411Untreated Aggregate Surface Course

411.01 Description This work shall consist of constructing a surface course or

leveling course of untreated aggregate or crushed stone on an approved base in accordance with these specifications and in reasonably close conformity with the lines, grades, thickness and typical cross sections shown on the plans or established.

411.02 Aggregate Aggregates for untreated aggregate surface c ourse shall conform

to the requirements of Section 703.10 - Aggregate for Untreated Surface Course and Leveling Course Type A. Aggregates for crushed stone surface shall conform to the requ irements of Section

703.12 Aggregate for Crushed Stone Surface.

411.03 Placing The surface course material shall be spread evenly in one layer upon the

prepared base course to a depth that will insure the required depth after being compacted. 4-31 The aggregate, when spread, shall be well graded with no pockets of fine or coarse material and shall be bladed and shaped with a power grader.

411.04 Compaction Compacting shall be done with rollers, heav y construction

equipment or any combination capable of satisfactorily compacting the course. The Contractor shall maintain the moisture content of the material to attain the required compaction. When the aggregate surface material lacks sufficient fines to obtain compaction, binder material of an approved quality shall be added. The binder material shall be uniformly incorporated into the surface material by means of harrowing or by other methods capable of obtaining satisfactory results. The amount added shall not increase the total fines in the mixture to exceed the limits specified.

411.05 Surface Tolerance The entire surface shall be shaped a nd maintained to a

tolerance of ⅜ in above or ⅜ in below the required cross sectional shape.

411.06 Leveling Course When Aggregate Leveling Course for fine grading aggregate

base and subbase course is called for, it shall be placed, measured and paid for under the contract item for Untreated Aggregate Surface Course.

411.07 Method of Measurement Untreated aggregate surface cour se will be

measured by the cubic yard in place unless designated by pay item to be measured by truck measure. When measured in place, the width and thickness for measurement will be the width and thickness of aggregate surface as shown on the plans or as modified. The length will be along the centerline. All measurements will be in accordance with Section 108 - Payment. When designated by pay item to be measured by truck measure, the measurement will be in vehicles at the point of delivery as shown on delivery slips in accordance with Section 108.1.3 f. Aggregate surface course, designated by pay item to be measure d in place and used for driveways and other locations difficult to accurately measure in place, may be measured in vehicles at 80% of the number of cubic yards accepted and used, at the point of delivery as shown by delivery slips in accordance with Section 108.1.3 f. The quantity so measured shall not exceed 400 yd³ per contract. Aggregate for crushed stone, surface will be measured by the t on in accordance with Section 108 Payment

411.08 Basis of Payment The accepted quantities of untreated aggregate surface

course of the type specified will be paid for at the respective contract price per cubic yard. Payment shall include purchasing material, stripping pits, excavating, crushing and screening when necessary, hauling, placing, compacting and other necessary processes which are required to furnish acceptable material under this item. 4-32 Water added or fines added or both added to the material to ai d compaction and to prevent raveling will be at the Contractor's expense. Payment will be made under: P a y I t e m P a y U n i t

411.09 Untreated Aggregate Surface Course Cubic Yard

411.10 Untreated Aggregate Surface Course, Truck Measure Cub ic Yard

411.12 Crushed Stone Surface Ton

SECTIONS 412 - 418 VACANT