All openings shall be backfilled within the same working day the opening occurred. In special cases where the excavation must remain open for longer periods, the contractor must secure the surface and establish traffic control in accordance with the Pennsylvania Department of Transportation Publication 408, Section 901 and Publication 213.
All openings must be resurfaced within 15 days of the Permit Issue Date or on or before determination of just cause and written approval from the Borough Manager according to the following methods:
(a) The Contractor shall provide all materials, labor, and equipment necessary to perform all backfill, and grading required for the restoration of the trench in any public highway, road, street, lane or alley in the Borough
(b) Pipe zone bedding material shall be as required by each individual utility company for their type of pipe or at a minimum as follows:
(1) Cast iron or ductile iron pipe - Crushed stone or gravel meeting the requirements of PennDOT Publication 408, Section 703.3 for select granular material (2RC) or PennDOT No. 2A aggregate.
(2) PVC Pipe - Crushed stone or gravel meeting the approval requirements of PennDOT Publication 408 (Latest Edition) for AASHTO No. 10 coarse aggregate; AASHTO No. 57 modified aggregate; No. 2B modified; or No. 2A aggregate.
(3) Cement Concrete and Reinforced Cement Concrete Pipe - Crushed stone or gravel meeting the requirements of PennDOT Publication 408 (Latest Edition) Section 703.2 for No. 2A coarse aggregate. (No slag material)
(c) Compacted backfill shall be crushed stone or gravel meeting the requirements of PennDOT Publication 408 (Latest Edition) Section 703.2 for No. 2A coarse aggregate. (No slag material) used for filling pipe trenches and all excavated areas. Compacted backfill shall also be used for replacing caved-in material, and for replacing materials excavated beyond the established limits. Compacted backfill shall be placed to the original ground surface or to the lines and grades required to establish top of sub-base in those areas to be repaved or subgrade in those areas to receive topsoil, as specified herein, or as directed by the Engineer
(d) Sub-base shall consist of the preparation of the top surface of the roadbed or ground to accommodate the placement of pavements, slabs, structures, shoulders, curbs, gutters, topsoil, etc.
(e) No frozen or excessively wet material shall be used as backfill.
(f) No slag, fly ash, or bottom ash materials shall be used for bedding, backfill, or fill materials.
(g) The road replacement section shall match that which already exists on the surrounding street or match the following minimum section description, whichever is greater, as described from the top finished surface down:
(1) 1½" - 9.5 MM SUPERPAVE WEARING COURSE
(2) 4" - 25 MM SUPERPAVE BINDER BASE COURSE
(3) PENNDOT NO. 2A COARSE AGGREGATE. (NO SLAG MATERIAL)
(h) The Contractor shall backfill excavations as promptly as work permits, but not until the completion of the following:
(1) Acceptance by the Borough Manager or Engineer of construction below finish grade
(2) Inspection, testing, approval, and recording the locations of underground utilities.
(3) Removal of concrete formwork.
(4) Removal of shoring and bracing and backfilling of voids with satisfactory materials. The Contractor shall cut off temporary sheet piling driven below the bottom of structures or utilities, or leave it in place if required by the Engineer.
(5) Removal of trash and debris.
(i) Backfilling operations shall be conducted so that permanent structures will not be disturbed and so that the lines and grades of the pipes will be maintained. Backfill shall be placed in the dry and shall not be placed on wet or frozen ground.
(j) Backfill shall be placed neither against nor on top of new concrete surfaces until the earlier condition stated below has been attained, unless otherwise directed by the Engineer.
(1) The concrete has developed at least seventy percent (70%) of the specified 28-day strength.
(2) The time elapsed since the placement of concrete is at least:
A. Walls and vertical faces - 10 days.
B. Conduit (inside forms in place) - 7 days.
C. Footings, cradles or bedding - 2 days.
(k) Backfill around structures and pipe trench backfill shall be placed in four inch (4") layers and each layer shall be compacted with approved mechanical tampers. Where the material is granular in nature, vibratory-type power tampers shall be used. The Contractor may increase the backfill placement depth if hydraulic equipment is used; however, the equipment and the placement depths must receive prior approval from the Engineer.
(l) Compacted PennDOT No. 2A Coarse Aggregate Backfill should be compacted to at least 90 percent relative density as determined by ASTM test Designation: D4253- and D4254-00.
(m) Should the engineer approve a backfill material other than the preapproved PennDOT No. 2A Coarse Aggregate, said material shall be compacted as follows:
(1) Pipe Trench - Unpaved Areas - Compaction shall be 85% of Standard Proctor.
(2) Pipe Trench - Paved Areas - Compaction shall be 95% of Standard Proctor.
(3) Pipe Trench - Road Shoulder Areas - Compaction shall be 95% of Standard Proctor.
(n) Specified compaction requirements shall not relieve the Contractor from making repairs to backfilled areas in the event of settlement.
(o) The Borough Manager or Engineer will have the right to conduct compaction tests at random throughout the work. If it is found that the compaction is unsatisfactory, the Contractor will be notified. If it is confirmed that the backfill compaction is not as specified, then the Contractor shall remove all unsatisfactory backfill and shall replace it properly at no additional cost to the Owner.
(p) Traffic control shall be in accordance with the Pennsylvania Department of Transportation Publication 408, Section 901 and Publication 213, (where applicable) and shall be maintained during the entire construction operation. Any periodic lane closures within the project area shall be coordinated with and approved by the Borough Manager. The cost of flagmen and inspectors and all traffic control required for all work on the project shall be paid by the Contractor.
(q) Pavement materials shall as follows:
(1) Superpave HMA 25.0mm Base Course - conforming to PennDOT Publication 408, Section 309.
(2) Superpave Standard and RPS HMA 9.5mm Fine Grade Wearing Course - conforming to PennDOT Publication 408, Section 409.
(3) Concrete Cement
A. Roadway Replacement - High early strength conforming to PennDOT Publication 408, Section 704.
(4) Bituminous Surface Treatment shall conform to PennDOT Publication 408, Section 480.
(5) Prime Coat - MC-30 or MC-70 conforming to PennDOT Publication 408, Section 461.
(6) Tack Coat - E-1 Emulsified Asphalt conforming to PennDOT Publication 408, Section 460.
(7) Joint Sealer - shall conform to PennDOT Publication 408, Section 401.3(j)(3).
(8) 2A aggregate shall be as specified in PennDOT Publication 408, Section 703.2.
(9) Geotextile, Class 4 - shall be in accordance with PennDOT Publication 408, Section 735.
(Ord. 3583. Passed 7-19-10.)
(Ord. 3583. Passed 7-19-10.)
(r) Pavement restoration shall be to the lines and grades that existed prior to the work and made after proper backfill of the excavated area as follows:
(1) Superpave HMA 25.0mm Base Course shall be applied as per PennDOT Publication 408, Section 309. Depth shall match that which already exists surrounding the excavation or four-inch (4") thickness, whichever is greater.
(2) Cement Concrete Sidewalks and other concrete paved areas shall be a minimum four-inch (4") thickness with a four-inch (4") 2B aggregate base.
(3) The existing wearing surface shall be milled from five (5) feet behind and five (5) feet ahead of the area excavated and from the edge of the existing roadway to the centerline of the existing lane excavated. If the excavation extends across the centerline of the existing roadway, then restoration shall be from edge of pavement to edge of pavement of the existing roadway and shall be milled to a depth of one and one half-inches (1½") with a skewed paving notch. This area shall then be thoroughly cleaned and debris removed.
(4) Superpave Standard and RPS HMA 9.5mm Fine Grade Wearing Course (if required) shall be applied as per Penn DOT Publication 408, Section 409. Depth shall be at a minimum of one and one-half inch (1½") thickness, or greater to match the lines and grades that existed prior to the work.
(Ord. 3610. Passed 6-20-11.)
(s) Pavement restoration shall be to the lines and grades that existed prior to the work and as follows:
(1) Prior to restoration, the existing pavement edge shall be cut or sawed in a neat straight line to the bottom elevation of the existing sub-base. Drilling will not be permitted. All existing pavement damaged by the work shall be removed and replaced.
(2) Superpave Standard and RPS HMA 9.5mm Fine Grade Wearing Course (if required) shall be applied as per PennDOT Publication 408, Section 409.
(3) Superpave HMA 25.0mm Base Course shall be applied as per PennDOT Publication 408, Section 309.
(4) Cement Concrete Sidewalks and other concrete paved areas shall be a minimum four-inch (4") thickness with a four-inch (4") 2B aggregate base.
(t) Conditioning Existing Surfaces
(1) The Contractor shall apply the prime coat on absorbent, non-bituminous base or subbase.
(2) The Contractor shall apply the tack coat on the edges of the existing pavement for bonding with new Superpave.
(u) Sealing of Joints.
(1) After the Superpave Standard and RPS HMA 9.5mm Fine Grade Wearing Course has been placed and compacted flush with the existing adjacent pavement, the joint between the new and existing pavement shall be sealed with a joint sealer placed in a minimum four-inch (4") strip (maximum six-inch (6") width) and sprinkled with sand to prevent pickup by traffic.
(2) The joint between new concrete paving and old concrete shall be sealed by constructing a sealant reservoir, one-half inch (½") wide and one-half inch (½") deep along the joint by sawing, forming, or tooling. The reservoir shall be sealed with joint sealing material meeting the requirements of PennDOT Publication 408, Section 705.4(b).
(Ord. 3583. Passed 7-19-10.)