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40 <br /> <br />d) The disturbed area and the duration of exposure shall be kept to a practical minimum. <br />e) Disturbed soils shall be stabilized by permanent vegetation and/or by engineered erosion <br />control and drainage measures as soon as practicable in the development process. <br />f) Temporary vegetation and/or mulching shall be used to protect exposed critical areas <br />during development. <br />g) Provisions shall be made to effectively accommodate the increased runoff caused by <br />changed soil and surface conditions during and after development. Where necessary the <br />rate of surface water runoff will be mechanically retarded. <br />h) Sediment in the runoff water shall be trapped until the disturbed area is stabilized by the <br />use of debris basins, sediment basins, silt traps, or similar measures. <br />i) Basin and perimeter controls shall be established at the commencement of work on the <br />site. <br />j) Storage piles shall be protected and stabilized within thirty (30) days. <br />k) Earth or paved interceptors and diversions shall be installed at the top of cut or fill slopes <br />where there is a potential for erosive surface runoff. <br />4) In order to prevent pollution of any watercourse and to reduce erosion of soil, sediment <br />control devices shall be installed prior to any grading, filling, or excavation. Such devices shall <br />be designed to retain sediment on the site or flowing adjacent to the site. <br />5) Within thirty (30) days after completion of grading, all surfaces disturbed by vegetation <br />removal, grading, haul roads, or other construction activity that alters natural vegetative <br />cover, are to be revegetated to control erosion, unless covered with impervious or other <br />improved surfaces authorized by approved plans. Erosion controls may include any <br />combination of approved engineering or vegetative measures using the North Dakota <br />Department of Transportation (NDDOT) Erosion and Sediment Control Handbook, as it <br />presently exists or may hereafter be amended. <br />6) Within thirty (30) days after completion of grading, all surfaces disturbed by vegetation <br />removal, grading, haul roads, or other construction activity that alters natural vegetative <br />cover, are to be revegetated to control erosion, unless covered with impervious or other <br />improved surfaces authorized by approved plans. Erosion controls may include any <br />combination of approved engineering or vegetative measures using the North Dakota <br />Department of Transportation (NDDOT) Erosion and Sediment Control Handbook, as it <br />presently exists or may hereafter be amended. <br /> <br />