J12-Revised Pisgah Maintenance Specs 5.17.24.pdf

Pisgah Road Maintenance 2024 Attachment 1

Performance Based Contract Specifications for Road Maintenance

DIVISION 100 - GENERAL SPECIFICATIONS

101 – Statement of Work

The Contractor shall provide any and all equipment, labor, materials, tools, supervision, equipment including safety and other incidentals necessary to perform all work for the specified road maintenance activities located within the boundaries of the National Forest’s in North Carolina in accordance with the specification, exhibits and clauses contained or referenced herein.

102 – Location and Description of Work

This project includes road maintenance for the Pisgah Ranger District of Pisgah National Forest.

Roads to receive maintenance operations are shown on the Vicinity Maps and Road Maintenance Activities Schedule attached.

A project location/vicinity map and/or project site map will also be attached with each task order.

District Locations Shown on Scope of Work.

103 – Schedule of Work

Task orders may be placed throughout the contract period. A Road Maintenance Schedule will be delivered to the Contractor after award. The Road Maintenance Schedule, Exhibit ‘B’, specifies the road number, required maintenance activity, general sequence and frequency of performance and other pertinent information or special instructions necessary for planning and executing the work. Adjustments to these schedules may be made in accordance with CHANGES (FAR 52.243-1) PART II-SECTION I.25. Any such adjustments require prior written documentation from the Contracting Officer (CO).

The Contractor shall inform the Contracting Officer's Representative(COR) of his proposed operating schedule on a weekly basis to facilitate timely inspections. Normal grading tme shall be Monday through Friday. Any grading done on the weekend shall be coordinated with and approved by COR. Contractor shall notify of the COR or inspector of location every two (2) days minimum.

The Contractor shall complete all maintenance required for one road before starting another road. Contractor shall inform the COR of each road completed.

If Contractor elects to use more than one motorgrader on the project, the Contractor shall coordinate with the COR/Inspector as to location and time graders are working

105 - Superintendence by the Contractor

At all times during the performance of the contract and until the work is completed and accepted, the Contractor shall directly supervise the work or assign and have on the work site a competent superintendent who is satisfactory to the CO and has authority to act for the Contractor. The superintendent shall be designated in writing to the CO prior to the commencement of work on the first task order.

106 - Equipment Requirements and Transportation

All equipment proposed to be used for performance of the work shall be of the size, type, number and in such condition to properly pursue the requirements of this contract. Grading equipment must be capable of cutting, crowning and shaping operations necessary to meet the requirements of Activity Codes applicable in the technical (performance standards) requirements and Typical Section Drawings. All equipment shall conform to the requirements of Section 240 – Supplemental Specifications.

The Contractor's proposed equipment shall be made available for inspection prior to award of the contract. If at any time during the course of this contract the equipment is deemed unsatisfactory, the CO may order removal and may require a satisfactory replacement, at Contractor's expense. Replacement equipment, if ordered, is to be onsite and working within 48 hours.

Any movement or transportation of equipment to or from work areas required to pursue the work on designated roads, to repair or replace equipment, or for the Contractor's convenience shall be at the Contractor's expense.

107 - Public Safety and Traffic Control

The Contractor shall exercise caution and care while pursuing the work to prevent unnecessary conflict with, or potential hazards to, road users or others within the work area.

The Contractor is to pursue all work on site in accordance with all Federal, State and Local laws governing the transportation and work being performed.

The Contractor will post warning signs on each end of the section of road being worked. Signs are to be of the size, quantity, and colors as required in the current edition of the "Manual on Uniform Traffic Control Devices", (MUTCD). A copy of MUTCD is located at the District Rangers Office and may be made available to the Contractor for in office reference on request. These signs shall be moved as needed to properly delineate and identify the section of the road being maintained. At no time shall these signs be more than two miles from operating equipment and shall be in place only when road equipment or persons are performing operations. All slow moving equipment is to have a reflectorized "slow moving" vehicle emblem properly attached.

All work is to be scheduled so that at the end of a working day, the road is passable for the type of traffic normally using the road. If for any reason traffic hazards (segments of unfinished work which may present a hazard to road users, such as rolls of surface material, berms on the shoulder, etc.) are left in or adjacent to the road after normal working hours, the work is to be properly signed as hazardous and visibly illuminated at night.

108 – Documentation

1. Accomplishment Reports

The Contractor shall maintain records of accomplishments using the Daily Accomplishment Report. These records are to be delivered to the COR on a weekly basis, or other time interval agreed upon by the Contractor and COR, with an invoice for the services rendered that month and shall become the property of the Government. No payment will be made prior to receipt of these records and acceptance of the work performed.

2. Quality Control Plan

The Contractor shall submit to the CO, a Quality Control Plan (QCP) as part of their technical proposal that will detail the methods the Contractor will use to perform self-inspection to ensure the requirements of this contract are performed in accordance with the contract documents. The QCP shall at a minimum record the reference pay item, location, frequency, type of test and resulting outcome. QCPs shall be submitted with the Accomplishment Report and no payment will be made prior to receipt of these records and acceptance of the work performed.

109- Quality Assurance Surveillance Plan

This Quality Assurance Surveillance Plan (QASP) has been developed pursuant to the requirements of the Performance Work Statement (PWS) for this contract. This plan sets forth procedures and guidelines that will be used in evaluating the technical performance of the Contractor.

PURPOSE OF THE QASP

1. The QASP is intended to accomplish the following:

a. Define the roles and responsibilities of participating government officials and the Contractor;

b. Define the types of work to be performed;

c. Describe the evaluation methods that will be employed by the government in assessing the Contractor’s performance;

d. Provide copies of Government quality assurance monitoring forms that will be used by the government in documenting and evaluating the Contractor’s performance;

e. Describe the process of performance documentation

2. The Contractor is responsible for performing inspection services pursuant to the inspection clause and for providing and maintaining the inspection forms approved by the government to perform the Contractor’s inspection services.

ROLES AND RESPONSIBILITIES OF GOVERNMENT OFFICIALS

The following government officials will participate in assessing the quality of the Contractor’s performance. Their roles and responsibilities are described as follows:

1. The COR and Inspector(s) are responsible for monitoring, assessing, recording, and reporting on the technical performance of the Contractor on the schedule of inspections submitted by the contractor and approved by the government. The COR will have primary responsibility for completing “Quality Assurance Monitoring Forms” which will be used to document the inspection and evaluation of the Contractor’s work performance.

2. The CO will have overall responsibility for overseeing the Contractor’s performance. The CO will also be responsible for the day-to-day monitoring of the Contractor’s performance in the areas of contract compliance, contract administration, cost control, and property control; reviewing the COR’s assessment of the Contractor’s performance; and resolving all differences between the COR’s version and the Contractor’s version.

TYPES OF WORK TO BE PERFORMED/SCHEDULE OF INSPECTIONS

This contract calls for the Contractor to perform the following tasks and subtasks and to perform inspections at the completion of the tasks/subtasks as a minimum and or for intermediate inspections as determined at contract award by the COR/CO based upon accepted Contractor’s quality assurance program submitted as part of technical proposal.

1. Blading Aggregate Surfaced Roads

2. Cleaning and Reshaping Ditches

3. Cleaning Culverts and Tail Ditches

4. Spot Surfacing Replacement with crushed aggregate

METHODS OF SURVEILLANCE

1. The government, through its COR, will be monitoring the Contractor’s performance on a periodic basis or upon completion of a Contractor report or task. The government COR will perform periodic independent inspections after the Contractor has performed their inspection. For results of the independent inspections that differ from the results noted by the Contractor on their inspections, the costs thereof for the re-inspection will be assessed against the Contractor. The Contractor shall be required to rework the effort until the performance standard is achieved.

2. Inspections will be performed to the schedule submitted by the Contractor’s

Quality Control Plan and approved by the government. Variances from the schedule must be preapproved by the CO.

QUALITY ASSURANCE FORMS AND REPORT

1. The COR will use one quality assurance monitoring form to document and evaluate the Contractor’s performance under the contract. The form when completed will document the COR’s understanding of what the Contractor was supposed to do, what was actually done, and the impact or consequences of what was done.

2. The COR will judge each event in accordance with the performance standards and performance requirements stated in the Quality/Performance Requirements section in the contract in the performance requirement summary and asses each task or related service in accordance with the following definitions of Contractor’s performance:

• Acceptable — an acceptable level of performance that meets the acceptable quality level or minimum standards of performance; or

• Unacceptable — a level of performance which is not acceptable and which fails to meet the acceptable quality level or minimum standards of performance.

3. The COR must substantiate all tasks which they judge to be indicative of

“unacceptable” performance. Performance at the “acceptable” level is expected and need not be substantiated

4. The Contractor shall furnish to the COR copies of all inspection forms generated witnessing inspections performed. The COR will forward copies of all completed QA monitoring forms to the CO. The Contractor is required to respond in writing to any negative QA monitoring form(s) within 5 working days after receipt of the form(s)

ANALYSIS OF SURVEILLANCE RESULTS

1. The CO will review each QA monitoring form prepared by the COR. When appropriate, the CO may investigate the event further to determine all the facts and circumstances surrounding the event considered in the COR’s opinions outlined on the forms. The CO will immediately discuss every event receiving a substandard rating with the COR and Contractor to assure that corrective action is promptly initiated.

2. At the end of each month, the COR will prepare a written report for the CO summarizing the overall result of their surveillance of the contractor’s performance during the previous month. This report will become part of the formal QA documentation.

The contract service requirements are summarized on the PRS and relate directly to required services. The performance standard briefly describes the minimally acceptable levels of service required for each item. The PRS and Quality Assurance Forms/Reports provide information on the contract requirements, the expected level of Contractor performance and the expected method of Government surveillance. Procedures as set forth in FAR 52.212-4(a) Contract Terms and Conditions – Commercial Items, Inspection/Acceptance, will be used to remedy all deficiencies

110 – QUALITY ASSURANCE MONITORING FORM

Required

Tasks and Subtasks

Period of Surveillance

Method of Surveillance

Evaluation of Contractor’s Performance

Acceptable Unacceptable

Narrative Discussion of Contractor’s Performance

During Survey Period

Blading Aggregate Surfaced Roads:

Surface Condition Cross Section/Drainage Oversized Material Drainage Dips Berm Removal

Clean and Reshape Ditches:

Ditch Section Transitions Lead-off Ditches Silt Traps

Cleaning Culverts and Tail Ditches:

Inlet/Outlets Tail Ditches Silt Traps

Spot Surfacing Replacement, Crushed Aggregate:

Surface Condition Spread Coverage Transitions Aggregate Quality

PREPARED BY: DATE:

120 – PERFORMANCE REQUIREMENTS SUMMARY

Required Tasks and Sub Tasks

Quality

Standard

Max Allowable Degree of Deviation from

Requirement Acceptable Quality

Level (AQL)

Method of Surveillance

Results of Exceeding Deviation Acceptable

Quality Level

(AQL)

Results of Meeting Acceptable Quality

Level

(AQL)

Blading Aggregate Surfaced Roads

Activity Code

Specifications and Drawings

No more than 5% of the length of the road & No more than 250’ per mile.

Review Contractor’s reports Periodic/Random Inspections Final Inspections

Rework at Contractors expense. Accept with Consideration Reduce payment for work not meeting (AQL)

Full payment for work meeting (AQL)

Good performance record

Cleaning and Reshaping Ditches

Activity Code

Specifications and Drawings

No more than 5% of the length of the ditch & No more than 250’ per mile.

Review Contractor’s reports Periodic/Random Inspections Final Inspections

Rework at Contractor’s expense. Accept with Consideration Reduce payment for work not meeting (AQL)

Full payment for work meeting (AQL)

Good performance record

Cleaning Culverts and Tail Ditches

Activity Code

Specifications and Drawings

No more than 5 % of the culvert quantity per road & No more than 1 culvert per mile.

Review Contractor’s reports Periodic/Random Inspections Final Inspections

Rework at Contractor’s expense. Accept with Consideration Reduce payment for work not meeting (AQL)

Full payment for work meeting (AQL)

Good performance record

Surfacing Replacement

Activity Code

Specifications and Drawings

No more than 3% of the material tonnage per road & No more than 1 load per mile.

Review Contractor’s reports Periodic/Random Inspections Final Inspections

Rework at Contractor’s expense. Accept with Consideration Reduce payment for work not meeting (AQL)

Full payment for work meeting (AQL)

Good performance record

DIVISION 200 – TECHNICAL SPECIFICATIONS

210 – Definition of Road Structures

Graphic definitions of road structural terms are shown on drawing (Exhibit D)

220 – Maintenance Activities

All maintenance work of this contract shall be performed in accordance with the requirements of the Activities Schedule and the Maintenance Activities herein specified.

Only those operations indicated by activity codes in the bid schedule and the activities schedule pertain to this contract.

230 – Soil Moisture Conditions

Suitable moisture conditions for surface blading shall be from five (5) to fifteen (15) percent by weight.

Unless authorized by the COR, no surface blading shall be performed while moisture content is outside this range.

If moisture conditions are too dry or wet, the Contractor will not be required to meet the requirements of prosecution of work under section F.

240 – Equipment Specifications and Minimum Requirements

It is considered necessary for equipment to be of the following minimum standards in order to perform the work: A motorgrader(s) shall be diesel powered, tandem drive, 90 to 155 horse power (hp), with a twelve foot hydraulic shift mold board and scarifier, and weighing a minimum of 30,000 lbs. Equipment must be equipped with a USDA Forest Service approved spark arrester capable of preventing expulsion of sparks from the engine and a five pound extinguisher of an approved type that will extinguish oil or gasoline fires.

250 – Aggregate Materials

Aggregate surfacing shall be crushed stone with gradations being obtained by crushing, screening and mixing as necessary. Aggregate shall meet the requirements of NCDOT ABC, NCDOT ABC (M) or NCDOT – #4 [Railroad Ballast Stone]) and shall meet all requirements for gradation, hardness and durability. Certifications for Compliance is required from aggregate suppliers.

Sieve Designation % by Weight Passing

(NCDOT – Grading ABC)

1 ½” 100 1” 75-97 ½” 55-80

No. 4 35-55 No. 10 25-45 No. 40 14-30

No. 200 4-12

Sieve Designation % by Weight Passing

(NCDOT – Grading ABC(M))

1 ½” 100 1” 75-100 ½” 45-79

No. 4 20-40 No. 10 0-25 No. 40 -

No. 200 0-12

Sieve Designation % by Weight Passing

(NCDOT – #4 [Railroad Ballast Stone])

2” 100 1 ½” 90-100 1” 20-55 ½” -

No. 4 0-5

260 - Erosion and Sedimentation Control

If the work of the contract creates potential for soil erosion or silt migration, the Contractor will be responsible to for providing silt fence, straw bales or other suitable containment and will also be required to seed and mulch bare ground areas. Such work includes, but is not limited to culvert cleaning, excess dirt generation from ditch transitions cleaning, and disposal of silt trap material. This work does not include the newly graded ditch line.

270 – Specifications Applicable to Individual Task Orders

The following specifications may be included in individual task orders:

Federal Highway Administration FHWA Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, 2014 U.S. Customary Units. “FP-14”.

Federal Highway Administration FHWA Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, 2024 U.S. Customary Units. “FP-24”.

FP-14 Forest Service Supplemental Specifications FP-24 Forest Service Supplemental Specifications

DIVISION 800 - PERFORMANCE STANDARDS

ACTIVITY CODE: 807 - Equipment Rental

Use 807 for Emergency slides, etc. Also obtain quotes for daily rates and document daily usages.

Services required include furnishing and operating equipment. Examples of the equipment needed:

Rental Equipment with Operator

807.01 – All equipment proposed to be used for performance of the equipment rental work shall be of the following size and type, or equal, as stated. Equipment shall be maintained in such condition necessary to achieve the desired results.

Bulldozer, John Deere 450, or equal

807.02 – Bulldozer shall be 60 net horsepower or greater with manual or hydraulic tilt blade and manual or hydraulic angle blade. Equipment shall meet Occupational Health and Safety Administration (OSHA) and Federal Motor Vehicle Safety Standards (FMVSS) requirements in effect on date of manufacture

Dump Truck

807.03 – Dump truck shall be of a size capable of hauling 5 cubic yards of dirt/rock/debris from a road reconditioning site, and may be single or tandem axle. Equipment shall meet Occupational Health and Safety Administration (OSHA) and Federal Motor Vehicle Safety Standards (FMVSS) requirements in effect on date of manufacture.

Track Excavator, Caterpillar 320 DL, or equal

807.04 – Excavator with fully hydraulic system. The unit shall have the following minimum capabilities:

boom length 18’-7”, arm length 9’-7”, 1.18 yd3, backhoe bucket, 110 kW flywheel horsepower, drawbar pull 46,311 lb. and track width of 800 mm. Equipment shall meet OSHA and FMVSS requirements in effect on date of manufacture.

Compact Excavator, Bobcat 335, or equal

807.05 – Excavator with fully hydraulic system. The unit shall have the following minimum capabilities:

Horsepower 41, Operating weight 9100 lbs., digging force 5200 lbs., minimum digging depth 10 ft.

Equipment shall meet OSHA and FMVSS requirements in effect on date of manufacture.

Road Grader

807.06 – Grading equipment furnished shall have a minimum weight of 20,000 lbs. and a minimum SAE horsepower of 85. The equipment shall be equipped with power functions, a scarifier and a fire extinguisher. A Rollover Protective Structure (ROPS) is required by OSHA if equipment was manufactured on or after July 1, 1969. Equipment shall be provided with a Forest Service-approved spark arrester.

Compaction Roller (Pneumatic-Tire and Vibratory)

807.07 – Provide 10 Ton vibratory roller to obtain the required density. Provide pneumatic-tire rollers weighing a minimum 30 tons (27 metric tons).

For compaction, use AASHTO T 27 to determine the quantity of material retained on a No. 4 (4.75-millimeter) sieve. Compact as follows:

(a) More than 80 percent retained on a No. 4 (4.75-millimeter) sieve. Adjust the moisture content to a level suitable for compaction. Fill the interstices around rock with earth or other fine material as practical. Use compression-type rollers at speeds less than 6 feet (1.8 meters) per second and vibratory rollers at speeds less than 3 feet (1 meter) per second. Compact each layer of material full width with one of the following and until there is no visible evidence of further consolidation:

a. Eight roller passes of a vibratory roller.

b. Roll from the sides to the center, parallel to the centerline of the road. Compact the material along curbs, headers, walls, and places not accessible to a roller with approved tampers or compactors.

Surface Treatment and Water Tender

807.08 – Water tending equipment furnished shall have a minimum capacity of 2000 gals and be capable of watering roads or embankments as needed. Spread surface treatment and begin compaction within 30 minutes of spreading. Use pneumatic-tire rollers until no displacement is observed. Use steel-wheel rollers, either in static or low-amplitude vibratory mode, to achieve final density and eliminate pneumatic-tire roller marks. Do not park or idle rollers on uncompacted material.

Performance Standards

A. Equipment will be weed free before it used on National Forest System lands.

B. Make equipment available for inspection and approval before use. Furnish the equipment as specified in the table below:

Description Major Minor Allowable Defects Required Action Defect Defect Major Minor Major Minor

Weed free equipment

Equipment not weed free

N/A

Equipment rejected until it can be made weed free

Maintenance of Equipment

Equipment not capable of operating at least 90% of the time

Replace defective

Equipment meets all state and federal regulations

Does not meet state and federal regulations

Bring equipment up to state and federal regulations or replace

Equipment leaks

Equipment leaks in sensitive areas or leaks that are large and not typically inherent in the specific equipment

Small leaks inherent in the specific type

Replace equipment and restore affected site as directed by the

Contracting Officer

Place absorbent pads under equipment when not operating.

Equipment will be operated by a fully trained, qualified, and competent operator at all times.

Operator not fully trained, qualified, and competent

Stop equipment operation until a fully trained, qualified, and competent operator is available. Repair any damage done by incompetent operator as directed by the Contracting Officer

Acceptable Quality Levels

Location of Work

Location of work is as specified on roads listed on the Schedule of Work, the district map, design plans or as ordered by the Contracting Officer.

Method of Measure

A. The accepted quantities will be paid at the established daily rate, rounded to the nearest half (1/2) day, that the equipment is in operation.

B. Non-operable equipment or equipment dependent on another piece of non-operable equipment will not be paid for.

C. Days of operation shall be the same as for the Service Provider’s regular work shift, unless otherwise directed in writing by the Contracting Officer.

D. ½ Day of daily rate will be allocated for mobilization of equipment.

Basis of Payment

The accepted quantities will be paid at the contract price per unit of measurement for the Section 807 pay items listed in the Schedule of Items. Payment will be full compensation for the work prescribed in this Section.

ACTIVITY CODE: 811 - BLADING AGGREGATE SURFACED ROADS

Maintenance Requirements

811.00 – Each road designated to be bladed shall receive a sufficient number of motor grader passes to accomplish the following tasks/subtasks:

811.01 - Blading operations are to be done over the entire riding surface in order to remove, all ruts, potholes, corrugations and berms by cutting out or scarifying to the bottom of such defect. All suitable dislodged material and aggregate shall be smoothly redistributed over the entire riding surface to produce the proper cross slope of 3% (3/8” per foot), or crown of 4% to 6%,(1/2” to 3/4” per foot) as specified, so that water cannot collect or pond on the road surface This shall include roadbed shaping to prevent water from running down the length of the road. Road structural terms are illustrated on Typical Section drawings in Section J (Exhibits D & E).

811.02 - Aggregate surfacing which has been worked onto road shoulders by traffic maintenance activities are to be reclaimed and smoothly redistributed over the entire riding surface. Riding surface widths are to be perpetuated as existing. Dips and swales designated to control surface drainage are to be maintained. No undercutting of road surface nor material berms will be allowed on either side of the road. Assure proper road crowns and surface drainage after all operations.

811.03 - Usual amounts of grass, leaf litter or pine straw is to be smoothly spread within the riding surface after sufficient movement to sift out surface aggregate. Where grass, leaf litter or pine straw is excessive, as determined by the COR, this material will be evenly spread along the road shoulder and left to decay. Care shall be taken to insure this material does not interfere with surface drainage nor present a safety hazard. Any such reusable material is to be reclaimed in subsequent bladings and smoothly spread within the riding surface.

811.04 - Blading operations are to be conducted as required to remove loose surface material and accumulated debris from bridge decks and low water structures. Care is to be exercised to not damage any part of the bridge or low water structure. All material shall be smoothly redistributed over the riding surface at the bridge and or low water structure approaches.

811.05 - Loose rocks protruding three inches or more above the graded surface and loose rocks greater than 3 inches in diameter on the graded surface shall be removed from the roadbed by the end of each work day. It is permissible to waste these rocks off the riding surface but away from ditch lines.

811.06 – Suitable material shall be placed over any solidly embedded rock so that no rock is protruding more than 3 inches above the graded roadbed surface. This requirement does not apply if suitable material is no located within 100 feet of the embedded rock.

811.07 – At the conclusion of grading and shaping operations the roadbed shall be smoothed and dressed to produce a uniform grade and cross section and a surface free of hollows, depressions, and projections above the adjacent roadbed surface. No berm or ridge greater than 1” of any material shall be left along either shoulder of the roadbed unless directed by the CO or designated representative.

Drainage Dips

811.08 – All existing drainage dips, swales and other obvious drainage structures within the roadbed, shall be maintained to control surface drainage. All existing drainage dips shall be bladed and shaped to maintain the alignment, dimensions, depth and profile as illustrated on Typical Section drawings in Section J (Exhibit E).

Berm Removal

811.09 - Berm removal shall consist of the removal of berms along the road shoulders which prohibit proper surface drainage. Material shall be removed to produce a proper cross slope of 3%, (3/8”) per foot or crown of 4% - 6%, (1/2” to 3/4”) per foot. Material shall be spread along foreslopes to assure proper road surface drainage. Following this work the traveled way shall be bladed in accordance with Activity 811: Blading Aggregate Surfaced Roads

811.10 – Fallen trees in roadway shall be removed from the travelway by the Contractor before blading.

All down tree, logs, stumps etc., in ditches or on roadbed being bladed shall be removed as part of the road maintenance operations.

Surface Treatment Application (Electrolyte Emulsion)

811.11 – i. Equipment: Equipment required for electrolyte emulsion application includes: tanker or water truck with spray bar, grading equipment (i.e., bulldozer or motorgrader), and roller. Equipment is widely available in most areas, but availability may be limited in remote areas.

ii. Manufacturing/Mixing Process: Electrolyte concentrate must be mixed with water to achieve the desired concentration level prior to application. Dilution ratios of 1 part electrolyte concentrate mixed with 100 to 600 parts water or more are common.

iii. Placement Process: Electrolyte emulsions can be applied by a sprayed-on method or mixed in method, but mixed-in method is most common. Recommended mixing depth for dust suppression and stabilization ranges from 25 to 50 mm (1 to 2 in) and 100 to 200 mm (4 to 8 in), respectively. The moisture content of the soil prior to treatment should be below optimum for compaction so that the soil moisture content will be near optimum once the electrolyte emulsion is added, considering the water provided by the emulsion; if the material is very dry or saturated, processing to achieve moisture content adjustments is recommended prior to treatment. For dust suppression applications, scarifying the surface allows the electrolyte emulsion to penetrate evenly and quickly into the road surface. For soil stabilization applications, the soil is loosened to the desired treatment depth. The electrolyte emulsion is then applied uniformly using a tanker or water truck with a spray bar and mixed with the loose soil. The electrolyte emulsion is often applied in multiple passes to get better overall mixing.

Once mixed, the treated material is grade d and compacted.

iv. Weather Restrictions: Do not apply electrolyte emulsions if is raining or if temperatures are below freezing.

v. Construction Rate: Electrolyte emulsion application rates are in the range of 2,000 to 5,000 m2/day (2,400 to 6,000 yd2/day).

vi. Lane Closure Requirements: The roadway lane should be closed during construction, but can be opened to traffic once construction is complete.

vii. Safety:

a. Hazards: Some electrolyte products are highly acidic in their concentrated form. Proper handling and mixing procedures should be followed when mixing the concentrated liquid with water to create an emulsion.

b. Skid Resistance: Electrolyte emulsion-treated materials form a firm to hard, skid resistant surface.

c. Road Striping Possible?: No.

d. Other Comments: Electrolyte emulsions can typically reduce road dust by 60 to 80 percent.

viii. Environmental Concerns:

a. Source of Raw Materials: Electrolyte emulsions are typically byproducts or intermediate products of various manufacturing processes. Sulfonated D-limonene and sulfonated naphthalene are two of the chemicals that can be primary components of electrolyte emulsions.

b. Delivery and Haul Requirements: Electrolyte concentrate must be hauled to the site from the distributor. Haul distances may be significant for remote sites. Hauling requirements are reduced somewhat by the fact that the product is shipped in concentrated form and can be mixed with water at the site.

c. Potential Short-Term Construction Impacts: Spills or runoff during the emulsion mixing process could have a negative impact on nearby vegetation, water quality, or aquatic species.

d. Potential Long-Term Environmental Impacts:

i. Leachate: None.

ii. Surface runoff: Electrolyte emulsion-treated soil is relatively impermeable, which promotes surface runoff. However, surface runoff water quality generally is not impacted by electrolyte emulsion treatments.

iii. Erosion: Electrolyte emulsions reduce the erodibility of the unbound roadway surface by binding surface particles together.

iv. Water quality: None.

v. Aquatic species: None.

vi. Plant quality: None.

vii. Air quality: None.

viii. Other: None.

ix. Ability to Recycle/Reuse: The treated soil/aggregate can be reused in any manner similar to the untreated material.

e. Other Environmental Considerations: Environmental impacts of electrolyte emulsions may vary between different proprietary products; specific product information should be collected and reviewed prior to product use. Once diluted to normal application rates, electrolyte emulsions are typically nontoxic, nonhazardous, noncorrosive, and generally environmentally friendly.

Products trade names include: Gravelock, BioCat 300, EMC SQUARED, Permi-zyme 11X, Terrazyme, UBIX No. 0010 and others.

Method of Measurement

Measurement shall be made to the nearest tenth of a mile using an odometer calibrated over a measured mile. Measurement will be made along the road center line. Surface Treatment pay item includes:

1. the product;

2. product disbursement;

3. blading and mixing; and

4. associated equipment.

Payment shall be made for all work of this activity, inspected and accepted, in accordance with the following pay item and the bid unit price.

Pay Item Description Pay Unit 811 (01) Blading Aggregate Surfaced Roads Mile

ACTIVITY CODE 831 – CLEANING AND RESHAPING DITCHES

831.00 All ditches shall be maintained in their original location to the shape and grade required to ensure drainage of the roadway. Ditches at culverts shall be cleaned as needed to provide unobstructed drainage away from the roadway to the invert of the pipe. Drainage structures and road appurtenances shall not be damaged during this operation. Handwork required to properly connect ditch flow lines to drainage structure inlets is considered part of this activity.

831.01 - Lead-off ditches shall be cleaned as needed to maintain the grade and width needed to provide unobstructed drainage away from the roadway to their original length or to daylight. Cleaning silt traps that service the roadside ditches or lead-off ditches is included in this work. Restore silt traps to their original dimensions and depth. Material excavated from these ditches is not to be reclaimed onto the roadway. Unsuitable material may be spread on the fill slopes in a manner that will not affect watercourses or the roadway.

831.02 – Transitions to ditch relief culverts shall be made smooth and the transition from normal ditch depth to the invert of the culvert shall occur within a 25’ (+/- 5’) distance of the culvert inlet. Ditch debris shall not be left piled at or around culvert entrances.

831.03 - Unless otherwise directed by the COR, ditches shall be cleaned so that depth of ditch is 1 foot below the shoulder of the road and the slope of the ground from the road shoulder to the bottom of the ditch is 2H:1V. Following this work, the traveled way shall be bladed in accordance with Activity Code 811: Blading Aggregate Surfaced Roads.

831.04 - All suitable material, (having the same character as the road surface), excavated through this activity is to be reclaimed and used within the traveled way. Unsuitable material is to be spread along back slopes or fill slopes to assure road surface drainage and prevent unsuitable material from being pulled onto aggregate surfaces.

Road ditches shall be measured to the nearest tenth (0.1) of a mile as measured by vehicle odometer calibrated over a measured mile. Measurement shall be made for each side of the road.

following pay item and the bid unit price.

831 (01) Clean and Reshape Ditches Mile

ACTIVITY CODE: 834 – CLEANING CULVERTS AND TAIL DITCHES

Cleaning of Culverts

834.00 - All culverts shall be inspected and cleaned as necessary of dirt, silt, muck, rock, logs, brush, debris and vegetative matter to maintain a smooth flow of water.

834.01 – Culvert inlets shall be cleaned to the invert of the pipe so that 100% of the pipe’s end area is open for a distandce equal to one (1) culvert diameter outside the inlet. Constructed drop inlets shall be cleaned to their original dimensions and depth of basin. Handwork required to properly clean drainage structure inlets is considered part of this activity.

834.02 - These culverts shall be cleaned for a distance equal to two (2) culvert diameters into each end of the pipe.

834.03 - Drainage basins for these culverts shall be cleared of brush and other woody debris for a three

(3) foot radius at the inlet and outlet.

834.04 - Culverts that are more than 1/2 silted in throughout its length shall be brought to the attention of the COR and shall be exempt from normal cleaning operations. Throughout this operation, care shall be taken to prevent damage to culvert pipes, end sections and all other appurtenances.

834.05 - All material, including brush, extracted in this operation shall be disposed of at the site outside the roadway and away from natural or man-made drainages.

Tail Ditches

834.06 - Tail ditches at culverts shall be cleaned as needed to maintain the same grade (+ 2%) and width as the pipe and to provide unobstructed drainage away from the roadway to their original length or to daylight. If silt traps service the tail ditches then they are to be cleaned to their original dimensions and depth. Material excavated from these ditches is not to be reclaimed onto the roadway.

Unsuitable material may be spread on the fill slopes in a manner that will not affect watercourses or the roadway.

Drainage structure cleaning and reshaping will be measured to the nearest tenth of a mile, using an odometer calibrated over a measured mile. Measurement will be made along the road center line.

Payment will be made for all work of this activity, inspected and accepted, in accordance with the following pay item and unit price.

834 (01) Cleaning Culverts and Tail Ditches Mile

ACTIVITY CODE: 813 – SPOT SURFACING REPLACEMENT, AGGREGATE ROADS

813.00 - This activity consists of replacement of aggregate surfaces lost due to surface failure, traffic wear or erosion. The work includes preparation of the existing roadbed, furnishing, loading, hauling and spreading aggregate material and finished blading, as described in specifications. The task order will delineate the location of the necessary work and establish quantities of work required.

813.01 - Surface replacement for road segments shall be performed by cutting out, all damaged areas of the surface, and working aggregate material smoothly over the entire riding surface width. Avoid disturbing base or subgrade material during the placement of aggregate material. All roads to receive aggregate surfacing shall have the new aggregate deposited in the section being worked, mixed when required, and shaped to achieve proper grade, thickness and template as directed by the COR.

813.02 - Aggregate surface material shall not be allowed to remain on shoulders or in ditch lines as a result of Contractor’s operations. Aggregate surface material shall be compacted by operating the hauling and spreading equipment over the full width of each layer of aggregate. The entire area being worked shall be finish bladed in accordance with Activity Code 811: Blading Aggregate Surface Roads.

813.03 - Contractor is to provide and place crushed aggregate for surface repairs. The Contractor will deliver the crushed aggregate to the location of spot repair and provide weigh tickets for each delivery in accordance with Method of Measurements. The areas to receive aggregate shall be flagged with plastic ribbon or otherwise identified by USDA Forest Service personnel prior to placement.

813.04 – Surfacing replacement is complete when the designated quantity of the ordered material has been placed, spread, smoothed and compacted. Aggregate shall be spread to the depth and dimensions specified and/or directed by COR. The finished surface shall be free of hollows, depressions, and projections above the adjacent roadbed surface.

Aggregate will be measured by either tons or cubic yards as indicated in the bid schedule.

Measurement will be made to the nearest one tenth (0.1) of a pay unit for all materials provided, placed, inspected and accepted in place at the job site/spot repair location. Where material is measured by weight, the Contractor shall supply weight tickets from state approved scales showing aggregate type, source gross, tare and net weight. All materials supplied by volume shall be measured at the time of delivery by the COR. Material receipts shall be furnished by the Contractor for each truck load delivered and accepted.

following items and the unit price.

813 (01) Spot Surface Replacement, Aggregate Surfaced

Roads (Grading NCDOT ABC & ABC(M)) Ton