ATTACHMENT 2.docx

ATTACHMENT 2

CONSTRUCTION AND MATERIAL

SPECIFICATIONS

Construction Specification 2—Clearing and Grubbing

1. Scope The work consists of clearing and grubbing and disposal of trees, snags, logs, brush, stumps, shrubs, and rubbish from the designated areas.

2. Protection of existing vegetation Trees and other vegetation designated to remain undisturbed shall be protected from damage throughout the duration of the construction period. Any damages resulting from the contractor's operations or neglect shall be repaired by the contractor.

Earthfill, stockpiling of materials, vehicular parking, and excessive foot or vehicular traffic shall not be allowed within the drip line of vegetation designated to remain in place. Vegetation damaged by any of these or similar actions shall be replaced with viable vegetation of the same species, similar condition, and like size unless otherwise approved by the contracting officer.

Any cuts, skins, scrapes, or bruises to the bark of the vegetation shall be carefully trimmed and local nursery accepted procedures used to seal damaged bark.

Any limbs or branches 0.5 inch or larger in diameter that are broken, severed, or otherwise seriously damaged during construction shall be cut off at the base of the damaged limb or branch flush with the adjacent limb or tree trunk. All roots 1-inch or larger in diameter that are cut, broken, or otherwise severed during construction operations shall have the end smoothly cut perpendicular to the root. Roots exposed during excavation or other operations shall be covered with moist earth or backfilled as soon as possible to prevent the roots from drying out.

3. Marking The limits of the area(s) to be cleared and grubbed will be marked by stakes, flags, tree markings, or other suitable methods. Trees to be left standing and uninjured will be designated by special markings placed on the trunk about 6 feet above the ground surface.

4. Clearing and grubbing All trees not marked for preservation and all snags, logs, brush, stumps, shrubs, rubbish, and similar materials shall be cleared from within the limits of the designated areas. Unless otherwise specified, all stumps, roots, and root clusters that have a diameter of 1 inch or larger shall be grubbed out to a depth of at least 2 feet below subgrade for concrete structures and 1 foot below the ground surface at embankment sites and other designated areas.

RI – Confluence of Pawtuxet and Pocasset Floodplain Restoration (210-VI-NEH, May 2001) 2-1

5. Disposal All materials cleared and grubbed from the designated areas shall be disposed of at locations shown on the drawings or in a manner specified in section 7. The contractor is responsible for complying with all local rules and regulations and the payment of any and all fees that may result from disposal at locations away from the project site.

6. Measurement and payment Method 1—For items of work for which specific units prices are established in the contract, the cleared and grubbed area is measured to the nearest 0.1 acre. Payment for clearing and grubbing is made for the total area within the designated limits at the contract unit price. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific unit prices are established in the contract, the length of the cleared and grubbed area is measured to the nearest full station (100 feet) along the line designated on the drawing or identified in the specifications. Payment for clearing and grubbing is made for the total length within the designated limits at the contract unit price. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 3—For items of work for which specific unit prices are established in the contract, each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet are measured before removal. The size of each tree and snag is determined by measuring its trunk at breast height above the natural ground surface. The size of each log is determined by measuring the butt and by measuring its length from butt to tip. The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

Payment for clearing and grubbing of each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet or larger is made at the contract unit price for its size designation as determined by the following schedule:

The sum of such payments shall constitute full compensation for clearing and grubbing (including the clearing and grubbing of smaller trees, stumps, snags, logs, brush, shrubs, and roots), applicable permits and associated fees, and rubbish removal. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 4—For items of work for which specific lump sum prices are established in the contract, payment for clearing and grubbing is made at the contract lump sum price. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment. Compensation for any item of work described in the contract, but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in section 7.

7. Items of work and construction details

Items of work to be performed in conformance with this specification and the construction details therefore are:

a. Bid Item 3, Clearing and Grubbing

(1) This item shall consist of removal of vegetation from the areas required to complete construction of the access route, staging area (as required) and excavation activities. Grubbing will be required only in areas where excavation will be conducted; stumps in access/staging areas shall be cut flush to the ground.

(2) Brush and trees shall be chipped on site and spread in layers over disturbed areas not more than one (1) inch thick prior to site restoration (final grading and seeding). Stumps shall be buried in excavation areas in pits containing not more than five (5) stumps each.

(3) Section 6, Measurement and Payment, Method 4 shall apply.

Construction Specification 5—Pollution Control

1. Scope The work consists of installing measures or performing work to control erosion and minimize the production of sediment and other pollutants to water and air from construction activities.

2. Material All material furnished shall meet the requirements of the material specifications listed in section 8 of this specification.

3. Erosion and sediment control measures and works The measures and works shall include, but are not limited to, the following:

Staging of earthwork activities—The excavation and moving of soil materials shall be scheduled to minimize the size of areas disturbed and unprotected from erosion for the shortest reasonable time.

Seeding—Seeding to protect disturbed areas shall occur as soon as reasonably possible following completion of that earthwork activity.

Mulching—Mulching to provide temporary protection of the soil surface from erosion.

Diversions—Diversions to divert water from work areas and to collect water from work areas for treatment and safe disposition. They are temporary and shall be removed and the area restored to its near original condition when the diversions are no longer required or when permanent measures are installed.

Stream crossings—Culverts or bridges where equipment must cross streams. They are temporary and shall be removed and the area restored to its near original condition when the crossings are no longer required or when permanent measures are installed.

Sediment basins—Sediment basins collect, settle, and eliminate sediment from eroding areas from impacting properties and streams below the construction site(s). These basins are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Sediment filters—Straw bale filters or geotextile sediment fences trap sediment from areas of limited runoff. Sediment filters shall be properly anchored to prevent erosion under or around them. These filters are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Waterways—Waterways for the safe disposal of runoff from fields, diversions, and other structures or measures. These works are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Other—Additional protection measures as specified in section 8 of this specification or required by Federal, State, or local government.

4. Chemical pollution The contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to collect and temporarily contain chemical pollutants, such as drained lubricating or transmission fluids, grease, soaps, concrete mixer washwater, or asphalt, produced as a by-product of the construction activities. Pollutants shall be disposed of in accordance with appropriate State and Federal regulations. At the completion of the construction work, tanks, barrels, and sumps shall be removed and the area restored to its original condition as specified in section 8 of this specification. Sump removal shall be conducted without causing pollution.

Sanitary facilities, such as chemical toilets, or septic tanks shall not be located next to live streams, wells, or springs. They shall be located at a distance sufficient to prevent contamination of any water source. At the completion of construction activities, facilities shall be disposed of without causing pollution as specified in section 8 of this specification.

5. Air pollution The burning of brush or slash and the disposal of other materials shall adhere to state and local regulations.

Fire prevention measures shall be taken to prevent the start or spreading of wildfires that may result from project activities. Firebreaks or guards shall be constructed and maintained at locations shown on the drawings.

All public access or haul roads used by the contractor during construction of the project shall be sprinkled or otherwise treated to fully suppress dust. All dust control methods shall ensure safe construction operations at all times. If chemical dust suppressants are applied, the material shall be a commercially available product specifically designed for dust suppression and the application shall follow manufacturer's requirements and recommendations. A copy of the product data sheet and manufacturer's recommended application procedures shall be provided to the engineer 5 working days before the first application.

6. Maintenance, removal, and restoration All pollution control measures and temporary works shall be adequately maintained in a functional condition for the duration of the construction period. All temporary measures shall be removed and the site restored to near original condition.

7. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each item is measured to the nearest unit applicable. Payment for each item is made at the contract unit price for that item. For water or chemical suppressant items used for dust control for which items of work are established in section 8 of this specification, measurement for payment will not include water or chemical suppressants that are used inappropriately or excessive to need. Such payment will constitute full compensation for the completion of the work.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds and supported by invoices presented by the contractor that reflect actual costs. If the total of all progress payments is less than the lump sum contract price for this item, the balance remaining for this item will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment will be prorated and provided in equal amounts on each monthly progress payment estimate. The number of months used for prorating shall be the number estimated to complete the work as outlined in the contractor's approved construction schedule. The final month's prorate amount will be provided with the final contract payment. Payment as described will constitute full compensation for completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment. Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items, and the items to which they are made subsidiary, are identified in section 8 of this specification.

Chapter 2 National Standard Construction Specifications Part 642 National Engineering Handbook

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8. Items of work and construction details

Items of work to be performed in conformance with this specification and the construction details therefore are:

a. The contractor shall not be allowed to dispose of pollutants (chemicals, chemical wastes, lubricants, soaps, etc.) on site. All such materials shall be removed from the site to an approved waste disposal site or recycling center. It shall be the contractor’s responsibility to adhere to all federal, state, county and town rules and regulations regarding the disposal of pollutants.

b. If chemical dust suppressants are applied, they shall not be petroleum-based.

c. All fueling, equipment maintenance etc. shall be performed and/or located in on-site areas established for such purposes with spill control supplies ready for deployment, or at the wastewater treatment facility entrance in a manner that does not obstruct normal traffic flow to the facility. Sanitary facilities shall be located adjacent to the paved access drive from the treatment facility to the floodplain area.

d. In Section 6, Measurement and Payment, provisions shall be as follows:

(1) For items of work for which specific unit prices are established in the contract, the quantity of work will be measured for payment. The quantity for the wattles will be determined by measuring to the nearest foot, the linear feet along which each section of wattles are installed.

Payment will be made at the contract unit price for each item of work. Such payment will constitute full compensation for completion of the work. Compensation for any item of work described in the contract but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary, if any, are identified in Section 6

e. Bid Item 2, Pollution Control

(1) This item shall consist of furnishing, installing, maintaining and removing temporary controls as may be deemed necessary to control erosion and sedimentation at the site. Also included is the spreading in place of any accumulated sediment upon stabilization of all disturbed areas.

(2) Erosion and sediment control measures and works - The measures and works shall include, but are not limited to, the following:

i. Wattles – Wattles shall be installed as shown on the drawings. Install and maintain as shown on the drawing and per the manufacturer’s instructions.

(3) In Section 2, Material, Wattles shall be SedimentSTOP as manufactured by North American Green or approved equal having the following minimum properties.

i. Comprised of top and bottom layer of leno-woven, 100% biodegradable, natural, organic fiber having a weight of 9.3 lbs/100 ft2.

ii. Matrix layer comprised of 70% straw fiber, 1.225 lbs/yd2, 30% coconut fiber, 0.525 lbs/yd2 allowing the passage of water but retaining soil particles.

(4) Material Submittals – Submit product data for the following:

i. Wattles

(5) Also included in this item are other sedimentation and erosion control devices, installed, maintained and removed including removal of any accumulated sediment.

(6) All works shall be maintained in accordance with the drawings.

(7) This item also includes furnishing and maintaining sanitary facilities.

(8) Section 7, Measurement and Payment, Method 1 shall apply. Payment shall be made per linear foot of erosion controls actually installed.

Construction Specification 6—Seeding, Sprigging, and Mulching

1. Scope The work consists of preparing the area for treatment; furnishing and placing seed, sprigs, mulch, fertilizer, inoculant, lime, and other soil amendments; and anchoring mulch in designated areas as specified.

2. Material Seed—All seed shall conform to the current rules and regulations of the state where it is being used and shall be from the latest crop available. It shall meet or exceed the standard for purity and germination listed in section 7.

Seed shall be labeled in accordance with the state laws and the U.S. Department of Agriculture rules and regulations under the Federal Seed Act in effect on the date of invitations for bids. Bag tag figures are evidence of purity and germination. No seed will be accepted with a test date of more than 9 months before the delivery date to the site.

Seed that has become wet, moldy, or otherwise damaged in transit or storage will not be accepted. The percent of noxious weed seed allowable shall be as defined in the current State laws relating to agricultural seeds. Each type of seed shall be delivered in separate sealed containers and fully tagged unless exception is granted in writing by the contracting officer.

Fertilizer—Unless otherwise specified, the fertilizer shall be a commercial grade fertilizer. It shall meet the standard for grade and quality specified by State law. Where fertilizer is furnished from bulk storage, the contractor shall furnish a supplier's certification of analysis and weight. When required by the contract, a representative sample of the fertilizer shall be furnished to the contracting officer for chemical analysis.

Inoculants—The inoculant for treating legume seeds shall be a pure culture of nitrogen-fixing bacteria prepared specifically for the species and shall not be used later than the date indicated on the container or as otherwise specified. A mixing medium, as recommended by the manufacturer, shall be used to bond the inoculant to the seed. Two times the amount of the inoculant recommended by the manufacturer shall be used except four times the amount shall be used when seed is applied using a hydraulic seeder. Seed shall be sown within 24 hours of treatment and shall not remain in the hydraulic seeder longer than 4 hours.

Lime and other soil amendments—Lime shall consist of standard ground agriculture limestone, or approved equivalent. Standard ground agriculture limestone is defined as ground limestone meeting current requirements of the State Department of Agriculture. Other soil amendments shall meet quality criteria and application requirements specified in section 7.

Mulch tackifiers—Asphalt emulsion tackifiers shall conform to the requirements of ASTM D 977, Specification for Emulsified Asphalt. The emulsified asphalt may be rapid setting, medium setting, or slow setting. Nonasphaltic tackifiers required because of environmental considerations shall be as specified in section 7.

Straw mulch material—Straw mulch shall consist of wheat, barley, oat or rye straw, hay, grass cut from native grasses, or other plants as specified in section 7. The mulch material shall be air-dry, reasonably light in color, and shall not be musty, moldy, caked, or otherwise of low quality. The use of mulch that contains noxious weeds is not permitted. The contractor shall provide a method satisfactory to the contracting officer for determining weight of mulch furnished.

Other mulch materials—Mulching materials, such as wood cellulose fiber mulch, mulch tackifiers, synthetic fiber mulch, netting, and mesh, are other mulching materials that may be required for specialized locations and conditions. These materials, when specified, must be accompanied by the manufacturer's recommendations for methods of application.

3. Seeding mixtures, sod, sprigs, and dates of planting The application rate per acre for seed mixtures, sprigs, or sod and date of seeding or planting shall be as shown on the plans or as specified in section 7.

4. Seedbed preparation and treatment Areas to be treated shall be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed shall be adequately loosened (4 to 6 inches deep) and smoothed. Depending on soil and moisture conditions, disking or cultipacking, or both, may be necessary to properly prepare a seedbed. Where equipment cannot operate safely, the seedbed shall be prepared by hand methods by scarifying to provide a roughened soil surface so that broadcast seed will remain in place.

If seeding is to be accomplished immediately following construction operations, seedbed preparation may not be required except on a compacted, polished, or freshly cut soil surface.

Rocks larger than 6 inches in diameter, trash, weeds, and other debris that will interfere with seeding or maintenance operations shall be removed or disposed of as specified in section 7.

Seedbed preparation shall be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the contracting officer's technical representative (COTR).

5. Seeding, sprigging, fertilizing, mulching, and stabilizing

All seeding or sprigging operations shall be performed in such a manner that the seed or sprigs are applied in the specified quantities uniformly in the designated areas. The method and rate of seed application shall be as specified in section 7. Unless otherwise RI – Confluence of Pawtuxet and Pocasset Floodplain Restoration (210-VI-NEH, January 2009) 6-9 specified, seeding or sprigging shall be accomplished within 2 days after final grading is completed and approved.

Fertilizer, lime, and other soil amendments shall be applied as specified in section 7. When specified, the fertilizer and soil amendments shall be thoroughly incorporated into the soil immediately following surface application.

The rate, amount, and kind of mulching or mesh shall be as specified in section 7. Mulches shall be applied uniformly to the designated areas. They shall be applied to areas seeded not later than 2 working days after seeding has been performed. Straw mulch material shall be stabilized within 24 hours of application using a mulch crimper or equivalent anchoring tool or by a suitable tackifier. When the mulch crimper or equivalent anchoring tool is used, it shall have straight blades and be the type manufactured expressly for and capable of firmly punching the mulch into the soil. Where the equipment can be safely operated, it shall be operated on the contour. Hand methods shall be used where equipment cannot safely operate to perform the work required.

The tackifier shall be applied uniformly over the mulch material at the specified rate, or it shall be injected into the mulch material as it is being applied. Mesh or netting stabilizing materials shall be applied smoothly, but loosely on the designated areas. The edges of these materials shall be buried or securely anchored using spikes or staples as specified in section 7.

The contractor shall maintain the mesh or netting areas until all work under the contract has been completed and accepted. Maintenance shall consist of the repair of areas damaged by water erosion, wind, fire, or other causes. Such areas shall be repaired to reestablish the intended condition and to the design lines and grades required by the contract. The areas shall be refertilized, reseeded, and remulched before the new application of the mesh or netting.

6. Measurement and payment

Method 1—For items of work for which specific unit prices are established in the contract, each area treated is measured as specified in section 7 and the area calculated to the nearest 0.1 acre. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

When specified as an item of work, mesh or netting is measured to the nearest square yard of surface area covered and accepted. Payment is made at the contract unit price and will constitute full compensation for completion of the work.

Method 2—For items of work for which specific lump sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump sum price for the item and will constitute full compensation for the completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds. Progress payments will be determined as specified in section 7. Payment of the lump sum contract price will constitute full compensation for completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment. Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and the item(s) to which they are made subsidiary are identified in section 7.

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7. Items of work and construction details Items of work to be performed in conformance with this specification and the construction details are:

a. Contractor shall provide a 12-month guarantee following Substantial Completion for successful establishment of stable and thorough vegetated surfaces over seeded areas. Care and maintenance shall be provided following seeding to monitor and apply water as necessary to establish grass. Eroded areas or other areas where seed has been washed away before germination shall be repaired and reseeded to support establishment of grass.

b. Contractor shall complete seeding within the required seasonal dates. If the contractor believes that seeding will be required outside of such periods, notice shall be indicated in writing to the contracting officer’s technical representative immediately upon such determination, and a recommended seeding and stabilization plan shall be prepared and transmitted with notice for review and approval. Such plan shall indicate in detail contractor’s proposed measures to be employed to protect the site and establish stable vegetation addressing specific conditions not conducive to plant growth outside the allowed seeding/planting windows. Such notice or plan will not relieve the contractor of its obligations under the 12-month guarantee period, with the sole exception that such period shall commence upon the date of seeding or planting, where such date(s) occur following Substantial Completion.

c. The Contractor shall seed Between September 15 and October 1. If construction is not complete until after October 1, Annual Rye Grass shall be applied at a rate of 40 lbs/acre and remaining seed (secondary seeding) shall be applied between November 15 - December 1 (dormant seeding season) at the application rates specified on the plans. Secondary Seeding shall not include Rye Grass. Secondary seeding shall consist of Wetland Seed.

d. Bid Item 7, Site and Access Route Restoration

(1) This item shall consist of uniformly grading all disturbed areas to no greater than 4 (horizontal) : 1 (vertical) slopes, dressing topsoil over access routes and seeding all disturbed areas as shown on the drawings. The areas will be restored to original grades and appearance (any ruts and excavated areas will be filled with topsoil, all stockpiled materials will be removed, etc.).

(2) After final completion, stone remaining above adjacent grades along the access route shall be removed and disposed off-site. Topsoil shall be dressed to a depth of one inch over the access route crushed stone layer following removal of stone above adjacent grades. Topsoil shall consist of organic soil, approved by the contracting officer’s technical representative, from on-site excavation areas.

(1) In section 2, Material, Seed mix shall be as shown on the drawings or equal, proving the same seed species and meeting the maximum percentages of the following selected seed species in each mix

· Wetland Seed Mix

· Virginia Wild Rye – Max 25%

· Creeping Red Fescue – Max 24%

· Blue Vervain – Max 1%

· Sensitive Fern – Max 1%

(3) Material Submittals – Certify that seed and soil amendments adhere to the requirements of this specification and drawings.

i. Seed mixes

ii. Fertilizers, hydromulch, lime and other soil amendments, as recommended by UMASS

iii. Fertilizer

(4) The seedbed shall be adequately loosened (1 to 2 inches deep) and smoothed using typical agricultural equipment.

(5) Soil Amendments per 1,000 square feet shall be applied based upon UMass Soil Testing Laboratory recommendations: At least 40% of the recommended nitrogen shall be in organic or slow release form.

i. Lime, if recommended from UMASS testing, shall conform to the requirements of Subsection M.18.05 of the RI Department of Transportation Standard Specifications and meet recommendations from the UMASS testing. Liquid lime shall not be allowed.

ii. Fertilizer, if recommended from UMASS testing, shall conform to the requirements of Subsection M.18.06 of the RIDOT Standard Specifications and meet recommendations from the UMASS testing.

iii. Wood fiber mulch shall be Weyerhaeuser Silva-Fiber Mulch or approved equal.

iv. The tackifier product shall be Environmental Soil Systems, Inc. Soilmaster WR or approved equal.

(6) Apply seed to topsoil surface by hydroseeding. Seed the area with the seed mixes shown on the drawings.

(7) Section 6, Measurement and Payment, Method 1 shall apply.

Construction Specification 7—Construction Surveys

1. Scope The work consists of performing all surveys, measurements, and computations required by this specification.

2. Equipment and material Equipment for construction surveys shall be of a quality and condition to provide the required accuracy. The equipment shall be maintained in good working order and in proper adjustment at all times. Records of repairs, calibration tests, accuracy checks, and adjustments shall be maintained and be available for inspection by the engineer. Equipment shall be checked, tested, and adjusted as necessary in conformance with manufacturer's recommendations.

Material is field notebooks, stakes, templates, platforms, equipment, spikes, steel pins, tools, and all other items necessary to perform the work specified.

3. Quality of work All work shall follow recognized professional practice and the standards of the industry unless otherwise specified in section 9 of this specification. The work shall be performed to the accuracy and detail appropriate for the type of job. Notes, sketches, and other data shall be complete, recorded neatly, legible, reproducible and organized to facilitate ease in review and allow reproduction of copies for job documentation. Survey equipment that requires little or no manual recording of field data shall have survey information documented as outlined in section 9 of this specification.

All computations shall be mathematically correct and shall include information to identify the bid item, date, and who performed, checked, and approved the computations. Computations shall be legible, complete, and clearly document the source of all information used including assumptions and measurements collected.

If a computer program is used to perform the computations, the contractor shall provide the engineer with the software identification, vendor's name, version number, and other pertinent data before beginning survey activities. Computer generated computations shall show all input data including values assigned and assumptions made.

The elevations of permanent and temporary bench marks shall be determined and recorded to the nearest 0.01 foot. Differential leveling and transit traverses shall be of such precision that the error of vertical closure in feet shall not exceed plus or minus 0.1 times the square root of the traverse distance in miles. Linear measurements shall be accurate to within 1 foot in 5,000 feet, unless otherwise specified in section 9 of this specification. The angular error of closure for transit traverses shall not exceed 1 minute times the square root of the number of angles turned.

The minimum requirements for placing slope stakes shall be at 100-foot stations for tangents, as little as 25 feet for sharp curves, breaks in the original ground surface and at any other intermediate stations necessary to ensure accurate location for construction layout and measurement. Slope stakes and cross sections shall be perpendicular to the centerline. Significant breaks in grade shall be determined for cross sections. Distances shall be measured horizontally and recorded to the nearest 0.1 foot. Side shots for interim construction stakes may be taken with a hand level.

Unless otherwise specified in section 9 of this specification, measurements for stationing and establishing the location of structures shall be made to the nearest 0.1 foot.

Elevations for concrete work, pipes, and mechanical equipment shall be determined and recorded to the nearest 0.01 foot. Elevations for earth work shall be determined and recorded to the nearest 0.1 foot.

4. Primary control The baselines and bench marks for primary control, necessary to establish lines and grades needed for construction, are shown on the drawings and have been located on the job site.

These baselines and bench marks shall be used as the origin of all surveys, layouts, and measurements to establish construction lines and grades. The contractor shall take all necessary precautions to prevent the loss or damage of primary control points. Any stakes or control points lost or damaged by construction activity will be reestablished by the contractor or at contractor expense.

5. Construction surveys Before work starts that requires contractor performed surveys, the contractor shall submit in writing for the engineer's review: the name, qualifications, and experience of the individuals to be assigned to the survey tasks.

Method 1—Contractor performed surveys shall include:

Method 2—Contractor performed surveys shall consist of all work necessary for:

Method 3—Contractor performed surveys shall consist of all work necessary for:

6. Staking The construction staking required for the item shall be completed before work on any item starts. Construction staking shall be completed as follows or as otherwise specified in section 9 of this specification:

Clearing and grubbing—The boundary of the area(s) to be cleared and grubbed shall be staked or flagged at a maximum interval of 200 feet, closer if needed, to clearly mark the limits of work. When contractor staking is the basis for determining the area for final payment, all boundary stakes will be reviewed by the engineer before start of this work item.

Excavation and fill—Slope stakes shall be placed at the intersection of the specified slopes and ground line. Slope stakes and the reference stakes for slopes shall be marked with the stationing, required cut or fill, slope ratio, and horizontal distance from the centerline or other control line. The minimum requirements for placing slope stakes is outlined in section 3, Quality of work.

Structures—Centerline and offset reference line stakes for location, alignment, and elevation shall be placed for all structures.

7. Records All survey data shall be recorded in fully identified standard hard-bound engineering survey field notebooks with consecutively numbered pages. All field notes and printed data shall include the purpose or description of the work, the date the work was performed, weather data, sketches, and the personnel who performed and checked the work. Electronically generated survey data and computations shall be bound, page numbered, and cross referenced in a bound field notebook containing the index for all survey activities. All work shall follow recognized professional practice.

The construction survey records shall be available at all times during the progress of the work for examination and use by the engineer and when requested, copies shall be made available. The original field notebooks and other records shall be provided to and become the property of the owner before final payment and acceptance of all work.

Complete documentation of computations and supporting data for progress payments shall be submitted to the engineer with each invoice for payment as specified in section 9 of the specification. When the contractor is required to conduct initial and final surveys as outlined in section 5, Construction Surveys, notes shall be provided as soon as possible after completion to the engineer for the purpose of determining final payment quantities.

8. Payment

Method 1—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds, after presentation of correct and accurate invoices by the contractor showing related costs and evidence of the charges of suppliers, subcontractors, and others for supplies furnished and work performed. Invoices for the total amount of the contract price will not be accepted until all surveys are complete and required documentation has been determined complete. If the total of such payments is less than the lump sum contract price for this item, the unpaid balance will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of all work under the bid item.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds with progress payment amounts determined as a percentage of the total work planned as projected from the contractor's approved construction schedule. Payment of the lump sum contract price will constitute full compensation for completion of all work under this bid item.

All Methods—Payment will not be provided under this item for the purchase price of materials or equipment having a residual value.

Compensation for any item of work described in the contract, but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the item to which they are made subsidiary are identified in section 9 of this specification.

Chapter 2 National Standard Construction Specifications Part 642 National Engineering Handbook

Items of work to be performed in conformance with this specification and the construction details therefore are:

a. Submittals

1. Records, as stated in Section 7 of this specification.

b. Contractor-performed surveys shall consist of all work necessary for establishing line and grade for all work and staging areas.

c. Bid Item 9, Construction Survey and Layout

(1) This item shall consist of performing all surveys and layout staking necessary and incidental to the completion of the works of improvements as shown on the drawings.

(2) One copy of all survey data, field notes and printed data shall be submitted to the contracting officer’s technical representative within 7 working days after a particular survey is completed.

(3) The location of existing benchmarks are shown on the drawings and flagged in the field.

(4) All survey work shall be performed by qualified survey personnel under the direction of a registered land surveyor registered or registered professional engineer in the State of Rhode Island.

(5) The contractor shall coordinate all survey with the contracting officer’s technical representative.

(6) The contractor shall be responsible for establishing centerlines, slope stakes, offset control stakes, grade nails, batter boards, and any other alignment or control point which shall be necessary to ensure the integrity, location, and/or size of the completed works of improvement. The contractor shall closely coordinate survey layouts and slope staking surveys with the contracting officer’s technical representative.

(7) Prior to submitting the final invoice, the contractor shall provide the original bound field survey notebooks and related documentation to the owner (via the contracting officer’s technical representative) for review and acceptance.

(8) The contractor shall be responsible for the calculations of all quantities for payment estimates. No payment shall be made until calculations have been reviewed, checked, and accepted by the contracting officer’s technical representative.

(9) The contractor shall be responsible for accurately locating and marking easement boundary lines where the proposed work will occur prior to any other work starting. Contractor shall also replace existing easement boundary signs in same locations as they now exist.

(10) One copy of certified payment estimate documentation or computations and supporting data for progress payment shall be attached to each invoice for payment.

(11) The contractor shall be responsible for submitting redline record drawings. Record drawings shall consist of a redlined set of construction drawings Spot elevations and one-foot contour intervals of graded areas shall be recorded on record drawings in areas where excavation activities occurred.

(12) Construction Survey Record Documents - Submit the following for record documents:

i. Mark Record Prints to show the actual installation where installation varies from that shown originally.

ii. Give particular attention to information on concealed elements that cannot be readily identified and recorded later.

iii. Accurately record information in an understandable drawing technique.

iv. Record data as soon as possible after obtaining it. Record and check the markup before enclosing concealed installations.

v. Mark record sets with erasable, red-colored pencil. Use other colors to distinguish between changes for different categories of the Work at the same location.

vi. Mark important additional information that was either shown schematically or omitted from original Drawings.

vii. Note Work Change Directive numbers, Change Order numbers, alternate numbers, and similar identification where applicable.

viii. Identify and date each Record Drawing; include the designation "PROJECT RECORD DRAWING" in a prominent location. Organize into manageable sets; bind each set with durable paper cover sheets. Include identification on cover sheets.

ix. Use qualified engineering or survey personnel to provide the following as-built information.

A. Horizontal limits of excavation activities, access route and staging area(s).

B. Spot and contours in excavated areas or areas otherwise regraded by construction or restoration activities.

C. Location of subsurface piping identified with the wastewater treatment facility operator.

(13) Section 5, Construction Survey, Method 2 shall apply.

(14) Section 8, Payment, Method 2 shall apply.

Construction Specification 8—Mobilization and Demobilization

1. Scope The work consists of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

2. Equipment and material Mobilization shall include all activities and associated costs for transportation of contractor's personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary general facilities for the contractor's operations at the site; premiums paid for performance and payment bonds including coinsurance and reinsurance agreements as applicable; and other items specified in section 4 of this specification.

Demobilization shall include all activities and costs for transportation of personnel, equipment, and supplies not required or included in the contract from the site; including the disassembly, removal, and site cleanup of offices, buildings, and other facilities assembled on the site specifically for this contract.

This work includes mobilization and demobilization required by the contract at the time of award. If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the item or items of work changed or added.

3. Payment Payment will be made as the work proceeds, after presentation of paid invoices or documentation of direct costs by the contractor showing specific mobilization and demobilization costs and supporting evidence of the charges of suppliers, subcontractors, and others. When the total of such payments is less than the lump sum contract price, the balance remaining will be included in the final contract payment. Payment of the lump sum contract price for mobilization and demobilization will constitute full compensation for completion of the work.

Payment will not be made under this item for the purchase costs of materials having a residual value, the purchase costs of materials to be incorporated in the project, or the purchase costs of operating supplies.

Items of work to be performed in conformance with this specification and the construction details therefore are:

a. Bid Item 1, Mobilization and Demobilization

(1) The contractor is responsible for verifying existence and location of utilities and is liable for any damage by construction activity. Utility locations, if shown, are only approximate. Additional utilities may exist even though not shown.

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b. Bid Item 8, Access Route and Staging Area Construction

(1) The contractor shall excavate, grade, and maintain an access route as required for proposed excavation on site and transportation of materials from the site.. Such route shall be adequately constructed to support all fully loaded equipment without presenting a hazard to same or causing excessive erosion or sedimentation. Route shall be protected and maintained during the work as required for all required vehicle and equipment access to safely transport materials to final locations and complete the work in accordance with respective drawings and specifications for the proposed stabilization measures.

(2) Where access route is directed through areas of phragmites, a layer of filter fabric shall be used under the Geogrid.

(3) In section 2, Equipment and Material, Geotextile Filter Fabric shall meet the requirements of Material Specification 592 - Geotextile.

(4) In section 2, Equipment and Material, the Crushed Stone material shall be free of all debris, garbage and vegetative matter, and shall conform to the requirements of State of Rhode Island DOT Standard Specifications, Column II of Table I in Section M.01.09 – Crushed Stone, except that no stone shall pass the 1½” sieve and the maximum stone size shall be 3”.

(5) In section 2, Equipment and Material, the Geogrid shall be Tensar Triax TM TX140 or approved equal with the following properties:

i. manufactured from a punched polypropylene sheet which is then orientated in three substantially equilateral directions so that the resulting ribs shall have a high degree of molecular orientation, which continues at least in part through the mass of the integral node.

ii. Maximum opening dimension: 1¼”

iii. Aperture stability – 93 kg-cm/deg @ 5.0kg-cm

iv. Radial Stiffness at low strain – 3.0 kN/m @ 5% strain

(6) Additional stone shall be placed as necessary during the course of construction to maintain stable access. Excess stone shall be removed and disposed off-site following construction activities and prior to site restoration.

(7) Pipe Crossings – The contractor shall field locate sewer pipes under the proposed access route in coordination with the wastewater treatment facility operator.