Section 808
8-11 Payment will be made under:
Pay Item Pay Unit Right -of-Way Markers Each Control -of-Access Markers Each SECTION 808 OBLITERATION OF EXISTING ROAD
808-1 Description
The work covered by this section consists of the obliteration of an existing road outside of the construction limits.
808-2 Construction Methods
Remove any existing pavement as directed. Fill or grade and shape the entire roadway to a degree t hat will blend with the adjacent topography and suitable for the application of vegetative cover.
808-3 Measurement and Payment
Removal of Existing Asphalt Pavement and Removal of Existing Concrete Pavement will be measured and paid in accordance with Article 250 -3. The work includes , but is not limited to , all breaking up, removing, and disposing of pavement; all plowing of the roadbed; and all grading and excavation necessary to reshape the roadway. All materials excavated in obliterating the abandoned roadway will be paid at the contract price for Unclassified Excavation in accordance with Article 225 -7. Any additional material that is required to complete the reshaping of the roadway will be paid at the contract unit price for Unclassified Excavation in accordance with Article 225 -7 or at the contract unit price for Borrow Excavation in accordance with Ar ticle 230 -5, depending on the source of the material. All seeding and mulching performed on obliterated areas will be paid at the contract unit prices for the items established in the contract.
815-1 Description
Construct subsurface drains, underdrains, blind drains and other types of drains in accordance with the contract or as directed by the Engineer . Install painted markers t o locate concrete pads for drains as shown in the plan s. This section does not apply to shoulder drains ; see Section 29 816.
815-2 Materials
Refer to Division 10. Item Section Geotextile for Subsurface Drains, Type 1 1056 Pavement Marker Paint 1087 Portland Cement Concrete, Class B 1000 Select Material, Class V 1016 Steel Marker Paint 1080 -11 Steel Markers 1072 -2 Subsurface Drainage Materials 1044 Use Class B concrete for concrete pads. Provide Type 1 geotextile for filtration geotextiles. Provide subdrain coarse aggregate for subsurface drains and subdrain fine aggregate for
8-12 underdrains and blind drains. For drain pipes, use pipes with perforati ons that meet Article 1
1044 -6 or 1044- 7.
815-3 Construction Methods
Excavate trenches as necessary in accordance with the contract or as directed. Install blind drains at a de pth of 4 to 6 f eet below subgrade elevation. Install subdrain pipes for subsurface drains and underdrains at a depth of 4 to 6 f eet below subgrade elevation unless the subgrade will be proof rolled. For subsurface drains and underdrains in subgrades that will be proof rolled, install subdrain pipes at a depth of 6 f eet below subgrade elevation. Do not leave filtration geotextile s exposed for more than 7 days before covering with material. For subsurface drains, line trench with filtration geotextile s and overlap adjacent geotextile s at least 18 inches . Overlap geotextile closures on top of subdrain coarse aggregate at least 6 inches and secure with mechanical ties. Install continuous perforated drain pipes with perforations point down. Provide subdrain pipes with positive drainage towards outlets. Firmly connect subdrain pipes together as needed. Place perforated subdrain pipes with perforations down except for pipes in dry materials, in which case turn perforations up or use non- perforated pipes. For concrete pipes in dry materials, construct joi nts that meet Subarticle 300 -6(A). Place subdrain aggregate beneath, around and over subdrain pipes such that pipes are covered by at least 6 inches of aggregate unless shown otherwise in the plan s. Do not displace or damage subdrain pipes while placing a nd compacting subdrain aggregate. Lightly compact backfill material such that settlement is minimized. Use solvent cement for connecting Schedule 40 PVC outlet pipes and fittings such as wyes, tees and elbows. Provide connectors for outlet pipes and fitt ings that are watertight and suitable for gravity flow conditions. Cover open ends of outlet pipes with rodent screens as shown in the plan s. Connect drains to concrete pads or existing drainage structures at ends of outlet pipes. Construct concrete pads and provide an ordinary surface finish in accordance with S ection 825. Install steel and pavement markers at concrete pads as shown in the plan s. Allow drains to function for up to 30 days or a sufficient time as determined by the Engineer before undercutting, proof rolling or constructing embankments over drains.
815-4 Measurement and Payment
Subdrain Excavation will be measured and paid in cubic yards. Excavation will be me asured based on the trench width shown in the plan s or approved by the Engineer and the actual trench depth as determined by the Engineer. The contract unit price for Subdrain Excavation will be full compensation for excavating trenches and backfilling ab ove subdrain aggregate. Geotextile for Subsurface Drains will be measured and paid in square yards. Filtration geotextile s in a trench will be measured in place based on the subdrain aggregate width shown in the plan s or approved by the Engineer and the a ctual aggregate depth as determined by the Engineer. No additional payment will be made for overlapping geotextile s. The contract unit price for Geotextile for Subsurface Drains will be full compensation for supplying, transporting and installing filtration geotextile s and mechanical ties . Subdrain Fine Aggregate and Subdrain Coarse Aggregate will be measured and paid in cubic yards. Subdrain aggregate in a trench will be measured in place based on the aggregate width shown in the plan s or approved by the Engineer and the actual aggregate depth as determined by the Engineer. When subdrain aggregate is not placed in a trench, aggregate will be measured in place based on the aggregate dimensions shown in the plan s or as determined by the Engineer. The contract unit prices for Subdrain Fine Aggregate and Subdrain Coarse Aggregate will be full c ompensation for furnishing, hauling, handling, placing, compacting and maintaining subdrain aggregate.