Miami-Dade County South District Wastewater Treatment Plant HLD Upgrade, Oxygenation Train #7, MIAMI, FL

CLIENT OBJECTIVES

• Upgrade the Miami-Dade South District Wastewater Treatment Plant to incorporate a 285 million gallon-per-day (mgd) capacity reclaimed water filtration system and to meet Florida Department of Environmental Protection (FDEP) High Level Disinfection (HLD) reclaimed water standards
• Increase water quality to the equivalent of primary drinking water standards
• Facilitate the use of treated wastewater to be used as electrical cogeneration cooling water and for irrigation of green space at Zoo Miami (previously known as Miami Metro Zoo).

VALUE DELIVERED

The project was completed approximately eight months ahead of schedule at a final price of approximately $900,000 less than the original contract price. Planning, pilot testing, design, and construction were fast-tracked.

SOLUTIONS

P&K was responsible for scheduling, coordination, procurement, and execution of all aspects of construction of the facilities and process equipment. Due to the high volume of construction work being conducted on the site by other contractors outside of the filter project (14 other construction contracts were under way concurrently), successful completion of the project required extremely close coordination and cooperation with the Owner, Engineer, and other construction contractors.

SCOPE OF SERVICES

Construction consisted of the following main components:

• One new enclosed 2,155 s.f. x 14' deep cast-in-place concrete structure with a concrete cover for oxygenation of the treated process stream
• An adjoining 1,720 s.f. cast-in-place concrete flume and weir structure
• These two structures were also equipped with two 60" sluice gates, one 78" x 66"slide gate, two 40-horsepower positive displacement blowers with associated valves, piping, oxygen diffusers, and accessories for oxygen service, one 10-horsepower purge blower, and twelve surface aerators.
• Approximately 450 linear feet of 96", 72", 54", 36", 24", and 16" pre-stressed concrete cylinder pipe (PCCP) and ductile iron pipe (DIP), as well as other extensive yard piping, including a connection to an existing 96" PCCP main
• All associated site work, electrical, and instrumentation and controls

BACKGROUND

In 2004, Miami-Dade Water and Sewer Department (MDWASD) entered into a Consent Decree with the United States Environmental Protection Agency which mandated that the County’s South District Wastewater Treatment Plant be upgraded to incorporate a 285 million gallon per day (mgd) capacity reclaimed water filtration system. In addition, the Decree mandated that the facility meet Florida Department of Environmental Protection (FDEP) High Level Disinfection (HLD) reclaimed water standards, as well as water quality equivalent to primary drinking water standards. This facility will be the largest in Florida to treat wastewater to these stringent standards, and the treated wastewater will be reclaimed for use as electrical cogeneration cooling water and for irrigation of green space at Zoo Miami (previously known as Miami Metro Zoo). Due to the aggressive completion schedule mandated in the Decree, planning, pilot testing, design, and construction were fast-tracked.

OPERATING COMPANY:
Poole & Kent Company of Florida

CLIENT:
Miami-Dade Water & Sewer Department

ENGINEER:
Miami-Dade Water and Sewer Department

GENERAL CONTRACTOR:
Poole & Kent Company of Florida

SCHEDULE:
May 2008 to July 2009

COST:
$8,831,950 (final price $7,900,000)

	Traditional Delivery
	Design-Build
	Construction Management
	Prime Contractor
	New Construction
	Retrofit/Renovation
	Existing Facility