Seattle city has over of parkland. Seattle is located between the saltwater Puget Sound (an arm of the Pacific Ocean) to the west and Lake Washington to the east. The city's chief harbor, Elliott Bay, is part of Puget Sound, which makes the city an oceanic port. To the west, beyond Puget Sound, are the Kitsap Peninsula and Olympic Mountains on the Olympic Peninsula; to the east, beyond Lake Washington and the Eastside suburbs, are Lake Sammamish and the Cascade Range. Lake Washington's waters flow to Puget Sound through the Lake Washington Ship Canal (consisting of two man-made canals, Lake Union,
Puget Sound Naval Shipyard and Intermediate Maintenance Facility the future. Gorst Creek Ravine near Port Orchard, Washington was a hazardous waste dump for the Navy's shipyard waste between 1969 and 1970, when the site was not permitted by local authorities to take waste. After several collapses since 1997 the landfill could blow out Highway 3. The landfill is an "ongoing source of pesticides, polychlorinated biphenyls and metals flowing downstream with the potential to affect groundwater wells, sport fisheries and the Suquamish Tribe's fish hatchery. In October 2014, the US EPA ordered the Navy to fix the problems. The Puget Sound Naval Shipyard contains five historic districts: These five