136 and wing walls will not be permitted. Backfill over and around abutments, culverts, arches, and columns shall be brought up uniformly to avoid bending or distortional stresses in the structures, shall be made as soon as practicabl e after forms are removed, and shall be sloped to drain. The four ( 4) inch layer requirement and compaction for backfill in water will be waived. The testing of backfill compaction, at piers or other structures, which will not become part of an embankmen t or highway pavement or shoulder area will be waived. Select backfill material shall be place d behind abutments, wingwalls, retaining walls, and box culverts to the dimensions shown on the Plans. The material shall be placed in horizontal layers not to exceed four ( 4) inches compacted. The quality control testing and acceptance for the select backfill material shall be in accordance with applicable sections of 207 and 716. A lot shall normally consist of the quantity of backfill material required to fil l behind and around abutments, wingwalls, piers, bents, pedestals and all other structures as approved by the Engineer. The select backfill materials shall be tested according to MP 700.00.24. Five density tests shall be performed for quality control. T he target percentage of dry density shall be 95%. In all areas where select backfill will contact random material, engineering fabric shall be placed in accordance with the last paragraph of Subsection 207.9.
212.11 Method of Measurement :
The quantity of work done for Item 212001 -*, "Structure Excavation", Item 212002 -*, "Wet Excavation", Item 212003 -*, "Rock Excavation" and Item 212005 -*, "Select Material for Backfilling", will be the number of cubic yards measured. Any additional work be yond the scope of the Plans, authorized by the Engineer, will be measured in cubic yards for the excavated material removed or Select Backfill in place and paid for in accordance with the Subsection and 109.2. Measurement for "Structure Excavation" and "We t Excavation" will be limited to the volume bounded by vertical planes eighteen ( 18) inches outside the neat line of footings and parallel thereto; "Rock Excavation" will be limited to the volume bounded by the neat lines of the footings. When an increase in depth of foundation has been ordered by the Engineer, the excavation for the first five ( 5) feet or fraction thereof below the elevation shown on the Plans will be paid at the unit bid price. The Engineer may require the Contractor to make excavation to a depth greater than five ( 5) feet below Plan elevation in accordance with Subsection 104.3. All excavation performed under this section will be classified as "Structure Excavation", except as stated. When the Plans specify "Rock Excavation", all material encountered in the excavation requiring blasting for its removal and al l boulders greater the 1/2 cu. y d. in volume will be considered as "Rock Excavation" and be paid for as such. When a quantity of "Wet Excavation" is shown on the Plans, and a normal pool elevation is indicated, excavation below the normal pool elevation, except that classified as "Rock Excavation", will be considered "Wet Excavation" and will be measured below normal pool elevation from the stream bed to the bottom of the footings. The cost of bracing, shoring and supporting excavation adjacent to railroad tracks and other structures shall be included in the unit price bid for "Structure Excavation", "Wet Excavation", or "Rock Excavation". Structural excavation for old structures requiring removal will be limited to the outside dimensions of the structure. Excavation for the d rains specified in Subsection 212.9 will be paid as Item 212001 -*, "Structure Excavation", and the cost of backfilling drains with sand, crushed stone or gravel shall be included in the price bid for "Structure Excavation". 137 Clearing of right -of-way withi n the construction limits of piers, abutments, retaining walls, etc., and backfilling to the level of the original ground will be included in unit prices bid for "Structure Excavation", except that select material for backfilling will be paid for under Ite m 212005 -*. If backfill above original ground is required, material for the backfill will be measured and paid for as prescribed under Sections 207 or 211. The measurement and payment for engineering fabric will be included in the unit price bid for "Sel ect Material for Backfilling". Item 212004 -* "Cofferdams", will be measured and paid for each unit complete in place, including their removal, and shall include all labor, materials, and equipment incidental to the construction, pumping and removal. Prog ress payments, determined by the Engineer, may be made.
212.12 Basis of Payment :
The quantities, measured as provided above, will be paid for at the contract unit price bid for these ite ms, which prices and payments shall be full compensation for furnishing all materials and doing all the work prescribed in a workmanlike and acceptable manner, including all labor, tools, equipment, supplies, and incidentals necessary to complete the work, and also including cost of cofferdams and their removal, except when a separate bid item is provided for Item 212004 -*, "Cofferdams".
212.12.1 Price Adjustment: Select material for backfill not conforming with the
gradation requ irements as described in subsection 212.2.5 .3 will be paid for at the adjusted contract price base on the degree of nonconformance as specified in Table 212.12.1. TABLE 212.12.1 Adjustment of Contract Price for Gradation not Within Specifications Degree of Nonconformance Percent of Contract Price to be Reduced 1.0 to 3.0 2 3.1 to 5.0 4 5.1 to 8.0 7 8.1 to 12.0 11 Greater than 12 * * The Division will make a special evaluation of the material and determine the appropriate action.
212.13 Pay Items :
ITEM DESCRIPTION UNIT 212001 -* Structure Excavation Cubic Yard 212002 -* Wet Excavation Cubic Yard 212003 -* Rock Excavation Cubic Yard 212004 -* Cofferdam Each 212005 -* Select Material For Backfilling Cubic Yard * Sequence number SECTION 213 THROUGH SECTION 216 -BLANK