207 - Obliterating Roadway
GENERAL DESCRIPTION
Definitions of Terms
Concrete Pavement: Concrete pavement is a hard surface made of concrete, used in the construction of roads, runways, and other paved surfaces.
Grading: Grading is the process of adjusting the level of land, either by cutting or filling, to achieve the desired contour for construction purposes.
Hot Mix Asphalt (HMA): Hot mix asphalt is heated and placed at temperatures between 300 and 350 degrees Fahrenheit. It is primarily used for roads and pathways.
Mulch: Mulch is a layer of material applied to the surface of the soil, typically used to retain moisture, reduce erosion, and provide nutrients as it decomposes.
Scarify: Scarifying is the process of breaking up hard or compacted materials, typically the existing road surface, using an excavator with a bucket with teeth.
Topsoil: Topsoil is the uppermost layer of soil, usually the top 2 to 8 inches. It has the highest concentration of organic matter and microorganisms.
General Overview
Obliterating roadway is the process of removing or rendering unusable road sections (concrete or asphalt) that lie outside the new construction limits. This may include filling ditches, grading operations to blend the area with surrounding contours, or construction of naturally appearing obstructions to deter traffic use. Additionally, scarifying the obliterated roadway may be necessary along with topsoiling, seeding, fertilizing, and mulching the area to promote the natural growth of vegetation. This process ensures the landscape is rehabilitated and prevents environmental degradation that could result from abandoned roadways.
MATERIALS
All materials must meet acceptance requirements in the Materials Source Guide and be listed on the Contractor-provided Material Source Lists in the project files. The material used in this process plays a vital role by helping to ensure the area is returned to a naturally stable state. The choice and application of materials need to be planned carefully based on the environmental conditions and the specific requirements of the obliteration project.
Description of the Materials
Aggregate
Crushed stone and gravel (aggregate) can be used in the grading process to fill in ditches and level the area. These materials are often recycled from pavement or sourced separately. Refer to Subsection 302.03 and Subsection 303.03 of the Standard Specifications for Construction for information on the use of these materials.
Fertilizers
Fertilizers provide the necessary nutrients to support growth of new vegetation. Refer to Subsection 816.03.B of the Standard Specifications for Construction for detailed information on the use of fertilizers.
Granular Material
Granular material can be used for leveling and providing a base layer for other materials. Refer to Subsection 301.03 of the Standard Specifications of Construction for detailed information.
Organic Materials
Organic materials, such as topsoil and mulch, are used during the restoration process of an obliterated roadway.
Topsoil is spread over the obliterated area to support new plant growth. The high organic make of topsoil is essential to help new plants become established.
Mulch is applied over seeded areas to retain moisture, reduce erosion, and provide nutrients as it decomposes. Mulch can be organic (like wood chips or straw) or synthetic. It can be applied loose, combined in a blanket, or sprayed.
Refer to Section 816 of the Standard Specifications of Construction for material use.
Pictures of Materials
CONSTRUCTION
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MEASUREMENT AND PAYMENT
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