- 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.
207.03 Salvaging and Placing Topsoil
- 148 - 9. Topsoil material excavated in excess of the quantity required to complete the work shall be disposed of in a manner satisfactory to the Engineer.
207.04 Method of Measurement
1."Salvaging and Placing Topsoil" is measured by the square yard (square meter) of surface area where the topsoil is placed as a surface treatment.
207.05 Basis of Payment
1.Pay Item Pay Unit Salvaging and Placing Topsoil Square Yard (SY) [Square Meter (m2)]
2.The quantity of roadway excavation to be measured for payment will not include excavation made below embankment areas to obtain topsoil or excavation made in undercutting slopes, ditches, and shoulders in preparing such areas for the placement of topsoil. This excavation is subsidiary to "Salvaging and Placing Topsoil".
3.Topsoil quantities shall not be deducted from the excavation quantities.
4.Payment is full compensation for all work described in this Section. - 149 - SECTION 208 -- BORROW AND WASTE SITE RESTORATION
208.01 Description
1.This work consists of the rest oration of Department provided sites from which borrow is obtained or where waste soil materials are disposed.
208.02 Construction Methods
1.The Contractor shall begin t he restoration work, including the seeding, as soon as all borrow material has been removed or all wasted soils are disposed and finish graded.
2.The Contractor shall scarify t he entire area, including slopes, to a minimum depth of 6 inches (150 mm).
3.The Contractor shall remove the available topsoil at State-furnished borrow sites and waste sites to a minimum depth of 6 inches and stockpile this material in approved areas. The Contractor shall uniformly spread topsoil that was stockpiled at the st art of excavation over the area. The entire area, including the stockpile areas, shall be seeded in accordance with Section 811 using the kinds and rate s specified in the special provisions for borrow/waste site restoration.
4.The Contractor shall adjust se eding time as outlined in Section 811 to fit conditions prevailing on the project.
5.The Contractor shall leave borrow and waste sites in a neat and presentable condition, in accordance wi th any land contract requirements, and acceptable to the Department upon completion of the work.
208.03 Method of Measurement
1."Restore Borrow Site" and "Restore Waste Site" will be surface measured, and the unit of payment will be the acre (hectare) of site area actually used. The area of borrow sites and waste sites restored shall be the quantity shown in the contract unless changes are authorized.
2.All temporary stockpile areas sha ll be considered subsidiary to the work of "Restore Borrow Site " or "Restore Waste Site".
208.04 Basis of Payment
1.Pay Item Pay Unit Restore Borrow Site Acre (A) [Hectare (ha)] Restore Waste Site Acre (A) [Hectare (ha)]
2.Payment is full compensation for all work described in this Section.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 181–182 of 1,048.