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<br />f','~f , <br />Ttt"rnl> ~ <br />--, <br /> <br /> <br />Planning Worksheet 6: <br />Site Preparation and Planting <br /> <br />-- <br /> <br />P LAN TIN G FOR C LEA N W ATE R '. <br /> <br />P 4 of 8 <br /> <br /> <br />installed through a cut in the fabric. <br /> <br />The second type is a coir fiber twine that looks more like woven net- <br />ting. It is better for steeper slopes, stream banks and more severe condi- <br />tions. It will stay in place for a longer period of time. <br /> <br />Jute, wood fiber and straw biodegrade faster. Wood fiber blankets are <br />made of curled strands of wood fiber placed between photodegrad- <br />able or biodegradable netting. These are good to use in stabilizing up- <br />land slopes that have been seeded. Wood fiber blankets are available <br />in different weights depending upon conditions and are generally less <br />expensive than coiro <br /> <br />Straw blankets are used for short-term needs. They degrade in 60 days <br />to about 10 months depending upon the type chosen. They should be <br />used in upland situations, for example over a seeded slope. <br /> <br />There are some situations where a non biodegradable erosion control <br />material is needed, such as a turf reinforcement mat. They are used in <br />more severe situations such as sites with very heavy wave action, high <br />stream Row velocities, or heavy runoff. <br /> <br />EROSION CONTROL BLANKET <br />INSTALLATION <br /> <br />Erosion control fabrics are installed with stakes. Biodegradable stakes <br />or staples should be used wherever possible. There are several types of <br />biodegradable stakes available: <br />. Hardwood stakes which are all natural but may take years to break <br />down. <br />. Corn byproduct stakes which break down within a year <br />. Corn byproduct staples which completely degrade in three months <br />but might not work as well in sandy soils. <br />