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HomeMy WebLinkAboutCity of Tamarac Ordinance O-1978-021Introduced by Temp .�� 530 (�bn CITY OF TAMARAC, FLORIDA ORDINANCE NO. — 7 — Z AN ORDINANCE AMENDING CHAPTER 24 of the TAMARAC CITY CODE, AS AMENDED BY ORDI- NANCE 76-40, ARTICLE IT, PAVEMENT, SEC- TION 24-17; DECLARING AN EMERGENCY; PRO- VIDING A SAVINGS CLAUSE.; REPEALING ALL LAWS IN CONFLICT AND PROVIDING AN EFFECTIVE .... .... DATE,.. WHEREAS, the City Council has received a recommendation from the City Engineer for the amendment of Chapter 24, of the Tamarac City Code, as amended by Ordinance 76-40, Article IT, Pavement, Section 24-17; and WHEREAS, the City Engineer has requested that City Coun- cil enact the amendment as an emergency; and WHEREAS, City Council has determined that the enactment of an amendment as an emergency is appropriate, in order to pro- vide for a coefficient of runoff more in line with the existing conditions in the City's impervious areas, which will in turn promote the health, safety and general welfare of the public, .in view of the established need of the City to require storm drainage systems to be designed to reflect higher intensity storm runoffs. NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF TAMARAC, FLORIDA: SECTION 1: That Section 24.17 of Chapter 24 of the Tamarac City Code as amended by Ordinance No. 76-40, is hereby amended to read as follows: Section 24-17. DESIGN OF STORM DRAINAGE SYSTEM. The storm drainage system required for land develop- ment shall be designed in accordance with the engineering principles accepted by the Florida State Department of Transportation and in conformance- wit.b t-he fl�owirrg — - design criteria: (a) Rational formula (R = c i A) shall be used. (b) Coefficient of runoff shall be 0.95for impervious areas and from 0.5 to 0.9 for grassed areas. (c) Storm drainage shall be designed by outlet control methods to the effect that a ten year design storm will produce a headwater no higher than the lowest catch basin rim and a twenty-five year storm will produce a headwater no higher than 1-inch below the centerline crown of the roadway or the inside edge of the roadway on roadways with medians. The mini- mum gutter and pavement gradient shall be .003-feet per foot. (d) Manning's "n" shall be 0.013 for reinforced concrete or fully paved or lined corrugated metal pipe; 0.019 for unpaved, helically corrugated aluminum pipe and 0.024 for unpaved, unlined, annularly corrugated pipe. (e) Design water level of the secondary canals into which the outfall pipes flow shall be +7.00 feet MSL for systems in the C-14 drainage basin and +6.00 feet MSL for those systems discharging into the C-13 basin. The developer's engineer shall submit a copy of his design calculations to the City Engineer for his approval. The City Engineer may permit other design criteria to be used or may require the developer's designer to use criteria other than those given in this section, but not less than those established in this section,which the City Council may deem necessary for the health, safety and welfare of the public. Inlets, catch basins, manholes, headwalls and other drainage structures shall be of a design approved by the City Engineer. SECTION 2: The City Council does hereby declare that the enactment of this Ordinance as an emergency measure is necessary and vital to promote the health, safety and general welfare of the public, by providing for a coefficient of runoff to accommodate high intensity storm drainage demands. - 2 - 1 1 SECTION 3: Should any section or provision of this Ordi- nance or any portion hereof or any paragraph, sentence or word be declared by a Court of competent jurisdiction to be invalid, such decision shall not affect the validity of the remainder hereof as a whole or any part hereof other than the part declared to be invalid. SECTION 4: All ordinances or parts of ordinances in con- flict herewith are repealed to the extent of such conflict. SECTION 5: This ordinance shall become effective immediate- ly upon its passage at First and Second Reading. PASSED FIRST READING THIS DAY OF 1978 PASSED SECOND READING THIS DAY OF J 1978 ATTEST: I HEREBY CERTIFY that I have ap- proved the form and correctness of this Ordinance. ou Alan F: C%4 torney I,.. .. / #. 0,5 evht rteg6� RECORD OF COUNCIL VOTE MAYOR W. P VIM H. MASS CIM I. M. DIS CAM M. KLIKA W!