<strong>City</strong> <strong>of</strong> <strong>Boca</strong> <strong>Raton</strong> Stormwater Management <strong>Master</strong> <strong>Plan</strong>Introductiontidally influenced surface waters from the freshwater portion <strong>of</strong> the surface water managementsystem. The <strong>City</strong> includes approximately 5 linear miles <strong>of</strong> the Intracoastal Waterway (“ICWW”)and the communities to the east <strong>of</strong> 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 run<strong>of</strong>f. In an urban environment, with extensive areas <strong>of</strong> impermeable surface,quantities <strong>of</strong> run<strong>of</strong>f can be substantial, and its management very challenging. The <strong>City</strong> owns andmaintains approximately 7,500 stormwater structures (inlets, catch basins, stormwater manholes,outfalls) as well as the pipes that connect them. The <strong>City</strong>’s system primarily serves roadways andolder areas <strong>of</strong> the <strong>City</strong> that were not constructed around localized stormwater managementsystems. The <strong>City</strong>’s stormwater network, along with other public and private stormwaternetworks within the <strong>City</strong>, collects and conveys run<strong>of</strong>f to canals and lakes. The <strong>City</strong> hasjurisdiction over approximately 280 acres <strong>of</strong> canals and lakes. In addition, the Lake WorthDrainage District (“LWDD”) E-3, E-3 ½, E-4 (although the <strong>City</strong> owns and maintains fromPalmetto Park Road to Clint Moore Road), and twelve lateral canals (spaced at one-half mileintervals), receive run<strong>of</strong>f and are inter-connected with the SFWMD’s C-15 and Hillsboro Canals.Ultimately, the ICWW and the Atlantic Ocean receive the discharged urban run<strong>of</strong>f from the <strong>City</strong>.Historically, stormwater management has focused on keeping water from flooding homes andstreets. While that is still a top priority, improvement in the quality <strong>of</strong> stormwater run<strong>of</strong>f hasincreasingly become both a legal requirement and a public issue for stormwater managers.PolicyThe <strong>City</strong> has set forth, in several documents, its intent to provide excellent stormwatermanagement as a component <strong>of</strong> enhancing the quality <strong>of</strong> life in the <strong>City</strong>. The management <strong>of</strong>stormwater is the responsibility <strong>of</strong> the <strong>City</strong>’s Stormwater Utility (which is a division <strong>of</strong> MunicipalServices). The <strong>City</strong>’s Comprehensive <strong>Plan</strong>, its Strategic <strong>Plan</strong>, and its Codes & Ordinances allmake reference to providing established levels <strong>of</strong> service for both stormwater quantity andquality.Stormwater quantity refers to the protection <strong>of</strong> buildings and roadways from persistent flooding.Stormwater quality refers to minimizing the amount <strong>of</strong> pollutants in stormwater run<strong>of</strong>f. The<strong>City</strong>’s Comprehensive <strong>Plan</strong> established levels <strong>of</strong> 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
<strong>City</strong> <strong>of</strong> <strong>Boca</strong> <strong>Raton</strong> Stormwater Management <strong>Master</strong> <strong>Plan</strong>IntroductionFor streets with traffic volumes which classify them above the definition <strong>of</strong> “local streets”consideration shall also be made in regards to the roadway classification.For all development projects within the <strong>City</strong>’s jurisdiction, a minimum 3-year, 1-hour storm shallbe retained prior to any discharge <strong>of</strong>fsite. 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 <strong>Development</strong>LEVEL OF SERVICERetainage and/or detention requirementsDrainage Systems shall as a minimum be thefirst one-inch <strong>of</strong> run<strong>of</strong>f from the developmentproject or the total <strong>of</strong> 2.5 inches times thepercent impervious area to meet minimum waterquality criteria or shall meet the minimumrequirements <strong>of</strong> the SFWMD criteria. 1The Drainage, Coastal Management, Conservation, and Capital Improvement Elements <strong>of</strong> the<strong>City</strong>’s Comprehensive <strong>Plan</strong> each contain policies that support development guidelines formeeting the levels <strong>of</strong> service, as well as for improving the level <strong>of</strong> 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 <strong>of</strong> the United States. In 1987,the U.S. Environmental Protection Agency (“EPA”) was required under Section 402 (p) <strong>of</strong> 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 <strong>City</strong> continues to hold a seat on the Steering Committee. In 1991/92, Part Iand Part II <strong>of</strong> 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 <strong>of</strong>Florida Department <strong>of</strong> Environmental Protection (“DEP”). In November 2002, the second term1 <strong>City</strong> <strong>of</strong> <strong>Boca</strong> <strong>Raton</strong> Comprehensive <strong>Plan</strong>, 1989.L/bocaswmp/a6016.01/InterimReport 11-27-07/r02Page 3MOCK•ROOS