The Table of Contents for this section is available.
The work covered by this section consists of the seeding and mulching of selected areas in advance of the permanent seeding and mulching operations so as to minimize erosion of graded areas during construction operations. Temporary seeding shall be considered as a supplement to and not as a substitute for the requirements for the control of erosion and siltation provided in other sections of the specifications. The work shall include preparing seedbeds; furnishing, placing, and covering fertilizer and seed; furnishing and placing mulch; mowing; and other operations necessary for the seeding of the required areas; all in accordance with these specifications.
The work of temporary seeding shall be done promptly at the locations and times directed by the Engineer.
Temporary seeding shall be done under any of the following conditions as directed by the Engineer:
1. When it is impossible or impractical to bring an area to the final line, grade, and finish so that permanent seeding and mulching operations can be performed without subsequent serious disturbance by additional grading;
2. When erosion occurs or is considered to be potentially substantial on areas of graded roadbed where construction operations are temporarily suspended or where the grading of the roadbed has been completed substantially in advance of the paving construction;
3. During seasons of the year when permanent seeding and mulching is prohibited by the special provisions;
4. When an immediate cover would be desirable to minimize erosion, siltation, or pollution on any area.
The quantity of seed or fertilizer to be used and mowing to be performed will be affected by the actual conditions which occur during the construction of the project. The quantity of seed or fertilizer or mowing may be increased, decreased, or eliminated entirely at the direction of the Engineer. Such variations in quantity will not be considered as alterations in the details of construction or a change in the character of the work.
All materials shall meet the requirements of Division 10 shown below:
Fertilizer Article 1060-2
Seed Article 1060-4
Mulch for Erosion Control Article 1060-5
The analysis of fertilizer and the kinds of seed shall be as stated in the special provisions.
Areas to be seeded shall be loosened to a depth directed by the Engineer, but in no case greater than 5 inches. The required depth will depend on the soil conditions and topography of the seedbed.
The entire surface to be seeded shall have adequate furrows, ridges, terraces, trenches, or other irregularities in which seeding materials can lodge with reasonable assurance that the materials will not be easily displaced by wind, rain, or surface runoff.
1620-4 APPLYING AND COVERING FERTILIZER AND SEED.
The analysis of fertilizer, the kinds of seed, and the rates of application of fertilizer and seed shall be as stated in the special provisions.
No fertilizer or seed shall be applied when the Engineer determines that conditions are unfavorable for such operations.
The fertilizer or seed shall be distributed uniformly over the seedbed at the required rates of applications.
Fertilizer and seed shall be covered or left uncovered, as directed by the Engineer. If covering is required, it shall be to the degree acceptable to the Engineer for the prevention of displacement by wind, rain, or surface runoff.
All areas temporarily seeded shall be mulched, in accordance with Section 1615, unless otherwise indicated in the special provisions or directed by the Engineer.
The provisions of Article 16605 will be applicable to the approval of equipment; the use of liquid fertilizer; and the protection of traffic, structures, guardrails, traffic control devices, and other appurtenances.
1620-5 MOWING AND REPAIR OF TEMPORARY SEEDING.
Areas where temporary seeding has been performed shall be maintained in a satisfactory condition, including mowing at the locations and times directed by the Engineer.
The Contractor shall repair such areas of temporary seeding which have been damaged or have failed. Such repair shall include any necessary earthwork reshaping or the placing of additional earth material in the area involved, and the repeating of the work covered by this section. Such work shall be performed promptly at the locations and times directed by the Engineer.
(A) Seed:
The quantity of seed to be paid for will be the actual number of pounds of seed which have been applied in accordance with these specifications. The weight of seed will be determined by bag count of standard weight bags or by weighing the seed on certified platform scales or other certified weighing devices.
(B) Fertilizer:
The quantity of fertilizer to be paid for will be the actual number of tons of fertilizer which have been applied in accordance with these specifications.
The weight of dry fertilizer will be determined by bag count of standard weight bags, or by weighing the fertilizer in trucks on certified platform scales or other certified weighing devices.
The weight of liquid fertilizer will be the equivalent weight in tons of dry fertilizer.
(C) Mulching:
The quantity of mulching to be paid for will be measured as provided in Section 16154.
(D) Mowing:
The quantity of mowing to be paid for will be measured as provided in Subarticle 16608(B).
(A) Seed:
The quantity of seed, measured as provided in Subarticle 16206(A), will be paid for at the contract unit price per pound for "Seed for Temporary Seeding."
(B) Fertilizer:
The quantity of fertilizer, measured as provided in Subarticle 16206(B), will be paid for at the contract unit price per ton for "Fertilizer for Temporary Seeding."
(C) Mulching:
Mulching will be paid for as provided in Section 16155.
(D) Mowing:
Mowing will be paid for as provided in Subarticle 16609(B) for "Mowing."
(E) Compensation:
Where earthwork and temporary seeding has been adequately constructed, completely drained, and properly maintained, and damage occurs due to natural causes, the Contractor will be paid at the contract unit price for the excavated material required for repairs to the damaged earthwork, and the contract unit prices for "Seed for Temporary Seeding" and "Fertilizer for Temporary Seeding" for correcting the damaged temporary seeding.
The Contractor shall repair, at no cost to the Department, any damage to earthwork or temporary seeding which is due to carelessness or neglect on the part of the Contractor.
The above prices and payments will be full compensation for all work covered by this section including but not limited to furnishing all fertilizer, seed, and other materials; seedbed preparation; applying and covering fertilizer and seed; and mowing.
(F) Pay Items:
Payment will be made under:
Seed for Temporary Seeding Pound
Fertilizer for Temporary Seeding Ton