Specifications Vol. II - Laserfiche WebLink

Home Browse Search

,.., . " . SUBARTICLE 104-6.4.9 (Page 127). The text IS deleted and the following su bstituted: '"'1 . r'1 . Provide bales having minimum dimensions of 14 by 18 by 36 inches [350 by 450 by 900 mm] at the time of placement. Construct Baled Hay or Straw dams according to details shown in the plans, as directed by the Project Engineer or as shown in the Design Standards to protect against downstream accumulations of sediment. Use natural baled hay or straw meeting the requirements of Section 981-3 or synthetic hay bales may be used as an alternative to natural baled hay or straw. Synthetic hay bales should be interlocking, have pre-made stake holes, are made of synthetic fibers (polypropylene, nylon, polyester) that meet the Environmental Protection Agency's TCLP standards, and produced into a filter medium with needle-punched fibers. Use synthetic hay bales listed on the QPL. Wash out and remove sediment deposits when the deposits reach 1/2 the height of the reusable synthetic hay bale or as directed by the Engineer. Dispose of the washout in accordance with Section 104-3 or in an area approved by the Engineer. Synthetic hay bales that have had sediment deposits removed may be reinstalled on the project as approved by the Engineer. ,.., . '1 . .., . ., . ARTICLE 104-6 (Pages 125-128) is expanded by the addition of the following new Subarticle: I n 104-6.4.13 Artificial Coverings: General: Install artificial coverings in locations where temporary protection from erosion is needed. Two situations occur that require artificial coverings. The two situations have differing material requirements, which are described below. (1) Use artificial coverings composed of natural or synthetic fiber mats, plastic sheeting, or netting as protection against erosion, when directed by the Engineer, during temporary pauses in construction caused by inclement weather or other circumstances. Remove the material when construction resumes. (2) Use artificial coverings as erosion control blankets, at locations shown in the plans, to facilitate plant growth while permanent grassing is being established. For the purpose described, use non-toxic, biodegradable, natural or synthetic woven fiber mats. Install in accordance with 571-3 as for plastic erosion mat. Install erosion control blankets capable of sustaining a maximum design velocity of 6.5 ft/sec [2 m/sec] as determined from tests performed by Utah State University, Texas Transportation Institute or an independent testing laboratory approved by the Department. Furnish to the Engineer, two certified copies of manufacturers test reports showing that the erosion control blankets meet the requirements of this Specification. Certification must be attested, by a person having legal authority to bind the manufacturing company. Also, furnish two 4 by 8 inch [100 by 200 mm] samples for product identification. The manufacturers test records shall be made available to the Department upon request. Leave the material in place, as installed, to biodegrade. r'l . ~ . . 1'"1 . I I 1""'1 . SUBARTICLE 104-7.1 (page 128) is deleted and the following substituted: ,., 104-7.1 General: Provide routine maintenance of permanent and temporary erosion control features, at no expense to the Department, until the project is complete and accepted. If reconstruction of such erosion control features is necessary due to the . ,.., . n 09/09 01000-20 03-4122.F .