The Table of Contents for this section is available.
The work covered by this section consists of the construction of underdrains, blind drains, or other types of subsurface drain except shoulder drains, and furnishing and installing painted pavement markers and vertical markers to locate concrete pads for the drains in accordance with the requirements of the plans and the provisions of these specifications.
All materials shall meet the requirements of Division 10 shown below:
Subdrain fine aggregate Article 1044-1
Concrete pipe fittings Article 1044-3
Corrugated steel pipe and fittings Article 1044-4
Polyvinyl chloride plastic (PVC) pipe Article 1044-5
____" Outlet Pipe Article 1044-7
Corrugated plastic pipe and fittings Article 1044-6
Portland cement concrete Section 1000
Pavement Markers Paint Section 1087
Steel Marker Article 1072-4
Steel Marker Paint Article 1080-14
Subsurface drainage pipe and fittings may be, at the option of the Contractor, either concrete, corrugated steel or corrugated plastic.
The trench shall be excavated to the width shown on the plans unless otherwise directed by the Engineer, and to the depth, line and grade established by the Engineer.
Corrugated steel pipe sections shall be firmly joined together by coupling bands or other approved mechanical methods which will firmly join the sections together.
Perforated pipe shall be laid with the perforated segments of the pipe down except that when subsurface water is to be passed through dry materials, the perforations shall be turned up or else non-perforated pipe may be used. When concrete pipe is used and subsurface water is to be passed through dry materials, mortared joints shall be made in accordance with the requirements of Subarticle 3005(A).
After the pipe has been laid, the backfill material shall be carefully placed so that the pipe will not be disturbed by the backfilling operation. All earth backfill material shall be firmly tamped.
Outlet pipe shall meet the requirements of Article 1044-7. The SCH-40 pipe and fittings shall be solvent cemented together. The HDPE pipe shall be connected with watertight neoprene connectors which are suitable for gravity flow conditions. All pipe fittings shall be connectors which are suitable for gravity flow conditions. All pipe fittings shall be approved by the Engineer prior to delivery. The open end of all outlet pipes shall be protected with a galvanized rodent screen as shown in plans or as approved by the Engineer.
Where pipe is not placed in a trench the amount of subdrain fine aggregate material placed over and around the pipe shall be as directed by the Engineer.
The subdrains shall be connected to existing drainage structures or to concrete pads at the outlet end of the subdrain. The concrete pad shall be constructed in accordance with Section 825 and shall be given an ordinary surface finish. Class B concrete shall be used.
Markers shall be constructed in accordance with the plans and shall be used at all concrete pads.
(A) Excavation:
The quantity of excavation to be paid for will be the number of cubic yards of material, measured in its original position, which has been excavated with the authorized pipe trench limits. The authorized trench width will be the width shown on the plans or as directed by the Engineer. The authorized trench depth will be the depth established by the Engineer.
(B) Subdrain Fine Aggregate:
The quantity of subdrain fine aggregate to be paid for will be the number of cubic yards of subdrain fine aggregate, measured in place within authorized limits, which has been used as backfill. The authorized trench limits will be the same as those limits used in the measurement of excavation. Where the subdrain fine aggregate has not been placed in a trench, measurement will be based on the dimensions established by the Engineer.
(C) Pipe:
The quantity of pipe to be paid for will be the actual number of linear feet of pipe which has been incorporated into the completed and accepted work. Measurement will be made along the pipe installation, excluding fittings, to the nearest 0.1 of a foot.
(D) Wyes, Tees, and Elbows:
The quantity of wyes, tees, and elbows to be paid for will be the actual number of these fittings which have been incorporated into the completed and accepted work.
(E) Concrete Pads:
The quantity of concrete pads to be paid for will be the actual number of pads which have been completed and accepted.
(A) Excavation:
The quantity of excavation, measured as provided in Subarticle 8154(A), will be paid for at the contract unit per cubic yard for "Subdrain Excavation."
(B) Subdrain Fine Aggregate:
The quantity of subdrain fine aggregate, measured as provided in Subarticle 8154(B), will be paid for at the contract unit price per cubic yard for "Subdrain Fine Aggregate."
(C) Pipe:
The quantity of pipe, measured as provided in Subarticle 8154(C), will be paid for at the contract unit price per linear foot for "________Inch Perforated Subdrain Pipe and ______ Inch Outlet Pipe."
(D) Wyes, Tees, and Elbows:
The quantities of wyes, tees, and elbows, measured as provided in Subarticle 8154(D), will be paid for at the contract unit prices each for "________Inch Subdrain Pipe Wyes, Tees, and Elbows."
(E) Concrete Pads:
The quantity of pads, measured as provided in Subarticle 8154(E), will be paid for at the contract unit price each for "Concrete Pad for Subdrain Pipe Outlet".
(F) Compensation:
The above prices and payments will be full compensation for all work covered by this section including but not limited to furnishing, hauling, and placing all pipe, fittings, subdrain fine aggregate, concrete, and other materials; making all joint connections; cutting into and making connections to existing drainage structures; removing existing paved ditches; grouting around the pipe where it enters existing drainage structures; pavement and vertical markers; and all excavation and backfilling.
(G) Pay Items:
Payment will be made under:
Subdrain Excavation Cubic Yard
Subdrain Fine Aggregate Cubic Yard
________Inch Perforated Subdrain Pipe Linear Foot
________Inch Subdrain Pipe Wyes, Tees, and Elbows Each
Concrete Pad for Subdrain Pipe Outlet Each
___ Inch Outlet Pipe Linear Foot