204Shoulder Rehabilitation

204.01 Description This work shall consist of rehabilitating existing shoulders by

grading and compacting shoulders, and furnishing, placing, grading and compacting new shoulder aggregate to required grade.

204.02 Aggregates New shoulder aggregate for shoulder rehabil itation shall be

material meeting the requirements of Section 703.10 - Aggregate for Untreated Surface Course and Leveling Course or Section 703.06 b. - Aggregate for Subbase, Type D. New shoulder aggregate for add shoulder aggregate shall be mat erial meeting the requirements of Section 703.11 - Aggregate for Shoulders or Section 703.06 b. - Aggregate for Subbase, Type D. New shoulder aggregate used for shoulder rehabilitation or add shoulder aggregate will not be required to pass the Washington State Degradation Test.

204.03 Existing Shoulder The existing shoulder for rehabilit ate shoulder shall be

prepared by grading with power equipment to provide a surface on which to place an aggregate course. All sod, tar-penetrated strips and other unsuitable material shall be removed to the extent required by the Resident. Suitable excavated granular material may 2-31 be used to fill low areas and to widen out to provide a uniform shoulder width as required. Where required by the Resident the edge of the existing traveled lane shall be cut to provide a uniform edge. For proposed paved shoulders the surface of the existing shoulder shall be graded and compacted approximately parallel to the proposed finished paved shoulder surface. Surplus material shall be incorporated into embankments or dis posed of in an approved waste area. Add new shoulder aggregate to existing shoulders shall be to t he widths and grades that are required by the typical sections.

204.04 New Aggregate After prep aration of the existing shoulder and where the

thickness of new shoulder aggregate for rehabilitated shoulders to be placed exceeds 4 inches, material meeting the requirements of Aggregate for Subbase, Type D or Aggregate for Untreated Surface Course shall be placed to the required grade. Where the thickness of new shoulder aggregate to be placed is 4 inches or less, material meeting the requirements of Aggregate for Untreated Surface Course shall be used. The Contractor may, at their option, grade the existing shoulders to an elevation of 4 inches or more below the proposed finished gravel surface and place material meeting the requirements of Aggregate for Subbase, Type D, full depth. Where the thickness of new shoulder aggregate for add shoulder aggregate shoulders to be placed exceeds 4 inches, material meeting the requirements of Section 703.06(b) Aggregate for Subbase, Type D, or Section 703.11 - Aggregate for Shoulders shall be placed to the required grade. Where the thickness of new shoulder aggregate to be placed is 4 inches or less, material meeting the requirements of this provision shall be used. The Contractor may, at their option, grade the existing shoulders to an elevation of 4 inches or more below the proposed finished gravel surface and place material meeting the requirements of Section 703.06 Aggregate for Subbase, Type D full depth

204.05 Surface Tolerance The completed surface of the rehabil itated shoulder shall

be shaped and maintained to a tolerance, above or below the required cross sectional shape of ⅜ inch. The completed surface of the add shoulder aggregate shoulder s hall be shaped and maintained to a uniform machine finish.

204.10 Method of Measurement The quantity of rehabilitation o f existing shoulders

and add shoulder aggregate measured for payment will be the number of square yards shown in the Schedule of Items in the contract. This quantity will be considered final, and no adjustments wil l be made, except when the quantity shown in the Schedule of Items is added to or deducted from, when changes to the plans are made by the Resident. 2-32

204.11 Basis of Payment The accepted quantity of rehabilitati on of existing

shoulder will be paid for at the contract unit price per square yard. No adjustment will be made to the quantity for payment, except as described under Method of Measurement above. Payment will be full compensation for cutting the edge joint, removing pavement, curb and other unsuitable material, grading and compacting the existing shoulder, disposing of surplus and unsuitable material, and for furnishing, placing, grading, and compacting new aggregate to the required depth, suitable for paving at the time of paving. The accepted quantity of Add Shoulder Aggregate to existing sh oulder will be paid for at the contract unit price per square yard. No adjustment will be made to the quantity for payment, except as described under Method of Measurement above. Payment will be full compensation for furnishing, placing, grading, and compacting new aggregate to the required depth. Additional material required as a result of cross-slope varian ce of the pavement surface will not be paid for directly, but will be considered incidental to the contract unit price per square yard of rehabilitation of existing shoulder. Grading, furnishing and placing loa m, seed and mulch in required waste areas will be considered incidental to the contract and no separate payment will be made. Payment will be made under: P a y I t e m P a y U n i t

204.20 Add Shoulder Aggregate to Existing S q u a r e Y a r d

S houlder, Plan Quantity

204.41 Rehabilitation of Existing Shoulder, Plan Quantity S quare Yard