4-30 the temperature range specified in Section 702.05 - Application Temperatures. The rate of application and areas to be treat ed will be specified in the co ntract. When traffic is maintained, one-way passage of vehicles will b e maintained on the untreated portion of the roadway. Bituminous tack coat shall n ot be placed on any surface where traffic will be force d to travel upon the uncovered tack coat. All tack coat shall be covered on the day it is applied. Care shall be taken so that the application of the bituminous tack coat at the junction of spreads is not in excess of t he specified amount. Skipped a reas and deficiencies shall be corrected as directed.
409.08 Method of Measurement Unless otherwise specified, bitu minous tack coat
will be measured by the gallon. All quantity determinations wi ll be made in accordance with Section 108 - Payment.
409.09 Basis of Payment The accepted quantity of bituminous t ack coat will be paid
for at the contract unit price per gallon for the designated ty pe of material complete in place. Payment will be made under: Pay Item P a y U n i t
409.15 Bituminous Tack Coat, Applied Gal lon
SECTION 410 - BITUMINOUS SURFACE TREATMENT Reserved SECTION 411 - UNTREATED 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 a pproved base in accordance with these specifications and i n reasonably close conformity wi th 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 eve nly in one layer upon the
prepared base course to a depth that will insure the required d epth after being compacted. 4-31 The aggregate, when spread, shall be well graded with no pocket s 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 compacti ng 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 bin der material shall be uniformly incorporated into the surface material by means of ha rrowing or by other methods capable of obtaining satisfactory results. The amount added sh all 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 sectio nal shape.
411.06 Leveling Course When Aggregate Leveling Course for fine grading aggregate
base and subbase course is called for, it shall be placed, meas ured 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 it em to be measured by truck measure. When measured in place, the width and thickness for m easurement 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 acco rdance with Section 108 - Payment. When designated by pay item to be measured by truck m easure, the measurement will be in vehicles at the point of delivery as shown on delive ry 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 measu re in place, may be measured in vehicles at 80% of the number of cubic yards accepted and us ed, 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, exca vating, crushing and screening when necessary, hauling, placing, compacting and othe r necessary processes which are required to furnish acceptable material under this it em.