This section discusses the proposed assessment methodology and the credit system. The assessments methodology is based on three areas:
- County-wide benefit area: includes costs associated with operations and maintenance and all water quality projects (everyone in the County pays for this)
- Planning unit benefit area: includes costs associated with the Watershed Assessments in each Planning Unit (only parcels in the particular Planning Unit pay for this)
- Special benefit area: includes costs associated with the Flooding CIPs (only people that benefit from fixing a major flooding problem pay for this).
The apportionment methodology is based on an ERU rate per parcel. The ERU rate factors in the total impervious area on the parcel and the total pervious area of the parcel. Since the amount of stormwater runoff from a property is based the impervious area and the pervious area, we decided that this methodology would be the most fair.
The ERUs are split up in three categories for each type of parcel: Single-family residential parcels, Condominiums and General Parcels.
Due to the fact that the Single-family residential parcel data from the Property Appraiser only has the building footprint data and not the total impervious area data, we decided to use the building footprint area to calculate the ERU rate. Due to the complexity of analyzing all the Single-family residential properties, we decided to split the Single-family residential parcels into four categories: small, medium, large and very large single family residential parcels.
Staff is currently working on finalizing this apportionment methodology.
The proposed credit system is as follows:
- The parcel retains all of the runoff from their site under the 100-year critical storm in accordance with the requirements of the County’s Land Development Regulations, either independently or as part of an organization such as a homeowners association. (31% credit)
- Runoff from the County’s right-of-way or facility discharges onto private property and such property would be eligible for a credit. (max credit of 31%)
- The parcel participates in a public-private partnership with the County to address the needs identified in the Stormwater Master Plan. Examples of such public-private partnerships are:
- Public/private partnerships with Home Owners Association (HOAs) on educating residents within the HOA on stormwater management (Low Impact Development techniques, yard maintenance, not dumping mowing in the stormdrains)
- Litter pick-up by the HOA in County
- Adopt a ditch programs