123 The subbase course shall be checked for proper thickness after final compa ction. The Contractor shall refill all test holes with approved material and adequately recompact the material. Any deficiency in total thickness of the subbase in excess of one ( 1) inch shall be corrected.
207.10 Shoulders :
Before any base or pavement may be placed upon the subgrade, the shoulders along and adjacent thereto shall be built to the dimensions shown on the cross section. In order to provide adequate side support for macadam or other ston e types of base or surface, shoulders shall be constructed full width, substantially to line and grade and to the depth of the course being constructed, and compacted with at least a 10 ton roller, and then trimmed to the required line. When concrete base or pavement is being constructed, or where the shoulders are to be built of stabilized material, these requirements may be waived by the Engineer. Upon completion of the base, pavement, or surfacing, the shoulders shall be finally shaped, dressed, and compacted to conform to the dimensions shown on the Plans. No stone exceeding three ( 3) inches in maximum dimension will be permitted within 3 inches of the surface. The outer edge of the shoulder shall be trimmed to a neat line parallel with the centerline of the roadway, and the entire surface rolled to within twelve ( 12) inches of the ou tside edge, refilling and rerolling any depressions that develop. Ditches and back slopes shall be finally cleaned and trimmed to line upon completion of the shoulder work. The in -place density of shoulders shall be as specified for the subgrade in Secti on 716.
207.11 Drainage :
When grading, subgrading, constructing shoulders, or placing base or pavement is suspended because of unsuitable weather or any other reason, suitable provisions shall be made to drain the grade, subgrade or shoulders by means of the construction of adequate side ditches and drains. The ditches and drains shall be kept open and maintained during the period of suspension, including the removal of slides. Upon failure of the Contra ctor to construct and maintain the temporary drains prior to the acceptance of the work, the Engineer may cause such work to be done by others, and the cost will be deducted from moneys due the Contractor. Upon completion of the subgrade or shoulders and before any base on pavement is placed, subgrade drains or weeps shall be placed as shown on the Plans or as directed by the Engineer in accordance with Section 606.
207.12 Temporary Surcharge :
When shown on the Plans or directed by the Engineer, a temporary surcharge composed of suitable compacted material from the "Unclassified Excavation" or "Unclassified Borrow Excavation" shall be placed after completion of the embankment to the elevations o f the base of the subgrade. The temporary surcharge shall be placed in accordance with location limits and elevations shown on the Plans or as directed by the Engineer. Surcharge material shall be placed in accordance with the provisions of 207.7. The f irst five ( 5) feet of the surcharge shall be compacted as specified for embankment in the applicable provisions of 716. The remaining surcharge shall be compacted as specified above except that the target percentage of dry density shall be 90 percent (90% ). The surcharge shall be maintained for the period indicated on the Plans or directed by the Engineer. 124 207.13 -PROTECTION OF CURTAIN WALLS : All bridges which will be used for permissi ble haulage, but which do not have the approach slabs constructed, shall have the pavement notch of the curtain walls built up to final grade by the use of timber to eliminate the possibility of damage to the curtain walls.
207.14 Slides and Slipouts :
Material outside the planned roadway or ditch slopes which, in the opinion of the Engineer, is unstable and constitutes a potential slide area, material from slides which has come into the roadway or ditch, and material which has slipped out of new or old embankments shall be excavated to designated lines or slopes either by benching or in such manner as directed by the Engineer. Such material shall be used in the construction of the e mbankments and in flattening of slopes, or disposed of as directed by the Engineer. Erosion, regardless of amount or extent, caused by the action of the elements and which results in damage to the work or materials shall in no case be considered a slide o r slipout.
207.15 Method of Measurement :
The quantity of work done will be measured in cubic yards for Item 207001 -*, "Unclassified Excavation", which shall be the material actually moved and disposed as herein prescribed, measured in its original position and determined from the cross sections by the method of average end areas. The quantity of unclassified excavation for payment will be the number of cubic yards as further described. The q uantities shall be computed using the cross section areas shown on the Plans with deductions from or additions to such cross section areas in accordance with Subsection 109.2 and authorized deviations. The quantity for payment will be to plan lines for ma terial excavated in accordance with the construction tolerance set forth in Subsection 207.3.1 except as provided. In no case where the tolerance line has not been reached will the quantity for payment exceed the quantity actually excavated; unless otherw ise authorized, the Contractor will be required to continue or resume excavation until within tolerance rather than receive payment for a lesser (out -of-tolerance) excavated quantity. No material removed beyond the slope lines or below the grade line show n on the Plans, except as provided in Subsection s 207.3.4 and 207.9, will be included for payment unless authorized in writing by the Engineer. Slides and material removed from beyond the slope lines, not attributable to carelessness, overshooting, or uns uitable construction methods on the part of the Contractor, will be included only when so authorized. Excavation below grade, including undercutting, as shown on the Plans or as directed by the Engineer; ditches to divert water from the slopes of cuts; in let and outlet ditches for drainage structures; other ditches as authorized be the Engineer; removal of topsoil, sod, old pavement, boulders, walls, and other unsuitable material within the areas upon which the embankment is to be placed; benching; and all other excavation authorized but not shown by the cross sections, will be measured separately and included for payment. Where stone base or concrete pavements have been scarified or broken but not removed, or slopes other than rock upon which embankments are to be made are plowed or scarified and the loose soil has been manipulated and compacted but not removed, such work and all the work of placing and compacting all embankments, widenings or waste pits, placing and consolidating rockfills, wi ll be considered as a necessary part of manipulation, the cost of which is included in the price bid per cubic yard for "Unclassified Excavation". Payment for placing of temporary surcharge will be included in the contract unit price for "Unclassified Ex cavation" or "Unclassified Borrow Excavation", as the case may be. Removal of temporary surcharge will be paid at the contract unit price for "Unclassified Excavation".