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Operations & Maintenance



Specialized in maintaining GWA’s standards for quality and service. Select a team or unit below to learn about their role at GWA

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GWA Operations Department

Under the direction of the General Manager, Water Operations and Maintenance is composed of Utility Services Division Operations, Water Distribution, Water Production, Wastewater Collections and Wastewater Treatment. The Operations Department provides water and wastewater services in a safe, reliable, responsible and cost effective manner.

  • Utility Services Division OperationsOpen or Close
    The Utility Services Division Operations delivers service through dispatch, meter maintenance, asset management, and meter reading and acts as the centralized administrative support for water and wastewater.

    Administrative Support Unit

    Responsible for the tracking divisional budget balances and expenses, processing and posting of JDE Work Orders and daily well status reports, employee time keeping, payroll and performance evaluations, Inter-office communication and coordination with Private Management Contractor on wastewater and water personnel related issues. Creating, routing and maintaining records of memos and correspondences, and advising assigned employees of HR policies and procedures. This office serves to support Water and Wastewater Operations Department by delivering service both internally and externally on all procurement needs and capital improvement project support in areas of work order management and job costing to create an atmosphere of accountability.

    Dispatch Office

    Receive customer phone inquiries, complaints, water and wastewater emergency reports of outages and provide information to the public regarding the status of operations and services.

    Meter Maintenance

    Responsible for meter testing and maintenance to avoid revenue loss from under-registration of meters.

    Asset Management

    Responsible in the preventive maintenance of GWA’s over a thousand water and wastewater assets.

    Meter Reading Unit

    The Meter Reading Unit read over 41,000 water meters both electronically and manually. GWA currently operates two AMR read systems (Metron Farnier & Badger Read Center). Meter Readers also manually read all Sensus meters as well as report various water related incidents such as service line leakages, meter leaks, valve leaks, flooded meter sites, illegal connections, etc. Currently, this team does double duty by reading meters and assisting the Small Meter Task Force to change out meters.

  • Water Operations and MaintenanceOpen or Close
    Water Operations and Maintenance supplies each customer with a sufficient volume of water at adequate pressure and that it delivers safe water that satisfies the quality expectations of 42,000 customers.

    Line and Leak Repairs

    Performs repairs on water mains and service line leaks that are reported daily by residents. Carries out line replacement and maintenance of water mains , service lines, control valves, and pressure reducing valves.

    Pumping Station Operations

    Conducts 24/7 operations to monitor reservoir levels, booster pump station operations and pressure regulating valves required to maintain adequate pressures and delivery of water to service areas. Responds to daily trouble calls and water quality complaints reported to GWA. Assist Line and Leak Repair with isolation of water mains and service lines as needed.

    Booster Pump Station Maintenance

    Conduct preventive and corrective maintenance on 25 booster pump stations and 29 reservoirs. Maintenance is performed on altitude valves, flow meters, booster pumps, electrical controls, Programmable Logistic Controllers (PLC), Variable Frequency Drives (VFD) and related appurtenances for booster pump stations.

    Valve Maintenance

    Conducts Preventive and Corrective Maintenance on isolation valves for water distribution system island wide. Implemented a valve exercising program to operate valves on a regular basis and those that have not been operated in years. This allows team to isolate smaller areas when a main line break occurs.

    Fire Hydrant Maintenance

    Carries out Preventive and Corrective Maintenance on fire hydrants island wide.

    Leak Detection

    Perform leak detection to identify leaks that have not surfaced above ground. Assist with the reduction of Non-Revenue Water by addressing leaks which impacts real losses.

    GIAA

    Guam Waterworks Authority operates GIAA’s entire water system. The specific areas included are the well and transmission lines, the granular activated carbon (GAC) filter system, the reservoir, the chlorination system, the booster pump and fire pumps and the distribution system.

    Ugum

    The Ugum Water Treatment Plant turns raw river water into safe, drinkable water for the southern area of Guam (Ipan to Umatac). The Ugum Water Treatment Plant is designed to produce up to 4 million gallons per day (MGD).

  • Water ProductionOpen or Close
    Water Treatment/Production Unit is responsible for the maintenance and replacement of wells civil, mechanical and hydraulic systems components, the well vulnerability assessment and action program, well head protection program, and grounds maintenance and security at all wells, operating or not.

    Deepwell

    The Deep Well and Disinfection section of the Production Division is responsible for the extraction of Guam’s groundwater sources, ensuring that it meets established environmental quality standards, to meet daily consumption demand of our water customers. This is accomplished through professional, reliable, and certified operators of Guam Waterworks Authority.

    Electrical

    This section is in charge of trouble shooting, repair and installation of pumps, motor and control at water and wastewater pumps stations. Instruments allow GWA operators to monitor and control flow rates, pressures, levels, and other important parameters from all parts of the distribution network.

    Disinfection

    Unit in charge of maintaining the chlorine system for 120 wells on island. They are responsible in chlorine repairs, overhaul chlorine equipment, preventive and corrective maintenance.

  • Wastewater TreatmentOpen or Close
    This unit is responsible to ensure that all wastewater is treated and disposed in a manner compliant with the requirements of the GUAM EPA and US Federal Clean Water Act. The unit operates six (6) wastewater treatment plants (WWTP’s) ranging from 0.1 Million Gallons Daily (MGD) to 12 MGD capacity and two ocean outfalls. GWA’s largest wastewater treatment plant at Agana was upgraded from primary to Chemically Enhanced Primary Treatment in 2013 and completed 2014.

    Northern District Wastewater Treatment Plant

    Chemical Enhanced Primary Treatment Facility Upper Tumon and Dededo is in charge in the proper operation and maintenance to comply with National Pollutant Discharge Elimination System (NPDES) permit. This facility treats at average daily flow of 5.51 MGD and disposes of all solids generated at the Layon Landfill.

    Hagatna Wastewater Treatment Plants

    This plant located in the village of Hagatna is a Primary Treatment Facility with Chemical Enhanced Primary Treatment. In 2014 enhancement to treatment process was completed. The primary role of the staff is the proper operation and maintenance of this facility to comply with NPDES permit. This facility treats at average daily flow of 5.8 MGD and disposes of all solids generated at the Layon Landfill.

    Southern Wastewater Treatment Plants

    Consists of 4 wastewater treatment facilities which include Agat, Umatac, Inarajan, Baza Garden and Pago Socio. Presently has an operating staff of 5 employees. The primary role of the staff is the proper operation and maintenance of this facility to comply with NPDES permits.

    • Agat-Santa Rita – Secondary Treatment facility with average daily flow of approximately 1 MGD
    • Umatac – Lagoon facility with average daily flow of of 500,000 GPD.
    • Baza Gardens –This Plant is now closed and sending all effluent to the newly opened Agat-Santa Rita Wastewater Treatment Plant in Agat.
    • Inarajan – Lagoon facility with average daily flow of 100,000 GPD.
    • Pago Socia treats 3,000 gallons

  • Wastewater CollectionsOpen or Close
    This unit is responsible to ensure that all wastewater is treated and disposed in a manner compliant with the requirements of the Guam EPA and US Federal Clean Water Act. The unit operates six (6) Wastewater treatment plants (WWTPs) ranging from 0.1 MGD to 12 MGD capacity and two ocean outfalls. GWA’s largest wastewater treatment plant at Agana will be upgraded from primary to Chemically Enhanced Primary Treatment in 2013 and 2014. GWA’s new Agat-Santa Rita Wastewater treatment plants(12 MGD) was completed in July 2019 and is upgraded to secondary treatment. The Umatac- Merizo Wastewater treatment plants(.39 MGD) will be completed by July- August 2019 GWA. The new Northern District Wastewater treatment plants (12MGD) will also be upgraded to secondary treatment and will be completed by 2021.

    Pump Stations

    This section is responsible for the daily operations of 78 pump stations and responding to wastewater trouble calls such as SSOs. This section is divided into 3 districts, North, Central, & South relative to the island. The Northern district manages 22 pump stations that flow both to the NWWTP and The HWWTP. The Central district manages 27 pump stations which all flow to the HWWTP. Finally the Southern district manages 28 pump stations which contribute flow to the 4 Southern Wastewater treatment plants.

    Maintenance

    Responsible for all corrective and preventive maintenance activities for 78 sewer pump stations and 6 wastewater treatment plants island wide. Maintenance activities include all buildings, pumps, electrical components and panels, generators, and appurtenances. Furthermore the maintenance section also handles the repair and rehabilitation of sewer forcemains and gravity sewer lines.

    Fats Oils and Grease

    FOG stands for Fats, Oil and Grease. Grease is the common term for animal fats and vegetable oils. Why is FOG A Problem? When grease enters our sewer system, it acts much the same way as it does when it sticks to your pots and pans – it collects on the pipe walls and builds up until there is a clog. When a sewer line clogs, the pressure has to be released somewhere. Generally this is the lowest point available – which may mean backing up into the establishment that caused the grease, or in another building between there and the back-up. The sewage may also find a manhole and overflow – in which case it is not only a serious public health hazard, but if it gets into a storm drain and into the ocean, it’s an environmental problem as well.

  • Facility Maintenance Equipment ServicesOpen or Close
    This unit is in charge of providing technical support with regards to over 300 Fleet Maintenance, Facility Maintenance , Heavy Equipment and Support of Water and Wastewater Operations.

    Fleet Maintenance

    Unit responsible in the corrective and preventive maintenance of over 250 GWA vehicles and tracking fuel consumptions.

    Generator Maintenance

    Unit responsible in the corrective and preventive maintenance of 89 generators servicing GWA’s deepwell and pump stations.

    Heavy Equipment and Facility

    Unit responsible in the maintenance of GWA’s facilities and all of its more than 15 heavy equipments.

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