- 705 - SECTION 824 -- CONCRETE WASHOUT
824.01 Description
1.This work consists of installing concrete washout facilities located on the right of way. Concrete Washout s shall contain concrete waste from cleaning concrete equipment. The wash out facilities shall prevent runoff and leaching of liquids.
824.02 Material Requirements
1.Contractor shall use plastic lining material with at least 10-mil thickness and shall be free of holes, tears or other defects that compromise the impermeability of the material.
2.Prefabricated concrete washout devices must be approved by the Engineer.
824.03 Construction Methods
1.Concrete Washout
a.Concrete washout facilities shall be constructed of sufficient size to contain all liquid and concrete waste generated by washout operations.
b.The contractor shall line the pit with plastic sheeting that has no holes or tears to prevent leaching of liquids into the ground.
c.The soil base shall be prepared to prevent tears or holes in the plastic sheeting material.
d.Concrete washout facilities shall be maintained to provide adequate holding capacity.
e.Constructed washout facilities shall be evaluated during scheduled inspections to ensure that plastic sheeting is intact and sidewalls have not been damaged by construction activities.
2.Concrete washout facilities shall be located a minimum of 50 feet from waters of the state.
3.The Contractor shall furnish, inst all, maintain and remove at no cost to the Department, a “Concrete Washout” sign adjacent to each washout facility.
a.The sign shall be placed in a manner in which it is visible to equipment operators.
4.The location of all concrete washout facilities shall be identified on the Temporary Erosion Control Plan.
5.Existing facilities must be cleaned, or new facilities shall be constructed when the washout is 75% full.
6.When concrete washout facilities are no longer required for the work, the hardened concrete shall be disposed of in accordance with all environmental regulations.
7.Upon completion of the concrete work, all concrete washout facilities shall be removed and the locations restored to the final erosion control requirements.
824.04 Concrete Washout
- 706 - 824.04 -- Method of Measurement and Basis of Payment
1.Construction, maintenance and removal will not be measured, but shall be subsidiary to the applicable items. - 707 - SECTION 825 -- FURNISHING AND PLANTING OF PLANT MATERIALS
825.01 Description
1.This work shall consist of furnishing, collecting, packaging, delivering, and planting the "plant materials."
2.Plant material shall mean trees, shrubs, vines, ground covers, and plants of all descriptions.
3.Hortus Third , compiled and published by the staff of the L. H. Bailey Hortorium, Cornell University, shal l be the Department's reference for species nomenclature.
825.02 Material Requirements
1.Planting Seasons a. A minimum of 90 days before each planting season, the Contractor shall submit to the Department:
1.A copy of confirmed nursery purchase orders. (2) A list showing each plant and where it was grown.
b.All plant material shall have been grown within the boundaries shown on the plant hardiness zone map in the special provisions.
c.Plant material from unapproved sources will be rejected. d. (1) Planting is restricted to the following:
i.Spring, Conifer ous -- March 15 to May 1. (ii) Spring, Decidu ous -- March 15 to May 15. (iii) Fall, Coniferous -- August 15 to September 30. (iv) Fall, Balled and Burlapped or container grown Deciduous -- August 15 to December 1.
2.Planting within these s easons is further restricted by weather, soil conditions, and accepted local practices.
2.All plant materials shall be grown in a State inspected nursery unless specified otherwise (i.e., collected plant materials).
3.The contract may allow or r equire the use of "Collected Plant Materials". Collected plant material is non-nursery-grown plant material, including coniferous plant material grown for Christmas trees, which has not received the normal transplanting and root pruning given nursery-grown plant material.
4.All Contractor provided plant materials shall conform to the appearance and physical properties standard described in the American Standard for Nursery Stock published by the American Association of Nurserymen, Inc.
5.a. All plants shall be labeled.
b.The information on each plant's label shall describe the plant's: (1) Botanical genus. (2) Species. (3) Common name.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 739–740 of 1,048.