STORM WATER SYSTEM STORM WATER SYSTEM

							MIAMI-D A D E A V I A T I O N D E P A R T M E N T
MIAMI-D A D E A V I A T I O N D E P A R T M E N T

            STORM WATER SYSTEM
            Storm Water System
n   Storm water master plans have been developed for Miami
    International Airport (MIA), Opa-Locka General Aviation Airport
    (OPF), Kendall-Tamiami General Aviation Airport (KT) , and
    Homestead Regional Airport (HARB). The master plans are state-
    of-the-art hydraulic and hydrologic computer models based on
    the federal aviation administration (FAA) approved layout plan for
    each airport.
n   Storm water master plans have allowed the aviation department
    to identify existing system deficiencies, establish the drainage
    design criteria and provide recommendations for future upgrades
    crucial to the Capital Expansion Program (CEP). In addition, the
    master plan facilitates the regulatory process.
n   The Aviation Department has obtained master permits from the
    South Florida Water Management District (SFWMD) for the
    proposed development.
MIA Storm Water Basins
    Issues and Constraints
n FAA Criteria for Airside Ponding and Pond
  Locations
n MDAD Landside LOS

n SFWMD Peak Flow Limitations

n SFWMD Runoff Treat
Calibrated and Verified Models
                   8.5

                    8
 Stage (ft-NGVD)




                   7.5
                                                     Measured
                    7
                                                     Simulated
                   6.5

                    6

                   5.5
                         0   200   400   600   800
Storm Water Program Goals
n Aircraft Safety
n Flood Control

n Water Quality Protection

n Control Groundwater




                              Level
                               of
                             Service
            Storm Water System
n   The storm water system maintenance program at MIA includes
    over 60 miles of pipe and more than 1,800 structures.
           Storm Water System
n   Drainage system improvements identified in the approved
    master plan are included into the various CEP projects.
             Storm Water System
n   Water quality has significantly improved as a result of the
    implementation of the first flush treatment system (peripheral
    inlets, grit chambers, oil/water separators and outfall boom and
    skimmers) throughout airside areas.
                BMP Treatment Train
   Tenant Responsibility                   Primary MDAD Responsibility

                                                           Monitoring


         SC                 SR          M1              CD1             TC1       TC2
Minimize Direct Runoff      Spill     Sweeping           First        Grit      Oil/Water
    Housekeeping         Prevention       &             Flush       Removal     Separator
 Materials Exposure      & Response   Scrubbing         Inlets     Chambers
     Maintenance
  Employee Training
Materials Management
Chemical Substitutions
                                                    CD4             CD3           CD2
                         Meet Discharge           Dry or Wet     Existing Wet    Booms
                                                  Detention       Systems to        &
                         Requirements                                           Skimmers
                                                                 Store/Convey
        Storm Water System
n   Surface Water Pollution Prevention Plans (SWPPP) are part
    of every construction project at MIA as required by the
    Environmental Protection Agency (EPA)
Oil-Water Separator
            Storm Water System
n   A 20-Acre storm water management pond was completed to
    further enhance water quality and attenuate airport discharges
    through Miami Springs.
MIA Storm Water Basins
Typical Dry Detention Basin


             Ru                                                    ff
               no                                                no
                 ff                                            Ru
                             Grassed         Outlet
                                             Structure
 Existing
 Grade        1

                       3
                      Infiltration     1 to 3 ft.
                                                                Seasonal High
                                                                Water Table
 Notes:
                                                                 hours
 1. Runoff is directed to the pond and detained for 24 to 30 hours before
    discharge to offsite.
 2. The first 1.0 to 2.5 in. of runoff is detained for treatment and attenuation.
                                                                 vertical.
 3. Side slopes should be no steeper than 3 horizontal to 1 vertical.
  Shallow Grassed Swale

             Existing
             Grade




                             Depth
                 1
                        50                                  Seasonal High
                                                            Water Table

Notes:
1. Slopes shall be no steeper than 50 Horizontal to 1 Vertical.
2. Swale invert shall be at least 2 to 3 ft. above the seasonal high water table.
3. Depths shall be no greater than 0.5 ft. and shall comply with FAA Circular
   for ponding.
           Storm Water System
n   Storm water is sampled and tested at various locations
    throughout the system in accordance to permit requirements.
    No violations have been issued.
       Storm Water System
n   Barriers are installed at outfalls to prevent manatees from
    entering the drainage system.
MIAMI-D A D E A V I A T I O N D E P A R T M E N T
MIAMI-D A D E A V I A T I O N D E P A R T M E N T

          Taking Necessary Steps to Meet
          Taking Necessary Steps to Meet




           The Challenges of the Future
           The Challenges of the Future