Agenda - 11-06-1978 - Laserfiche WebLink

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12X PROPOSED nODIF CATIONS AND AIMENNDHENTS TO THE ORA.N'GE (IMI'-l"TY $0.1L FIRMSMN AND COYEROL ORDIZ42LiCS oSeetiaa 3 add: . i ee. EnerAv Dissipatoi - means a structure or a shaped channel section __�ri th�1 r echanical armoring placed at the outlet Of Pipes or conduits to receive and break dorm the energy from high velocity floe. ff. Stor! Drainage Facilities_ - means the system of inlets, conduits, chati.jels, ditches, and appurtanances which serve to collect-and convey stormwater through and from a given� drainage area. gg. Ten, Rear Storm - means the surface runoff resulting from a rainfall of I, intensity expected to be equalled or exceeded, on the average onc!I in 10 years, and of a duration which will produce the maximum peak rate of runoff, for the watershed of interest under 2 Age antecedent wetness conditions. h1h =eans the average velocity of floe through the cross section of he main channel at the peak flow of the Storm of iate est. The cross section of the main channel shall be that area defined by the geometry of the channel plus the area of the flow below the flood height defined by vertical lines at the main chart el banks. Overload flows are not to be included for the puip dsa of computing velocity of floe. Section 6 delete existing section and substitute: Recuir- a Plan I - --ment an erosion and sedimenvcontrol,on control plat shall l -7---7- be plepared and =fled with the Erosion Control Division =" ; prior to the Tom aenW-ment of any land disturbing adtivity whenever tha propped activity will result in the uncovering of more than 40,0@0 contiguous square feet. b. ion - the person responsible for the land distirbing actly y must obtain an Erosion Control Plan Exemption Form fro- the Erosion Control Division, prior to the commencement of any land ipturbing aqUvAy whenever the proposed activity will result in t I uncovering of more than 20,000 contiguous square feet. c. Protection of fropeTty - persons engaged in land disturbing acti- vitl6s shall take all reasonable measures to protect all public and �rivaw property from damage by such activities. This require- sent shall apply to any area to be disturbed, regardless of the size of the area to be uncovered. Section 7f. elete existing sub-section and insert: f. Mana 6 Storm Vater Runoff - then the increase in the peak rates and yelocity of storm water runoff resulting from a 'land-disturbing acti it Y is sufficient to cause accelerated erosion of the receiv- ing teicourse, plans are to include measures to control the velocit • and rate of release at the point of discharge so as to niniu ize accelerated erosion of the site and increased sedimentation of die stream. Section 9 J1. - W omit the word certain dele e sit --sections a. & b. and substitute: