TECHNICAL_SPECIFICATIONS.docx

USDA – Forest service Collette Mine Rehabilitation Technical Specifications

Last Revision 5/5/2015

Contents

viii | Page

SECTION 1200

MEASUREMENT AND PAYMENT

PART 1 – Measurement of Work Take and record measurements and perform calculations to determine pay quantities for invoicing for work performed. Take or convert all measurements of work according to United States customary measure.

Unless otherwise specified, measure when the work is in place, complete, and accepted (Section 01720). Measure the actual work performed, except do not measure work outside the design limits or other adjusted or specified limits (staked limits). Measure structures to the lines shown on the plans or approved lines adjusted to fit field conditions.

Take measurements as described in Part 2 unless otherwise modified by the Measurement Subsection of the Section controlling the work being performed.

Remeasure quantities if it has been determined that any portion of the work is acceptable but has not been completed to the lines, grades, and dimensions shown on the plans or established by the CO.

Submit measurement notes to the CO within 24 hours of completing the work. For ongoing work, submit measurement notes weekly. When work is not complete, identify the measurement as being an interim measurement. Submit the final measurement when the installation is completed. Measurement notes form the basis of the Government’s receiving report. For lump sum items, submit documentation to support invoiced progress payment on a monthly basis.

Use an acceptable format for measurement records. As a minimum, include the following information in all records of measurement:

(a) Project name and number;

(b) Contract item number;

(c) Date the work was performed;

(d) Location of the work;

(e) Measured quantity;

(f) Calculations made to arrive at the quantity;

(g) Supporting sketch and details as needed to clearly define the work performed and the quantity measured;

(h) Name of persons measuring the work;

(i) Identification as to whether the measurement is interim or final; and

(j) Signed certification statement by the persons taking the measurements, performing the calculations, and submitting them for payment that the measurement and calculations are correct to the best of their knowledge and that the quantity being measured is subject to direct payment for the identified item under the contract.

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 (Section 01201):

As defined in Part 2 and supplemented above.

a) Actual Quantities (AQ).

b) Design Quantities (DQ).

c) Lump Sum Quantities (LSQ).

PART 2 – Measurement Terms and Definitions

1. Acre (AC). 43,560 square feet. Make longitudinal and transverse measurements for area computations horizontally unless specified on the ground surface. Do not make deductions from the area computation for individual fixtures having an area of 500 square feet or less.

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

3. Design quantity (DQ). The quantity to be paid is the quantity shown in the bid schedule. The design quantity will be adjusted for authorized changes that affect the quantity or for errors made in computing this quantity. If there is evidence that a quantity specified as a design quantity is incorrect, submit calculations, drawings, or other evidence indicating why the quantity is in error and request, in writing, that the quantity be adjusted. Design quantities will be adjusted only when there are errors in the original design of 15% or more. Changes in the number of units DESIGNATED IN THE SCHEDULE OF ITEMS may be authorized under any of the following conditions:

a) Changes in the work authorized by the CO.

b) A determination by the CO that errors exist in the original design that cause a PAY ITEM quantity to change by 15 percent or more.

c) A written request submitted to the CO showing evidence of errors in the original design that cause the quantity of a PAY ITEM to change by 15 percent or more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is in error.

4. Cubic yard (CY).

a) Cubic yard in place. Measure solid volumes by a method approved by the CO or by the average end area method as follows:

(a) Take cross-sections of the original ground and use with design or staked templates or take other comparable measurements to determine the end areas. Do not measure work outside of the established lines or slopes.

(b) If any portion of the work is acceptable but is not completed to the established lines and slopes, retake cross-sections or comparable measurements of that portion of the work. Deduct any quantity outside the designated or staked limits. Use these measurements to calculate new end areas.

(c) Compute the quantity using the average end areas multiplied by the horizontal distance along a centerline or reference lines between the end areas. Deduct any quantity outside the designed or staked limits.

b) Cubic yard in the hauling vehicle. Measure the cubic yard volume in the hauling vehicle using three-dimensional measurements at the point of delivery. Use vehicles bearing a legible identification mark with the body shaped so the actual contents may be readily and accurately determined. Before use, mutually agree in writing on the volume of material to be hauled by each vehicle. Vehicles carrying less than the agreed volume may be rejected or accepted at the reduced volume.

Level selected loads. If leveling reveals the vehicle was hauling less than the approved volume, reduce the quantity of all material received since the last leveled load by the same ratio as the current leveled load volume is to the agreed volume. Payment will not be made for material in excess of the agreed volume.

Material measured in the hauling vehicle may be weighed and converted to cubic yards for payment purposes if the conversion factors are mutually agreed to in writing.

c) Cubic yard in the structure. Measure according to the lines of the structure as shown on the plans except as altered by the CO to fit field conditions. Make no deduction for the volume occupied by reinforcing steel, anchors, weep holes, piling, or pipes less than 8 inches in diameter.

d) Cubic yard by metering. Use an approved metering system.

5. Each (EA). One entire unit. The quantity is the actual number of units completed and accepted.

6. Gallon. The quantity may be measured by any of the following methods:

a) Measured volume container.

b) Metered volume. Use an approved metering system.

c) Commercially packaged volumes.

7. Hour. Measure the actual number of hours ordered by the CO and performed by the contractor.

8. Linear foot. As applicable, measure the work along its length from end-to-end; parallel to the base or foundation; along the top; along the front face; or along the invert. Do not measure overlaps.

9. Lump sum quantity (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. Do not measure directly. The bid amount is complete payment for all work described.

10. Mile. 5,280 linear feet. Measure horizontally along the centerline of each roadway, approach road, or ramp.

11. Pound. Measure according to Part 3. If sacked or packaged material is furnished, the net weight as packed by the manufacturer may be used.

12. Square foot. Measure on a plane parallel to the surface being measured.

13. Square yard. 9 square feet. Longitudinal and transverse measurements for area computations will be made horizontally. No deductions from the area computation will be made for individual fixtures having area of 9 square feet or less.

14. Station. 100 linear feet. Measure horizontally along centerline or reference line of each roadway, approach road, or ramp.

15. Ton. 2,000 pounds avoirdupois. Measure according to Part 3. No adjustment in a contract unit price will be made for variations in quantity due to differences in the specific gravity or moisture content.

PART 3 – Weighing Procedures and Devices.

Batch masses may be acceptable for determination of pay quantities when an approved automatic weighing, cycling, and monitoring system is included as part of the batching equipment.

When a weighing device is determined to indicate less than true mass, no additional payment will be made for material previously weighed and recorded. When a weighing device is determined to indicate more than true mass, all material received after the last previously correct weighing accuracy test will be reduced by the percentage of error in excess of 0.5 percent.

When material is proportioned or measured and paid for by mass, provide one of the following:

(a) Commercial weighing system. Use permanently-installed and certified commercial scales.

(b) Invoices. If bulk material is shipped by truck or rail and is not passed through a mixing plant, furnish a supplier's invoice with net mass or volume converted to mass. Periodic check weighing may be required.

PART 4 – Receiving Procedures.

When the method of measurement requires weighing or volume measurement in the hauling vehicle, furnish a person to direct the spreading and distribution of material and to record the location and placement of the material on the project. During the placement, maintain a record of each delivery and document it in an acceptable manner. Include the following information as applicable:

(a) Project identification;

(b) Contract pay item number and description;

(c) Location where placed;

(d) Date;

(e) Load number;

(f) Truck identification;

(g) Time of arrival;

(h) Mass or volume; and

(i) Spread person's signature.

Use an approved format for the delivery record(s). Furnish the original record(s) and a written certification of the delivery of the material at the end of each shift.

PART 5 – Scope of Payment Payment for all contract work is provided, either directly or indirectly, under the pay items shown in the bid schedule.

1. Direct payment. Payment is provided directly under a pay item shown in the bid schedule when one of the following applies:

a. The work is measured in the Measurement Subsection of the Section ordering the work, and the bid schedule contains a pay item for the work from the Section ordering the work.

b. The Measurement Subsection, of the Section ordering the work, references another Section for measuring the work and the bid schedule contains a pay item for the work from the referenced Section.

2. Indirect payment. Work for which direct payment is not provided is a subsidiary obligation of the Contractor. Payment for such work is indirectly included under other pay items shown in the bid schedule. This includes instances when the Section ordering the work references another Section for performing the work and the work is not referenced in the Measurement Subsection of the Section ordering the work.

Compensation provided by the pay items included in the contract bid schedule is full payment for performing all contract work in a complete and acceptable manner. All risk, loss, damage, or expense arising out of the nature or prosecution of the work is included in the compensation provided by the contract pay items.

Work measured and paid for under one pay item will not be paid for under any other pay item.

The quantities shown in the bid schedule (Section 01201) are approximate unless designated as a design quantity. Limit pay quantities to the quantities staked, ordered, or otherwise authorized before performing the work. Payment will be made for the actual quantities of work performed and accepted or material furnished according to the contract. No payment will be made for work performed in excess of that staked, ordered, or otherwise authorized.

SECTION 01201

PAY ITEMS

PART 1 – General Individual pay items will be paid in accordance with Section 01200 and Section 01201. Pay items can be found on Sheet 1.1 of the project drawings in this package. This section will outline the individual pay items and requirements of each.

PART 2 – Pay Items Item 1-001 Mobilization and Demobilization The accepted quantity, measured as provided on Sheet 1.1 of the project drawings, will be paid at the contract price per unit of measurement for Pay Item 1-001 shown in the bid schedule. Payment will be full compensation for the work prescribed in Section 01300, 01505. Progress payments for mobilization lump sum will be paid as follows:

(a) Bond premiums will be reimbursed according to FAR Clause 52.232-5 Payments Under Fixed-Price Construction Contracts, after receipt of the evidence of payment.

(b) When 5 percent of the original contract amount is earned from other bid items, 50 percent of the mobilization item, or 5 percent of the original contract amount, whichever is less, will be paid.

(c) When 10 percent of the original contract amount is earned from other bid items, 75 percent of the mobilization item will be paid.

(d) The remaining 25 percent of the mobilization bid item will be paid upon final acceptance of the project to include, the cleaning, sorting and restocking of the temporary bridge materials in the Missoula yard.

Item 1-002 Water Management The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Water Management and Erosion Control work prescribed in Sections 01300, 01560, 02140.

Item 1-003 Tree Salvage The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Tree Salvage work prescribed in Sections 01400, 02932.

Item 1-004 Shrub Salvage The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Shrub Salvage work prescribed in Sections 01300, 01400, 02931.

Item 1-005 Sod Salvage The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Sod Salvage work prescribed in Sections 01300, 01400, 02931.

Item 1-006 Soil Salvage for Vegetative Fill from Project A The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Soil Salvage for Vegetative Fill from Project A work prescribed in Sections 01400, 02200, 02930.

Item 1-007 Soil Salvage for Vegetative Fill from Project B The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Soil Salvage for Vegetative Fill from Project B work prescribed in Sections 01400, 02200, 02930.

Item 1-008 Earthwork The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Earthwork work prescribed in Sections 01400, 01560, 02140, 02200, 02930, 05000, 05001, 05009, 05010.

Item 1-009 Vegetated Wood and Brush Fascine The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Vegetated Wood and Brush Fascine work prescribed in Sections 01300, 01400, 01560, 01600, 01640, 02140, 02200, 02910, 02929, 02931, 02932, and 05009.

Item 1-010 Large Wood Structure The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Large Wood Structure work prescribed in Sections 01300, 01400, 01560, 01600, 01640, 02140, 02200, 02929, 02931, 02932, and 05000.

Item 1-011 Floodplain Roughness The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for the Floodplain Roughness work prescribed in Sections 01300, 01400, 01560, 01600, 01640, 02200, 02900, 05001 and 05010.

Item 1-012 Rate for 300 Class Excavator and Operator The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for work performed in support of Pay Items 1-001 through 1-012.

Item 1-013 Rate for 10 Cubic Yard Dump Truck and Operator The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for work performed in support of Pay Items 1-001 through 1-012.

Item 1-014 Rate for Bulldozer and Operator The accepted quantities will be paid at the contract price per unit of measurement for the pay items listed in the bid schedule on Sheet 1.1 of the project drawings. Payment will be full compensation for work performed in support of Pay Items 1-001 through 1-012.

SECTION 01300

SUBMITTALS

PART 1 – GENERAL

1.1 SCOPE

Submittals covered by these requirements include manufacturers’ information, test procedures, test results, samples, requests for substitutions, and miscellaneous work-related submittals. Submittals shall also include, but not be limited to, rock sources, and fabricated items. The Contractor shall furnish all drawings, specifications, descriptive data, certificates, samples, tests, methods, and schedules and other instructions as specifically required in the contract documents to demonstrate fully that the materials and equipment to be furnished and the methods of work comply with the provisions and intent of the contract documents.

1.2 CONTRACTOR’S RESPONSIBILITIES

The Contractor shall be responsible for the accuracy and completeness of the information contained in each submittal and shall assure that the material, equipment or method of work shall be as described in the submittal. The Contractor shall verify that all features of all products conform to the specified requirements. Submittal documents shall be clearly edited to indicate only those items which are being submitted for review. All extraneous materials shall be crossed out or otherwise removed. The Contractor shall ensure that there is no conflict with other submittals and notify the Contracting Officer in each case where his submittal may affect the work of another contractor. The Contractor shall coordinate submittals among his subcontractors and suppliers including those submittals complying with unit responsibility requirements specified in applicable technical sections.

The Contractor shall coordinate submittals with the work so that work will not be delayed. The Contractor shall coordinate and schedule different categories of submittals, so that one will not be delayed for lack of coordination with another. No extension of time will be allowed because of failure to properly schedule submittals. The Contractor shall not proceed with work related to a submittal until the submittal process is complete. This requires that submittals for review and comment shall be returned to the Contractor stamped “NO EXCEPTIONS TAKEN” or “MAKE CORRECTIONS NOTED.”

The Contractor shall certify on each submittal document that he has reviewed the submittal, verified field conditions, and complied with the contract documents.

The Contractor may authorize in writing a material or equipment supplier to deal directly with the Contracting Officer with regard to a submittal. These dealings shall be limited to contract interpretations to clarify and expedite the work.

1.3 STANDARD COMPLIANCE

1. When materials or equipment must conform to the standards of organizations such as, but not limited to, the American National Standards Institute (ANSI), American Society for Testing and Materials (ASTM), National Electrical Manufacturers Association (NEMA) and Underwriter’s Laboratories (UL) documents showing, or proving, conformance shall be submitted.

2. If an organization uses a label or listing to indicate compliance with a particular standard, the label or listing will be acceptable evidence, unless otherwise specified in the individual Sections. In lieu of the label or listing, the Contractor shall submit a certificate from an independent testing organization, which is competent to perform acceptable tests, and is approved by the Contracting Officer. The certificate shall state that the item has been tested in accordance with the specified organization’s standard. For materials and equipment whose compliance with organizational standards or specifications is not regulated by an organization using its own listing or label as proof of compliance, a certificate of compliance from the manufacturer shall be submitted for approval. The certificate shall identify the manufacturer, the product, and the referenced standard and shall state that the manufacturer certifies that the product conforms to all requirements of the project Specification and of the referenced standards listed.

1.4 REVIEW OF CONTRACTOR’S INFORMATION

1. When review and checking for acceptance is required of any drawing or information regarding materials and equipment, the Contractor shall prepare or secure, and submit for review, two (2) copies. The Contracting Officer, after taking appropriate action, will return (1) marked copies to the Contractor.

Within 7 calendar days after receipt of said submittal copies, the Contracting Officer will return the marked copies indicating one of the following four (4) actions:

a. If review and checking indicates no exceptions, copies will be returned marked “NO EXCEPTIONS TAKEN” and work may begin immediately on incorporating the material and equipment covered by the submittal into the work.

b. If review and checking indicates limited corrections are required, copies will be returned marked “MAKE CORRECTIONS NOTED”. Work may begin immediately on incorporating into the work the material and equipment covered by the corrected submittal.

c. If review and checking indicates insufficient, or incorrect data, has been submitted, copies will be returned marked, “AMEND AND RESUMIT”. No work may begin on incorporating the material and equipment covered by this submittal into the work until the submittal is revised, resubmitted, and returned marked either “NO EXCEPTIONS TAKEN” or “MAKE CORRECTIONS NOTED”.

d. If review and checking indicates the material and equipment submittal is unacceptable, copies will be returned marked “REJECTED-RESUBMIT”. No work may begin on incorporating the material and equipment into the work until a new submittal is made and returned marked either “NO EXCEPTIONS TAKEN” or “MAKE CORRECTIONS NOTED”.

Approval by the Contracting Officer shall not relieve Contractor from responsibility for any errors or omissions in such drawings, nor from responsibility for complying with requirements of this Contract.

1.5 EFFECT OF REVIEW OF CONTRACTOR’S SUBMITTALS

Review of contract drawings, methods of work, or information regarding materials or equipment the Contractor proposes to provide, shall not relieve the Contractor of his responsibility for errors therein and shall not be regarded as an assumption of risks or liability by the Contracting Officer, or by any officer or employee thereof, and the Contractor shall have no claim under the contract on account of the failure, or partial failure, of the method of work, material, or equipment so reviewed. A mark of “NO EXCEPTIONS TAKEN or MAKE CORRECTIONS NOTED” shall mean that the Contracting Officer has no objection to the Contractor, upon his own responsibility, using the plan or method of work proposed, or providing the materials or equipment proposed.

PART 2 – PRODUCTS

2.1 MANUFACTURER’S DATA

Submittals for each manufactured item shall be comprised of manufacturer’s descriptive literature, drawings, diagrams, performance and characteristic curves, and catalog cuts. Manufacturer’s name, trade name, model or catalog number, nameplate data, size, layout dimensions, capacity, project specification references, and any other additional information necessary to establish contract compliance shall be clearly indicated.

PART 3 – EXECUTION

Items to be submitted are specified in individual Sections of these Specifications. Submittals for each Section shall be bound together in one book. Book shall have numbered tab dividers for each item. Submittals that are related to, or affect, each other shall be forwarded simultaneously as a package to facilitate coordinated review. Uncoordinated submittals will be rejected. Do not combine unrelated materials in the same submittal. Submittals shall be arranged in same order as they appear in the Specification Section. Items shall be clearly marked with the same identification number as indicated on the drawings. The Contractor shall include submittal time appropriate within each item of work on the Construction Schedule. The Contracting Officer will receive submittals at the preconstruction meeting.

At a minimum, the Contractor shall provide project submittals as shown on the following Submittal Log. Submittal requirements are listed in the Technical Specifications and Drawings.

Submittal Log

1-001

1-001

1-001

1-001

Drawing 4.3 Water Management 1-002

Drawing 4.3 Water Management 1-002

Drawing 8.1 Vegetated Wood and Brush Faschine 1-010

Drawing 4.4 Shrub Salvage 1-005

Drawing 8.2 Large Wood Structure 1-011

notification

1-001

Drawing 8.1 Vegetated Wood and Brush Fascine 1-010

Drawing 8.3 Floodplain Roughness 1-012

***END OF SECTION***

SECTION 01400

CONSTRUCTION STAKING

PART 1 – GENERAL

1.1 CONSTRUCTION STAKING

The Contractor shall provide survey staking for construction. The Contracting Officer will provide survey control and grading surfaces for equipment with GPS machine control capability. When the Contractor requires horizontal and vertical control the contractor shall notify the Contracting Officer of this requirement a minimum of three working days in advance of this need.

1.2 STAKEOUT AND MEASUREMENT TO BE PERFORMED BY CONTRACTOR

The Contracting Officer will provide an initial layout of the restoration design in consultation with the Contractor. After the initial layout, the Contractor shall be responsible for staking reference points/markers to complete the work from the initial control points and grading surfaces provided by the Contracting Officer, and shall be responsible for all measurements required for the execution of the work. The Contractor shall protect all stakes and shall pay for the time and materials required to replace stakes that have been disturbed or obliterated if necessary.

The Contractor shall use information provided by the Contracting Officer to stake the boundaries of construction extents, access roads, staging areas, heritage resources, materials salvage areas, vegetation preservation areas, grading extents and structure locations. The Contracting Officer shall approve staking boundaries prior to commencement of work. In addition, the Contactor shall stake reference points outside the construction extents of any existing survey control points (see Sheet 4.0 on project drawings). Upon completion of the project, the original survey control points will be restaked.

The Contractor shall furnish at the Contractor’s own expense, such stakes, equipment, tools, materials, and all labor as required in stakeout of any parts of the work from the control points and grading surfaces provided by the Contracting Officer.

The Contracting Officer may require that work be suspended at any time when location and limit marks established by the Contractor are not reasonably adequate to permit checking of the work.

SECTION 01505

MOBILIZATION AND DEMOBILIZATION

PART 1 – GENERAL

1.1 MOBILIZATION

Mobilization shall consist of preparatory work and operations, including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the site; for the establishment of all facilities necessary for work on the project; and for all other work and operations which must be performed, or costs incurred prior to beginning work, on the various items on the project site. Mobilization includes obtaining project-specific bonds and obtaining any permits, including the EPA’s Construction General Permit NOI (electronic NOI system, “eNOI”) for stormwater runoff, not provided by the Contracting Officer.

Mobilization shall also include the construction of temporary ramps and access ways, temporary bridge, staging areas, temporary roads, grading, temporary fencing, and the necessary preparatory work required to allow for the safe and stable movement of all vehicles that are required to construct the improvements outlined in the Contract Documents.

a. for spillage on land, construct earthen berms or use other suitable barricade material of sufficient size to contain the spell and keep it from spreading.

b. for spillage on water, attempt to isolate and contain the spilled material. Commercial booms or other suitable materials shall be kept on site during construction to contain fuel and oil spills on water.

The Idaho State Communication Center shall be notified at (800) 632-8000 or (208) 846-7610 if an amount greater that what is contained in a thermometer is found. The amount and location of mercury will be documented, even if less than what is contained in a thermometer, and reported to the Idaho Department of Environmental Quality, Lewiston Field Office. Any other mercury data collection during implementation of the project will be documented and shared with the Idaho Department of Environmental Quality.

1.2 SITE PREPARATION

1. Existing Conditions The Contractor shall determine the actual condition of the site as it affects this portion of the work.

2. Protection of Existing Facilities Site preparation shall not damage existing structures, landscaping, fencing, gates, or vegetation adjacent to the areas designated for site preparation. The Contractor shall repair or replace any and all damaged property.

3. Vegetation Preservation Preservation of existing vegetation and trees is of utmost importance. The Contractor will stake and walk the entire site with the Contracting Officer to clearly mark the clearing limits and vegetation to be saved or salvaged.

4. Clearing and Grubbing All areas comprising the work shall be cleared and grubbed to a depth necessary to remove all stumps, roots, buried logs and all other objectionable material of any kind.

The Contractor shall submit for approval by the Contracting Officer a Temporary Bridge Plan. The Contractor will be allowed to furnish the bridge, or use the Government furnished Acrow bridge material. The Temporary Bridge Plan shall address the following requirements:

The Contractor shall install a temporary road and bridge, as specified below, to accommodate construction traffic.

It is the responsibility of the Contractor to schedule delivery of materials, equipment and all necessary supplies to the sites, to ensure that the bridge can be substantially completed within the specified contract time. The Contractor shall be responsible for delivering, installing, maintaining, and removal of temporary bridge in accordance with these specifications.

Contractor supplied temporary bridge shall meet the following criteria:

1. Freeboard Height

a. Freeboard: Provide 2’ minimum freeboard measured from low chord of bridge to creek surface.

2. Bridge:

a. Load Rating: Bridge must be able to accommodate all legal highway vehicles. Load rating calculations shall be completed using LFR or LRFR AASHTO rating methodologies to demonstrate the operating rating or safe load capacity, respectively, in accordance with AASHTO’s Manual For Bridge Evaluation for Type 3, 3S2 and 3-3 AASHTO Trucks. Load Rating shall be completed by a Professional Engineer registered in the State of Idaho.

4. Contractor shall be responsible for construction and maintenance of temporary bypass bridge and approach roads to safely pass construction traffic over the bridge. Contractor shall prevent sediment from being introduced into the channel during construction and maintenance of approach roads for the temporary bypass.

5. Approach road shall be constructed with a minimum width of 14 feet.

6. Contractor shall be responsible for removal of temporary bypass bridge, approach roads, and restoration of the site according to the plans.

7. The Temporary Bridge Plan shall illustrate the proposed bridge layout including locations, types and dimensions of piers, abutments, approaches and scour protection measures.

8. The Temporary Bridge Plan shall include a narrative describing the method of installation.

9. The temporary bridge shall be sized to span the bankfull channel and convey the bankfull discharge.

10. The temporary bridge shall support the weight of construction equipment used in the execution of this contract.

Government Supplied Acrow Panel Temporary Bridge Description:

The Contractor will have the option to use Government furnished ACROW bridge material for the temporary bypass bridge installation. This work shall include the sorting, hauling, assembly and installation of Government furnished Acrow panel bridge material including designing and constructing a concrete footing, backwalls, and approach roadway fills. Work shall also include removal, disassembly, hauling and restocking of the Government furnished Acrow panel bridge material and reclaiming the bridge site.

Acrow Bridge Material:

Acrow panel bridge material is a modular system manufactured by:

Acrow Corporation of America 396 Washington Avenue Carlstadt, New Jersey 07072…