DRAINAGE AND NATURAL AQUIFER GROUNDWATER RECHARGE ELEMENT

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1 Goal 7.0. To optimize integrated stormwater management in order to reduce damage and impacts from sea level rise and flooding, promotes recharge to the Surficial Aquifer System (SAS), improve and protect water quality in surface and ground waters, protect canal system functionality, and protect the functions of urban wetlands. Objective 7.1. shall implement drainage improvements to remove existing Central County (CC) deficiencies by Policy shall include CC capital improvements needs in the Capital Plan. Objective 7.2. Stormwater management facilities shall be provided to meet the County's short-term and long-term future surface water management needs. Policy shall formally document where high tide impacts are contributing to coastal flooding and limiting drainage systems and shall provide support and coordination with municipalities and drainage/water control districts in planning for adaptation and drainage system improvements. Policy shall continue to improve analysis and mapping capabilities for identifying areas of the County vulnerable to sea level rise, tidal flooding, and other impacts of climate change, and improve available information needed to make informed decisions regarding adaptation strategies, including infrastructure improvements, modifications, and management strategies. Policy shall, every 5 years, review and update the Priority Planning Area maps to reflect areas at increased risk of flooding based on updated 50 year sea level rise projections, commencing in Policy shall update wet season groundwater elevation maps to reflect impacts of 2 feet of sea level rise from 2010 to 2060 for planning and regulatory purposes. Policy and other appropriate drainage districts shall continue to implement land development regulations which require the minimum design criteria for stormwater management as identified in Table 7-A below as the level of service (LOS) standard used to assess the adequacy of service and concurrency during the development review process where jurisdictionally appropriate. Adopted 01/13/15 Page 7-1 Ordinance Number

2 TABLE 7-A STORMWATER MANAGEMENT LEVEL OF SERVICE (LOS) STANDARDS Road Protection Residential streets not greater than fifty feet wide rights-of-way to have crown elevations no lower than the elevation for the respective area depicted on the ten year "Flood Criteria Map." Rights-of-way greater than fifty feet wide to have an ultimate edge of pavement no lower than the elevation for the respective area depicted on the ten year "Flood Criteria Map." Buildings Off Site Discharge Storm Sewers Flood Plain Routing Antecedent Water On Site Storage Lowest floor elevation no lower than the elevation for the respective area depicted on the "100-Year Flood Elevation Map," or the FEMA Base Flood Elevation, whichever is higher. Not to exceed the inflow limit of SFWMD primary receiving canal or the local conveyance system, whichever is less. Design frequency minimum to be three-year rainfall intensity of the State Department of Transportation Zone 10 rainfall curves. Calculated flood elevations based on the ten-year and one-hundred year return frequency rainfall of three day duration shall not exceed the corresponding elevations of the ten year "Flood Criteria Map" and the "100-Year Flood Elevation Map." The higher elevation of either the control level elevation or the elevation depicted on the map "Average Wet Season Water Levels." Minimum capacity above antecedent water level and below flood plain routing elevations to be design rainfall volume minus off site discharge occurring during design rainfall. The above listed LOS standards shall be used to determine adequacy at the time of plat approval for all properties that are required to plat and for those properties where jurisdictionally appropriate that are not required to plat, at the time of site plan approval. Policy The Planning and Redevelopment Division shall continue to utilize the development review process of the Land Development Code to ensure the completion of the drainage system for the Unincorporated Area as development proceeds. Policy shall continue to utilize its regulatory authority under Chapter 27, Code of Ordinances to ensure that the construction and operation of stormwater management systems comply with all applicable provisions within Chapter 27, Article V, Water Resource Management, which includes a definition of water quality standards. Adopted 01/13/15 Page 7-2 Ordinance Number

3 Policy shall continue to comply with the National Pollution Discharge Elimination System - Municipal Separate Storm Sewer System (NPDES-MS4) Permits issued by the Florida Department of Environmental Protection (FDEP) and, as the lead co-permittee. Policy will continue to implement the NPDES-MS4 Permit conditions including monitoring of outfalls and continued improvement of stormwater management practices. Policy The impact of the construction and operation of stormwater management facilities and support services on adjacent natural resources shall be considered during the siting of new and expansion or capacity increase of existing stormwater management facilities. Policy shall provide for the periodic update of dependent drainage district reclamation plans, where appropriate, in order to assure that stormwater management facilities are available to meet future needs. Policy shall continue to oversee the issuance of environmental resource and surface water management permits. Policy shall implement the County-wide Integrated Water Resources Plan to optimize flood protection, water quality treatment and protection, stormwater storage, wetlands sustainability, and groundwater recharge functions in support of climate resilience and the long-term water resource needs of the Broward community. Policy shall seek to improve drainage and stormwater management through the integration of water resources and infrastructure as part of the Countywide Integrated Water Resources Plan (IWRP), with emphasis on integration of the secondary canal systems and aquifer recharge. Efforts might include identification of recommended projects, quantification of hydrologic benefits, and cost share funding of project feasibility analysis and preliminary design. Policy shall encourage nonstructural solutions to water resource problems and give priority consideration to green infrastructure alternatives whenever structural works are proposed. Policy shall participate in and implement the Community Rating System (CRS) as per Federal Emergency Management Administration (FEMA) requirements. Adopted 01/13/15 Page 7-3 Ordinance Number

4 Objective 7.3., in conjunction with its municipalities and partner agencies, shall strive to adapt the built environment to the impacts of climate change through planning and development practices that reduce impervious area run-off and improve upon the capture, treatment and use of rainwater for aquifer recharge, and as an alternative water supply. Policy shall continue to support the maximized use of stormwater management system facilities so as to encourage compact urban growth patterns. Policy The Environmental Licensing and Building Permitting Division shall continue to require new developments to provide adequate areas and easements for provision of a stormwater management system in accordance with applicable County drainage standards and criteria. Objective 7.4. Stormwater management facilities shall be designed, constructed and operated in a manner that conserves and enhances potable water resources. Policy shall work with the South Florida Water Management District (SFWMD) and the independent drainage districts to implement applicable portions of the 2013 Lower East Coast Water Supply Plan Update intended to reduce losses of excess stormwater to tide, recharge the Surficial Aquifer System (SAS) and provide additional storage of surface waters in the context of sea level rise, in order to improve the ability of these systems to adapt to climate change. Policy shall address stormwater management issues on a watershed (basin) basis as a means of providing cost effective water quality and water quantity solutions to specific watershed problems supported by continued investments in the development and application of regional hydrologic models to help predict and track the impacts of sea level rise and climate disruptions on groundwater levels, saltwater intrusion, and drainage infrastructure. Policy shall coordinate regionally to advance the Water Management Master Plan and Reuse Master Plan to optimize flood protection, water quality treatment and protection, stormwater storage, wetland sustainability, ground water recharge, and increase use of reclaimed water in support of water resource protections and development of integrated climate resilience. Policy will work with independent drainage districts, municipalities, and the SFWMD to investigate implementation of the proposed County-wide Water Management Master Plan. Adopted 01/13/15 Page 7-4 Ordinance Number

5 Policy shall provide information on alternative water sources of appropriate quality available for non-potable water needs to water managers in the County Utility and Municipal service areas. Policy shall manage the construction and operation of its facilities which dam, divert, or otherwise alter the flow of surface waters to minimize damage from flooding, soil erosion or excessive drainage. Objective 7.5. Maintain and enhance ground water recharge to the Surficial Aquifer System (SAS) so as to maintain all of the functions of the Biscayne Aquifer, including potable water supply, the abatement of saltwater intrusion, and reduce seepage from the Water Conservation Areas, while ensuring the necessary water quality protections. Policy shall encourage the use of best management practices (BMPs) in accordance with its regulations and those of the South Florida Water Management District (SFWMD). Policy shall continue to implement regulations governing stormwater management in conjunction with the Wellfield Protection Regulations. Policy will continue to implement regulations that prohibit direct stormwater discharges to surface and ground water within Zone 1 and Zone 2 of wellfield zones of influence as designated on the Wellfield Protection maps. Policy shall continue to administer and implement Chapter 27, Article XIII, Wellfield Protection, Code of Ordinances and revise, as necessary, to reflect results from modeling studies and revisions to delineation criteria. Policy shall maintain an updated integrated geographic information system inventory of public water supply wells to facilitate local and regional planning efforts. Policy in cooperation with the United States Geological Survey (USGS) and SFWMD shall support the maintenance and expansion of the regional groundwater monitoring network to assess the movement of the saltwater front and ensure adequate data for modeling the predictive progression of the front in response to sea level rise, variable climate and water management operations. Policy The Water and Wastewater Services (WWS) shall Adopted 01/13/15 Page 7-5 Ordinance Number

6 ensure that recharge resulting from agricultural uses is replaced as new development occurs. Policy shall work cooperatively with the SFWMD, municipalities, and independent and dependent drainage districts to develop and implement plans for additional surface water storage to improve the volume of regional water available for the purpose of maintaining canal levels and recharge to the SAS. Policy In order to protect and conserve the SAS, shall pursue the use of alternative water supplies (AWS) to supplement and broaden the County s future water supply sources. These potential AWS include the Floridan Aquifer, Aquifer Storage and Recovery (ASR), desalination, capture and storage of excess storm water, surface water storage, reclaimed water, and other technologies consistent with the goals of the 2013 Lower East Coast Water Supply Plan Update. Policy The Planning Council and the Planning and Redevelopment Division (PRD) shall, require applications for land use plan amendments in the flood prone portions of the County to contain sufficient data and analyses for the County to make a determination that the subsequent development: 1. shall be served by adequate stormwater management and drainage facilities, 2. shall not adversely affect ground water quality, environmentally sensitive lands, or wetlands, and 3. shall not lead to increased saltwater intrusion or area wide flooding. Policy shall utilize, preserve, restore, and enhance natural water bodies and water body functions by encouraging non-structural and structural erosion control devices and discourage the channelization, installation of seawalls or other alteration of natural rivers, streams and lakes. Policy Protect the water storage and water quality enhancement functions of wetlands, floodplains, and aquifer recharge areas through acquisition, enforcement of rules, and the application of land and water management practices which provide for compatible uses. Adopted 01/13/15 Page 7-6 Ordinance Number

7 Policy shall protect aquifers from depletion through water conservation and preservation of the functions of high recharge areas including but not limited to the water conservation areas and water preserve areas. Post Adoption Revisions 1. This Element was amendment through Ordinance No on June 26, This Element was amendment in Cycle through Ordinance No on June December 12, This Element was amendment in Cycle through Ordinance No on September, 09, This Element was amended in Cycle 2014 through Ordinance No on January 13, Adopted 01/13/15 Page 7-7 Ordinance Number