1615TEMPORARY MULCHING

TEMPORARY MULCHING -1 DESCRIPTION Furnish, place and secure mulch material to prevent excessive soil erosion during construction operations where it is impossible or impractical to perform permanent seeding and mulching. The actual conditions which occur during the construction of the project will determine the quantity of mulching. The quantity of mulching may be increased, decreased or eliminated entirely as directed by the Engineer . Such variations in quantity will not be considered as alterations in the details of construction or a change in the charac ter of work. -2 MATERIALS Refer to Division 10. Item Section Mulch for Erosion Control 1060 -5 Tacking Material 1060 -5 -3 CONSTRUCTION METHODS Place temporary mulch promptly at locations on temporarily seeded or non- seeded areas when so directed by the Engineer . Spread mulch uniformly over the area by hand or by means of appropriate mechanical spreaders or blowers to obtain a satisfactory uniform cover. A satisfactory application of temporary mulch on non- seeded areas consists of a sufficient amount to completely and uniforml y cover the ground. Apply tack within 24 hours after temporary mulch application. When temporary mulching is performed in conjunction with temporary seeding, apply mulch in accordance with Article 1660 -6. Complete mulching and tacking within 24 hours of temporary seeding work. Exercise care to prevent displacement of soil and seed or other damage to areas where temporary seeding is done. Apply tack meeting the requirements of Article 1060 -5 when using grain straw to assure that the temporary mulch is pr operly held in place. Take adequate precautions to prevent damage to traffic, structures, guardrails, traffic control devices or any other appurtenances during the application of tacking material. Provide adequate covering or change methods of application as required to prevent such damage. Repair any damage that occurs, including any necessary cleaning. Apply emulsified asphalt tackifier at a rate of 0.10 gallons per square yard (approximately 484 gallons per acre). Apply cellulose hydromulches at a ra te of 1000 pounds (dry weight) per acre. Apply other approved tackifiers at manufacturer’s recommended application rate. Take sufficient precautions to prevent mulch from entering drainage structures through displacement by wind, water or other causes and promptly remove any blockage to drainage facilities. -4 MEASUREMENT AND PAYMENT Temporary Mulching will be measured and paid in acres, measured along the surface of the ground over which temporary mulch has been placed as directed and accepted by the Engineer . Tacking material is incidental to the application of Temporary Mulching and no additional payment will be made. Payment will be made under: