605Underdrains

604.05 Basis of Payment . Structural concrete, reinforcing steel, and brick masonry will

be paid for at the respective contract unit price in accordance with Subsections 601.05, 602.05, or 611.05 as applicable. Precast Manholes will be paid for at the contract bid price per linear foot of depth, which price shall be full compensation for all necessary excavation, sheeting, cribbing, shoring, bracing, well-pointing, furnishing and assembling all elements of the manhole including concrete bases and covers except metallic cover and frame, for all other items of work necessary and incident to the complete construction and for all equipment, labor, tools and incidentals necessary to complete the work. Castings and gratings will be paid for at the contract unit price per pound for castings or gratings, complete in place, which prices shall be full compensation for completing the work. Payment will be made under: 604-A: Castings - per pound 604-B: Gratings - per pound 604-C: Precast Manhole, ___" Diameter - per linear foot SECTION 605 - UNDERDRAINS

605.01 Description . This work consists of furnishing all materials and constructing

underdrains in accordance with these specifi cations and in reasonably close conformity with the lines and grades indicated on the pl ans or established by the Engineer; furnishing materials and constructing filter beds as specified; furnishing materials and constructing drainage structures; and furnishing and installing plastic pipe drain structure and drain structure outlets, vents and miscellaneous appu rtenances as shown on the drawings in the plans, and as specified herein. This work al so includes the video inspection and reporting of drain system installation.

605.02 Materials .

605.02.1 Drain Tile and Pipe . Drain tile and pipe shall be of the classes and sizes

indicated and shall meet the require ments of the following Subsections: Bituminous Coated Corrugated Aluminum Alloy Pipe for Underdrains ................. 709.13 Bituminous Coated Corrugated Metal Pipe for Underdrains ................................... 709.07 Concrete Drain T ile ................................................................................................. 708.06 Corrugated Aluminum Pipe for Underdrain s ........................................................... 709.10 Corrugated Metal Pipe for Underdrains ................................................................... 709.06 Corrugated Polyethylene Dr ainage Tubing .............................................................. 708.19 Geotextile ................................................................................................................. 714.13 Perforated Concrete Pipe ......................................................................................... 708.05 Plastic Pipe for Unde rdrains .................................................................................... 708.18 Polymer Coated Corrugated Metal Pipe for Underdra ins ........................................ 709.08 Porous Concrete Pipe ............................................................................................... 708.07 Semi-circular Perforated Plastic Pipe for Underdra ins ............................................ 708.20

605.02.2 Material for Bedding and Covering . Bedding and covering material shall

conform to the requirements of Section 704. Unless otherwise specified, Type C shall be used.

605.02.3 Appurtenances . Appurtenances such as flush- out units, small animal guards,

signs, etc. shall be as shown on the plans and shall be of new, good commercial quality materials approved by the Engineer.

605.02.4 Edge Drain Pipe and Fittings.

605.02.4 1--General. Pipe for edge drains and fittings shall be four-inch nominal size, and

shall be either Schedule 40 or Schedule 80 polyvinyl chloride (PVC) plastic pipe conforming to the requirem ents of ASTM D 1785. Fittings, except for "Y" fittings, shall be socket-type fittings conforming to the requirements of ASTM D 2467 for Schedule 80 pipe and ASTM D 2466 for Schedule 40 pipe. The Contractor may elect to furn ish one of the following perforated pipe in lieu of the pipe listed above. Regardless of the pipe used, it shall be four-inch nominal size.

605.02.4 2--Untreated Permeable Material . The untreated permeable material used to

backfill the edge drain pipe and outlet/vent tr enches shall be Type 57 filter material and shall conform to the requirements of Subsection 703.03, Coarse Aggregate for Portland Cement Concrete, for Size 57 coarse aggregate. The type of aggregate may also be slag or granite. Mixing of different types of aggregate will not be permitted. 605.02.4.3--Filter Fabric . The filter geotextile used with edge drains and edge drain outlets shall be Type V geotextile meeting the requirements of Subsection 714.13.

605.02.4 4--Miscellaneous. Concrete for aprons shall be Class "C" concrete meeting the

requirements of Subsection 804.02.10. Mortar placed where edge drain outlets and vents connect to drainage pipes and existing drainage inlets shall conform to the provisions of Subsection 714.11.5, Masonry Mortar, except that the sand and cement shall be commercial quality.

605.02.5 Prefabricated Sheet Drain.

605.02.5 1--General. Prefabricated sheet drain shall be geocomposite drainage material

with a high compressive strength molded core and non-woven geotextile fabric attached to both sides of the core to provide soil in trusion protec tion for subsurface drainage interception. Prefabricated sheet drain shall be on e listed on the Department’s APL.

605.02.5 2--Marking, Shipment, and Storage. Each roll or container of prefabricated

sheet drain shall be visibly labeled with the name of the manufacturer, trade name of the product and quantity of the material. During shipment and storage the prefabricated sheet drain shall be protected from direct sunlight, and temperatures above 120°F or temperatures below 0°F. The prefabricated sheet drain sha ll be maintained in a heavy duty protective covering and elevated, limiting soil and water contact. Prolonged storage requires storage in a safe enclosed area to protect it from damage.

605.03 Construction Requirements .

605.03.1 Pipe Installation .

605.03.1 1--Preparation of Trench . Trenches shall be excavated to the dimensions and

grade shown on the plans or as directed. In the event the dimensions of the trench are not indicated on the plans, the trench shall be at least as wide as the outside diameter of the pipe plus eight inches on each side, and shall be of sufficient depth to allow proper installation of the pipe and covering. If bell and spigot pipe is used, recesses shall be cut to allow uniform bearing of the pipe on the bottom of the trench.

605.03.1 2--Pipe Laying .

605.03.1 2.1--General . Except where settlement occurs due to reasons beyond the control

of the Contractor, the Contractor shall be responsible for the alignment and grade of pipe underdrains. Where settlement occurs due to improper excavation, bedding or backfill, negligence, or carelessness on the part of the Contractor, the pipe shall be taken up and properly relaid or replaced without extra compensation.

605.03.1 2.2--Drain Tile . Drain tile shall be firmly embedded on the bottom of the trench,

conforming to line and grade, and with the ends approximately 1/4 inch apart. If, in the judgment of the Engineer, the soil is of such a composition that it will wash into the joints, the joints shall be wrapped with strips of tar paper approximately four inches wide. Bedding or cover material shall then be placed around the paper to prev ent its displacement. No additional compensation will be allowed for this operation.

605.03.1 2.3--Bell and Spigot Type . Concrete pipe of the bell and spigot type shall be

firmly embedded on the bottom of the trench, with the bell ends upgrade, and shall have close fitting joints. No mortar will be required in the joints.

605.03.1 2.4--Perforated Pipe . Unless otherwise indicated on the plans, perforated pipe

shall be laid with the perforated side down. Unless otherwise specified, perforated pipe shall be laid on a four-inch bed of approved filter material.

605.03.1 2.5--Corrugated Metal Pipe . Corrugated metal pipe shall be laid with the

separate sections firmly joined together by connecting bands of an approved type.

605.03.1 2.6--Laterals . Laterals and other connections shall be made with suitable special

sections.

605.03.1 2.7--Dead Ends . Dead ends of pipe underdrains shall be closed with a suitable

plug of concrete or prefabricated end cap placed around the end of the pipe to prevent soil and/or water intrusion.

605.03.1 2.8--Underdrain Outlets . When indicated on the plans non-perforated

underdrain outlets shall be joined to the underdrains.

605.03.1 3--Appurtenances . Underdrain appurtenances such as elbows, “T” and “Y”

connections, flush-out units, small animal guards, signs, etc. shall be constructed in accordance with the details shown on the plans an d shall be of good quality workmanship.

605.03.1 4--Pipe Covering. After the pipe underdrain has been laid, it shall be covered

immediately with the specified filter material to the dimensions shown on the plans. The remainder of the trench, if any, shall be f illed with the specified material, placed in six- inch layers, and compacted to the specified density.

605.03.2 Blind Drains . Trenches for blind drains shall be excavated to the width and

depth shown on the plans. The trench shall be filled with filter material to the depth required by the plans. The remaining upper po rtion of trench shall be filled with either granular or impervious material as specified. All filling material shall be thoroughly compacted, and if under the pavement structur e the material shall be compacted to the density specified in the contract.

605.03.3 Combination Storm Drain and Underdrain . Where the plans indicate that a

conduit is to serve as a combination storm drain and underdrain, the conduit shall in general be constructed in accordance with Section 603. Modifications of Section 603 to provide that the conduit also serve as an underdrain shall be performed under this section. Modifications shall be as shown on the plans. The Contractor shall carefully grade and shape the compacted backfill for the lower portion of the pipe so that water entering the filter material will be adequately drained into the unsealed portion of the joints. In no case shall the surface of the compacted backfill be below the sealed portion of the joints. After the lower portion of the joint has been backfilled, compacted, and shaped as indicated above, filter material shall be placed for the full depth shown on the plans. Each layer of filter material shall be compacted to the satisfaction of the Engineer. Upon completion of the placement and compaction of the filter material, superimposed materials shall be placed immediately, or a temporary covering of approved material shall be placed and compacted in order to prevent un necessary infiltration of loose material into the upper portion of the filter material. Should appreciable contamination occur because of failure to adequately protect the surface of the filter material, that portion of the work considered to be unsatisfactor y shall be removed and replaced with satisfactory work at no additional cost to the Department. If temporary materials used to protect the upper portion of the filter material do not meet the requirements for the superimposed course , the temporary materials shall be carefully removed to expose clean filter materials imme diately prior to placem ent of the required superimposed course.

605.03.4 Filter Beds . Excavation for filter beds shall be made to the elevation and

dimensions indicated on the pl ans. The surface of the excava ted area on which the filter bed is to be placed shall be smooth, firm, an d well drained. Filter material of the types shown on the plans shall be placed, thoroughl y compacted, and shaped to the dimensions indicated on the plans. Unless otherwise specif ied, compaction shall be to the satisfaction of the Engineer. When impervious material or other materials are specified to be placed over the filter material, the compacted filter material shall be covered as soon as practicable with this material and compacted to the required design soil density in accordance with Section 203. 605.03.5--Edge Drain Installation. Edge drains, edge drain outlets, vents, untreated permeable material, and filter geotextile shall be installed in accordance with the details shown on the plans or in the contract documents, as specified herein and applicable contract documents. The vertical tolerance (height) for the trench shall be plus or minus one-half inch. The horizontal tolerance (width) shall be plus one inch. Surfaces to receive filter fabric, immediately pr ior to placing, shall be free of loose or extraneous material and sharp objects that may damage the filter geotextile during installation. The geotextile shall be stretched, aligne d and placed in a wrinkle-free manner. Adjacent rolls of the geotextile shall be overlapped from 12 to 18 inches. The preceding roll shall overlap the following roll in the direction the material is being spread. Should the geotextile be damaged during placing, the torn or punctured section shall be either completely replaced or shall be repaired by placing a piece of geotextile that is large enough to cover the damaged area and to meet the overlap requirement. Damage to the geotextile resulting from the Contractor's vehicles, equipment or operations shall be replaced or repaired by the Contractor at no additional cost to the State. Pipe and fittings shall be joined by solvent cementing with commercial quality solvent cement and primer specifically manufactured for use with rigid PVC plastic pipe and fittings. The solvent cement and primer used shall be made by the same manufacturer. The color of the primer shall contrast with th e color of the pipe and fittings. The solvent cement and primer shall be used in accordance with the manufacturer's printed instructions. When corrugated polyethylene drainage tubing is used, joints shall be made with snap-on or split couplings, corrugated to engage the pipe corrugations, and shall engage a minimum of four corrugations, two on each side of the pipe joint. When poly vinyl chloride corrugated sewer pipe is used, joints shall be made in accordance with the pipe manufacturer's recommendations and ASTM F 949. The backfill of the trench along the pavement edge, across the shoulder and outside the shoulder shall be as shown in the details of the drawings. The Contractor may dispose of the trenched materials on the slopes provided all material passes a three-inch ring and blends into the existing or reconstructed roadway slopes. Otherwise, the material must be disposed of outside the right-of-way. The edge drain and edge drain outlets and vent s shall be clean at the time of installation and shall be free of obstructions after installation. 605.03.6--Edge Drain Inspection. The edge drain system shall be inspected by the Contractor after all roadway construction items are completed within a given section of roadway. A video record and written report for each line inspected shall be furnished to the Engineer. The line location (station numbe r), distance traversed by the camera, and pipe deficiency shall be recorded on a compact disc or other approved media and in a written report. As a minimum, fifty percent (5 0%) of the entire edge drain system shall be video inspected. Video inspection shall be performed in the presence of the Engineer or the Engineer’s representative. Video equipment used for inspecting the edge drain system shall be capable of the following minimum requirements:

605.03.7 Prefabricated Sheet Drain. Prefabricated Sheet drai n shall be placed in the

areas designated and as directed in the plans. Unless otherwise directed by the Engineer, the prefabricated sheet drain may be insta lled longitudinally, either horizontally or vertically, in the direction of flow. Prefabricated sheet drain shall be placed on a smooth soil surface, free of sharp objects or protrusions. Prefabricated sheet drain material shall be pinned or otherwise secured in place prior to cover placement. A 12-inch cover thickness is required prior to equipment trafficking. No equipment shall be permitted directly on the material. Begin cover placement at the lowest relative grade level to reduce material displacement. Cover placement shall begin immediately, or otherwis e protected from ultr aviolet degradation. Material overlap(s), when required, shall be sh ingled with the upper gradient prefabricated sheet drain above the lower gradient prefabri cated sheet drain providing a minimum 6-inch overlap, unless otherwise directed on the plans. Duct tape shall be used to secure material overlaps.

605.04 Method of Measurement . Tile or pipe underdrains, including all special sections

and connections, and blind drains will be measured from end to end by the linear foot along their center lines. Appurtenances, specified as pay items, will be measured by the unit indicated. All necessary appurtenances not listed as pay items will not be measured for separate payment. Excavation for pipe underdrains will be measured and paid for under the provisions of Section 206 for the widths shown on the plans. Excavation for blind drains and filter beds will be measured and paid for in accordance with the provisions of Section 203. Measurement and payment for cond uit required to be used as combination storm drain and underdrain will be made in accordance with Sec tion 603, except for those features modified as provided in this section. Measurement of filter materials used in the construction of underdrains, combination storm drains and underdrains, and filter beds will be made as follows:

605.05 Basis of Payment . Tile and pipe underdrains and blind drains, measured as

prescribed above, will be paid for at the cont ract unit price per linear foot. Appurtenances listed as pay items will be paid for at the contract unit price for the units specified. Filter material for underdrains and combination storm drains and underdrains, measured as prescribed above, will be paid for at the contract unit price per cubic yard (FM). Filter material for filter beds, measured as prescr ibed above, will be paid for at the contract unit price per cubic yard (LVM) or ton. Excavation for tile or pipe underdrains will be paid for in accordance with the provisions of Subsection 206.05. Excavation for blind drains will be paid for in accordance with the provisions of Subsection 203.05. Geotextile for subsurface drainage, measured as prescribed above, will be paid for at the contract unit price per square yard. Edge drain and edge drain outlets/vents, measur ed as prescribed above, will be paid for at the contract unit price per linear foot, which price shall be full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in constructing edge drains and edge drain outlets/vents complete in place, including wire mesh covers, pipe and pipe fittings, couplings, untreated permeable material, geotextile fabric, granular material, bituminous pavement mixture, trenching, disposal of trenched materials and other miscellaneous appurtenance s as shown on the plans and as specified herein. Edge drain inspection, measured as prescribed above, will be paid for at the contract unit price per linear foot of edge drain and edge drain outlet/vent inspected, which price shall be full compensation for furnishing all labor, equipment, VHS tapes, tools and incidentals necessary to complete the work. Class "C" concrete for edge drain aprons as shown on the plans and as specified herein shall be paid for under Pay Item No. 221-A, Concrete Paved Ditch. Prefabricated sheet drains, measured as prescrib ed above, will be paid for at the contract unit price per square yard, which price shall be full compensation for all materials, installation, labor, tools, equipment, and incidentals necessary to complete the work. The prices thus paid shall be full compensation for completing the work. Payment will be made under: 605-A: ___" Concrete Drain Tile for Underdrains, Class____ - per linear foot 605-B: ___" Perforated Concrete Pipe for Underdrains, Class ____ - per linear foot 605-C: ___" Porous Concrete Pipe for Underdrains - per linear foot 605-D: ___" Perforated Corrugated Metal Pipe for Underdrains, Type ____ - per linear foot 605-E: ___" Non-perforated Corrugated Metal Pipe for Underdrains, Type_____ - per linear foot 605-F: ___" Bituminous Coated Perforated Corrugated Metal Pipe for Underdrains, Type____ - per linear foot 605-G: ___" Bituminous Coated Non-perforated Corrugated Metal Pipe for Underdrains, Type____ - per linear foot 605-H: Edge Drain - per linear foot 605-I: Edge Drain Outlets/Vents - per linear foot 605-J: Edge Drain & Edge Drain Outlet/Vent Inspection - per linear foot 605-K: Blank 605-L: Blank 605-M: ___" Perforated Corrugated Aluminum Pipe for Underdrains, Type____ - per linear foot 605-N: ___" Non-perforated Corrugated Aluminum Pipe for Underdrains, Type ____ - per linear foot 605-O: ___" Perforated Sewer Pipe for Underdrains, SDR ___ - per linear foot 605-P: ___" Non-perforated Sewer Pipe for Underdrains, SDR ___ - per linear foot 605-Q: ___" Perforated Corrugated Polyethylene Drainage Tubing for Underdrains - per linear foot 605-R: ___" Non-perforated Corrugated Polyethylene Drainage Tubing for Underdrains - per linear foot 605-S: ___" Semi-circular Pe rforated Plastic Pipe for Underdrains - per linear foot 605-T: ___" Perforated Pipe for Underdrains, Optional* - per linear foot * Meeting the requirements for Pay Item Numbers 605-B, Standard Strength; 605-D, Type III; 605-K, Type SJ or TJ; 605-M, Type III; 605-O, SDR 35, 41 or 42; 605-Q, or 605-S. 605-U: ___" Non-perforated Pipe for Underdrains, Optional** - per linear foot ** Meeting the requirements for Pay Item Numbers 605-E, Type III; 605-L, Type SJ or TJ; 605-N, Type III; 605-P, SDR 35, 41 or 42; or 605-R. 605-V: ___" Blind Drains - per linear foot 605-W: Filter Material for Combination Storm Drain and/or Underdrains, Type ___ - per cubic yard 605-X: Filter Material for Filter Beds, Type ____ - per cubic yard or ton 605-Y: Impervious Material, Type ____ - per cubic yard or ton 605-Z: Underdrain Appurtenances, Description - per lump sum, each, etc. 605-AA: Geotextile for Subsurface Drainage, Type ***, AOS *** - per square yard 605-BB: Prefabricated Sheet Drain - per square yard *** When not designated, see Subsection 714.13. SECTION 606 - GUARD RAIL

606.01 Description . This work consists of furnishing and erecting complete sections of

guard rail in accordance with th ese specifications and in reasonably close conformity with the lines and grades shown on the plans or established by the Engineer. This work shall also include the installation of reflectors on guard rail posts and the installation of guard posts. When the work requires the removal and replacement of guardrail on a facility opened to traffic, the materials necessary for replacement will be on hand before removal begins. The Contractor shall not begin work on any section of guardrail until preparations have been made to complete the installation of the section, including posts, rail, anchors, and hardware as a continuous operation. Once work has been initiated on a section, the work shall be prosecuted to its completion unless inclement weather or other conditions beyond the control of the Contractor interfere with the work. Uncompleted guardrail or special end sections shall not be left exposed to th e travelling public without the approval of the Engineer. If approval is granted, the uncompleted section must satisfactorily be marked with drums, barricades, or other devices, as directed by the Engineer, at no additional cost to the Department. In no case will uncomplet ed guardrail or special end sections be allowed to remain over a weekend or holiday period.

606.02 Materials . Unless otherwise specified, all materials shall conform to the

requirements shown on the plan s and set forth in Section 712. Reflectors shall be of the type, size, and color designated on the plans and shall conform to the requirements of