SECTION 120: EXCAVATION DESCRIPTION
120.20 : General
This work shall consist of excavation or disposal of all materials not being removed under some other item which is encountered within the limits of the Contract in accordance with the specifications and in close conformity with the lines, grades, thicknesses and cross sections shown on the plans or established by the Engineer. All excavation will be classified as “Earth Excavation,” “Class A Rock Excavation,” “Muck Excavation,” and “Unclassified Excavation,” as hereafter described. Materials from all classes of excavation which are unsuitable, and any surplus of suitable materials remaining after completing the formation of embankments, shoulders, approaches, widening of roadway or embankment slopes as directed or backfilling, will be known as waste and shall be disposed of by the Contractor outside the Right -of-Way at their responsibility and expense. Waste material shall not be disposed of in the flood channel areas of any stream. Existing concrete foundations, if not interfering with the proposed construction, may be abandoned in place with approval of the Engineer. Foundations under the roadway surface shall be removed to a depth of 3 ft below finished grade. Foundations outside of the roadway surface shall be removed to a depth of 1 ft below the proposed finished grade.
120.21 : Earth Excavation
Earth Excavation shall consist of all excavation not included as Class A Rock Excavation or excavation which is otherwise classified and paid for. Earth Excavation shall also include as incidental to the general work the removal and disposal of abandoned junk cars, trash, signs, fences, guardrail, guide posts, hot mix asphalt berms and debris of every nature.
120.22 : Class A Rock Excavation
When encountered within the limits of roadway or channel excavation. Class A Rock Excavation shall consist of:
1.Igneous, metamorphic and sedimentary rock which cannot be excavated without blasting or the use of rippers. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.11 202 4 Edition (2) All rock, stone, parts of stone, brick or cement concrete pavement, parts of cemented stone walls or masonry structures measuring 1 yd ³ or more that require blasting for removal.
120.23 : Muck Excavation
Muck excavation shall consist of the removal and disposal of saturated or unsaturated mixtures of soils and organic matter not suitable for foundation material regardless of moisture content.
120.26 : Unclassified Excavation
This work shall consist of all earth excavation as specified in 120.21: Earth Excavation , rock excavation as specified in 120.22: Class A Rock Excavation , and all other excavation not provided elsewhere in the contract. CONSTRUCTION METHODS
120.60 : General
A.Sequence of Operations When required, the Contractor shall so prosecute their work that traffic will be maintained over and through the work with a maximum of safety and convenience in accordance with the provisions of Subsection 7.09: Public Safety and Convenience. The sequence of all excavation operations, earth or rock, shall be such as to insure the most efficient utilization of excavated materials into embankments (as specified in Sub
EXCAVATION in other states
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