Question: Wyckoff Company and Pacific Creosoting Company have been located on what Washington island?

Context paragraphs:
Detroit Harbor, Wisconsin: Detroit Harbor is an unincorporated community located in the town of Washington Island on Washington Island in Door County, Wisconsin.  The Washington Island Ferry runs scheduled passenger service to Northport from Detroit Harbor.  Detroit Harbor is also home to a United States Post Office and Coast Guard Station Washington Island.

Northport, Door County, Wisconsin: Northport is an unincorporated community in the town of Liberty Grove in Door County, Wisconsin, United States.  It is the northern terminus of WIS 42 and location of the peninsula-side ferry dock of the Washington Island Ferry Line.  The ferry takes freight, vehicles, and passengers across the Porte des Morts strait to Washington Island.  A restaurant near the pier has an ATM and a public restroom.

Teraina: Teraina or Teeraina, also known as Washington Island (both names are constitutional) is a coral atoll in the central Pacific Ocean and part of the Northern Line Islands which belong to Kiribati.  Obsolete names of Teeraina are Prospect Island and New York Island.  The island is located approximately 4.71° North latitude and 160.76° West longitude.  Teeraina differs from most other atolls in the world in that it has a large freshwater lake (Washington Lake), concealed within its luxuriant coconut palm forest; this is the only permanent freshwater lake in the whole of Kiribati.

Coues's gadwall: Coues's gadwall or Washington Island gadwall ("Mareca strepera couesi") is an extinct dabbling duck which is only known by two immature specimens from the Pacific island of Teraina, Line Islands, Kiribati.  They are in the National Museum of Natural History in Washington, D.C..  The bird was named in honor of Elliott Coues.

Pacific Creosoting Company: Pacific Creosoting Company was a company founded on Bainbridge Island that treated logs with creosote as a preservative.

Creosote, Bainbridge Island, Washington: Creosote was a community of Bainbridge Island, Washington, along Eagle Harbor.  The area is directly visible from the downtown Bainbridge Island community of Winslow, and was so named because of the manufacturing and application of creosote at the now-defunct Wyckoff Company plant in the area.  The former industrial site is to the north of the community of Bill Point and east of the community of Eagledale at the southern side of the entrance to Eagle Harbor.  The site is now the city-owned Pritchard Park and is undergoing Superfund clean-up.

Washington (community), Wisconsin: Washington is an unincorporated community located in the town of Washington Island, Door County, Wisconsin, United States.  Washington is located on the north side of Washington Island along County Highway W; it is the northernmost community in Door County.

Alvin Tobias Hert: Alvin Tobias Hert (April 8, 1865 - June 7, 1921) was the mayor of Brazil, Indiana in 1895.  He was the warden of the Indiana Reformatory in Jeffersonville, Indiana in 1902.  In 1902 he was named president of the American Creosoting Company.  He was a committeeman representing Kentucky at the 1916 Republican National Convention.

Washington Island (Wisconsin): Washington Island is located about northeast of the tip of Door Peninsula in Door County, Wisconsin.  The island has a year-round population of 708 people (2010 census).  It has a land area of 60.89 km² (23.51 sq mi) and comprises over 92 percent of the land area of the town of Washington, as well as all of its population.  The unincorporated community of Detroit Harbor is located on the island.  It is the largest in a group of islands that includes Plum, Detroit, Hog, Pilot, Fish, and Rock Islands.  These islands form the Town of Washington.  A large part of Washington Island's economy is based on tourism.

Washington Island Airport: Washington Island Airport (FAA LID: 2P2) is a town owned public use airport located on Washington Island, in the Town of Washington, Door County, Wisconsin, United States.  It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a basic general aviation facility.

Supporting paragraphs: Creosote, Bainbridge Island, Washington Pacific Creosoting Company
Answer: Bainbridge Island