Ord 2002-046 - Laserfiche WebLink

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developed areas shall be located to avoid sinkholes, faults and fractures to the greatest extent practicable. (,26) Construction of enclosed storm sewers and impervious channel linings shall be permitted only when the director of eity engineeri.!!g, on the basis of competent engineering evidence, concludes that storm sewers or impervious linings are justifiable options. (~+) Necessary stormwater drainage systems and/or culverts shall be designed to mitigate the impact of erosion and stormwater runoff on water quality through the use of approved control strategies to control sediment and dissipate energy and through the use of multiple smaller outlets whenever practical and by locating discharges to maximize overland flow. (7) Pond bottoms must be vegetated. (8) Internal rock berm baffles are required in ponds. (9) Where a separate water quality pond is required under this article or other applicable regulations, the discharge from the pond must be under a baffle that will trap floating matter in the pond. (10) Suitable access must be provided for maintenance of ponds and sediment traps. (e) Erosion prevention techniques, as referenced in the City of Austin Drainage Criteria Manual and the City of Austin Environmental Criteria Manual Erosion and Sediment Control Guidelines for Developing Areas in Texas, will be utilized to attain ebtaffi drainage objectives for channelization and overland flow. (f) The report and plan for erosion control and restoration measures shall comply with the City of Austin Drainage Criteria Manual and the City of Austin Environmental Criteria Manual. soil conservation service manual titled "Erosion and Sediment Control Guidelines for Developing f~reas in Texas." (g) The director of eity engineering may require modification of modify the approved erosion control and construction sequencing plans upon written notice 48 hours in advance to the holder of a site development permit when new information reveals a latent condition or evidence that there was a serious deficiency in the approved plan which makes the controls and sequencing approved inadequate because of the new information. The holder of the site development permit shall have the right to appeal the decision to require modification of modify the approved erosion control and construction sequencing plans to the director of eity engineeri.!!g; provided, however, that all work being done pursuant to the site development permit that is related to the required modification shall cease for the duration of the appeal. If dissatisfied with the decision of the director of eity engineering, the holder may appeal the decision to the city manager; further appeals shall be made to the city council; provided, C:\TEMP\Drainage Interim Amendments.doc 6