SECTION 221 - PAVED DITCHES
221.01 Description . This work consists of constructing paved ditches of hydraulic
cement concrete or hot bituminous plant mix, as specified in the contract and constructed in accordance with th e provisions and requirements of these specifications, and in reasonably close conformity w ith the lines, grades, typical cross sections, and locations shown on the plans or established.
221.02 Materials .
221.02.1 Concrete Paved Ditches . The materials used in the construction of cement
concrete paved ditches shall conform to the applicable provisions and requirements of Section 804.
221.02.2 Bituminous Paved Ditches . The materials used in the construction of
bituminous paved ditches shall conform to the applicable requirements for hot bituminous mixtures as set out in Section 401.
221.02.3 Reinforcement . Reinforcement shall meet the requirements of Subsection
711.02 221.03--Construction Requirements .
221.03.1 General . The foundation for paved ditches shall be formed by excavating to
the required depth and dimensions below the prepared finished surface grade of the paved ditch. The foundation shall be thoroughly compacted by hand tamping or other approved method. Soft, spongy, or other unsuitable material shall be removed as directed and replaced with suitable material thoroughly compacted in six inch layers. The forms used in this construction may be wood or metal; shall have a depth equal to the prescribed edge thickness of the paved ditch; and shall be of sufficient strength to withstand the weight of the concrete or bituminous mixture and the pressure incidental to vibration or compaction without bulging or displacement. Form s shall be securely staked and braced. Reinforcement, if specified, shall be placed in a manner that will ensure its proper position in the paved ditch section after all concrete is placed.
221.03.2 Concrete Paved Ditches . Unless otherwise specified on the plans, the
concrete paved ditches shall be constructed of Class "C" concrete, mixed and placed in accordance with the applicable requirements of Section 804, and cured in accordance with the requirements of Subsection 501.03.20 or by other approved methods. The limitations of mixing and placing shall conform to the requirements of Subsection
501.03 12.
A template mounted on the side forms shall be used in striking off and finishing the surface of the concrete to th e required shape and dimensi ons. The entire unit shall be constructed monolithic with smooth fillets or curves at all angles or breaks in flow lines. Concrete shall be placed beginning at the bottom of the slope and progressing upward. The finished exposed surface of concrete paved ditches shall be given a Class 6, Floated Surface Finish in conformity with the requirements of Subsection 804.03.19. Expansion joints shall be constructed at the locations indicated on the plans or directed, and shall be of the specified materials and dimensions.
221.03.3 Bituminous Paved Ditches . Bituminous paved ditches shall be constructed
using an asphalt mixture. The mixture shall meet job-mix requirements for the particular mixture used except the percent of asphalt cement designated in the job-mix formula may be increased by the Engineer by no more than two percent. The mixture shall be spread, raked, finished, and compacted by hand tools or other satisfactory methods while at the proper te mperature to form a smooth, stable, and impermeable lining. 221.03.4--Backfilling and Cleaning Up . After the concrete has set sufficiently or after the asphalt has been compacted to the required shape and dimensions, the forms shall be removed and the spaces around the paved d itch shall be backf illed with approved material and thoroughly compacted without damage to the paved ditch. The adjacent ditch slopes shall be neatly trimmed to the required section, and all surplus material shall be disposed of as directed.
221.04 Method of Measurement . Concrete paved ditch will be measured in cubic
yards. Bituminous paved ditch will be measured by th e ton of asphalt material actually placed. No measurement for separate payment will be made for any additional asphalt cement required in the mix. Excavation required for trenchin g and fine grading will not be measured for separate payment. Other required excavation will be measured for payment under the applicable excavation items.
221.05 Basis of Payment . Concrete paved ditch will be paid for at the contract unit
price per cubic yard and shall be full compensation for completing the work. Bituminous paved ditches will be paid for at the contract unit price per ton and shall be full compensation for completing the work. Payment will be made under: 221-A: Concrete Paved Ditch - per cubic yard 221-B: Bituminous Paved Ditch - per ton SECTION 223 - MOWING
223.01 Description. When the contract includes a pay item for mowing and when the
Engineer determines that mowing is necessary, the Contractor shall perform litter removal and mowing of noxious vegetation or excess growth as directed by the Engineer