Master Plan Development - City of Boca Raton

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City of Boca Raton Stormwater Management Master PlanIntroductiontidally influenced surface waters from the freshwater portion of the surface water managementsystem. The City includes approximately 5 linear miles of the Intracoastal Waterway (“ICWW”)and the communities to the east of the ICWW, from the Hillsboro Canal to approximatelyYamato Road. Refer to Figure 1.Stormwater ManagementStormwater is essentially rain water that does not percolate into the ground and is commonlyreferred to as runoff. In an urban environment, with extensive areas of impermeable surface,quantities of runoff can be substantial, and its management very challenging. The City owns andmaintains approximately 7,500 stormwater structures (inlets, catch basins, stormwater manholes,outfalls) as well as the pipes that connect them. The City’s system primarily serves roadways andolder areas of the City that were not constructed around localized stormwater managementsystems. The City’s stormwater network, along with other public and private stormwaternetworks within the City, collects and conveys runoff to canals and lakes. The City hasjurisdiction over approximately 280 acres of canals and lakes. In addition, the Lake WorthDrainage District (“LWDD”) E-3, E-3 ½, E-4 (although the City owns and maintains fromPalmetto Park Road to Clint Moore Road), and twelve lateral canals (spaced at one-half mileintervals), receive runoff and are inter-connected with the SFWMD’s C-15 and Hillsboro Canals.Ultimately, the ICWW and the Atlantic Ocean receive the discharged urban runoff from the City.Historically, stormwater management has focused on keeping water from flooding homes andstreets. While that is still a top priority, improvement in the quality of stormwater runoff hasincreasingly become both a legal requirement and a public issue for stormwater managers.PolicyThe City has set forth, in several documents, its intent to provide excellent stormwatermanagement as a component of enhancing the quality of life in the City. The management ofstormwater is the responsibility of the City’s Stormwater Utility (which is a division of MunicipalServices). The City’s Comprehensive Plan, its Strategic Plan, and its Codes & Ordinances allmake reference to providing established levels of service for both stormwater quantity andquality.Stormwater quantity refers to the protection of buildings and roadways from persistent flooding.Stormwater quality refers to minimizing the amount of pollutants in stormwater runoff. TheCity’s Comprehensive Plan established levels of service for quantity are as follows:DEVELOPMENT FEATURELowest floor – residential &NonresidentialLocal StreetsParking LotsLEVEL OF SERVICE100-year, 3-day zero discharge or FEMAFlood Insurance rate maps requirements for100-year flood elevation established bySFWMD whichever is more restrictive3-year, 24-hour rainfall3-year, 24-hour rainfallL/bocaswmp/a6016.01/InterimReport 11-27-07/r02Page 2MOCK•ROOS
City of Boca Raton Stormwater Management Master PlanIntroductionFor streets with traffic volumes which classify them above the definition of “local streets”consideration shall also be made in regards to the roadway classification.For all development projects within the City’s jurisdiction, a minimum 3-year, 1-hour storm shallbe retained prior to any discharge offsite. Beyond that, post development discharge shall notexceed pre-development discharge based on a 25-year, 3-day storm event.The LOS standards for stormwater drainage quality are as follows:DEVELOPMENT FEATURENew or Redeveloped DevelopmentLEVEL OF SERVICERetainage and/or detention requirementsDrainage Systems shall as a minimum be thefirst one-inch of runoff from the developmentproject or the total of 2.5 inches times thepercent impervious area to meet minimum waterquality criteria or shall meet the minimumrequirements of the SFWMD criteria. 1The Drainage, Coastal Management, Conservation, and Capital Improvement Elements of theCity’s Comprehensive Plan each contain policies that support development guidelines formeeting the levels of service, as well as for improving the level of service in existing developedareas.MS4 NPDES PermitThe National Pollutant Discharge Elimination System (“NPDES”) is a federal program designedto eliminate stormwater pollutant discharges to receiving waters of the United States. In 1987,the U.S. Environmental Protection Agency (“EPA”) was required under Section 402 (p) of theClean Water Act (N40CFR Part 112.26) to establish final regulations governing stormwaterdischarge permit application requirements. In 1990, the Federal Register indicated that PalmBeach County (“PBC”) was to begin compliance with the program under Phase I. The affectedparties within PBC made the decision to join together to manage the requirements that would beestablished in the forthcoming permit and in 1991, a Steering Committee was formed tocoordinate and facilitate joint activities regarding the NPDES compliance program. NorthernPalm Beach County Improvement District (“NPBCID”) continues to act as lead permittee for thePBC group and the City continues to hold a seat on the Steering Committee. In 1991/92, Part Iand Part II of the permit application were submitted and in 1997, the first 5-year permit (No.FLS000018) was issued to PBC's forty Municipal Separate Storm Sewer System (“MS4”) copermittees.In 2000, the EPA delegated responsibility for the permit program to the State ofFlorida Department of Environmental Protection (“DEP”). In November 2002, the second term1 City of Boca Raton Comprehensive Plan, 1989.L/bocaswmp/a6016.01/InterimReport 11-27-07/r02Page 3MOCK•ROOS
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City of Boca Raton Regulatory Infor
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Master Plan Development - City of Boca Raton

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