – Furnish hard, durable particles or fragments of stone, slag, or gravel conforming the following:

(1) Gradation Table 703-16

(2) Plastic Index, AASHTO T 90 Less than 9

(3) Los Angeles abrasion, AASHTO T 96 55% max.

(4) Free from organic matter and lumps or balls of clay.

Do not use material that breaks up when alternately frozen and thawed or wetted and dried.

Obtain the aggregate gradation by crushing, screening, and blending processes as necessary.

Delete Table 703-2 and replace with the following:

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Delete Table 703-3 and replace with the following:

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Add Table 703-13:

Table 703-13 Gradation Requirements for Screened Aggregate

Sieve Size

Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11)

Grading Designation L M N O P Q R

6 inch 100 100

4 inch 100 100

3 inch 100 100

2 inch 100

No. 4 15-45 15-45 15-45

705 - Rock

Add Subsection 705.08:

705.08 Streambed Simulation Rock.

(a) Simulation Material. Furnish a mixture of soil, gravel, cobble, and boulders to simulate a natural streambed. The cobbles and boulders should be hard, durable rock that conforms to test values in 705.02.

Table 705-4 Gradation requirements for Streambed Simulation Material (inches or sieve size)

Bed Class 100% passing 84% passing 50% passing 16% passing 10% passing 2 5 2 3/4 1/4 No. 10 4 10 4 1 3/4 1/2 No. 10 6 14 6 2 1/2 3/4 No. 10 8 22 8 3 1 No. 10

10 24 10 4 1 No. 10 12 30 12 5 1 1/2 No. 10 14 36 14 6 1 3/4 No. 10 16 42 16 7 2 No. 10 20 48 20 8 3 No. 10 24 60 24 10 3 No. 10

36 72 36 14 4 No. 10

48 96 48 18 6 No. 10

(b) 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.

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.