207Topsoil

Topsoil

207.1DESCRIPTION

1 This section describes the requirements for removing, storing, and placing topsoil.

207.2MATERIALS

1 Topsoil is soil suitable for the growth of grass or other cover crops, reasonably free of hard dirt, clay, rocks, or other materials that would inhibit germination or growth. Provide topsoil that is a fertile, friable material; loam; or sandy clay loam. Do not provide topsoil that is saline or sodic or contains noxious weeds, toxic substances, stones or sticks greater than 1 in [25 mm] in diameter, or similar objectionable matter.

207.3EQUIPMENT—V acant

207.4CONSTRUCTION

207.4.1 General

1 Before stripping topsoil, clear and mulch overlying brush, grass, crops, and other suitable material, and incorporate them into the topsoil. Mulch the material by chopping with brush chopper or shredding with a rotary blade mower.

2 In this section the term “borrow source” refers to the source for topsoil materials. For borrow sources, adhere to the requirements of Subsection 106.3, Sources, Sites and Haul Roads.

207.4.2 Topsoil Storing

1 Topsoil storing consists of removing and stockpiling topsoil within the limits of the project, in uniform piles, and out of the way of other activities. Windrows are not acceptable piles.

2 Clear and grub stockpile sites in accordance with Section 201, Clearing and Grubbing. Ensure the sites are firm, smooth, and well drained.

207.

4.3Topsoil Placing

1 Before topsoil placement, construct embankment or cut slope areas to the specified lines and grades, and scarify all areas to a depth of approximately 6 in [150 mm]. Place topsoil to a uniform depth commensurate with the quantity available and the area to be covered.

Topsoil SECTION 207

2 After spreading, remove clods, stones, and other foreign materials that hamper effectiveness, appearance, or reclamation operations. Do not remove mulch.

3 When weather warrants, apply a fine spray of water to prevent topsoil erosion.

207.4.4 Topsoil Borrow

1 Topsoil borrow is topsoil either obtained from a borrow source outside the project limits and hauled directly to its final location or obtained within the limits of the project.

207.4.5 Topsoil Stripping and Placing

1 Remove topsoil from the edge of pavement out to the limits of grading, and store the topsoil out of the way of other activities . Windrows are permitted for storage. In areas where topsoil is minimal, strip a minimum of 4 in [100 mm] of material.

2 If work is alongside new paving, place topsoil after the plant mix pavement is completed. Replace topsoil in a manner that eliminates any drop off created by the paving operation. For all other operations, replace the topsoil in accordance to Subsection 207.4.3, Topsoil Placing.

207.5MEASUREMENT and PAYMENT

207.5.1 General

1 The engineer will measure:

of the borrow source. When Topsoil Borrow is handled repeatedly for the contractor’s convenience, no additional measurements will be made.

The department will pay royalty costs for Topsoil Borrow except when the topsoil is obtained from a contractor-furnished source.

volumetric measurements.

2.1Topsoil Storing. The quantity placed in stockpile will be the total quantity for

payment.

2.2Topsoil Placing. The difference between the quantity originally put in the

stockpile and the remaining quantity after all required placement , will be the total quantity for payment.

Topsoil SECTION 207

length of the topsoil removal. Measurement will include stripping and placing of the material. Separate measurements will be made for each side of the roadway.

2 Topsoil stripped from its original position within the project limits and placed directly in its final position will be measured as Topsoil Placing. Quantities will be determined from preliminary and final volumetric measurements of the stripped area.

3 The department will pay as follows:

Pay Item

Pay Unit Measure to the Nearest Pay to the Nearest Topsoil Borrow CY [m3] 0.1 ft [0.05 m] CY [m3] Topsoil Placing CY [m3] 0.1 ft [0.05 m] CY [m3] Topsoil Storing CY [m3] 0.1 ft [0.05 m] CY [m3] Topsoil Stripping and Placing MI [km] 0.01 mi [0.01 km] 0.01 mi [0.01 km]

207.5.2 Referenced Sections for Direct Payment

1 When specified, the engineer will measure and pay for W ater in accordance with