In 2000, TransCanada turned its focus to the core businesses of natural gas transmission and power generation. Since then, we've taken advantage of opportunities to both connect and create new energy supply. We've grown our core businesses significantly through acquisition and greenfield development.
Today, we are a leading continental energy infrastructure company and, by virtue of our quality portfolio of assets, well positioned to capture opportunities for future growth.
TransCanada's network of wholly owned natural gas pipelines extends more than 59,000 kilometres (36,500 miles), tapping into virtually every major gas supply basin in North America.
TransCanada is also one of the continent's largest providers of gas storage and related services, with approximately 360 billion cubic feet of storage capacity.
A growing independent power producer, we own or have interests in more than 7,700 megawatts of generating capacity fueled by nuclear, natural gas, hydro, wind and coal.
Since 2000, we have invested approximately $11 billion and we continue to pursue opportunities to capture and deliver new supply in our core businesses and through complementary initiatives in oil pipelines and liquefied natural gas. We have identified and developed a portfolio of attractive projects that will allow us to invest more than $4 billion over the next three years alone. With the acquisition of American Natural Gas Resources Company, ANR Storage Company and an additional interest in Great Lakes Gas Transmission, our capital program is expected to exceed $8 billion over that same time period.
The results of our continued diligence in running our businesses safely, reliably and responsibly, combined with our growth initiatives, have resulted in significant value for our shareholders.