A local member owned mutual cooperative electrified in 1925 – providing electric and water services to over 25,000 members. O ... ur service territory includes the Gig Harbor and Key Peninsulas, extending to roughly the Tacoma Narrows (on the south) to the Kitsap County line (to the north), covering 112 square miles in Western Pierce County, Washington. Peninsula Light Company is the second largest cooperative in the state of Washington. read more