Laserfiche WebLink
Specificstions Contd. -_- - - :: _. _ <br />~~ c) Placing and Compacting -The drainage filter shall be <br />• ~ placed at the downstream toe in continuous, approximately <br />horizontal layers not more than 12 inches in compacted <br />thickness. When each layer of material has been conditioned <br />to have the required moisture, it shall be compacted by <br />no less than six passes of the treads of a A0,000 pound <br />.crawler tractor. <br />S.~ Imperivous Zone - . <br />a) Material -The material 4vi11 be clay-silt with little sand <br />and medium plasticity. The material is located at the desig- <br />nated borrow area. <br />~. <br />b) Moisture and Compaction -The distribution of materials shall <br />be such that the compacted material will be homogeneous <br />and free from lenses, pockets, streaks, or other imperfec-. <br />lions. The material shall be deposited in horizontal layers <br />not more than six inches thick after being compacted. The <br />excavating and placing operations shall be such that the <br />' material when compacted will be. blended sufficiently to secure <br />~ the best practicable degree of compaction, impermeability, <br />•~ and stability. Compaction and moisture content will meet <br />the follocving: <br />1) .Compaction to at least 95°5 of standard proc*.or density, <br />with an average density of 98'5, <br />11) Moisture content shall range between 1% below and 3% <br />above optimum moisture content, <br />6. Pervious Zone - <br />a) Material -The materials to be used for the pervious zone <br />shall be selected pervious mistures of sand, gravel, and cobbles, <br />reasonably well graded to 3 inches maximum size. Fragments <br />larger than 3 inches may be used if well distributed in the <br />zone. The pervious zone shall not ccntain more than 545, <br />by weight, of material passing a United States Standard No. 200 <br />sieve, The pervious material will be obtained from the ' <br />designated borrow area. Soil testing done by Geotek Inc. <br />(See attached report) and by Utah International, Inc, at the <br />pervious borrow area shows a sufficient supply of graded <br />gravel with less than 245 passing a n200 sieve. <br />~~ <br />' ;~ <br />' ~ 12 - <br />REVISED <br /> <br />FEB 1 z_az <br />