- 145 - SECTION 206 -- ROADWAY GRADING
206.01 Description
1."Roadway Grading" shall consist of furnishing, excavating, loading, hauling, placing, compacting, and finishing all materials necessary for the completion of the roadway, includi ng its embankments, intersections, driveways, and approaches as shown in the contract.
206.02 Material Requirements
1.Soils that are placed in embank ments and required in the roadway grading pay item shall meet the r equirements of Subsection 205.02.
206.03 Construction Methods
1.The Contractor shall construct the roadway as shown in the contract.
2.The Contractor shall maintain all areas during the construction operations so that they will be adequately drained at all times.
3.The Contractor shall remove all excess material. 4. The Contractor shall obtain borrow material as necessary to construct embankments.
5.The Contractor shall perform the excavation, placement, sloping, and finishing of soils as described in Section 205. The embankment shall be compacted to comply with the compaction requirements shown in the contract.
6.The Contractor shall obliterat e roads and shape the constructed areas to blend naturally with the surrounding areas.
206.04 Method of Measurement
1."Roadway Grading" will be measured for payment by stations of 100 feet (100 m), measured hor izontally along the cent erline of the project.
2.Deductions will be made for bridge floors 20 feet (6 m) or more in length.
3.Sections having roadway gradin g on only one side of the road shall be measured along the centerline of the project, and then the measured distance shall be divided by two to obtain the pay quantity.
4.No additional allowance will be made for the work required to complete intersection and driveway re turns, tapers, curv es, tangents, stubs, and other irregular areas.
206.05 Basis of Payment
1.Pay Item Pay Unit Roadway Grading Station (Sta) [Sta M]
2.When borrow and waste sites ar e obtained by the Department and shown in the contract and the Contract or elects to use other sites, the Contractor shall be charged with all costs incurred by the Department related to the sites shown in the contract. These charges shall be deducted from Department monies due the Contractor. Roadway Grading 206.05 - 146 - 3. Clearing and grubbing of borrow and waste sites shown in the contract shall be measured and paid for in accordance with Subsections
202.03 and 202.04. When borrow is obtained from sites which are not shown
in the contract, no payment will be made for clearing and grubbing.
4.Water applied shall be subsidiary to "Roadway Grading."
5.Payment is full compensation for all work described in this Section. - 147 - SECTION 207 -- SALVAGING AND PLACING TOPSOIL
207.01 Description
1.The Contractor shall remove t opsoil from cut areas and areas to be covered by embankments and place the topsoil at the locations indicated in the contract or designated by the Engineer when "Salvaging and Placing Topsoil" is shown in the bid proposal "Schedule of Items".
207.02 Material Requirements
1.The topsoil material shall be loam, sandy loam, silty clay loam, or clay loam humus-bearing soils.
2.The Engineer must approve all topsoils.
207.03 Construction Methods
1.The Contractor shall clear a nd grub the topsoil areas before the topsoil is removed.
2.Soils below the designated tops oil layer shall not be incorporated into the salvaged topsoil.
3.The Contractor shall remove t opsoil from cut areas and areas to be covered by embankments.
4.Topsoil shall be stockpiled at locations designated by the Engineer within the right-of-way which will not impair drainage.
5.Placement:
a.Topsoil shall be placed at the locations indicated in the contract or designated by the Engineer.
b.Areas to be covered with topsoil shall be undercut or underfilled so that, when covered to the required depth wi th topsoil, the finished work shall conform to the lines, grades, slopes, and typical cross sections shown in the contract.
c.Areas to be covered shall be loosened by tilling, harrowing, or discing to a depth of at least 2 inches (50 mm).
d.Harrowing, discing, or both may be required to assist in breaking down clods or lumps to provid e a uniform texture to the topsoil.
e.Heavier clay bearing loam topsoils used on sandy areas shall be harrowed or disced to mix the two soils.
6.Rocks, twigs, large clods wh ich will not break down, and other foreign material shall be removed. The entire surface shall be dressed to present a uniform appearance.
7.Compaction: a. Rolling of the topsoil will not be required except for that which is placed on the shoulders.
b.Topsoil placed on the shoulders shall be compacted with at least two complete coverages over the area with a multiple wheel, pneumatic-tired roller meeting the requirements of Subsection 205.03, Paragraph 14.c.(2).
8.It shall be the Contractor's responsibility to determine the volume of topsoil required to complete the work.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 179–180 of 1,048.