Infrastructure and Reliability


Water Infrastructure


LADWP’s Water System is the nation’s second largest municipal water utility, serving a population of about 3.8 million people within 475 square miles. The Water System supplies approximately 191 billion gallons of water annually and an average of 524 million gallons per day for the 674,000 residential and business water service connections. 


The availability of water has significantly contributed towards the tremendous growth and development of Los Angeles. Since 1902 when the population in Los Angeles was approximately 146,000 to today when the population is 3.9 million, the Water System has worked tirelessly to ensure that Angelenos receive a safe and reliable water supply. 

Water Facts & Figures

Water Infrastructure 

Tanks and Reservoirs:  114 

Pump Stations:  78 

Ammoniation Stations:  8 

Chlorination Stations:  23 

Regulator Stations:  421 

System Pressure Zones:  124 

Distribution Mains (miles):  7,263 

Fire Hydrants:  60,428 

Total Storage Capacity (acre-feet):  315,245 



LADWP maintains a vast array of infrastructure that is critical for reliably delivering high-quality water to Angelenos. With a significant amount of pipe installed at the turn of the century, LADWP is facing challenges in keeping pace with the replacement and upgrade needs of these aging water mains and riveted-steel trunk lines.

In 2013, LADWP marked the 100th anniversary of the 233-mile, gravity fed Los Angeles Aqueduct. While the Department has celebrated this historic milestone, the Water System continues to lay the groundwork for a sustainable water supply for the next century. 


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The Water System has developed a Water Infrastructure Plan, which utilizes an Asset Management Program to prioritize efforts, develop strategies, and determine the resource needs. However, with a current pipeline replacement rate of 315 years, infrastructure reliability challenges are imminent, and LADWP must take additional actions to accelerate the replacement and upgrade of its aging infrastructure.


Financial Plan

The Water System’s financial plan calls for investing over $2.2 billion in the next 10 years for infrastructure reliability.  A significant amount of these expenses—about $1 billion—will go toward replacing mainlines that have undergone a thorough assessment and have been prioritized as vulnerabilities within the water distribution system. Additional expenses will be incurred to replace and rehabilitate the Los Angeles Aqueduct, tanks and reservoirs, pump stations, pressure regulating stations, system valves, water meters, as well as ancillary infrastructure required to deliver water to its customers.




Infrastructure Replacement Goals

Infrastructure goals for FY 2014-15 include:

  • Mainline Replacement: 150,000 feet
  • Small Meter Replacement: 25,000 meters
  • Large Valve Replacement: 5 valves
  • Corrosion Protection Anode Stations Replacement: 
  • 200 stations
  • L.A. Aqueduct Concrete Top Replacement: 15,000 feet
  • Pressure Regulator Station Retrofit: 4 stations
  • Pumps and/or Motor Replacement or Rehabilitation: 
  • 14 pumps/motors
  • Water Tank Cleaning and Rehabilitation: 6 tanks


Power Infrastructure


LADWP’s Power System is the nation’s largest municipal electric utility, and serves a 465-square-mile area in Los Angeles and much of the Owens Valley. LADWP began delivering electricity in Los Angeles in 1916. Our Power System supplies more than 25 million megawatt-hours (MWh) of electricity a year for the City of Los Angeles’ 1.4 million residential and business customers as well as over 5,000 customers in the Owens Valley. LADWP offers over 7,640 megawatts (MW) of generation capacity from a diverse mix of energy sources.

The Power Infrastructure Plan (PIP) evaluates and prioritizes maintenance and replacement of major power grid equipment, including distribution, transmission, substations, and generation. The plan is expected to cost $4.5 billion through 2020.



 Power Facts & Figures

4 in-basin thermal plants
14 small hydroelectric plants
1 large hydroelectric plant
3,507 miles of overhead transmission circuits (AC and DC) spanning five Western states
124 miles of underground transmission circuits
15,452 transmission towers
6,800 miles of overhead distribution lines
3,597 miles of underground distribution cables
162 distributing stations
21 receiving stations
50,636 substructures
321,516 distribution utility poles
3,166 pole mounted capacity banks
1.3 million distribution crossarms
31,728 utilitarian streetlights
126,000 distribution transformers

Power Use

Typical residential energy use per customer is about 500 kilowatt-hours (kWh) per month.

Business and industry consume about 70% of the electricity in Los Angeles, but residents constitute the largest number of customers.

The record instantaneous peak demand is 6,396 MW reached on September 16, 2014. 


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LADWP's power system is highly reliable, ranking in the top quartile among peer utilities nationwide. A significant amount of work has been accomplished on LA’s generating plants. However, power distribution infrastructure, such as poles, overhead circuits and underground cables, is aging rapidly and requires increased investments going forward.  

The majority of LADWP’s power poles were installed during the city’s rapid growth – 1940s through 1960s.  For example, if LADWP were to replace 5,000 poles a year, it would take over 25 years to replace all of the poles that are 60-plus years old (the average expected pole lifespan).  During that time another 110,000 poles will become 60-plus years old, which would take another 22 years to replace.  Of course, not all poles over 60 years of age will need to be replaced, whereas some poles only 40 years of age may need to be replaced due to other factors. 

Another area of concern is the backlog of temporary repairs awaiting permanent repair. There are over 45,000 of these “Fix It Tickets” in the queue, and the number is growing by about 1,000 jobs per year.

Distribution System
2014-15 Goals:

  • Replace 1,560 poles
  • Replace 4,500 crossarms
  • Replace 450 transformers
  • Replace 38 miles of lead & synthetic cable
  • Resolve 5,000 "fix-it" tickets

Long-Term Goals:

Ramp up annual replacement rates by 2020 to:

  • 6,000 poles
  • 10,000 crossarms
  • 800 transformers
  • 60 miles of led & synthetic cable
  • An additional 5,000 "fix-it" tickets




Integrated Resource Plan

The Power Supply Transformation is guided by LADWP’s Integrated Resource Plan – a roadmap for transitioning out of coal while maintaining a reliable power supply, and doing so in a cost-effective manner.  The IRP has been developed through a collaborative process and is updated each year with input from customers and stakeholders.

The IRP balances key objectives of:

  • Maintaining high level of service reliability
  • Maintaining competitive rates
  • Exercising environmental stewardship, including a reduced carbon footprint

Visit  to learn more about the IRP.