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1 strategies put forth include (1) the final report of the University Lake Watershed Study completed by Camp, Dresser & McKee (CDM) in March, 1989 and (2) the 13-point Agreement prepared by the Joint Watershed Work Group in October, 1989. Six different elements are- being considered at this time: - 1. Joint Planning Area Land Use Plan & Text 2. Joint Planning Agreement 3. Orange County Comprehensive Plan - Land Use Element • 4. Orange County Zoning Atlas 5. Orange County Zoning Ordinance 6. Orange County Subdivision Regulations Collins continued with describing the two basic options. Option #1 involves the land use control strategy which involves the 5-acre residential zoning, impervious surface limits and the establishment of stream buffers. Option #2 uses the structural controls strategy which is a combination of 2-acre residential zoning density which the watershed is currently under by way of the rural buffer designation, coupled with wetwater detention ponds. There would also be impervious surface limits and stream buffer requirements. Both of these strategies have been identified by CDM as being able to achieve the water quality goal of minimum degradation in University Lake. Option #1 is described below: Basic Strategy: Minimum lot size of 5 acres Maximum density of 1 dwelling unit/5 acres Existing Lots of Record: (October, 1989) May create up to 5 2-acre lots Remainder divided in accord with "Basic Strategy" Cluster Development: Minimum lot size of 1 acre Density cannot exceed 1 dwelling unit/5 acres Land saved by lot size reduction preserved as permanent open space • Collins illustrated the above option showing how it would be applied to a conventional subdivision, an existing lot of record and a cluster subdivision. Option #2 is described below: Basic Strategy: Minimum lot size of 2 acres On-site wetwater detention ponds designed to CDM standards must be provided to trap pollutants Existing lots of record: lots less than 2 acres in size can be developed at current size Cluster Development: Minimum lot size of 1 acre Density cannot exceed 1 dwelling unit/2 acres 'Land saved by lot size reduction preserved in permanent open space Collins illustrated Option #2 showing how it would be applied to a conventional subdivision. Collins described "Impervious Surface" as any surface which does not absorb rain, including buildings, roads, driveways, sidewalks, patios, and parking areas. Both paved (asphalt, concrete) and unpaved (gravel, crushed stone, soil) surfaces are considered to be impervious. This is a change in the County's definition to coincide with the CDM report. There are two proposals in terms of impervious surface: