CIM-0900-1F-107-0922-01_DamReconstruction-ProvincePond-BrokenBridge_Specifications.pdf

PROVINCE POND AND BROKEN BRIDGE DAMS RECONSTRUCTION

CIM-0900-1F-107-0922-01

American Recovery & Reinvestment Act Project USDA Forest Service - Eastern Region - White Mountain National Forest

FOREST SERVICE SPECIFICATION

EASTERN REGION

REGION 9

WHITE MOUNTAIN NATIONAL FOREST

PROVINCE POND DAM

and

BROKEN BRIDGE DAM

RESTORATION

SPECIFICATIONS

September 22, 2009

SPECIFICATIONS

Item Description

10 GENERAL SPECIFICATIONS

20 CLEARING AND GRUBBING

30 REMOVAL OF WATER

40 EXCAVTION

60 EMBANKMENT

80 TOPSOIL

90 SEEDING

100 WATER CONTROL STRUCTURE

132 ACCESS ROAD

ESTIMATE OF QUANTITIES

Item Description Unit Quantity*

20-1 CLEARING AND GRUBBING Lump Sum 1 30-1 REMOVAL OF WATER Lump Sum 1 40-1 UNCLASSIFIED EXCAVATION Lump Sum 1 90-1 SEEDING Lump Sum 1 100-1 WATER CONTROL STRUCTURE Lump Sum 1 132-1 ACCESS ROAD Lump Sum 1

*See approximate quantities of materials on the drawings.

R-9 DAM SPECIFICATIONS

ITEM 10

GENERAL SPECIFICATIONS

DEFINITIONS AND TERMS

1.1 – Abbreviations

The following abbreviations are used in these specifications or on the drawings:

AASHO – American Association of State Highway Officials AGC - Associated General ASTM - American Society for Testing and Materials AWPA - American Wood Preserver’s Association AWS - American Welding Society FPR - Federal Procurement Regulations System USASI - United States of America Standards Institute GSA - General Services Administration

1.02 – Definitions

Wherever in these Specifications, or in other contract documents, the following terms or pronouns in place of them are used, the intent and meaning shall be interpreted as follows:

Engineer - (Contracting Officer’s Representative) – The duly authorized representative of the Contracting Officer.

Equipment - All machinery and equipment, together with the necessary supplies for upkeep and maintenance, and also tools and apparatus necessary for the proper construction and acceptable completion of the work.

Inspector – The Engineer’s authorized representative assigned to make detailed inspections of contract performance.

Laboratory – A testing laboratory of the Government or any other testing laboratory approved by the engineer.

Materials – Any substances specified for use in the construction of the project and its appurtenances.

Nominal Dimensions or Weights – The numerical values shown on the drawings or in the Specifications a measurements for work to be constructed.

Profile Grade – The trace of a vertical plane intersecting the top surface of the proposed construction, usually along the longitudinal centerline. Profile grade means either elevation or gradient of such trace according to the context.

10-1

Reasonably Close Conformity – Reasonably close conformity means compliance with reasonable and customary manufacturing and construction tolerances are not specified. Where working tolerances are specified, reasonably close conformity means compliance with such working tolerances.

Skew or Skew Angle - The complement of the acute angle between two centerlines which cross.

Specifications – A general term applied to all written directions, provisions, and requirements pertaining to performance of the work.

Special Project Specifications – Additions or revisions to the Specifications covering conditions peculiar ton individual project.

MAINTENANCE OF TRAFFIC

2.1 - Existing roads within the project area shall be closed to public traffic by the Contractor.

CONTROL OF WORK

3.1 – Conformity with Drawings and Specifications

All work performed and all materials furnished shall be in reasonably close conformity (see definition) with the lines, grades, cross sections, dimensions and material requirements shown on the drawings or indicated in the Specifications.

3.2 – Maintenance of the Work During Construction

In the case of a contract for the placing of a course upon a course or sub grade previously constructed, the Contractor shall maintain or restore the previous course or sub grade to the specified condition before the succeeding course is placed.

All cost of maintenance work during construction and before the project is accepted shall be included in the unit prices of the various pay items and the Contractor will not be paid an additional amount for such work.

CONTROL OF MATERIALS

4.1– Samples, Tests, Cited Specifications

When a reference is made in the contract to a specification, standard or test method adopted by AASHO, ASTM, GSA, or other recognized national technical association, it shall mean the specification, standard or test method (including interim or tentative issues) which is in effect on the date of advertisement for bids.

A copy of all methods will be furnished to the Contractor at his request.

4.2 – Handling of Materials

All materials shall be transported and handled so that their quality and fitness for work is preserved.

10-2

RESPONSIBILITY TO THE PUBLIC

5.1 – ARRA Project Funding Source Sign

The Contractor shall furnish and install “American Recovery and Reinvestment Act” Project Funding Source Sign Assembly prior to commencing construction. See sign details, required sign sizes are highlighted.

5.2 – Barricades, Warning Signs and Other Devices

The Contractor shall provide suitable warning signs to properly control and traffic. Roads closed to traffic shall be protected by effective barricades.

All barricades, warning signs, lights, temporary signals, and other protective devices shall conform to Part VI of the Manual on Uniform Traffic Control Devices for Streets and Highways, published by the Federal Highway Administration.

The Contractor shall furnish, erect, maintain, and remove when directed, any informational identification signs shown in the drawings.

5.3 – Control of Erosion and Sedimentation

The Contractor shall schedule and conduct his/her operations to minimize erosion of soils and to prevent silting and muddying of streams, rivers, irrigation systems and impoundments (lakes, reservoirs, etc.). Construction of drainage facilities and performance of other work which will contribute to the control of erosion and sedimentation shall be carried out in conjunction with earthwork operations or as soon thereafter as practicable.

The Contractor shall use temporary water pollution and soil erosion control during the life of the contract, including the use of berms, dikes, dams, sediment basins, fiber mats,, netting, gravel, mulches, grasses, slope drains, and other approved soil erosion control devices or methods to control water pollution.

At the Preconstruction Conference or prior to the start of the applicable construction, the Contractor shall submit in writing his/her plan and schedule for accomplishment of temporary and permanent water pollution and soil erosion control work, and his/her plan for disposal of waste materials.

No work shall be started until the water pollution and soil erosion control plan and schedule has been accepted by the Engineer.

As a minimum all exposed areas such as cut slopes, fills, ditches, borrow pits, and cleared areas shall be treated with the applicable grass establishment requirement prior to the end of the spring and fall planting seasons. Operations shall be scheduled in such a manner to facilitate maximum use of permanent stabilization.

The Engineer will limit the areas of clearing and grubbing; excavation; borrow and embankment operations in progress commensurate with the Contractor’s capability and progress in keeping the water pollution and soil erosion control measures current in accordance with the accepted plan and schedule.

Should seasonal limitations make such coordination unrealistic, temporary water pollution and soil erosion control measures shall be taken immediately.

10-3

The Contractor shall incorporate all permanent water pollution and soil erosion control features into the project at the earliest practicable time as outlined in his accepted plan and schedule. Temporary control measures will be used to correct conditions that develop during construction that were not foreseen during the design stage; that are needed prior to installation of permanent control features; or that are needed temporarily to control water pollution and soil erosion that develops during normal construction practices, but are not associated with permanent control features. Temporary control measures may be required between successive construction stages where water pollution and soil erosion are likely to be a problem.

In the event that temporary water pollution and soil erosion control measures are required due to the Contractor’s negligence, carelessness, or failure to install permanent controls as a part of the work as scheduled, such work, as ordered by the Engineer, shall be performed by the Contractor at his own expense.

Prior to suspension of construction operations for appreciable lengths of time, the Contractor shall shape the earthwork in a manner that will permit storm runoff with a minimum of erosion. Temporary erosion and sediment control measures such as berms, dikes, slope drains, or sedimentation basis deemed necessary by the Engineer shall be provided and maintained until permanent drainage facilities and erosion control features are completed and operative.

Temporary bridges or other structures used for stream crossing will not be paid for directly, bit will be considered as a subsidiary obligation of the Contractor covered under the various contract items of work.

Temporary water pollution control may include work outside the project site where such work is necessary as a result of borrow pit operations, haul roads, and equipment storage sites.

Pollutants such as fuels, lubricants, bitumens, raw sewage and other harmful materials shall not be discharged into or near rivers, streams, and impoundments or into natural or manmade channels leading thereto. Wash water or waste from concrete mixing operations shall not be allowed to enter live streams.

Mulches for temporary control measures shall be free from noxious weed and other objectionable material and shall be approved b the Engineer.

Slope drains may be constructed of pipe, fiber mats, rubble, Portland cement concrete, bituminous concrete, plastic sheets or other material acceptable to the Engineer.

Grasses shall be of quick growing species, as prescribed by the Engineer, providing a temporary cover which will not later compete with the grasses sown for permanent cover.

All waterways shall be cleared of debris or obstructions places during construction operations and not a part of the finished work, as soon as that portion of the work is completed.

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MEASUREMENT AND PAYMENT

6.1 – Measure of Quantities

All work completed under the contract will be measured by the Engineer according to the United States standard measure.

A station when used as a definition or a term of measurement will be 100 linear feet.

The methods of measurement and computation to be used in the determination of quantities of materials furnished and work performed under the contract will be those generally recognized as conforming to good engineering practices.

Unless specified herein or on the drawings, for individual construction items, longitudinal and lateral measurements for area computations will be made horizontally.

Structures will be measured according to neat lines shown on the drawings or as altered to fit conditions.

All items which are measured by linear foot, such as pipe culverts, guardrail, etc., will be measured parallel to the longitudinal axis of the item in place, unless otherwise shown on the drawings.

In computing volumes of excavation or embankment, the average end-area method will be used.

The longitudinal measurement will be made on the centerline and no adjustment will be made for curvature. However, of the Engineer determines that average end-area measurement is not practical, he may direct measurement by volume in hauling vehicles or by other three dimensional measurements of material in place, with mutual agreement with Contractor as to unit volume adjustment or estimated dimensions.

The term “gage” when used in conjunction with the measurements of plates, will mean the U. S.

Standard Gage, except that when reference is made to the measurement of metal sheets used in the manufacture of corrugated metal, pipe, metal plate culverts and arches, and metal cribbing, then the term “gage” or thickness will mean that specified in Federal Specifications WW-P-405a or WW-P-402c, as applicable.

Materials to be measured by volume in the hauling vehicle shall be hauled in approved vehicles and measured therein at the point of delivery. Vehicles for this purpose may be of any size and type accepted to the Engineer, provided that the body is of such shape that the actual contents may be readily and accurately determined. All vehicles shall be loaded to at least their water level capacity and any designated loads shall be leveled when the vehicles arrive at the point of delivery, if so directed by the inspector.

Timber will be measured by the thousand board feet (M. B. F) actually incorporated in the structure. Measurement will be based on nominal widths and thickness and the extreme usable length of each piece.

The term “lump sum” when used as an item of payment will mean complete payment for such work described in the contract.

When a complete structure or structural unit (in effect, “lump sum” work) is specified as the unit of measurement, the unit will be construed to include all necessary fittings and accessories.

10-5

When standard manufactured items are specified such as fence, wire, plates, rolled shapes, pipe conduits, gates, valves, etc., and these items are identified by gage, unit weight, section dimension size, etc., such identification will be considered to be nominal weights, size or dimensions. Unless more stringently controlled by tolerances in cited Specifications, manufacturing tolerances established by the industries involved will be accepted.

No direct payment will be made for work under this item but the cost will be considered to be included in bid prices of the contract.

10-6

ITEM 20

CLEARING AND/OR GRUBBING

DESCRIPTION

1.1 – Clearing and/or grubbing consists of cutting and disposing of trees, brush, windfalls, logs and other vegetation within the limits designated to be cleared, and the removal and disposal of roots, stumps, logs, and other timber. Included in this item is the removal and disposal of all snags and unstable trees, not located within the clearing limits, that may fall into the construction area. Railroad ties, corduroy and timber cribbing removed will be considered part of the excavation.

The areas designated to be cleared and/or grubbing shall be the areas staked on the ground or shown on the drawings. In general, areas to be cleared and/or grubbed will be embankment, structure, spillway, and borrow areas.

CONSTRUCTION METHODS

2.1 – Clearing will be classified according to the following definitions:

Clearing requires that trees and other woody vegetation be cut off flush with the ground surface.

Clearing and grubbing shall be completed prior to topsoil stripping, excavation, fill placement or structural construction.

Grubbing need not be performed within the limits of marsh excavation or marsh disposal areas.

Trees specifically marked for saving shall be left standing and uninjured.

Trees shall be felled so as to prevent damage to the trees that are left standing. When necessary to prevent damage to structures, other trees, or property, trees shall be cut in sections from the top downward.

When grubbing is required, all stumps, roots larger than one inch in diameter, and matted roots shall be dug out and removed.

Clearing and grubbing of Access Road to the dam site is included in Item 132, Access Roads.

2.2 – Disposal of Refuse Complete disposal is required of all refuse timber, logs, brush, stumps, roots, rotten wood, and other refuse from the clearing and grubbing operations. A disposal site or sites will be identified by the Engineer.

20-1

MEASUREMENT

3.1 – Lump Sum Basis When the Schedule of Items contains a lump sum item, no measurement of area will be made.

PAYMENT

4.1 – The contract unit price for clearing and/or grubbing shall be on a lump sum basis as shown in the Schedule of Items.

4.2 – The prices and payment shall be full compensation for all labor, equipment, tools, and incidentals necessary to complete the specified work.

Pay Item No. and Name Unit of Measurement 20-1, Clearing and Grubbing Lump Sum

20-2

ITEM 30

REMOVAL OF WATER

1.1 – Work performed under this item shall consist of the removal of surface water and ground water as required to construct the project components in accordance with the plans and specifications. It will include; (1) constructing and maintaining all necessary temporary cofferdams, channels, dikes and diversions; (2) furnishing, installing and operating all pumps, piping and other facilities and equipment for dewatering; and (3) removing all such temporary works and equipment after they have served their purpose, unless otherwise directed.

SURFACE WATER

2.1 – The contractor shall provide and maintain impounding works, or diversions suitable to control and pass stream flow and other surface water through or around the permanent works site and borrow areas during construction. Unless otherwise diversions must discharge into the same natural drainage way in which its headwaters are located. Location of diversions and cofferdams shall be to the mutual advantage of the Contractor and to the Forest Service and must be approved by the Engineer. Responsibility for the adequacy of the temporary works rests with the Contractor.

DEWATERING

3.1 – The Contractor shall provide, operate and maintain all pumps, piping and other facilities and equipment necessary to remove water from the permanent works area and borrow areas during construction.

Dewatering shall be accomplished in such a manner that all construction work can be performed in the dry except: (1) excavation that can be done under water to the specified units and tolerances without adversely affecting any other part of the work; (2) operations specifically excepted elsewhere. Dewatering of foundations shall be accomplished by methods that will prevent the loss of fines from the foundation material.

Unless otherwise specified, borrow areas shall be maintained in a drainable condition or provision shall be made for timely and effective removal of surface water that may accumulate for any reason.

REMOVAL OF TEMPORARY WORKS

4.1 – After the temporary works have served their purpose, the Contractor shall remove them or level and grade them to the extent required to present a sightly appearance and to prevent any obstruction to the flow of water to and through spillways and outlet works or any other interferences with the operation, or access to, the permanent works. Temporary control of surface and ground waters shall be maintained by the Contractor until that portion of the permanent works has been completed and approved by the Engineer to assure compliance with specifications. The Contractor shall be responsible for such control until final acceptance of the project.

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5.1 – The contract price for “Removal of Water” shall be lump sum in the Schedule of Items. Such payments will constitute full compensation for furnishing all labor, equipment, tools, and materials necessary for “Removal of Water.”

Pay Item No. And Name Unit of Measurement

30-1, Removal of Water Lump Sum

30-2

ITEM 40

EXCAVATION

1.1 – Excavation consists of excavating, hauling and disposing of all material taken from within the limits of the dam embankment, dikes, spillways, ditches, channels and waterways in conformity with lines, grades, and dimensions shown on the plans or as staked by the Engineer.

Except when otherwise provided, this work shall also include the removal and disposal of railroad ties, corduroy, timber cribbing, structures, stone fences, stone piles, and surplus and unsuitable materials that lie within the limits of construction. It shall also include replacement of unsuitable materials with approved materials, trimming, finishing and maintaining the work in a satisfactory condition until acceptance.

This item does not include material obtained from borrow pits outside the limits of construction, nor does it include excavation for items for which separate and specific specifications are provided elsewhere.

CLASSIFICATION

2.1 – Excavation will be designated as unclassified excavation in accordance with the following definition:

a. Unclassified excavation shall include all materials encountered regardless of their nature or the manner in which they are removed.

USE OF EXCAVATED MATEIRIALS

3.1 – To the extent that they are needed, all suitable materials removed from the specified excavations shall be used in the construction of the specified earth portions of the permanent works. The suitability of materials for specific purposes will be determined by the Engineer. The Contractor shall not waste, or otherwise dispose of, suitable materials.

Excavated materials not suitable for use in construction such as soil containing sod or humus, stripped materials, and marsh excavated materials shall, when directed by the Engineer, be wasted or shall be stockpiled for later use in landscaping.

DISPOSAL OF WASTE MATERIALS

4.1 – All surplus or unsuitable excavated materials designated as waste by the Engineer shall be disposed of at the locations as directed by the Engineer.

5.1 – Prior to beginning excavation and grading operations in any area, all required clearing and grubbing in that entire area shall have been completed. Prior to beginning excavation and grading operations in any area, all topsoil, sod, humus, and other organic material not suitable in foundations or earth embankments shall be removed from the entire area by stripping to mineral soil.

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5.2 – All excavated material shall be used in the embankment where directed by the Engineer unless written permission is given to waste it.

5.3 – Excavated materials to be considered suitable for use in the construction of the specified earth or rock filled portions of the permanent works must not contain logs, muck, frozen material, stumps, brush, sod, or other deleterious material.

5.4 – Material must not be deposited in any stream channel. Any material which inadvertently becomes so placed shall be removed as directed by the Engineer and at the Contractor’s expense.

5.5 – Excavation of marshes shall begin at one end and shall proceed in one direction across the entire marsh immediately ahead of backfilling. The method and sequence of excavating and backfilling shall completely remove or displace all peat or muck to the bottom of the marsh.

Unless otherwise provided for, excavated marsh material shall be temporarily deposited outside of the embankment foundation area and after completion of the embankment shall be placed against the fill slopes, or, if wasted, shall be disposed of as directed by the Engineer.

No separate measurement or payment will be made for the excavation of marsh materials.

5.6 – The side slopes necessary to maintain the stability of excavated surfaces may not necessarily coincide with the pay limits specified for structure excavation from sliding or settling and to prevent damage to adjacent existing improvements. When such bracing and support is required, the width of the excavation shall be adjusted to allow for the space occupied by the sheeting, bracing and other supporting installations. The Contractor shall furnish, place and subsequently remove such supporting installations.

Such excavations shall be completed to the specified elevations and to sufficient length and width to include allowance for forms, bracing and supports, as necessary, before any concrete or earth fill is placed, or any piles are driven within the limits of the excavation.

5.7 – All earth slopes shall be finished to surfaces that will merge with the adjacent terrain without any noticeable break.

6.1 – Payment shall be made at the Lump Sum as listed in the Schedule of Items.

Payment shall be full compensation for all labor, equipment, tools, and incidentals necessary to complete the specified work, which may include:

a. The excavation and hauling of excavated material.

b. The placement, forming, and compacting of embankment and backfill.

c. The finishing in conformity with lines, grades, and typical cross sections, shown on the drawings.

d. Toe drains filter excavation.

e. Removal of railroad ties, corduroy and timber cribbing.

Pay Item No. and Name Unit of Measurement

40-1, Unclassified Excavation LS

40-2

ITEM 60

EMBANKMENT

1.1 – Work performed under this item shall consist of placing in embankments and/or backfills the materials obtained from Excavation or Borrow in accordance with the specifications and in conformity with the lines, grades, cross-sections, and dimensions shown on the plans or as staked by the Engineer.

Included under this item is foundation preparation for, embankments, placement, spreading, watering, and compaction of fill materials and the finishing of fill surfaces.

1.2 – This is a performance specification for which separate payment will not be made.

Compensation for performance under this specification is to be included in the unit prices bid for Excavation and/or Barrow.

GENERAL

2.1 – Clearing and grubbing of the entire dam foundation area shall be completed prior to topsoil stripping, excavation, fill placement or structural construction.

2.2 – The entire dam foundation area (and entire upstream impervious blanket area when such blanket is called for on the plans) shall be stripped to mineral soil prior to excavation or placement of fill of any kind.

2.3 – The suitability of the foundation for placing embankment materials thereon and of all materials for use in embankment construction will be determined by the Engineer. Material placed in the embankment, whether from excavation for other parts of the work or from borrow pits, shall be placed in the location designated by the Engineer. Unless otherwise specified or directed, the most impervious material shall be places in the central portion of the embankment and the more pervious material shall be placed so that the permeability of the embankment will be gradually increased toward the upstream and downstream slopes of the embankment.

2.4 – Fills shall be constructed to the lines, grades, and cross-section shown on the plans unless otherwise directed by the Engineer. All finished surfaces shall be generally smooth and pleasing in appearance.

2.5 – No fill shall be places upon a frozen surface, nor shall snow, ice, or frozen material be incorporated in the fill.

2.6 – The Contractor shall maintain and protect all fill in a satisfactory condition at all times until final completion of all work. Any fill material found unsuitable after being placed in the fill and before final acceptance of the work shall be replaced by the Contractor in a satisfactory manner and no additional payment will be made therefore. The Contractor may be required to remove, at his own expense, any fill material places outside of the prescribed lines.

2.7 – Access and haul roads shall be located and constructed as approved by the Engineer. They shall be constructed to be free draining and shall be maintained in good condition throughout the contract period, unless otherwise directed by the Engineer.

60-1

MATERIALS

3.1 – All fill materials shall be obtained from required excavation areas. The selection, blending, routing, and disposition of material within the various fills shall be subject to approval by the Engineer. Material coming from required excavation or borrow area in the form of large lumps or masses shall be pulverized by disking, harrowing or by the use of mechanical pulverizers prior to compacting.

3.2 – Mixing of materials during the excavation process may be required. Pockets of material of uniform particle size, such as sand, when encountered, shall be proportionally mixed with other material to obtain an acceptable fill material or shall be wasted when so directed by the Engineer.

3.3 – Fill materials shall not contain no logs, much humus, sod, brush, roots, or other perishable materials; nor shall the fill contain any frozen material.

3.4 – Mineral soil for fill shall be free of stones having a maximum dimension of more than 3 inches when compacted by suitable equipment, and more than 2 inches in diameter where compacted by hand tampers. Should any undesirable material be hauled onto the fill, it shall be removed prior to compacting operations.

4.1 – If, in the opinion of the Engineer, the surface of the prepared foundation or the rolled surface of any layer of earth fill is too dry or smooth to bond properly with the layer of material to be placed thereon, it shall be moistened and/or worked with harrow, scarifier, or other suitable equipment in an approved manner to a sufficient depth to provide a satisfactory bonding surface before the next succeeding layer of earth fill material is places. If, in the opinion of the Engineer, the rolled surface of any layer of the earth fill in place is too wet for proper compaction of the layer of earth fill material o be places thereon, it shall be removed, allowed to dry or be worked with harrow, scarifier, or other suitable equipment to reduce the water content to the required amount and then is shall be recompacted before the next succeeding layer of earth fill material is placed.

4.2 – The distribution of materials throughout fill shall be such that there will be no lenses, pockets, streaks or layers of material differing substantially in texture or gradation from the surrounding material in the fill. After placement, the fill materials will be spread by motor grader or other approved equipment. The thickness of the layers before compaction shall not be more than 12 inches. No material placed in the fill by dumping in piles or windrow shall be incorporated in a layer in that position, but shall be moved and spread by blading or similar approved methods. Compacted fill shall not be places against a slope steeper than 1 horizontal to 1 vertical unless otherwise shown on the drawing or approved by the Engineer. All loose material deposited at the base of such slopes shall be removed or spread before additional fill material is places.

4.3 – Embankment fill shall be placed in approximately horizontal layers extending the entire length and width of the embankment. The lengths of the sections and the end slopes will be determined by the Engineer where operations are not continuous throughout the entire length of the fill. Unless otherwise specified, the elevation of the embankment surface shall be increased at approximately the same rate of all points regardless of the number of zones or types of material being places, except that; (1) the boundary surfaces of the drain fill shall be maintained with a crown or cross-slope of not less than 2 percent to insure effective surface drainage.

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4.4 – Backfill material shall be placed and spread in layers not more than 6 inches thick before compaction.

4.5 – Hand-compacted backfill shall be placed in layers not thicker than 4 inches.

4.6 – Backfill over and around structures shall be brought up uniformly on all sides in order to avoid distortional stresses in the structure.

4.7 – When permitted material used to replace excavated material from marsh areas, or for the displacement of unsuitable material, shall unless otherwise directed by the Engineer, be carried forward in a wedge shape profile view and to a height sufficient to expedite displacing the unsuitable materials sideways from the area. A temporary surcharge of 4 feet shall be maintained at the site of filling, with such surcharge being moved forward as the filling progresses.

MOISTURE CONTROL

5.1 – During compaction operations the surface of the fill and the materials being places shall be maintained within a moisture content range required to permit proper compaction to the desired density with the equipment used.

5.2 – The moisture content shall be controlled in the following manner:

Water may be added to the fill materials in the borrow area or after the material has been brought onto the fill; whichever is the most practical. When material deposited on the fill is too dry, the Contractor shall be required to sprinkle each layer and obtain uniform moisture distribution in the layer by disking, blading or other approved methods. The amount of water applied shall be controlled so that free water will not appear on the surface during or subsequent to compaction operations.

Material deposited on the fill that is too wet shall be removed or spread and permitted to dry assisted by disking or blading, if necessary, until the moisture content is reduced to the specified limits.

When the top surface of a partial fill becomes too dry or compacted to permit suitable bond with the subsequent layer, the Contractor shall loosen the dried material by scarifying or disking. He shall then moisten the loosened material to an acceptable moisture content and recompact the material to the specified density.

COMPACTION

6.1 – Layer placement, vibratory roller compaction. Fill material shall be placed as specified in Section 4. Compaction equipment shall be operated over the full length and width of each layer until visible deformation ceases and approved by the Engineer. In all cases, no less than four complete passes shall be made.

60-3

6.2 – The Contractor shall furnish and operate the necessary types and kinds of equipment to perform the operations required to obtain the compaction specified. The equipment shall be in good working order and shall be of the capacity, weight, and/or power necessary to perform the required operations in a workmanlike manner and produce satisfactory progress in construction.

After each layer of backfill material has been places and the moisture content is in accordance with these specifications, it shall be compacted to the same density requirements as specified for adjoining sections of compacted fill, or as otherwise specified.

After each layer of fill material has been placed, spread, and contains the required moisture content specified, it shall be compacted by passing suitable equipment over the entire surface of the layer a sufficient number of times to obtain the density required.

Portions of the fill which are not accessible to large equipment shall be placed in 4 inch layers and compacted with power tampers to a density equal to that required for other portions of the fill.

6.3 – Adjacent to structures, compaction of fill shall be accomplished by means of hand tamping or manually directed power tampers or plate vibrators. Heavy equipment, except vibrating rollers shall not be operated within 5 feet of any structure. Compaction by means of drop weights operating from a crane or hoist of any type will not be permitted.

REMOVAL AND REPLACEMENT OF DEFECTIVE FILL

7.1 – Fill placed at densities lover than the specified minimum density or at moisture contents outside the specified acceptable range of moisture content or otherwise not conforming to the requirements of the specifications shall be reworked to meet the requirements or removed and replaced by acceptable fill. The bottoms of such excavations shall be finished flat or gently curving and at the sides of such excavations the adjacent sound fill shall be trimmed to a slope not steeper than 3 feet horizontal to 1 foot vertical extending from the bottom of the excavation to the fill surface.

8.1 – Embankment shall not be measured for direct payment.

PAYMENT

9.1 – The work prescribed in this item will not be measured or paid for directly, but shall be considered as subsidiary work pertaining to and included under Excavation, and other excavation items of work and will constitute full compensation for all labor, materials, equipment and all other items necessary and incidental to the performance of the work. The work shall include the formation, compaction, watering, sloping, trimming, finishing, maintaining, and all other work incidental thereto.

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ITEM 80

TOPSOIL

1.1 – This item shall consist of furnishing and placing topsoil in accordance with these specifications and in the locations shown on the drawings or designated by the Engineer.

MATERIAL

2.1 – Material stockpiled from stripping or marsh excavation operations will be used for topsoil.

CONSTRUCTION METHODS

3.1 – After completion of the embankment and emergency spillway, all exposed areas as shown on the drawings and those areas not permanently submerged or otherwise covered by riprap or other surfacing, shall be covered with topsoil.

3.2 – On areas which are intended to receive topsoil, the sub grades shall be roughened to a depth of two inches for the bonding of the topsoil with the sub grade.

3.3 – Topsoil shall not be placed when the sub grade is frozen or in a condition otherwise detrimental to proper grading and seeding, as determined by the Engineer.

3.4 – Topsoil shall be spread to a uniform depth of 2 inches. All clods and lumps shall be broken down to provide a uniformly textured soil. Rocks, twigs, large clods that will not break down, and other foreign material shall be removed. The entire surface shall be dressed to present a uniform appearance. Rolling will not be required. Spreading shall be so completed that seeding, sodding, or planting can proceed after completion of this work, without additional soil preparation.

MEASUREMENT AND PAYMENT

4.1 – Topsoil shall not be measured for direct payment.

4.2 – The work prescribed in this item will not be measured or paid for directly, but shall be considered as subsidiary work pertaining to and included under Excavation, and other topsoil items of work and will constitute full compensation for all labor, materials, equipment and all other items necessary and incidental to the performance of the work.

80-1

ITEM 90

SEEDING

1.1 – Work under this item consists of seeding the areas shown on the plans or designated by the Engineer. Included in this item is seeding and mulching. Also included is the furnishing of all materials, labor, and equipment necessary to complete the work.

2.1 – Seed

a. Contractor shall use the following recommended mixture for seeding, unless substitutions are approved by the Engineer:

New England Warm Season Mix by New England Wetland Plants, Inc.

(www.newp.com) 413-548-8000

23#/acre (1 pound per 1900 square feet)

AND

Winter Rye 45#/acre (1 pound per 1000 square feet)

b. Seed shall be furnished separately or in a mixture in standard containers with

(1) seed name, (2) lot number, (3) net weight (4) percentages of purity and of germination and hard seed, and (5) percentage of maximum weed seed content, clearly marked for each kind of seed. The Contractor shall furnish the Engineer duplicate signed copies of a statement by the vendor certifying that each lot of seed has been tested by a recognized laboratory for seed testing within 6 months of date of delivery. This statement shall include: (1) name and address of laboratory, (2) date of test, (3) lot number for each kind of seed, and (4) results of tests as to name, percentages of purity and germination, and percentages of weed content, for each kind of seed furnished and, in case of a mixture, the proportions of each kind of seed.

2.2 – Mulch material shall be straw, or other approved nontoxic material.

90-1

3.1 – After completion of the embankments, borrow pit and emergency spillways (and topsoil applied when required) has been completed, all exposed areas not permanently submerged or otherwise covered by riprap or surfacing shall be established in a vegetative cover by seeding.

3.2 – Topsoil, when required, shall be applied in accordance with Item 80, Topsoil.

3.3 – After grading of area has been completed, the area to be seeded shall be raked or otherwise cleared of stones larger than 2 inches in diameter, sticks, stumps, and other debris which might interfere with sowing of seed, growth of grasses, or subsequent maintenance of grass covered areas. If any damage by erosion or other causes has occurred after the completion of grading, the Contractor shall repair such damage. This may include filling gullies, smoothing irregularities, and repairing other incidental damage.

3.4 – Seeding shall be done during the seasons approved by the Engineer; but shall not be done during windy weather, or when the ground is dry, excessively wet, frozen or otherwise untillable.

3.5 – Grass and legume seeds shall be sown only when conditions are favorable. Seed shall be sown at the rate specified by approved equipment. Seeds of legumes, either alone or in mixtures, shall be inoculated before mixing and sowing, in accordance with the instructions of the manufacturers of the inoculant.

3.6 – The seeded area shall be covered with mulch within 24 hours from the time seeding has been completed, weather and soil conditions permitting. The mulch shall be spread uniformly at a rate of one bale per one thousand square feet. It may be spread by hand, by a blower, or other equipment. The mulch shall be loose enough to allow sunlight to penetrate and air to circulate, but dense enough to shade the ground, reduce rate of water evaporation, and prevent or reduce water or wind erosion. The mulch shall be held in place by covering with brush, by covering lightly with soil, by staking and tying, or by action methods approved by the Engineer.

3.7 – The Contractor shall protect seeded areas against traffic b warning signs or barricades, as approved by the Engineer. Surfaces gullied or otherwise damaged following seeding and mulching shall be repaired by regarding, reseeding, and remulching, as directed. The Contractor shall maintain the seeded and mulched areas in satisfactory condition until final inspection and acceptance of this item of work.

MEASUREMENT AND PAYMENT

4.1 – Payment shall be made at the Lump Sum as listed in the Schedule of Items.

Payment shall be full compensation for all labor, equipment, tools, and incidentals necessary to complete the specified work.

PAYMENT

5.1 – The work shall be paid for at Lump Sum, and the price and payment shall be full compensation for furnishing and placing all material and for all labor, equipment, tools and incidentals necessary to complete the work prescribed in this item.

Pay Item No. and Name Unit of Measure

90-1 Seeding LS

90-2

ITEM 100

WATER CONTROL STRUCTURE

1.1 – This item consists of furnishing all materials, fabricating and installing the water control structure, complete with all appurtenances and hardware, as shown on the plans and as called for in the specifications. Structural excavation for the structure, dewatering, backfilling and the providing of all tools, equipment, materials, testing and labor necessary to complete the work is considered part of this item.

MATERIALS

2.1 – Joints shall be gasketed with 2” x 4” keyway with water stop, as shown on the drawings.

2.2 – Structural steel shall conform to ASTM Designation A36, “Structural Steel” and shall be galvanized in accordance with ASTM Designation A153, “Zinc Coating (Hot Dip) on Iron and Steel Hardware.”

2.3 – Timber stop logs shall be #1 Douglas fir, 4” x 8” x 4’1” members.

2.4 – Granular bedding shall be a graded aggregate product which all passes a one inch sieve and not more than 10 percent will pass a #200 sieve.

2.5 – Concrete. A mix design showing the weights of aggregate, water and cement, proposed as pounds per cubic yard of concrete, shall be furnished to the Engineer. Cement, aggregate, and water shall be proportioned to obtain concrete with good workability. Slump shall not be more than 3 inches as determined by AASHTO T 119. Air entrainment shall be 5 percent +1 as determined by AASHTO T 119. Air entrainment shall be 6 percent +1 as determined by AASHTO T 152. Set retarding admixtures may be allowed with the Engineer’s approval.

The concrete shall develop a minimum compressive strength of 4,000 psi in 28 days as determined by test cylinders made in accordance with AASHTO T23 and tested in accordance with AASHTO T 22.

Failure of two out of three cylinders for any pour shall require the removal of the concrete.

3.0 – Forms. Forms shall be designed and constructed s they can be removed without injuring the concrete. They shall be free of bulge and warp, and constructed so the finished concrete shall be of the form and dimensions shown on the drawings and true to line and grade.

3.1 – Concrete testing shall be performed by a qualified testing company and/or facility approved by the Engineer.

100-1

THIS SECTION IS FOR PROVINCE POND DAM CONSTRUCTION ONLY: Due to the remote location of this project and lack of an adequate access for concrete trucks to deliver product directly to the site, the specified pre-mixed concrete needs to be delivered to the project site by air (helicopter and long-line bucket).

An approved staging area and/or landing zone will be provided within 2 air miles of the project site for the loading of product, fueling and maintenance of the ship.

Possible helicopter services (but not limited to):

JBI Helicopter Services, Inc., Pembroke, NH, 603.225.3134, www.jbihelicopters.com Maine Helicopters, Inc., Whitefield, ME, 207.549.3400, www.mainecopters.com York County Helicopters, Sanford, ME, 603.772.1555, www.yorkcountyhelicopters.com

(End of section for Province Pond Dam only.)

3.1 – Placing Concrete. Prior to placing concrete, reinforcing steel shall be placed in accordance with the drawings. Concrete shall not be placed until the earth, grading, forms, and steel reinforcements have been inspected and approved by the Engineer.

It is preferred that all concrete placement be scheduled to be completed in a single pour and/or in one day, but flying time may not allow for this to be completed. In such a case, the entire section shall be completed (bottom or side). No cold joints shall be allowed, except those keyed and with waterstop as shown on drawing S2.

Concrete shall be discharged into the forms within 1 ½ hours after the introduction of the cement to the aggregate, 2 hours if set retarder is used. Retempering concrete shall not be permitted. The cement shall be added to the mixer at the job site whenever this condition cannot be met. Concrete shall not be mixed or placed when the daily minimum atmospheric temperature is, or is expected to be, less than 40 degrees Fahrenheit unless adequate provisions are made to protect the concrete.

Concrete shall be placed to avoid segregation. High-frequency internal vibrators shall be used for compacting concrete in the forms. Vibrators shall be operated to produce concrete free of voids, but shall not be held so long in one place as to result in segregation or formation of laitance on the surface.

3.2 – Curing Concrete. All concrete will be cured a minimum of 7 days or, if high early strength cement is used, a minimum of 3 days. Concrete shall be cured with a waterproof membrane or other method approved by the Engineer.

3.3 – Finishing. All exposed surfaces shall be troweled and given a light broomed finish.

Holes produced by removal of form ties shall be filled with dry-pack mortar or other approved patching compounds.

3.4 – Reinforcing steel shall be deformed steel bars conforming to ASHTO M 31.

Reinforcing steel shall be clean and free of rust.

100-2

3.5 – The width of the trench shall be sufficient to permit satisfactory jointing and thorough tamping of the bedding material under and around the concrete spillway. The bedding surface shall provide a firm foundation of uniform density throughout the entire length of the spillway.

3.6 – The concrete spillway shall be bedded in an earth foundation of uniform density and carefully shaped, by means of a template supported at the desired grade to fit the lower part of the spillway exterior for at least 10% of its overall height.

Where a firm foundation is not encountered at the grade established, due to soft, spongy, or other unstable soil, all such unstable soil, all such unstable soil under the pipe and for at least one diameter on each side of the pipe shall be removed and replaced with other suitable selected material properly compacted to provide adequate support for the spillway.

3.7 – After the bedding has been prepared and the spillway installed,, selected material from excavation or borrow shall be placed alongside the spillway in layers not to exceed six inches in depth and compacted thoroughly so that on each side of the spillway there shall be a berm of thoroughly compacted material at least as wide as the external width of the exterior dimensions of concrete.

Each layer, if dry, shall be moistened and then compacted by rolling or by tamping with mechanical rammers, or by hand tamping with heavy iron tamps, the tamping faces of which shall not exceed 25 square inches in area, special care being taken to compact the fill thoroughly under the spillway. This method of filling and compacting shall be continued until the embankment has reached an elevation of the top of spillway.

4.1 – There will be no direct measurement of materials or work performed under this item.

PAYMENT

5.1 – Payment shall be lump sum which constitutes full payment for the furnishing of all materials, labor, equipment and incidentals necessary to complete this item as specified and as shown on drawings.

100-1 Water control structure Lump sum

100-3

ITEM 132

ACCESS ROAD

1.1 – This work shall consist of furnishing all equipment, materials, and labor to complete the access road in accordance with the drawings and specifications. Items of work include: clearing and grubbing, excavation, pipe culverts, surfacing, seeding and mulching, and final blading.

THIS SECTION IS FOR PROVINCE POND DAM CONSTRUCTION ONLY: Little, or minor access road work is required for use of ATV's and trailers to access the project. For light truck borrow&/or/rock placement, bridge removal/replacement, temporary culvert installation, and/or additional bridge support will be needed. Erosion and sediment control measures may need to be installed at selected locations.

Only the minimal work needed to provide adequate and safe access to the project is required.

Upon completion of the dam, the access road (which is…