650.02 Materials.
Installation of the pipe shall meet the requirements of ASTM F 714. Joining of the HDPE pipe shall be performed by thermal butt -fusion in accordance with the pipe ma nufacturer’s recommendations. The piping shall be assembled in a manner that does not obstruct adjacent roadways or public activities. The pipe installed by the directional drill method shall be to the alignment and grade shown on the project plans. The Co ntractor shall provide a record drawing showing the constructed horizontal and vertical alignment shown for intervals not exceeding 30 feet {9.0 m}. The Contractor shall perform the construction in a manner so that the drilling fluids and cuttings are cont ained and not released into waterways or their tributaries. The Contractor shall handle the HDPE and steel pipe in a manner that will not over stress the pipe at any time before, during, and after construction. A sizing pig shall be used to determine the presence of buckles, dents, out of roundness, and any other deformations. Anomalies shall not exceed 2% of the nominal pipe diameter or excessive ovality greater than 5% of the nominal pipe diameter.
649.04 Method of Measurement.
Encasement pipe will be mea sured by the linear foot {meter}.
649.05 Basis of Payment.
a.Unit Price Coverage . The encasement pipe will be paid for at the contract unit price bid for the type of installation required. The unit price bid shall be compensation in full for furnishing and installing the pipe, all excavation and backfill, vent pipes, spacers, end treatments, disposal of excess material and all labor, material, tools, equipment and incidentals necessary to complete the work.
b.Payment will be made under Item No .: 649-A ___ inch {mm} * Encasement Pipe, Type ** Installation - per linear foot {meter} * Show Type: Steel; High Density Polyethylene(HDPE);etc. ** Show Type: 1, 2 or 3
650.01 Description.
This Section shall cover the work of furnishing and placing topsoil and the placement of State furnished topsoil from stockpiles.
650.02 Materials.
a.Required Properties of Topsoil . Topsoil furnished or stockpiled by the Contractor shall meet the requirements given in ASTM D 5268 "Standard Specification for Topsoil for Landscape Purposes". The composition of the topsoil shall be as follows (from ASTM D 5268): REQUIRED PROPERTIES OF TOPSOIL Deleterious Materials (rock, gravel, slag, cinder, roots, sod) in the Total Sample 7 % maximum by weight {mass} Organic Material in Portion of Sample Passing the No. 10 {2 mm} Sieve 2 % to 20 % by weight {mass} Sand Content in Portion of Sample Passing the No. 10 {2 mm} Sieve 10 % to 90 % by weight {mass} Silt and Clay Content in Portion of Sample Passing the No. 10 {2 mm} Sieve 10 % to 90 % by weight {mass} pH 5 to 7 Topsoil will be sampled at the source and tested prior to application by the Engineer in accordance with ASTM D 5268 for compliance with these requirements.
650.03 Construction Requirements.
b.Sources of Topsoil .
1.Topsoil Furnished by Contractor . Topsoil furnished by the Contractor sh all be taken from areas outside of the Right of Way. The areas where topsoil is removed shall be developed, maintained and restored in accordance with the requirements given in Subarticle 106.01(b).
2.Topsoil Furnished by the State from Stockpiles . The C ontractor shall use topsoil from stockpiles that were created in accordance with the requirements given in Subarticle 210.03(b).
650.03 Construction Requirements.
a.Preparation for Topsoil Placement . The Contractor shall not place topsoil from any source (Contractor furnished or State furnished) until the Engineer has been given the opportunity to sample, test and evaluate the source for compliance. The grading and shaping of the area where topsoil must be placed shall be completed prior to the placement of the topsoil unless directed otherwise by the Engineer.
b.Application of Topsoil . Topsoil shall be applied to the depth shown on the plans or as directed by the Engineer. Applied topsoil shall be compacted by tracking. Tracking shall be accomplished by the operation of a tracked vehicle leaving ridges perpendicular to the direction flow of water down the slope. The topsoil shall then be prepared in accordance with the requirements given in 652.03. Ground preparation and vegetation establishment operat ions shall commence as soon as possible after the application of topsoil to reduce the potential for the erosion of the topsoil.
c.Portions of Stockpiles that remain after Removal of Topsoil . Portions of stockpiles that remain after the removal of topsoil shall be reshaped as directed by the Engineer. Any additional temporary or permanent seeding, mulching and other erosion control measures that are required will be paid for under the appropriate items of work.
650.04 Method of Measurement.
a.Topsoil, Item 650 -A. This item covers topsoil material furnished by the Contractor. Topsoil furnished by the Contractor will be measured in cubic yards {cubic meters} by loose measure in the delivery vehicle at the point of delivery.
b.Topsoil from Stockpile s, Item 650- B. This item covers topsoil made available to the Contractor in State furnished stockpiles on the Right of Way. This topsoil will be measured in cubic yards {cubic meters} by the cross section and average end areas method at the stockpile.
650.05 Basis of Payment.
a.Unit Price Coverage . Topsoil will be paid for at the contract unit price per cubic yard {cubic meter}, which shall be full payment for furnishing the topsoil, ground preparation handling, hauling, spreading, shaping, harrowing, disking, compaction, disposal of unacceptable material, and for furnishing all equipment, tools, labor and incidentals necessary to complete the work. Topsoil from Stockpiles will be paid for at the contract unit price per cubic yard {cubic meter}, which shall be full payment for ground preparation, cleaning and removing debris from the topsoil, handling, hauling, spreading, shaping, harrowing, disking, compaction, and for furnishing all equipment, tools, labor and incidentals necessary to complete the w ork.
b.Payment will be made under Item No .: 650-A Topsoil - per cubic yard {cubic meter} 650-B Topsoil from Stockpiles - per cubic yard {cubic meter}
652.03 Construction Requirement s.
SECTION 652 GROUND PREPARATION, VEGETATION ESTABLISHMENT AND MOWING
652.01 Description.
This Section shall cover ground preparation work and the work of establishing an acceptable permanent stand of vegetation of the species designated for establishment. This section also covers mowing of vegetated areas.
652.02 Materials.
Materials (seed mixes, mulch, fertilizer, etc.) shall be furnished in compliance with the requirements given in Section 860.
652.03 Construction Requirements.
a.Construction Sequence . The required sequ ence and timing of the placement of permanent seeding during excavation and embankment construction is given in Suba rticle 210.03(a). The Engineer may direct, even to the exclusion of other operations, that the Contractor promptly complete grading and grou nd preparation to allow the establishment of permanent vegetation in areas where it is necessary for the control of erosion and sediment.
b.Seed Mixes for the Establishment of Permanent Vegetation . The appropriate seed mix shall be chosen from tables in Section 860. The appropriate seed mix is based on planting zone, planting date, and type of area to be seeded. Seed mixes of a temporary nature are required in some areas of the State when permanent seed mixes are out of season. These mixes are shown in S ection 860 as requiring seeding in stubble for the establishment of the required permanent plant.
c.Inspection . The Contractor shall notify the Project Manager at least 48 hours in advance of any work related to seeding. This includes the mixing of se ed as well as the sowing of seed. The Contractor shall notify the Engineer of the proposed type of seed mix or mixes to be incorporated into the project prior to beginning seeding operations. Seeding work shall not begin prior to the measurement of the area to be seeded. All work shall be performed in the presence of the Engineer.
d.Preparation and Planting in Soft Soil .
1.Ground Preparation . After grading and topsoil placement and prior to ground preparation, the Contractor shall remove all boulders, stumps, roots, or other objects with any dimension larger than 2 inches {50 mm}. Topsoil shall meet the requirements given in Section 650. Ground preparation shall consist of cultivating the topsoil to a loose depth of at least 4 inches {100 mm} except on slopes 2:1 or steeper. The plowing, harrowing, cultivating, and all other operations shall be performed with proper equipment and in such a manner as to break up all clods. The ground shall be plow ed to the required depth and then cultivated with a rotary tiller or disk harrow, in crossing directions if necessary, until the result is a smooth, uniform, loose, and well broken soil providing a suitable bed for seed. In small or inaccessible areas the use of hand tools will be permitted. The Contractor shall add water as necessary to provide sufficient soil moisture to prepare the ground. All trash and other debris shall be removed from the cultivated topsoil. All pieces of wood, rocks and unbroken clumps of earth with any dimension larger than 2 inches {50 mm} shall be removed from the planting area.
2.Initial Soil Amendments . The initial fertilization shall be a commercial fertilizer that will provide at least 120 pounds {135 kg} of N, 120 pounds {135 kg} of P 2O5, and 120 pounds {135 kg} of K 2O per acre {hectare}, as computed from the nominal contents of fertilizer elements. Only one half of this rate shall be applied when the required seeding is Annual Ryegrass. Agricultural limestone (lime) shall be applied prior to
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 546–547 of 934.