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The work covered by this section consists of all excavation, trenching, undercutting, foundation conditioning, bedding, backfilling, compaction, pavement, sidewalk and driveway repair necessary for installation of water and sanitary sewer mains and services as shown in the plans and special provisions.
The Department and the Owner makes no representation as to the materials to be encountered. The Contractor shall satisfy himself as to the type, nature and quantities of all materials to be excavated.
All materials shall meet the requirements or Division 10 shown below:
Select Material Section 1016
Portland Cement Concrete Section 1000
The classification of select material shall meet the requirements of Article 10163. The location and class of select material for foundation conditioning, bedding and backfill shall be as shown on the plans or as directed by the Engineer.
1505-3 CONSTRUCTION REQUIREMENTS.
The applicable requirements of Section 107, Articles 3001, 3004, 3006 and Section 654 of the Standard Specifications and the following specifications shall apply:
In general, all portions of the excavations shall be made so that the safe slope of the earth is not exceeded. The Contractor shall comply with all OSHA requirements and provide a competent person on site to supervise excavation at all times. It shall be the responsibility of the Contractor to properly and adequately protect any part of the excavation from caving or slipping by the use of sheeting, bracing, or shoring as required. All shoring or underpinning shall be put in place or driven by men skilled in such work.
All shoring in trench excavations shall be installed so that it may be withdrawn in stages on both sides of the trenches to prevent lateral movement of the pipe as the backfilling progresses, except where the Engineer permits the shoring to be left in place at the Contractor's request. The Contractor shall cut off any sheeting left in place at least twenty-four inches below finished grade wherever directed and shall remove and properly dispose of the material cut off.
Wherever necessary, in quicksand, soft or wet ground, or for the protection of surrounding structures and property, sheeting shall be driven to such depth below the bottom of the excavation as may be necessary. The Contractor may use well points or other methods in lieu of sheeting to stabilize the banks or for protection at the discretion of the Contractor.
The Contractor shall take all measures necessary to keep surface water out of the foundations and trenches by diking, ditching, or otherwise avoiding it. Provisions for surface drainage shall meet the approval of the Engineer.
All excavations shall be kept free of water while the work is in progress. Water may be removed by pumps or the use of underdrains, whichever will produce the above results.
All excavated material shall be deposited in a manner that will not endanger the work and that will avoid obstructing sidewalks and driveways. Hydrants under pressure, valve pit covers, valve boxes, curb stop boxes, fire and police call boxes, or other utility controls shall be left unobstructed and accessible at all times. Gutters shall be kept clear or other satisfactory provisions made for street drainage, and natural watercourses shall not be obstructed.
The Contractor shall take whatever measures necessary to control erosion and keep silt runoff from contaminating adjoining property.
Pipe shall not be laid upon a foundation into which frost has penetrated, or at any time, that in the opinion of the Engineer, there is danger of the formation of ice or frost at the bottom of the excavation. The Engineer may at his discretion allow construction of the pipeline to continue under freezing conditions provided the Contractor promptly backfills the trench as directed.
Pipe and accessories shall be carefully lowered into the trench with suitable equipment. Under no circumstances shall any of the materials be dropped or dumped into the trench.
Care shall be taken to avoid abrasion of the pipe coating. Poles used as levers for removing skids across trenches shall be of wood and shall have broad flat faces to prevent damage to the pipe or pipe coating.
Backfilling shall be done in accordance with Article 3006 and compacted to the density required by Subarticle 2354(C).
1505-4 REPAIR OF PAVEMENTS, SIDEWALKS AND DRIVEWAYS.
Sidewalks and driveways that are disturbed by the excavation and trenching operation shall be repaired to an original or better condition using Class B Concrete.
Asphalt plant mix shall be used for pavement repair to replace pavement which was removed in order to remove or place utility pipe lines. All work shall be in accordance with Section 654. Immediately upon completion of the pipe line removal or installation, repair shall be made within the pavement area.
1505-5 CONCRETE ENCASEMENT OF UTILITY LINES.
Existing or proposed utility lines shall be encased in Class B concrete for protection in areas as shown on the utility plans, special provisions and/or as directed by the Engineer. The concrete shall be placed completely around the line with a minimum thickness of 6 inches.
(A) General:
1. Trenching, excavation, and backfilling for utilities will be considered as included in the contract price for the applicable utility item and no separate measurement will be made therefor.
2. The following work and items will also be considered as included in the contract price for the applicable utility item and no separate measurement will be made therefor:
a. Undercut or Wet Excavation
b. Dewatering of Excavation
c. Shoring and Sheeting
d. Repair of Sidewalks and Driveways
(B) Foundation Conditioning:
Select material for foundation conditioning will be measured as provided for in Subarticle 3008B(2).
(C) Select Material for Backfill:
Select material for backfill will be measured as provided for in Subarticle 3008C.
(D) Bedding Material:
Select material for bedding will be measured as provided for in Subarticle 3008D.
(E) Asphalt Plant Mix:
Asphalt Plant Mix for pavement repair will be measured as provided for in Article 6544.
(F) Concrete for Encasing Utility Lines:
The quantity of Class B concrete for encasing utility lines will be measured by the actual number of cubic yards of concrete, measured in place, installed in accordance with Article 15055 completed and accepted.
(A) General:
No direct payment will be made for any work in Subarticle 15056(A), payment will be made in the applicable utility item.
(B) Foundation Conditioning:
The quantity of foundation conditioning material, measured as provided in Subarticle 3008(B)(2), will be paid for at the contract unit price per ton for "Foundation Conditioning Material, Utilities Class ___________".
No direct payment will be paid for undercut excavation. Payment at the contract unit price for "Foundation Conditioning Material, Utilities" will be full compensation for all work of pipe undercut excavation.
The above price and payment will be full compensation for all work of foundation conditioning including all pipe undercut excavation, furnishing, placing and compaction of foundation conditioning material, shaping the pipe foundation, and hauling and disposing of undercut materials.
(C) Select Backfill Material:
Where local material meeting the requirements for select backfill material as specified in Section 1016 is used for backfilling above the foundation, this material will be paid for as provided in Article 2258 for "Unclassified Excavation" or in Article 2306 for "Borrow Excavation", depending on the source of the material.
Where other than local material is used for backfilling above the foundation, the quantity of select backfill material, measured as provided in Subarticle 3008(C), will be paid for at the contract unit price per ton for "Select Backfill Material Utilities, Class ________", or where there is no unit price in the contract applicable to the class of select backfill material involved, the select backfill material will be paid for as extra work in accordance with Article 1047.
The above prices and payments will be full compensation for all work of providing select backfill material, including all excavation, hauling, furnishing, placing and compaction of backfill material.
(D) Bedding Material:
(1) Using Local Material:
The quantity of bedding material, measured as provided in Subarticle 3008(D), will be paid for as provided in Article 2258 for "Unclassified Excavation" or in Article 2306 for "Borrow Excavation", depending on the source of the material.
The above prices and payments will be full compensation for all work of furnishing compaction and shaping the bedding material in accordance with Article 3004.
(2) Using Other Than Local Material:
The quantity of bedding material, measured as provided in Subarticle 3008(D), will be paid for at the contract unit price per ton for "Bedding Material, Utilities Class____________".
The above prices and payments will be full compensation for all work of furnishing compaction and shaping the bedding material in accordance with Article 3004.
(E) Asphalt Plant Mix, Pavement Repair:
The quantity of asphalt plant mix measured as provided in Article 6544, completed in place and accepted will be paid for at the contract unit price per ton for "Pavement Repair for Utility Work".
The above price and payment will be full compensation for all work covered by this section, including but not limited to cutting, removal, and disposal of pavement, base and subgrade; furnishing and applying tack coat; furnishing, placing, and compacting of bituminous plant mix; furnishing of asphalt cement for the bituminous plant mix; and furnishing scales.
Any provisions included in the contract in the form of project special provisions or in any other form which provide for adjustments in compensation due to variations in the price of asphalt cement will not be applicable to payment for the work covered by this section.
The item of "Pavement Repair for Utility Work" will be considered to be a minor item. In the event that the item of "Pavement Repair for Utility Work" overruns the original bid quantity by more than 100 percent, the provisions of Article 1045 pertaining to revised contract unit prices for overrunning minor items will not apply to this item.
(F) Concrete for Encasing Utility Lines:
Class B concrete, installed in accordance Article 15055 and accepted will be measured and paid for at the contract unit price per cubic yard for "Class B Concrete for Encasing Utility Lines". Such prices and payments will be full compensation for all materials, labor, excavation, backfilling, and incidentals necessary to complete the work as required.
(G) Compensation:
Payment at the contract prices for the various items covered by Sections 1510 and 1520 will be full compensation for all work covered by this section other than the work of providing, placing and compacting foundation conditioning, select backfill and, bedding material, and providing and placing asphalt plant mix and concrete for encasing utility lines.
(H) Pay Items:
Payment will be made under:
Foundation Conditioning Material, Utilities Class______ Ton
Select Backfill Material, Utilities Class_______ Ton
Bedding Material, Utilities Class______ Ton
Pavement Repair for Utility Work Ton
Class "B" Concrete for Encasing Utility Lines Cubic
Yard