Hazen and Sawyer to Evaluate Miami International Airport Sewers

Hydraulic Modeling Part of U.S. EPA Clean Water Act Compliance

Miami International Airport

(HOLLYWOOD, FL – April 28, 2009) – Hazen and Sawyer has recently been awarded a contract to provide engineering services associated with the Miami-Dade Aviation Department’s Sanitary Sewer System Master Plan for Miami International Airport (MIA), one of the busiest airports in the world.

The Miami-Dade Aviation Department owns and operates the wastewater collection and transmission system within MIA. Wastewater is collected and discharged to Miami-Dade County Water and Sewer Department (MD-WASD) for subsequent treatment and disposal. As such, MIA is considered to be a Volume Sewer Customer (VSC) and must meet specific County Codes and Consent Decree when planning and evaluating the operation of its sewer system.

Under this contract, Hazen and Sawyer will use the SewerCAD modeling program to construct a hydraulic model of MIA’s sanitary sewer system to simulate certain prescribed conditions in order to evaluate the system’s performance. Based on the results, Hazen and Sawyer will recommend system improvements and provide a cost and implementation schedule.

Miami-Dade County VSC’s are required to complete a collection and transmission system hydraulic model to evaluate performance under certain conditions as part of the Second and Final Consent Decree entered into by the County and the U.S. Environmental Protection Agency under the Agency’s Clean Water Act. The model must be capable of evaluating the system modifications, upgrades and expansions, as well as assessing the impact of infiltration and inflow (I/I) rehabilitation programs and operational and maintenance procedures designed to optimize collection and transmission capacities. The Decree requires the implementation of a rain-dependent peak flow management study capable of characterizing I/I flows, predicting peak flows at each pump station and assessing each station’s ability to manage peak flows with one pump out-of-service, using a 2-year design rainstorm event.

More than eighty airlines serve MIA with flights to approximately 150 destinations around the globe. In 2008, more than 42 million passengers and 1.7 million tons of cargo passed through MIA on some 371,000 flights. The MIA sewer system consists of 10 miles of gravity main, 35 pump stations and 16 miles of force main with an average daily output of approximately 1.8 million gallons per day.

For more than half a century, Hazen and Sawyer has focused on two things: providing safe drinking water and controlling water pollution. Our range of services encompasses the planning, design, and construction management of water and wastewater-related projects – from clean water treatment, storage, and distribution to wastewater collection and treatment. Since our founding in 1951, we have grown in size to over 740 employees in 26 offices.

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