397 When grade and drain contracts are bid separa tely from paving contracts, the structure may be designated to be partially built by the grade and drain Contractor and later completed by the paving Contractor. When inlets or other drainage structures are to be constructed to Final Grade, as shown by the Plans, the Contractor shall provide positive drainage in coordination with their means and methods throughout the duration of the project to protect the roadway and all other areas that are within the limits of the project. There will be no direct payme nt by the Division for partial inlet construction or other intermediate drainage structure construction to maintain positive drainage that the contractor is in control of.
605.6 -PAY ITEMS : ITEM DESCRIPTION UNIT 605001 -* Type A Manhole Each 605002 -* Type B Manhole Each 605003 -* Type A Inlet Each 605004 -* Type B Inlet Each 605005 -* Type C Inlet Each 605006 -* Type D Inlet Each 605007 -* Type E Inlet Each 605008 -* Type F Inlet Each 605009 -* Type G Inlet Each 605010 -* Type H Inlet Each 605011 -* Type J Inlet Each 605012 -* Adjusting Inlet Type , “type” Each 605013 -* Adjusting Junction Box Each 605014 -* Modified Inlet, “type” Each 605015 -* Adjusting Manhole Type , “type” Each 605016 -* Modified Manhole, “type” Each 605020 -* Install Inlet Grate, “type” Each 605039 -* Junction Box Each 605040 -* “size” Perforated Slot Inlet Linear Foot 605041 -* “size” Slot Inlet Linear Foot 605050 -* Adjust Concrete Headwall Each 605051 -* Type U Inlet Each
* Sequence number
398 SECTION 606 UNDERDRAINS
606.1 -DESCRIPTION : This work shall consist of constructing underdrains and free draining base trenches using pipe and granular material, aggregate filled engineering fabric, and underdrain pipe outlets in accordance with these Specifications and in reasonably close conformity with the lines, grades, dimensions and locations shown on the Plans or established by the Engineer. When Item 606025, “size” Underdrain Pipe, is included as a pay item in the Contract, any of the following pipe types may be furnished for construction of the underdrain: corrugated polyethylene underdrain pipe , or PVC underdrain pipe.
606.1.1 -Free Draining Base Trench: This work shall consist of constructing free draining base trenches and Outlet Pipes in accordance with these specifications and in reasonably close conformity to Standard Details – Volume I with the lines, grades, dimensions, and locations shown on the plans or established by the Engineer.
606.2 -MATERIALS : The materials shall conform to the following requirements:
MATERIAL SUBSECTION TYPE OR GRADATION Concrete for Miscellaneous Uses 715.12 Corrugated Polyethylene Underdrain 714.19 Crushed Aggregate for Free Draining Base Trench 1 703.1, 703.2, 703.3, 703.4 AASHTO 57, 67, 357, or 467 Gravel for Aggregate Filled Fabric Underdrains 1 703.2 & 703.4 or 703.2.3 AASHTO #2 thru #57 or Pea Gravel Gravel for Underdrains 1 703.2 & 703.4 AASHTO Size # 57, 67, 7 or 78 Crushed Stone for Aggregate Filled Fabric Underdrains 1 703.1 & 703.4 AASHTO #2 thru #57 inclusive Crushed Stone for Underdrains 1 703.1 & 703.4 AASHTO Size # 57, 67, 7 or78 Engineering Fabric for Subsurface Drainage 715.11.4 Miscellaneous Concrete 715.12 Outlet Pipe 715.10.1.5 PVC Underdrain Pipe 714.20
1 Only one size may be used at any one installation.
When the locations of manufacturing plants allow, the plants may be inspected periodically for compliance with specified manufacturing methods, and material samples may be obtained for laboratory testing for compliance with material quality requirements. T his may be the basis for acceptance of manufacturing lots as to quality. All materials will be subject to inspection for acceptance as to condition at the latest practicable time the Engineer has the opportunity to check for compliance prior to or during i ncorporation of materials in the work.