02-18-10 Special Called Meeting and Public Hearings of the La Porte Planning and Zoning Commission

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Planning & Zoning Commission Lot Coverage Rule Zoning Ordinance Amendment Page 2 of3 The summary of the staff's research is as follows: City Min. Lot Area Min. Yard Setbacks Max. Lot Covera2e La Porte 6,000 s.f. 25'-15'-5' 40% Pearland 6,000 s.f. 25' -20' -7'6" 60% Webster 6,000 s.f. 20'-15'-5' 52% Friendswood 6,200 s.f. 25'- 20'- 5' 50% League City 5,600 s.f. 20'- 15'- 5' N/A Pasadena 6,000 s.f. 20'-5'-5' N/A Deer Park 6,900 s.f. 25'-20'-5' N/A Baytown 5,400 s.f. 15'-10'-5' N/A In addition, the developer of Lakes at Fairmont Greens, Section 1, has submitted research results on lot coverage ratio, which is attached herewith. The basic objective of this lot coverage is to minimize the threat of flooding to the areas and to minimize the effect of continued development in the watershed. Detention is now required for developments in certain watersheds. The subdivisions in question have their own detention basins and all lots contribute to a detention facility outfalling to nearby Harris County Flood Control District drainage channels. The City's Public Improvement Criteria Manual (PICM) uses a 55% coverage factor for drainage. The criteria, however, take into account the roofed structures and all impervious cover created by driveways, carports, sidewalks and slabs. Applying this criteria to these cases will resolve the issue in that all properties remained in compliance with the coverage requirements. City supports the use of storm water detention to supplement the open channel system. In new developments, the developers have provided all the necessary easements and rights- of-way required for drainage structures including storm sewer and open or lined channels. With on-site detention system in place, new developments will limit or restrict the impact downstream to accomplish the goal of eliminating flooding conditions for existing level of urban development or future growth in the area. 2