PRHTAs Project Specific Special Provisions.pdf

SP Specification Description Page

210 SOIL EROSION AND WATER POLLUTION CONTROL 2

603 PIPE CULVERTS AND STORM DRAINS 10

606 GUARDRAIL 18

620 TRAFFIC IMPACT ATTENUATORS 28

622 RIPRAP 44

903 FILTER FABRIC 53

910 BRIDGE TRANSITION UPGRADES AND TRANSITION MODULES 56

955 TEMPORARY AND MAILBOX ADJUSTMENTS 60

991 MECHANICALLY STABILIZED EARTH SLOPES 63

992 SPECIAL BORROW EMBANKMENT 67

PRHTA Special Provisions Index for PR ER DOT PRMNT RPR(13)

Revised September 14, 2018.

SPECIAL PROVISION

SPECIFICATION 210 – SOIL EROSION AND WATER POLLUTION CONTROL

210-1 DESCRIPTION

210-1.01 Scope - This work shall consist of providing temporary soil erosion and water pollution control measures as shown on the plans or as ordered by the Engineer. The control measure may include berms, dikes, check dams, silt fences, sediment basins, fiber mats, mulches, grasses, slope drains, temporary waterways, floating turbidity barrier and other erosion control devices or methods.

210-1.02 The temporary control measures contained herein shall be coordinated with the permanent erosion control features specified elsewhere in the contract, to the extent practical, to assure economical, effective and continuous erosion control throughout the construction and post construction period. Work under this specification will not be used and paid for in situations where permanent contract items can be practically installed at an early date in final position to provide the necessary erosion control measures.

210-1.03 This work includes the detailed planning of construction operations necessary for the preparation and submittal by the Contractor of an explicit erosion control plan and schedule to supplement the temporary and permanent erosion control measures shown on the plans which cannot be detailed without knowledge of the Contractor’s specific construction operations plan.

210-1.04 This work shall also include, when called for in the plans, the furnishing, placing and removing of floating turbidity barrier (FTB) to minimize transport and accomplish the isolation of disturbed materials as a result of bridge construction operations. This Item will govern for the furnishing of all labor, equipment and materials necessary to complete this work at the locations as shown on the construction plans, or as approved by the Engineer. The FTB must be manufactured in accordance with the following specification and the Floating Turbidity Barrier details shown on the project plans. The barrier and installation must be sufficient for a flow condition where the velocity of flow may reach 5 feet per second.

210-2 MATERIALS

210-2.01 The following materials shall conform to the applicable requirements of the specifications indicated below:

Material Specification

Geotextiles (Filter Fabrics)……… 712-7

Plastic Liner………………….….. 712-8

Lime……………………………... 713-2

Fertilizer…………………………. 713-3

Seed……………………………… 713-4

Mulches………………………….. 713-6

Jute Mesh……..…………………. 713-8

210-2.02 Straw or Hay Bales -Shall be rectangular, approximately one meter (3.3 feet) in length and weigh approximately 70 pounds.

210-2.03 Sandbags - Shall be canvas, burlap or other approved material. Sand filler shall be clean, silt free material approved by the Engineer. The sandbags shall contain a minimum of

0.014 cubic meters (0.5 cubic feet) of sand.

210-2.04 Riprap -Shall conform to the applicable requirements of Specification 622 - Riprap.

210-2.05 Culvert Pipe - Temporary culvert pipes used for diverting live streams through work areas shall be corrugated metal or plastic, concrete, or other approved material. Temporary pipes placed beneath traveled ways shall be capable of withstanding an H-20 loading on the roadway.

210-2.06 Slope Drains - Temporary slope drains shall be constructed of pipe, fiber mats, rubble, portland cement concrete, bituminous plant mix, plastic sheeting or other material shown on the plans, on the Contractor’s approved erosion control plan, or as ordered by the Engineer.

210-2.07 Other required materials shall meet the commercial grade standard for the particular product and require the Engineer’s approval before incorporating into the project.

210-2.08 Temporary Blanket – Temporary blanket (TB) is a degradable rolled erosion control product that is composed of an even distribution of natural or polymer fibers that are mechanically, structurally or chemically bound together to form a continuous mat. TB is stiffer, thicker and denser than an open-weave textile (OWT). These material properties improve erosion resistance.

210-2.09 Floating turbidity barrier (FTB) - The FTB supplied must be a standard manufactured product. All materials must be corrosion resistant. Materials at the water surface must not degenerate when exposed to sunlight, oils, and petroleum products. The manufacturer must supply a certification that the product supplied meets the requirements of this specification.

TABLE 210-1

PHYSICAL PROPERTIES OF TURBIDITY BARRIER FABRIC

Physical Property Minimum Requirement

Weight, oz. / sq. yd 22

Grab Tensile Strength, lbs 300 (ASTM D 4632-91)

Min. Ultraviolet Stability 70% (ASTM D 4355)

Maximum permeability < 1 x 10.7 cm/s (ASTM 4491)

Bottom section

(geo-synthetic): filtration

Apparent Opening Size

(AOS)

0.220 mm maximum for non-woven geotextiles, and

AOS of 0.425 mm maximum for woven textiles (ASTM D

4751-99a)

210-3 CONSTRUCTION REQUIREMENTS

210-3.01 General

a. In the event of conflict between these specification requirements and any pollution control laws, rules or regulations of other Federal, Commonwealth or local agencies, the more restrictive laws, rules or regulations shall apply.

b. At the pre-construction conference, prior to the start of construction work, the

Contractor shall submit to the Engineer for review and approval his proposed plan and schedule for the temporary and permanent erosion control work. The schedule shall detail the proposed coordination for accomplishing the temporary and permanent erosion control work in a timely and appropriate manner. No construction work shall be started until the schedule has been approved and the necessary controls installed as required for the particular operation to be in progress.

c. The Contractor shall incorporate all permanent erosion control features into the project at the earliest practical time in order to minimize the need for temporary erosion control measures and this should be reflected in his proposed schedule.

d. If the Engineer determines that the Contractor is not in compliance with the approved erosion control schedule, or field conditions warrant changes in the plan, the Contractor shall submit a revised schedule for performing erosion control work and no work contingent upon the revised schedule shall be continued or started until the revised plan has been approved.

e. Clearing and grubbing operations shall be so scheduled and performed that grading operations and permanent erosion control features can follow immediately thereafter if the project conditions permit; otherwise, temporary erosion control measures may be required between successive construction stages. Under no conditions shall the surface of the erodible earth material exposed at one time by clearing and grubbing exceed 70,000 square meters unless such areas are protected by adequate temporary erosion control measures approved by the

Engineer.

f. Excavation, borrow, and embankment operations shall also be scheduled and performed to permit permanent erosion control features to follow immediately thereafter if project conditions permit; otherwise, temporary erosion control measures may be required.

Under no conditions shall the surface area of erodible earth material exposed at one time by excavation, borrow, or fill exceed 70,000 square meters without the prior installation of adequate erosion control measures approved by the Engineer.

g. The Engineer has the authority to limit the surface area of erodible earth material exposed by clearing, grubbing, excavation, borrow and embankment construction operations in progress commensurate with the Contractor's capability and progress in keeping temporary erosion control measures and the finish grading, mulching, seeding and other such permanent erosion and pollution control measures current in accordance with the accepted schedule. The

Engineer has also the authority to increase or decrease the amount of surface area of erodible earth material to be exposed at any one time by clearing, grubbing, excavation, borrow and embankment construction operations as determined by his analysis and evaluation of existing project conditions.

h. The Engineer has the authority to direct the Contractor to immediately provide erosion control measures to prevent soil erosion that will adversely affect construction operations, SPECIFICATION 210 – SOIL EROSION AND WATER POLLUTION CONTROL damage adjacent properties, or cause contamination of adjacent streams, other watercourses, lakes, ponds or other areas of water impoundment. Such work may involve the construction of temporary berms, dikes, check dams, sediment basins, slope drains and use of temporary mulches, mats, seeding or other control devices or methods as necessary to control erosion.

i. In the event that temporary erosion and pollution 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 or as ordered by the Engineer, such work shall be performed by the

Contractor at no cost to the Government.

j. Temporary erosion and pollution control may include construction work outside the right-of-way where such work is necessary as a result of roadway construction operations. Any such work outside the project right-of-way shall be coordinated with the property owner.

k. The erosion control features installed by the Contractor shall be operated and maintained by the Contractor, at his expense, in an acceptable functional condition.

210-3.02 Erosion Check Dams - Erosion checks, constructed with hay or straw bales as specified, shall be staked in place as shown on the plans or where ordered installed by the

Engineer to act as erosion filters and barriers at the toe of fills, in ditches, at pipe inlets and outlets, or for other uses as directed.

210-3.03 Silt Fences - Silt fences shall be used for silt barriers, and shall be constructed in accordance with the details and at the locations shown on the plans or designated by the

Engineer, or as called for in the Contractor’s erosion control plan and schedule.

210-3.04 Sediment Containment Structures

a. Settling ponds, basins, dikes, dams or other such containment structures shall be constructed in accordance with the details shown on the plans, specified in the contract, or as directed by the Engineer.

b. Sedimentation structures shall remain in service until all disturbed areas draining into these structures have been satisfactorily stabilized. Disturbed areas shall be considered stabilized when all seeding items have been completed and accepted, and all drainage ditches or channels have been paved or satisfactorily lined. When use of temporary sediment structures is to be discontinued, all sediment accumulation shall be removed and disposed of, all excavations backfilled or otherwise graded and properly compacted, and the existing ground restored to its natural or intended final condition in a manner acceptable to the Engineer.

210-3.05 Diversion Channels -Temporary channels for diverting water around an area where a culvert is to be installed shall be lined with plastic film sheeting when so specified in the plans or ordered by the Engineer. The diversion channel shall be excavated to a depth and width adequate to accommodate stream flow during the period of culvert installation. The channel shall be reasonably smooth and free of sharp rocks, stones, roots or other projections that may puncture the plastic liner. No longitudinal seams will be permitted. Transverse seams, if necessary, shall be lapped a minimum of two feet in the direction of the flow. The liner shall be anchored in place using clean rock, gravel, or other methods approved by the Engineer.

SPECIFICATION 210 – SOIL EROSION AND WATER POLLUTION CONTROL

210-3.06 Earth Berms - Temporary earth berms shall be used for diverting or channeling runoff waters to slope drains, waterways, diversion ditches, sediment traps, or other uses as directed.

Earth berms shall be constructed in conformity with the dimensions shown on the plans and at the locations established by the Engineer or called for in the Contractor’s erosion control plan.

Material shall be reasonably nonporous and shall contain no roots, sod or other deleterious materials.

210-3.07 Slope Drains and Waterways - Temporary slope drains or waterways shall be constructed at the intervals and locations designated by the Engineer, or in the Contractor’s erosion control plan, for channeling runoff waters down embankment slopes. Slope drains shall be adequately anchored to the slopes and their outlets so placed and constructed as to prevent erosion. Waterways constructed down erodible slopes shall be lined with plastic sheeting.

Waterways constructed down slopes composed of rock where erosion will not occur need not be lined with plastic sheeting.

210-3.08 Turf Establishment - When it is not practical or not permitted to perform permanent turf establishment work under Specification 627, temporary seeding, fertilizing, liming and mulching will be applied under this specification. The applicable rates and types of materials for temporary turf establishment shall be as specified in the contract or as established by the

Engineer.

210-3.09 Cleanup - After the temporary erosion and pollution control installations are no longer required, the Contractor shall remove and dispose of all materials and restore the areas to their original or intended final appearance in a manner acceptable to the Engineer.

210-3.10 Temporary Blanket –The TB is placed in the channel or slope embankment parallel to the direction of the flow (where occurs) and secured with staples and by placement of the blanket into cutoff trenches. When TB are used and ultimately degrade, the long-term erosion protection is provided by the established vegetation.

210-3.11 Floating turbidity barrier (FTB) - Place the barrier prior to commencement of any work that could impact the area of concern. Ensure that the type of barrier used and the deployment and maintenance of the barrier will minimize dispersion of turbid water from the excavation and dredging area. Operate the turbidity barrier in such a manner to avoid or minimize the degradation of the water quality of surrounding waters. The barrier must have sufficient ballast to anchor the barrier along the channel bottom.

210-3.12 Sandbag Diversion Berms - A sandbag diversion berm is a series of sandbags placed on a level contour used for diverting or channeling runoff waters to slope drains, waterways, diversion ditches, sediment traps, or other uses as directed by the Engineer. Diversion berms shall be constructed in conformity with the dimensions shown on the plans and at the locations established by the Engineer or called for in the Contractor’s erosion control plan.

210-3.13 Silt Bag - A Silt bag is a woven polypropylene filter bag used for temporary inlet protection or other uses as directed by the Engineer. Silt bags shall be installed at the locations established by the Engineer or called for in the Contractor’s erosion control plan.

SPECIFICATION 210 – SOIL EROSION AND WATER POLLUTION CONTROL

Property Test Min. Roll Value

Grab Tensile, lbs ASTM-D-4632 310x300 lbs

Grab Elongation, % ASTM-D-4537 15%

Mullen Burst, psi ASTM-D-3786 650 psi

Puncture, lbs ASTM-D-4833 120 lbs

Trapezoid Tear, lbs ASTM-D-4533 125x150 lbs

UV Resistance, % SR ASTM-D-4355 90%

AOS, US Sieve ASTM-D-4751 40 Seive

Permittivity,(1/sec) Gal ASTM-D-4491 0.5 sec-1

Flow Rate ASTM-D-4491 40 gal/min/ft

210-4 METHOD OF MEASUREMENT

210-4.01 When the following components of temporary soil erosion and water pollution control work are included as separate pay items in the contract, they will be measured as follows:

a. Straw or hay bales will be measured by the number of individual bales furnished, installed and accepted.

b. Sand bags will be measured by the number of individual bags filled with sand furnished, installed and accepted.

c. Pipe slope drains will be measured by the linear meters of each type of drain pipe furnished, installed and accepted.

d. Paved or lined slope drains will be measured by the square meters of each type of paving or lining furnished, installed and accepted.

e. Earth berms will be measured by the linear meters of berm constructed to the dimensions shown on the plans, on the Contractor’s erosion control plan or ordered by the

Engineer and accepted.

f. Silt fences will be measured by the lineal meters of fence furnished, installed, maintained and accepted.

g. Plastic liners for use in diversion channels, and other soil erosion control structures will be measured by the square meters of liner furnished, installed and accepted.

h. Temporary Blanket will be measured by the square meters of blanket furnished, installed and accepted.

i. Floating turbidity barrier will be measured by the linear meters of barrier furnished, installed and accepted.

j. Diversion Berm will be measured by linear meters of barrier furnished, installed and accepted. PVC Liner shall be considered as subsidiary obligation and its cost included in

“Sandbag Diversion Berm” pay item.

k. Silt bags will be measured by the number of individual bags installed, furnished and accepted.

210-4.02 Diversion channels will be measured for payment as unclassified excavation by the cubic meter under the pay items and provisions of Specification 203 - Excavation and

Embankment.

SPECIFICATION 210 – SOIL EROSION AND WATER POLLUTION CONTROL

210-4.03 Turf establishment including temporary and permanent seeding, fertilizer, seed, mulch and jute mesh will be measured for payment under the applicable pay units and provisions of

Specification 627 - Turf Establishment.

210-4.04 The work and materials required for the construction of sediment containment structures will be measured for payment under the applicable pay units and provisions of

Specification 203 -Excavation and Embankment.

210-4.05 Riprap will be measured by the cubic meters of each type of specified riprap material furnished, installed and accepted under the pay items and provisions of Specification 622 -

Riprap.

210-4.06 Where a lump sum method of payment for soil erosion and water pollution control work is specified in the contract, no separate measurement for payment will be made of all the soil erosion and water pollution control items shown in the plans or designated in the contract documents and all of this work will be considered as a single unit.

210-4.07 No direct measurement and payment will be made for furnishing, installing and subsequently removing and disposing of temporary drainage structures, such as culvert pipe, used for diverting of live streams around or through work areas, but such work will be considered a subsidiary obligation of the Contractor.

210-4.08 Work which is subsidiary to other construction pay items included in the contract under their respective specifications will not be measured for direct payment under this specification.

210-5 BASIS OF PAYMENT

210-5.01 The accepted quantities, determined as provided in Articles 210-4.01 and 210-4.06 above, for the pay items listed in Article 5.05 below, which are included in the contract, will be paid for at the contract price per unit of measurement. Such price and payment shall constitute full compensation for furnishing, installing and maintaining all required materials, and for all labor, equipment, tools and incidentals necessary to complete the work as required by the plans and specifications.

210-5.02 When the temporary soil erosion and water pollution control work is paid for on a lump sum basis, monthly partial payments will be made for this item on the basis of the amount of work completed as estimated by the Engineer.

210-5.03 No additional payments will be made for any adjustments, cleanout and disposal of accumulated sediments or other such maintenance work on previously installed erosion and pollution control facilities.

210-5.04 When the contract does not contain an item for any aforementioned soil erosion or pollution control, the work will not be paid for directly but will be considered as a subsidiary obligation of the Contractor under other contract items.

SPECIFICATION 210 – SOIL EROSION AND WATER POLLUTION CONTROL

210-5.05 Payment will be made under:

Pay Item Pay Unit

Straw Bales ……………………………………. Each

Sand Bags ……………………………………… Each

Pipe Slope Drains _____………………………. Linear Meter

Paved or Lined Slope Drains _____(Type) …... Square Meter

Earth Berms …………………………………… Linear Meter

Silt-Fence ……………………………………… Linear Meter

Plastic Liner …………………………………… Square Meter

Temporary Blanket…...………………………... Square Meter

Turbidity Barrier (Type)...……………………... Linear Meter

Sandbag Diversion Berm .……………………... Linear Meter

Silt Bag …………………………………………. Each

Temporary Erosion Control Measures ………... Lump Sum

June 13, 2018

SPECIFICATION 603 – PIPE CULVERTS AND STORM DRAINS

SP-603_1 of 8

603-1 DESCRIPTION

603-1.01 Scope

a. This work shall consist of the construction or reconstruction of pipe culverts and storm drains in accordance with these specifications and in conformance with the lines and grades shown on the plans or established by the Engineer. The types, classes (including stiffness), sizes and the location of pipe culverts and storm drains shall be as shown on the plans or as directed by the

Engineer.

b. When the type of pipe is not specified, the Contractor will provide reinforced concrete pipe (RCP), polyvinyl chloride profile wall (PVC) pipe or corrugated polyethylene Type S pipe

(PEP). When more than one type of pipe is indicated, the Contractor will choose among the permissible alternatives provided. When choosing among alternates, the Contractor will include in his proposal the installation of the selected type of pipe in conformance with the Authority’s standard drawings, including but not limited to the class or stiffness of pipe, type of trench, type of backfill, and type of bedding as a subsidiary obligation for the height of soil above the pipe.

c. When the plans do not indicate the type of pipe, type of trench, or type of bedding the

Contractor shall perform the installation in conformance with the requirements of the standard drawings.

d. The specification include the manufacture and installation of the polymer coated corrugated steel pipe (CSP) detailed in the project.

603-2 MATERIALS

603-2.01 Materials shall conform to the requirements of the standard drawings and the following specifications:

Material Specification

Reinforced Concrete Pipe……………………….. 706-1.01

Reinforced Concrete Pipe Arch…………………. 706-1.03

Reinforced Concrete Elliptical Pipe…………….. 706-1.04

Reinforced Concrete D-Load Pipe………………. 706-1.02

Reinforced Concrete Box Sections……………… 706-3

Bituminous Coated Galvanized Corrugated

Steel Pipe and Pipe Arches……………………. 707-1

Slotted Corrugated Steel Pipe, Bituminous

Coated…………………………………………… 707-3

Polyvinyl Chloride Profile Wall Pipe.…………....M-304

Corrugated Polyethylen Pipe…………………..... M-294

Joint Mortar……………………………………... 705-2

Rubber …………………………………………...705-3

Gaskets…………………………………...

SP-603_2 of 8

Plastic Sealing Compound………………………..705-7

Polymer coated steel coils………………………..AASHTO M246 or ASTM A 742.

603-2.02 When the construction plans do not indicate the class of pipe for reinforced concrete pipe, the stiffness for polyvinyl chloride pipe and polyethylene pipe, or the size of corrugations and sheet thickness for corrugated steel pipes, the requirements specified in the standard drawings for the height of soil above the pipe shall be followed.

603-2.03 At the option of the Authority, the plants will be inspected for compliance with specified manufacturing methods and material samples obtained for laboratory testing for compliance with materials quality requirements. Manufacturers’ certificates, for these materials shall be furnished by the Contractor. Manufacturers’ certificates shall include all information necessary to show that the materials comply with the specification. These certificates can be the basis for acceptance of manufacturing lots as to quality.

603-2.04 Prior to and during incorporation of materials in the work, these materials will be subject to inspections and checks by the Engineer at the latest practicable time.

603-2.05 All contiguous pipes shall be of the same kind of material, unless indicated otherwise in the plans. Concrete and metallic pipe ends may be used on polyvinyl chloride and polyethylene pipes.

603-2.06 When required by the Engineer, the Contractor shall mandrel test polyvinyl chloride and polyethylene pipes as described in Appendix A as a subsidiary obligation.

603-2.07 The CSP shall be manufactured in accordance with the applicable requirements of

AASHTO M-245 or ASTMA 762. The pipe sizes, gauges and corrugations shall be as shown on the project plans.

603-3 CONSTRUCTION REQUIREMENTS

603-3.01 Excavation

a. Trenches shall be excavated in accordance with the requirements of Specification 205 -

Trench Excavation, the standard drawings or as directed by the Engineer. Excavation widths shall be sufficient to allow for proper jointing of the conduit and thorough compaction of the bedding and backfill under and around the pipe. Trench width shall never be less than the minimum trench widths specified in the standard drawings.

b. The completed trench bottom shall be firm for its full length and width. In the case of cross drains, the trench shall have a longitudinal camber of the magnitude specified.

c. The method of installation shall be in strict conformance with the details and materials indicated in the standard drawings for the type of pipe, class of pipe or stiffness, type of trench, type of bedding, and type of backfill consistent with the height of soil above the pipe.

SP-603_3 of 8

603-3.02 Bedding

a. For reinforced concrete, polyvinyl chloride and polyethylene pipes the bedding shall be in strict conformance with the requirements contained in the standard drawings.

All beddings will not be measured for payment and shall be a subsidiary obligation of the contract.

b. For corrugated metal pipe, the bed shall be roughly shaped and a bedding blanket of sand or sandy soil classifiable as A-1, A-3, A-2-4 or A-2-5 shall be provided as follows:

Pipe Corrugation Depth Minimum Bedding Depth

½ inch 1 inch

1 inch 2 inches

2 inch 3 inches

603-3.03 Laying Pipe

a. The pipe laying shall begin at the downstream end of the pipe line. The bottom portion of the pipe shall be in contact with the shaped bedding throughout its full length. Bell or groove ends of pipe and outside circumferential laps of corrugated metal pipe shall be placed facing upstream.

Metal pipe shall be placed with longitudinal laps or seams at the sides.

b. Paved or partially lined pipes shall be laid so that the longitudinal centerline of the paved segment coincides with the flow line. Elliptical pipes, when installed with the major axis vertical, shall be placed with the major axis within 5 degrees of a vertical plane through the longitudinal axis of the pipe.

c. When concrete pipe with quadrant reinforcement or concrete circular pipe with elliptical reinforcement is used, the pipe shall be installed in such a position that the manufacturer’s marks designation the top and bottom of the pipe shall be no more than 5 degrees from the vertical plane through the longitudinal axis of the pipe.

603-3.04 Joining Pipe

a. Reinforced concrete pipe may be of the bell and spigot or tongue and groove design unless one type is specified. The method of joining pipe sections shall be such that the ends are fully entered and the inner surfaces are reasonably flush and even.

b. Joints on concrete pipes shall be sealed with rubber gaskets as indicated in the standard drawings.

c. Corrugated metal pipes and corrugated polyethylene pipes shall be firmly joined by water tight coupling bands.

d. Polyvinyl profile wall and polyethylene pipes shall be joined as indicated in the standard drawings.

e. Connection of all pipes to concrete structures such as headwall, catch basins, inlets, etc.

shall be as indicated in the standard drawings.

f. Pipes shall be inspected before any backfill is placed. Any pipe found to be out of alignment or unduly settled shall be taken up and relaid at the Contractor’s expense. Any damaged

SP-603_4 of 8 pipe which is not repairable shall be removed and replaced at the Contractor’s expense.

g. For corrugated steel pipe – polymer coated used as interior liner in tunnel section shall be joined by water tight coupling band modified for use as an internal Expanding Border compliance with construction drawings.

603-3.05 Shop Elongation - Where required by the plans, the vertical diameter of circular corrugated metal pipes shall be increased 5 percent by shop elongation.

603-3.06 Backfilling

a. After the pipe is installed, the trench shall be backfilled and compacted in accordance with Article 3.07 of Specification 205 - Trench Excavation and the requirements of the standard drawings.

b. When the top of the pipe is even with or below the top of the trench (negative projection), backfill material shall be placed at or near optimum moisture content and compacted in layers not exceeding 15 centimeters in thickness (compacted) on both sides to an elevation 30 centimeters above the top of the pipe. Care shall be exercised to thoroughly compact the backfill under the haunches of the pipe. The backfill shall be brought up evenly on both sides of the pipe for the full required length. The backfill material shall be placed and compacted for the full depth of the trench except where the induced trench installation method is specified.

c. When the top of the pipe projects above the top of the trench (positive projection), backfill shall be placed at or near optimum moisture content and compacted in layers as specified in paragraph 3.06 b above for the full length of the pipe and to an elevation of 30 centimeters above the top of the pipe. The width of the backfill on each side of the pipe for the portion above the top of the trench shall be equal to twice the diameter of the pipe or 3.6 meters, whichever is less. The backfill material used in the trench section and the portion above the top of the trench for a distance on each side of the pipe equal to the horizontal inside diameter and to 30 centimeters above the top of the pipe shall conform to the requirements for backfill material specified in the standard drawings. The remainder of the backfill shall consist of material acceptable for embankment construction.

d. All pipe after being bedded and backfilled as specified herein shall be protected by a minimum 1.20 meter cover of fill before heavy equipment is permitted to cross during construction of the roadway.

603-3.07 Induced Trench Method

a. When the installation of a concrete pipe in an embankment by the induced trench method is specified, the construction shall proceed as shown on the standard drawings.

b. There will be no payment for the double handling and double excavation inherent in the induced trench method and said operations shall be considered a subsidiary obligation.

603-3.08 lotted Pipe

SP-603_5 of 8

a. Slotted pipe shall be installed as shown on the plans and standard drawings and in accordance with the applicable provisions for excavation, bedding, laying, joining and backfilling with the following additional requirements.

b. The slot shall be covered with a heavy duty tape or other approved covering during backfilling and paving operations to prevent infiltration of material into the pipe. The Contractor will be responsible to clean all pipes affected by his operations as a subsidiary obligation.

c. The concrete apron and backfill of the pipe shall be constructed as shown on the plans and standard drawings as a subsidiary obligation.

603-3.09 Damaged Pipe

a. Pipe that is damaged or disturbed by the Contractor’s operations prior to acceptance of the contract shall be repaired, realigned or replaced as directed by the Engineer at the Contractor’s expense. Pipe which is defective form any cause, including damage caused by handling and determined by the Engineer to be unrepairable, shall be unacceptable for installation, and shall be replaced as directed by the Engineer at no cost to the Owner.

b. Concrete pipe and concrete end sections with minor damage resulting from occasional imperfections in manufacturing or accidental injury during handling, may be repaired if so determined by the Engineer. The repairs shall be sound, properly finished and cured, and the repaired pipe shall conform to the requirements of the specifications.

c. Damage to bituminous coatings or bituminous paved inverts may be repaired in the field by a hot application of asphalt cement subject to approval by the Engineer.

603-3.10 Relaying Pipe -These construction specifications shall equally apply in the case of relaid pipes. In addition, all pipe salvaged for relaying shall be cleaned of all foreign material prior to reinstallation.

603-4 METHOD OF MEASUREMENT

603-4.01 Pipes of the different types and sizes, both new and relaid, will be measured along the invert by the linear meter, to the nearest tenth of a meter, in place and accepted.

603-4.02 Elbows and branch connections will be included in the length measurement for pipes.

603-4.03 Special end sections, including tapered inlets, will be measured by the number of units installed.

603-4.04 Portland cement concrete for Class A bedding will not be measured for direct payment and will be a subsidiary obligation of the Contractor with its unit cost included in the contract unit price of the respective pipes.

603-4.05 Portland cement concrete for slotted pipe aprons and backfill will not be measured for direct payment but shall be a subsidiary obligation of the Contractor with its cost included in the contract unit price for slotted pipe.

SP-603_6 of 8

603-4.06 Material for Class B and Class C beddings will not be measured for direct payment.

These materials shall be a subsidiary obligation of the Contractor with its cost included in the unit price for the respective pipes.

603-4.07 Backfill will not be measured for direct payment, regardless of class, as this is a subsidiary item under the pay item of Trench Excavation.

SP-603_7 of 8

603-5 BASIS OF PAYMENT

603-5.01 The accepted quantities of pipe and end section, measured as provided below, will be paid for at the contract unit prices per unit of measurements for the types, classes and sizes specified complete in place. Such prices and payment shall constitute full compensation for the furnishing and placing of all materials, and for all equipment, tools, labor and incidentals necessary to complete each item as required by the plans and specifications.

603-5.02 Excavation for pipe culverts and storm drains, including excavation in embankments and removal of unsuitable materials will be measured and paid for as provided in Specification 205

-Trench Excavation. When the contract does not contain an estimated quantity and unit price for trench excavation, this excavation will be subsidiary obligation of the Contractor with its cost included in the unit prices for the respective pipes.

603-5.03 Concrete for Class A bedding will not be paid and will be subsidiary obligation of the

Contractor with its cost included in the unit prices for the respective pipes.

603-5.04 Payment will be made under:

Pay Item Pay Unit

___ inch PVC Pipe, Stiffness ____………………………………………………………………….. Linear Meter

___ inch PEP Pipe, Stiffness ____…………………………………………………………...…….... Linear Meter

___ inch Reinforced Concrete Pipe, Class…………………………………………………………… Linear Meter

___ inch Reinforced Concrete Pipe, D-Load………………………………………………………… Linear Meter

___ inch End Section (RCP or PEP)………………………………………………………………………… Each

___ inch Reinforced Concrete Culvert End Section…………………………………………………...…….. Each

___ inch rise, ____inch span, Elliptical Reinforced Concrete Pipe; Class ____………………...…… Linear Meter

___ inch rise,____ inch span, Elliptical Reinforced Concrete Pipe End Sections…………………………… Each

___ inch (or meter) span, ____inch (or meter) rise, Precast Reinforced Concrete Box Sections...…. Linear Meter

___ inch, Bituminous Coated Corrugated Steel Pipe Type ____, Gage ____, Corrugations____…… Linear Meter

___ Bituminous Coated Corrugated Steel End Section, Type ____, Gage ____, Corrugations___……........ Each

___ inch span, ____inch rise, Bituminous Coated Corrugated Steel Pipe Arch, Type ____, Gage ___Corrugation

___ ………………………………………………………………………………………........ Linear Meter

___ inch span, ____ inch rise, Bituminous Coated Corrugated Steel Pipe Arch, End Sections, Type ____, Gage

____, Corrugations ____…………………………………………………………………………………………. Each

___ inch, Bituminous Coated Slotted Corrugated Steel Pipe, Type ____, Gage ____, Corrugations

____………………………………………………………………………………………….……….…..Linear Meter

___ Relaying of ____ inch (RCP, PVC, PEP, CM or CSP) Pipe ………………………………………….Linear

Meter

___ inch Polymer Coated Corrugated Galvanized Steel Pipe Gage ____, Corrugations_____............ Linear Meter

Abbreviations: RCP -Reinforced Concrete Pipe, PVC Profile Wall Polyvinyl Pipe, PEP Corrugated

Type S Polyethylene Pipe, CM Bituminous Coated Corrugated Steel Pipe

CSP – Polymer Coated Corrugated Steel Pipe

Appendix A Mandrel Testing for PVC and PEP Pipes

SP-603_8 of 8

When required by the Engineer, the Contractor shall be responsible to perform the mandrel deflection testing on the pipeline installation not less than 30 days after installation has been completed. This testing shall be accomplished by pulling an approved mandrel (see detail below) through every completed pipeline. Deflection shall be limited to 5%. Any line failing this test shall be removed, then relaid if the pipe is not damaged, or replaced with acceptable new pipe at the

Contractor’s expense, then retested. The cost of deflection testing and any corrective actions shall be borne by the Contractor and shall be incidental to the bid item. The use of vibratory re-rounding device of any kind is strictly prohibited.

Revised: September 4, 2018

SUPPLEMENTAL SPECIFICATION

REVISIONS TO STANDARD SPECIFICATION 606 –

GUARDRAIL

SS-606/Page 1 of 10

606-1 DESCRIPTION

606-1.01 Scope

a. This work shall consist of furnishing and erecting W beam guardrail systems and other types of metal barriers, all named collectively as guardrail, in accordance with these specifications, the standard drawings and in conformity with the lines, grades, types, details and locations shown on the plans or established by the Engineer.

b. The work shall also include, when called for in the contract documents:

1. The removal and resetting of existing guardrail as shown on the plans or as ordered by the Engineer.

2. The removal, storage, and delivery of existing guardrail to be salvaged as shown on the contract documents, plans or as ordered by the Engineer.

3. The refurbishing of existing guardrail according to plans or as directed by the engineer.

4. The furnishing and erecting of crashworthy end terminals at locations shown on the plans and according to this specification and standard drawings.

5. The furnishing and erecting guardrail transition sections to be installed on existing guardrail or on existing or new transition modules in accordance with these specifications, the standard drawings and in conformity with the lines, grades, types, details and locations shown on the plans or established by the Engineer.

c. The construction of the guardrail system shall include the assembly and erection of all necessary component parts and materials as required by the manufacturer and standard drawings at the locations shown on the plans or as directed by the Engineer.

d. This work shall include the submittal of an installation schedule for all guardrail works.

SS-606/Page 2 of 10

606-2 MATERIALS

606-2.01 Materials for guardrail, guardrail transition sections, guardrail posts, offset blockouts and any other necessary hardware to complete the proper guardrail system installation shall conform to the Specification 710, standard drawings, or as shown on the plans.

606-2.02 Manufactured materials, including guardrail systems, metal barriers and crashworthy end terminals will be accepted on the basis of the Authority’s inspection, and submission of manufacturer’s certificate of compliance with the specifications. This certificate shall be completed meeting the requirements of the Article 106.06 of the General

Provisions and the Buy America Clause Special Provision. The certificate shall clearly refer to the specific materials being delivered to the project site and shall be submitted to the

Engineer prior to starting the installation of the guardrail. The Authority reserves the right to inspect the manufacturing plant and/or to test samples of materials as it deems appropriate.

Failure of the Contractor to comply with the above requirements will be cause for the rejection of the guardrail.

606-2.03 All materials shall be new. The use of reconditioned used materials will not be permitted except as provided under paragraphs 606-1.01 b.1, and 606-1.01 b.3 of the Article

606-1.01 above.

606-3 CONSTRUCTION REQUIREMENTS

606-3.01 Posts

a. Posts shall be driven unless otherwise specified on the plans or by the Engineer.

The driving shall be accomplished with equipment and methods that will drive the posts plumb in their final position, free of any distortion, burring or damage.

b. When driving is not possible, the posts shall be set in dug holes which shall be backfilled with acceptable material as indicated in the standard drawings. Posts should be attached to concrete slab as indicated in the standard drawings.

c. When posts are driven on holes cut through concrete or treated material, the

Contractor shall backfill as indicated in the standard drawings.

d. All posts shall be aligned to a tolerance of 0.6 centimeters for plumb and grade line.

SS-606/Page 3 of 10

e. When required, and as approved by the Engineer, posts shall be cut with a saw to obtain a clean uniform finish. The cut surface shall be repaired within 15 centimeters of the cut and prior to post installation, with two coats of paint containing zinc dust meeting the requirements of the ASTM A780. Apply the paint as in accordance with the manufacturer’s printed instructions. This work shall be considered as a subsidiary obligation of the Contractor.

606-3.02 Rail Elements - Rail elements shall be erected in a manner resulting in a smooth, continuous installation. Washers shall be used at the rear of the posts. All bolts shall be drawn tight with adjustment bolts to be tightened after adjustments are completed.

Bolts shall be of sufficient length to extend beyond the nuts. Rail plates shall be spliced by lapping in the direction of traffic.

606-3.03 Repair of Galvanized Surfaces - Galvanized surfaces which have been abraded during handling and erection so that the base metal is exposed, threaded portion of all fittings and fasteners, and cut ends of bolts shall be repair conforming to ASTM A780.

Use paint containing zinc dust. Apply the paint as in accordance with the manufacturer’s printed instructions. This work shall be considered as a subsidiary obligation of the

Contractor.

606-3.04 Removing and Resetting Guardrail

a. The Contractor shall carefully remove and store existing guardrail sections, including posts, from the locations shown on the plans. The Contractor shall reset the reusable components at the locations shown on the plans or ordered by the Engineer.

b. The Engineer will determine which components are reusable. Existing concrete posts and wood blockouts shall not be reused. They shall be replaced by steel posts and blockouts in accordance with the standard drawings.

c. The Contractor shall replace unusable or missing components with new materials for a complete system installation as a subsidiary obligation of the

Contractor under this pay item.

SS-606/Page 4 of 10

d. Reusable components that have rusted portions shall be thoroughly sanded to remove the rust and these portions shall be repaired with two coats of paint containing zinc-dust meeting the requirements of the ASTM A780, at no extra cost.

e. Holes left when guardrail posts have been removed, shall be backfilled with suitable material and compacted in a manner approved by the Engineer.

f. Resetting of guardrail shall be accomplished in the same manner specified in

Article 3.01, 3.02 and 3.03 above for new guardrail installations.

g. Unusable material shall be disposed of by the Contractor away from the project site.

606-3.05 Removing, Storing and Delivering Guardrail

a. The Contractor shall carefully remove and store existing guardrail, including posts, from the locations shown on the plans or directed by the Engineer. The work shall be done in a neat and workmanlike manner so as to salvage all reusable parts.

b. Unusable material, such as concrete posts and wood blockouts, as determined by the Engineer, shall be disposed by the Contractor outside the project site.

c. Usable materials shall be delivered by the Contractor to the location indicated

d. All holes left from removal of guardrail shall be backfilled as indicated in paragraph 606-3.04e above.

SS-606/Page 5 of 10

606-3.06 Refurbishing Existing Guardrails

a. Remove steel blockouts in existing guardrails and replace them with blockouts specified in the standard drawings. Spray the connecting bolts with penetrating oil for easier removal.

b. Drill new holes on the posts to meet the blockout and guardrail elevation shown on the standard drawings, if necessary. Provide new bolts, nuts and washers required to install the blockout and guardrail beam.

c. Remove the existing rectangular washer located between rail and post bolt head.

d. Provide guardrail reflector as per standard drawings and as directed by the

Engineer.

e. The Contractor shall replace missing components with new materials for a complete system installation in compliance with the standard drawings as a subsidiary obligation under the refurbishing existing guardrail pay items. This includes:

1. Bolts, nuts and washers

2. Blockouts

3. Guardrail reflectors

4. Anchorage components (either double face or single face) including:

W-beam panel, Post, W-Beam End Section (rounded or buffer), Anchor

Bracket, Cable Anchor Assembly, Soil Plate, Bearing Plate, and all necessary hardware for the construction of the anchorage.

f. Make sure all 8 bolts are in place in each splice connection. If there are missing bolts at a splice, install new bolts, nuts and washers. Tightened snug all bolt connections on the refurbished guardrail, either new or existing bolts.

g. No rail, post or bolt assembly shall be subjected to torch cutting. Any new holes shall be drilled.

h. Existing components to remain that have rusted portions shall be thoroughly sanded to remove the rust and these portions shall be painted with two coats of zinc-dust paint meeting the requirements of the ASTM A780 as a subsidiary obligation.

SS-606/Page 6 of 10

i. Unusable material shall be disposed of by the Contractor away from the project site at approved locations.

606-3.07 Crashworthy End Terminals (CET)

a. CET shall be installed following all manufacturers’ recommendations, plans and specifications.

b. The Contractor shall submit a copy of manufacturer’s installation manual and shop drawings to the Engineer prior to the guardrail installation activities.

c. The Contractor shall conform to the required type, test level, grading limits and transversable clear zone shown on plans and standard drawings.

d. The Contractor, as a subsidiary obligation, shall submit an inventory data

(Attachment A included in this specification for reference) for each CET installed following the items below:

1. Each CET inventory data shall include the following:

a. Project information

b. Contractor’s information

c. CET Id (Name).

d. CET manufacturer and serial number

e. Location of the top center of the CET ( X and Y coordinates NAD 1983)

f. CET Description

g. Installation date

h. Final Acceptance date

i. Photo taken after Final Acceptance date

j. SHP File for all information required

2. The Contractor is required to submit the inventory data to the Engineer in Excel format and SHP file via electronic media. The Contractor is responsible to obtain from the Engineer the required electronic format

SS-606/Page 7 of 10

e. A certificate of installation indicating full compliance with the manufacturer’s shop drawings and installation manual shall be furnished by the Contractor to the

Authority for each CET installed in the project. The Certificate of Installation shall be sealed and certified by a Professional Engineer authorized to perform engineering works in Puerto Rico.

f. Acceptance of each CET installed on the project will be based upon submittal of all required documentation and inspection by the Authority.

606-3.08 W- Beam Guardrail Transition Connection Sections

a. Thrie-beam transition section shall be installed following the standard drawings.

b. Acceptance of each thrie-beam transition section installed on the project will be based upon inspection by the Authority.

606-3.09 Installation Schedule

a. The Contractor shall submit an installation schedule with at least fifteen (15) days in advance the installation works begin. Acceptance or rejection of this schedule will be issued by the Engineer within ten (10) days after the submittal. If the schedule is rejected, the Contractor shall submit a revised installation schedule within the next three (3) days for approval.

b. The Contractor shall not begin any activity related to the installation of guardrail, without the approval of the installation schedule.

c. No time extensions will be issued because of modifications of the original installation schedule.

d. The installation schedule shall include:

1. Location in the project where each activity occurs.

2. Procedures to keep the guardrail system…