ionospheric observatory, was established in 1941 and closed down in 1947. It was located on the north side of Old Chelsea Road a few hundred yards west of Highway 105. The Chelsea station operated during the post-war period but in 1947, its work was transferred to the Defence Research Board's new Radio Propagation Laboratory in Ottawa. Shortly thereafter, the station was demolished. Today, there are no traces of the single shack or the many masts that were once erected on the property. Demographics Mother tongue: English as first language: 43.1% French as first language: 46.3% English and French as first language: 3.9% Other as first language: 5.6% Transportation Autoroute 5, also known as the Autoroute de la Gatineau, is a major freeway that connects Chelsea and La Pêche with Gatineau and Ottawa. Public transportation is provided to the region by Transcollines, with bus routes 921, 922, 923, 924, and 925 connecting the regional county municipality with Gatineau as of 2022. During summer weekends, the Societé de Transport de l'Outaouais provides free shuttle buses through Gatineau Park that terminate at the Gatineau Park Visitors Centre in Old Chelsea. Gallery See also List of municipalities in Quebec Camp Fortune Chemin de fer de l'Outaouais Gatineau River Yacht Club Hull-Chelsea-Wakefield Railway Ryan Tower References Official Transport Quebec Road Map External links Municipality of Chelsea Website Incorporated places in Outaouais Municipalities in Quebec National Capital Region (Canada)