Are both The Bridge and Grand Canyon documentary films?
yes
Title: Grand Canyon (1958 film)
Passage: Grand Canyon is a 1958 American short documentary film directed by James Algar and produced by Walt Disney Productions.  It was shown as a supplement during "Sleeping Beauty's" initial run, and it won an Academy Award at the 31st Academy Awards in 1959 for Best Short Subject (Live Action).  It is also included as a bonus feature on the 1997 laserdisc, 2003 DVD, and 2008 DVD & Blu-ray releases of "Sleeping Beauty".
Title: Grand Canyon Depot
Passage: Grand Canyon Depot, also known as Grand Canyon Railroad Station, was constructed in 1909-10 for the Atchison, Topeka and Santa Fe Railway at the South Rim of the Grand Canyon, in what is now Grand Canyon National Park.  It is one of three remaining railroad depots in the United States built with logs as the primary structure material.  The station is within 100 m of the rim of the canyon, opposite the El Tovar Hotel, also built by the railroad.  The depot is designated a National Historic Landmark.
Title: The Bridge (2006 documentary film)
Passage: The Bridge is a 2006 British-American documentary film by Eric Steel spanning one year of filming at the famed Golden Gate Bridge which crosses the Golden Gate entrance to San Francisco Bay, connecting the city of San Francisco, California to the Marin Headlands of Marin County, in 2004.  The film captured a number of suicides, and featured interviews with family and friends of some of the identified people who had thrown themselves from the bridge that year.
Grand Canyon (1958 film) The Bridge (2006 documentary film)