659.02 Materials.
mm} apart along the axle or shaft. Crimpers shall be specially designed so that by adding weight {mass} or using hydraulic force from the tractor the mulch will be imbedded a minimum of 2 inches {50 mm} into the ground. The diameter of the disks shall be large enough to prevent the axle or shaft from dragging or in any way disturbing the mulch or soil. Under no circumstances shall a disc harrow be used to per form the crimping operation. Hydraulic mulch application shall be performed using equipment designed for this purpose and that is in compliance with the recommendations of the mulch product manufacturer.
656.04 Method of Measurement.
Mulch will be measured by the acre {hectare} of the finished surface dimensions of the area ordered treated.
656.05 Basis of Payment.
a.Unit Price Coverage . Mulch will be paid for at the contract unit price which shall be payment in full for materials, including tackifiers or mulch control netting (if used), equipment, tools and labor necessary to furnish, place and maintain the mulch. Payment for this work will be made upon satisfactory application of the mulching.
b.Payment will be made under Item No .: 656-A Mulching - per acre {hectare} ROLLED AND HYDRAULIC EROSION CONTROL PRODUCTS
659.01 Description.
This Section shall cover the work of furnishing, installing, and maintaining Rolled Erosion Control Products (RECPs) and Hydraulic Erosion Control Products (HECPs). RECPs and HECPs will be referred to as “erosion control products” in this section. Areas to be covered by erosion control produc ts (ECPs) will be shown on the plans or will be designated by the Engineer.
659.02 Materials.
a.Acceptable Erosion Control Products . Erosion control products shall be furnished in compliance with the requirements given in Article
860.11 A list of accept able erosion control products (LIST II -11 "ROLLED AND HYDRAULIC EROSION
CONTROL PRODUCTS") is given in the ALDOT manual titled "Materials, Sources, and Devices with Special Acceptance Requirements". Information concerning the list and manual is given in Su barticle 106.01(f) and ALDOT -355 "General Information Concerning Materials, Sources, and Devices with Special Acceptance Requirements".
b.Utilization of Erosion Control Products . Erosion control products shall utilized as the final stabilization layer in conjunction with the required permanent vegetation.
1.Degradable Erosion Control Products . Degradable ECP's shall be furnished to effectively control erosion and enhance the establishment of vegetation during a defined minimum period of time called "func tional longevity". The Contractor shall be responsible for selecting approved ECPs with a functional longevity of sufficient duration to allow establishment of permanent vegetation prior to product degradation or as shown on the plans or as designated by t he Engineer.
2.Permanent Erosion Control Products . Permanent ECPs shall be furnished to effectively control erosion, enhance the establishment of vegetation, and permanently reinforce vegetation for applications where permanent vegetation alone will not p rovide sufficient protection against anticipated erosive forces.
659.03 Construction Requirements.
c.Selection of Erosion Control Products . ECPs will be specified based on the characteristics of the intended application site. The maximum slope or the maximum anticipated channel shear str ess from the flow of water is given in the following table for each type of erosion control product. EROSION CONTROL PRODUCTS Product Application ECP Type Maximum Slope (H:V) Maximum Anticipated Channel Shear Stress1 (Pounds per Square Foot) Slope S4 4:1 - S3 3:1 - S2 2:1 - S1 1:1 - Channel C2 - 2.0 C4 - 4.0 C6 - 6.0 C8 - 8.0 C10 - 10.0 NOTE 1 (in the table of ECPs) : The approximate shear stress that an ECP would be exposed to in a channel may be calculated from the formula: Approximate Shear Stress = g X D X S b g = Unit weight of water: 62.4 pounds per cubic foot; D = maximum expected depth of water in the channel (feet); Sb = slope of bed in (feet per foot).
659.03 Construction Requirements.
a.Required Type of ECP. The Contractor shall furnish the Type of ECP shown on the plans or designated by the Engineer. Unless shown otherwise on the plans, RECPs and HECPs may be used interchangeably if equivalent RECPs and HECPs are approved for use. The required Type of ECP shall not be changed without the written approval of the Engineer. Areas requiring rapidly degrading or no -net products will be shown on the plans. If the required Type of ECP is not available to be selected from List II -11, the Contractor shall furnish a more subst antial ECP from List II -11 without additional compensation. (For example, if a Type S3 ECP is shown to be required on the plans, and there are no Type S3 products shown in List II -11, Type S2 or Type S1 will be an acceptable substitute. Similarly, if a Type C4 ECP is shown to be required on the plans, and there are no Type C4 products shown in List II -11, Types C6, C8 or C10 will be an acceptable substitute.)
b.Preliminary Preparation. Prior to placement of the ECP, the area shall have been prepared in a ccordance with the required ground preparation, fertilizing, seeding or other required treatment. It is important that the soil surface is smooth to ensure maximum surface area contact with the ECP.
c.Installation of ECP. The Contractor shall submit the ECP manufacturer's installation requirements, including staple patterns for rolled ECPs, to the Engineer before beginning the installation. The ECP shall be installed in accordance with the manufacturer's requirements unless directed otherwise by the Engin eer. Rolled ECP typical installation shall be parallel to the direction of flow. There shall be an anchor trench at the top of the installation. Upstream RECPs shall overlap any downstream RECPs. Adjacent RECPS shall also be overlapped. Staples shall be pl aced on overlaps, at the toe of the RECP, and throughout the RECP installation to ensure the RECP is in contact with the underlying soil. Rolled ECPs that are soil -filled permanent turf reinforcement mats will require either a temporary rolled erosion cont rol product or sod installed on the soil surface to prevent erosion until permanent vegetation is established. Hydraulic ECP typical installation shall be in opposing directions to provide a solid blanket of product. HECPs shall be applied by equipment tha t meets the recommendations of the product
660.03 Construction Requirements.
manufacturer. HECPs shall be applied at the rate designated by the manufacturer specific to the slope. The application rate will be verified by measuring the air dry weight {mass} per pound {kilogram} and dividing by the surface dimensions of the area covered. HECPs should not be installed in areas subject to channelized flow or areas having a potential to flood during a local 2 year, 24 hour storm event.
d.Protection of ECP. The ECPs shall be protected during al l construction operations. Payment will not be made for the repair or replacement of the ECPs damaged by the Contractor, or for the repair or replacement of ECPs that fail because of improper installation.
659.04 Method of Measurement.
Erosion control prod ucts (ECPs) will be measured by the square yard {square meter} of the finished surface dimensions of the area covered. Separate measurement will not be made for folds, laps, check slots, anchor slots, etc.
659.05 Basis of Payment.
a.Unit Price Coverage . ECPs will be paid for at the contract unit price, which shall be full compensation for the furnishing and installation of the product including all materials, equipment, tools, labor and incidentals required to complete this item of work.
b.Payment will be made under Item No .: 659-C Erosion Control Product, Type * - per square yard {square meter} * Type of ECP: S4, S3, S2, S1, C2, C4, C6, C8, C10 SECTION 660 VINES, SHRUBS AND TREE PLANTING
660.01 Description.
This Section shall cover the work of furnishing, planting, and establishing healthy, live, growing trees, shrubs, seedlings, vines or other designated plants at designated locations on the project. The specie, size, etc. of vines, shrubs, seedlings and trees will be as indicated on the plans or proposal. Basic work consists of furnishing or harvesting of plants and transporting thereof; preparation of plant site or beds including furnishing a nd preparation of soil, fertilizer, mulch and other miscellaneous items incidental to the planting procedure; the planting of the plants in a workmanlike manner in accordance with accepted horticultural practices along with the water necessary to establish and maintain the plants in a live, growing condition throughout the life of the project. The amount of water to be used and when it shall be applied shall be the Contractor's responsibility until acceptance of the project.
660.02 Materials.
All materials shall conform to the requirements of Division 800, Materials. Specific reference is made to Roadside Improvement Materials, Section 860.
660.03 Construction Requirements.
a.General . All planting operations for vines, shrubs and trees shall be done under the on -site, direct supervision of a person possessing a current and valid professional services permit for the Setting of Landscape Plants and a Nursery Dealer Certificate issued by the Alabama Department of Agriculture and Industries. Proof of the posses sion of these permits shall be furnished to the Engineer prior to the commencement of work. Any work performed without the on -site, direct supervision of these permitted individuals will be subject to rejection by the Engineer. The normal growing period fo r vines, shrubs, and trees is defined as that time period between April 1 and September 30. All vines, shrubs and trees shall be planted so as to provide the maximum growing time allowable under the contract time. All plantings shall be scheduled to provide a minimum of one growing season except as noted in Subarticle 860.06(b).
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 554–555 of 934.