much on references to primary sources . please improve this by adding secondary or tertiary sources . february 2009 learn how and when to remove this template message peco energy type subsidiary founded 1881 headquarters peco building philadelphia pennsylvania united states parent exelon website http www.peco.com peco formerly the philadelphia electric company is an energy company founded in 1881 and incorporated in 1929 . it became part of exelon corporation nyse exc in 2000 when it merged with unicom . the company has approximately 2 300 employees ; its call center and field craft personnel are members of ibew local 614 . peco serves 1.6 million electric and 485 000 natural gas customers ; it is the largest combination utility in pennsylvania and has a franchise utility service area of 2 100 square miles 5 400 km2 with a population of 3.8 million people . contents 1 electricity and natural gas 2 facilities and infrastructure 3 revenues 4 controversies 5 references 6 further reading 7 external links electricity and natural gas edit peco s peak electric load occurred on august 3 2006 and was 8 932 megawatts mws and its highest peak load in the winter season occurred on december 20 2004 and was 6 838 mw . residential electric usage makes up about 35 percent of peco s total electric delivery and half of the annual electric revenue . peco s electric sales tend to peak in the summer and winter seasons driven by air conditioning and heating load when extreme temperatures create greater demand . the company s natural gas sales are generally higher during the winter periods when cold temperatures create demand for heating . the company s highest gas sales occurred on jan. 17 2000 and was 718 000 000 000 cubic feet 2.0 1010 m3 of gas . gas usage by residential customers is approximately half of peco s total deliveries . the peco transition period for the competitive electric generation market ended on dec. 31 2010 when caps on retail rates and competitive transition charges on customer bills ended . peco electric rates had been capped for 12 years . peco expects to purchase all of its wholesale electricity from competitive market sources subsequent to 2010 with retail customers charged the actual costs of procurement . according to exelon sec form 10 k for the year 2012 nuclear energy supplied 53 % of power supplied fossils and renewables provided 12 % of power supplied and purchased power provided 35 % of power supplied . facilities and infrastructure edit peco owns maintains and operates 1 067 miles 1 720 km of higher voltage transmission lines 15 260 square miles 39 500 km2 of underground distribution cable and 12 933 miles 20 810 km of aerial distribution lines . on the gas side peco owns maintains and operates 12 157 miles 19 560 km of transmission distribution and service pipes . peco has a liquefied natural gas storage facility in west conshohocken pa . with capacity of 1 200 000 000 cubic feet 34 000 000 m3 and a propane air plant in chester pa . with storage capacity of 1 980 000 us gallons 7 500 m3 . the company also owns 29 natural gas city gate stations at locations that link with various interstate pipelines . they built the chester waterside station of the philadelphia electric company and it was listed on the national register of historic places in 2007 . 1 revenues edit peco s total assets are valued at 9.8 billion . the company delivered 87 700 000 000 cubic feet 2.5 109 m3 of natural gas and 39.5 billion kilowatt hours of electricity in 2008 generating 5.5 billion in revenue . peco s utility business is capital intensive and requires significant investments for the electric and gas delivery systems to ensure adequate capacity and reliability for customers . peco s anticipated capital expenditures for 2009 are estimated at 400 million about three fourths for the electric business nearly 20 percent for gas and the rest is common.the company pays about 510 million in local state and federal income and other taxes annually . controversies edit in the 1970s through the 1980s community activist pressure contributed to the delayed opening of nuclear power plants at peco s limerick generating station and the temporary cancellation of the planned limerick 2 nuclear power plant pa . 2 both limerick 1 and limerick 2 were built and producing power by 1990 . in 2015 the earth quaker action team began protesting peco to demand that it expand the amount of solar energy that it buys and to source solar power from north philadelphia in order to create jobs . 3 peco purchases enough solar energy to power 2 000 residential households . twice each year in march and september it submits those plans to the pennsylvania s state regulators for approval . the utility runs the bidding process through a third party for energy suppliers and wholesalers . peco s sister company constellation is the third largest developer in pennsylvania of solar installations for commercial industrial government and customers and its parent company exelon has a portfolio of wind generating power projects across the country . 4 peco currently generates 0.14 % of its energy portfolio from solar energy 5 but could generate up to 20 % of their portfolio from solar . sourcing solar energy from rooftop solar panels could generate up to 4000 new jobs in philadelphia . 6 references edit national park service 2010 07 09 . national register information system . national register of historic places . national park service . u.s. anti nuclear activists partially block establishment of nuclear power plant in limerick pa 1977 82 global nonviolent action database accessed april 6 2016 . https nvdatabase.swarthmore.edu content us anti nuclear activists partially block establishment nuclear power plant limerick pa 1977 protesters demand peco support solar development in n. phila . the philadelphia inquirer march 25 2016 . http articles.philly.com 2016 03 25 business 71786984 1 ben armstrong peco north philadelphia clergy activists demand more clean energy from peco philadelphia tribune march 24 2016 . http www.phillytrib.com news clergy activists demand more clean energy from peco article 619b5371 eb06 5e91 8fb6 00632a914901.html 2014 annual report alternative energy portfolio standards act of 2004 pdf . retrieved apr 6 2016 . quaker group says north philly solar panels could meet peco power target this year . stateimpact pennsylvania . retrieved 2016 04 07 . exelon corporate annual report to shareholders 2008 2009 further reading edit wainwright nicholas b. history of the philadelphia electric company 1881 1961 published by the philadelphia electric company external links edit peco energy company website media related to chester waterside station of the philadelphia electric company at wikimedia commons v t e philadelphia area corporations including the delaware valley list of companies based in the philadelphia area philadelphia based fortune 500 corporations rank in the 2015 list comcast 43 aramark 207 crown holdings 318 delaware valley based fortune 500 corporations rank in the 2015 list amerisourcebergen 16 dupont 87 lincoln national 223 universal health services 324 campbell soup 342 ugi 349 burlington stores inc. 500 other notable philadelphia based businesses amoroso s beneficial bank chemtura day & zimmermann fmc corporation independence blue cross pennsylvania real estate investment trust pep boys philadelphia media network radian group urban outfitters notable philadelphia based professional partnerships ballard spahr blank rome cozen o connor dechert drinker biddle & reath duane morris morgan lewis & bockius pepper hamilton saul ewing white and williams other notable delaware valley based businesses actua corporation airgas alliedbarton ametek aqua america asplundh bentley systems brandywine realty trust boscov s carpenter technology cephalon chemours christiana care health system crozer keystone health system david s bridal epam systems enersys hamilton lane liberty property trust penn mutual penn national gaming rita s italian ice sei investments slm sungard susquehanna international group vanguard toll brothers triumph group unisys viropharma vishay intertechnology vwr wawa wilmington trust w. l. gore and associates wsfs bank notable delaware valley based us headquarters of foreign businesses aberdeen asset management ace agustawestland astrazeneca delaware investments glaxosmithkline ing group keystone foods sap america siemens medical shire pharmaceuticals subaru teva pharmacueticals td bank notable delaware valley based division headquarters of us corporations acme cerberus capital management centocor johnson & johnson colonial penn conseco delmarva power exelon gsi commerce ebay hercules ashland mab paints sherwin williams mcneil laboratories j & j neoware hewlett packard peco exelon qvc liberty media rohm and haas dow chemical sunoco energy transfer tasty baking flowers foods retrieved from https en.wikipedia.org w index.php title peco energy 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