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General Provisions (00100-00999)

663TREE WELLS AND TREE ROOT PROTECTION

AL · 2022 Standard SpecificationsBook pages 561562View official source ↗

661.03 Construction Requirements.

661.03 Construction Requirements.

a.General . The requirements provided f or Vines, Shrubs and Tree Planting, Section 660, and Roadside Improvement Materials, Section 860, shall apply in all respects to transplanting trees and shrubs, except where otherwise indicated by specific requirements given below. Trees, shrubs and vines to be transplanted will be identified clearly on the plans as to existing and proposed location, species, and size. Planting holes of the size shown on the plans for the particular specie of plant material shall be dug and approved prior to moving existing plants. Material to be transplanted shall be dug with the size ball for collected plants recommended in the American Standard For Nursery Stock, current edition, unless otherwise shown by plan details or directed by the Engineer.
b.Plant Topsoil Plant topsoil shall meet the requirements of Section 660.
c.Watering . The vine, shrub and tree plantings shall be given one watering during the course of the planting operations and additional watering as needed. Sufficient water shall be applied to wet thoroughly the adjacent area down through the root system. Water shall be applied in such a manner that will prevent erosion of the finished surface.
d.Care During Construction. Care during construction shall be the same as specified in Subarticle 660.03 (h).
e.Basis of Acceptance and Replacement . The basis of acceptance and replacement shall be the same as specified in Subarticle 660.03(i).

661.04 Method of Measurement.

a.Vines, Shrubs and Trees . The quantity of transplanted vines, seedlings, shrubs and/or trees to be paid for under this item will be the actual number ordered, planted and accepted. Only vines, seedlings, shrubs and trees in a living, healthy condition will be accepted.

661.05 Basis of Payment.

a.Vines, Seedlings, S hrubs, and Trees . Transplanted vines, seedlings, shrubs, and trees ordered, planted and accepted will be paid for at the contract unit price for each. Such price and payment shall be full compensation for furnishing plants, plant test or certification serv ice, planting, pruning, guying and staking, wrapping, mulching, furnishing and applying fertilizer, and for all materials, labor, equipment, tools, and incidentals necessary to complete the work.
b.Watering . No direct payment will be made for water used in the placement and care of planting during the construction. All water necessary shall be considered as a part of the unit price bid for items provided by this Section.
c.Payment will be made under Item No.: 661-A Transplanting Vines, Kind - per each 661-B Transplanting Shrubs, Kind - per each 661-C Transplanting Trees, Kind - per each TREE WELLS AND TREE ROOT PROTECTION

663.01 Description.

This Section shall cover the work of (1) protecting selected trees, shrubs or other woody plants by the use of tree wells constructed so as to protect the root system and/or (2) placing a porous tree root protection material, mulch or other approved material to such depth around the roots as may be provided by plan details or directed.

663.05 Basis of Payment.

Tree wells shall be constructed of concrete, rubble masonry, or brick masonry as may be provided on the plans. Such construction shall be performed in accordance with the design and details indicated on the plans.

663.02 Mate rials.

All materials furnished for use shall comply with the appropriate requirements of Division 800, Materials, with specific reference to the following: Tree Well Masonry Concrete, Section 501 Rubble Masonry, Section 612 Brick or Concrete Block Masonry, Section 613 Tree Root Protection Material, Section 860

663.03 Construction Requirements.

a.Excavation and Drainage . All excavation incidental to and necessary for constructing the work in the area of the trees to be protected shall be conducted so as t o avoid injuring the root system. No backfill of any nature shall be placed by the Contractor above the root spread of a tree or plant designated to be preserved until a porous material not less than 3 inches {75 mm} in depth or the depth directed has firs t been placed above the roots. Adequate drainage of tree wells, etc. shall be provided by means of weep holes, drain tile, etc., as may be indicated on the plans or directed.
b.Tree Wells . Tree wells shall be constructed in accordance with the dimension and arrangement shown on the plans or as directed. They shall be made of masonry as shown on the plans or directed, provided; however, that mortar will be omitted in any portion of the tree well extending below the level of the top of the contigu ous broken stone root protection.
c.Tree Root Protection .
1.Where tree root protection is ordered, the porous material shall be placed to a depth ranging from 3 to 12 inches {75 to 300 mm} (or to such other depths indicated on the plans) over the root s pread of the tree or trees selected, about each of which a tree well is to be constructed, or other trees within or without the fill area, not to be welled but designated for tree root protection.
2.The area for tree root protection shall be first cleaned of all vegetation and porous material shall be then spread loosely over the required area.
3.Following the spreading of the porous material for tree root protection, a minimum of from 4 to 5 inches {100 to 125 mm} of topsoil shall be spread above the por ous fill to bring the area to the finished -grade lines designated. Such topsoil shall be transported, handled and paid for under the item of Topsoil, Section 650, all as directed in writing.
4.Sufficient care shall be taken so that trees or shrubs which a re to be preserved in place are not scarred or damaged by the operations under this item. The root area to be protected shall be the area of ground surface lying within the periphery of the limb spread of the tree.

663.04 Method of Measurement.

a.Tree We lls. The volume of masonry to be paid for shall be the number of cubic yards {cubic meters} of masonry measured complete in place and accepted.
b.Tree Root Protection . The volume of tree root protection to be paid for shall be the number of cubic yards { cubic meters} of stone, gravel, slag, or other approved material placed in tree root protection, measured loose in vehicle at point of delivery, and accepted.

663.05 Basis of Payment.

a.Unit Price Coverage . The volume of masonry, determined as provided a bove, shall be paid for at the contract unit price per cubic yard {cubic meter} bid for Tree Well Masonry. The volume of porous material tree root protection, measured as provided above, shall be paid for at the contract unit price per cubic yard {cubic me ter} for Tree Root Protection Material, which price and payment shall be full compensation for excavating and cleaning the ground surface, for placing the porous fill, for procuring and delivering

665.01 Description.

all materials and for all labor, equipment, tools and incid entals necessary to complete the item. No direct payment will be made for excavation, including its backfill and disposal, incidental and necessary to tree wells and tree root protection work.

b.Payment will be made under Item No .: 663-A Tree Well Mason ry - per cubic yard {cubic meter} 663-B Tree Root Protection Material - per cubic yard {cubic meter} SECTION 665 TEMPORARY SOIL EROSION AND SEDIMENT CONTROL

665.01 Description.

This Section shall cover, but not limit, those items of temporary soil erosion and sediment control necessary for the management of construction stormwater discharge quality. The Contractor shall provide a nd maintain temporary soil erosion and sediment controls designed to protect the project site from soil erosion and adjacent property and waters from damage by sediment transport and deposition during construction. These temporary soil erosion and sediment controls shall be referred to as "Best Management Practices" (BMPs). A BMP is any procedure, process, technique, plan or device that can be utilized to enhance the control of soil erosion and sediment transport.

665.02 Materials.

a.Temporary Seeding . Seeds shall be furnished in accordance with the requirements given in Item 860.01(a)1. Seed mixes used for temporary seeding shall be in accordance with the following table: TEMPORARY SEEDING September through December Annual Ryegrass 25 pounds per acre {28 kg per hectare} Kentucky 31 Fescue 30 pounds per acre {34 kg per hectare} Reseeding Crimson Clover 10 pounds per acre {11 kg per hectare} January through April 15 Kentucky 31 Fescue 30 pounds per acre {34 kg per hectare} Reseeding Crimson Clover 30 pounds per acre {34 kg per hectare} Annual Ryegrass 15 pounds per acre {18 kg per hectare} April 16 through August Brown Top Millet 30 pounds per acre {34 kg per hectare} Kentucky 31 Fescue 30 pounds per acre {34 kg per hectare} Hulled Bermuda Grass 10 pounds per acre {11 kg per hectare}
b.Temporary Mulching . Temporary mulching materials shall conform to the requirements given in Article 860.03 for Mulching Material.
c.Temporary Pipe . Temporary pipe may be constructed of any type of material that will be suitable for the required work. The inside diameter of the pipe shall be selected by the Contractor based on expected flows and shall be a minimum of 12 inches {300 mm} or as shown on the plans. End treatments, joint sections, and tees shall also be of materials and sizes that are suitable for the required work. Anchors shall be installed when required to keep the pipe in place.
d.Polyethylene . Polyethylen e sheets may be of any size or color capable of serving the purpose intended provided it is of at least 4 mil {0.1 mm} in thickness.
e.Temporary Coarse Aggregate . Temporary coarse aggregate shall be either stone or concrete from the demolition of str uctures on the Right of Way.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 561562 of 934.