Question: WHen was the place where KZGO's transmitters are located completed?

Context paragraphs:
Maynard Town Hall and Jail: Maynard Town Hall and Jail is a historic building located in Maynard, Iowa, United States.  Before this building was constructed the town had no building to enact its business.  They used the mayor's house or place of business for his office and council meetings.  After it was completed, this building served as a jail into the late 1930s and as the city hall until 1952, when a new community building was completed.  For most of the time it served as a jail it was outfitted with bars and had bunks.  It was a short-term lock-up for those who committed minor infractions.  It was used for a public library beginning in the 1940s.  After its use as a city hall, it was bought by a local merchant for use in his grocery store in 1957.  The building was listed on the National Register of Historic Places in 1997.

Carroll Place: Carroll Place, also known as Old Carroll Place, is a historic plantation house located near St. George, Dorchester County, South Carolina.  Research completed circa 2012 at the South Carolina Archives in Columbia S.C. shows the house was built circa 1780, and is a plain two-story, Georgian I-house dwelling.  It is sheathed in clapboard single house and rests upon low brick pillars.  It has a hip roofed verandah supported by six wooden posts.  Its builder was likely Thomas Ferguson or David Campbell.  In 2008 the house was donated to the Dorchester County Historical Society by current owners Fitzhugh Lee Sweatman Jr and his wife, Martha Westbury-Sweatman.  The Dorchester County Historical Society under took an extensive restoration of the Colonial Era Plantation House and when completed, re-designated the house as the Koger-Murray-Carroll house for three of its previous owners who served in the South Carolina General Assembly: Joseph Koger (married the daughter of David Campbell and inherited the house on her death), Soule Murray (purchased the house and land from Joseph Koger), and James Parsons Carroll (purchased the property circa 1850).  James Parsons Carroll also served in the South Carolina Court of Equity as a Chancellor and was a signer of the South Carolina Ordinance of Secession.  Circa 1974 the house was added to the National Historical Register of Places as the "Old Carroll Place" for which it had become known.  The last owner/occupants of the house were the late Fitzhugh Lee Sweatman Sr and his wife Eulalie Knight-Sweatman.  Circa 1970 Mr and Mrs. Sweatman Sr built a smaller one story house off to the side of the Plantation House.  Mr. Sweatman Sr died on the property in 1975.

IDS Center: The IDS Center is an office skyscraper located at 80 South 8th Street in Minneapolis, Minnesota.  Completed in 1972, it is the tallest building in the state at a height of 792 ft .  It originally stood 775 ft , though a 16 ft garage for window washing equipment was added between 1978 and 1979.  The structure rises to 910 ft when including communications spires on the roof, indisputably the highest points in the city.  The IDS was constructed as the headquarters of Investors Diversified Services, Inc.—now Ameriprise Financial.  It also housed the headquarters of Dayton Hudson Corporation (now Target Corporation) from 1972 until 2001.

Damen station (CTA Green Line): Damen was a station on the Chicago "L" in Chicago's Near West Side neighborhood that was demolished and is planned to reopen as part of the Chicago Transit Authority's Green Line.  Construction of the new station was announced on February 9, 2017, as an infill station located at Damen Avenue and Lake Street.  At the time of the announcement, design and engineering was planned to commence in 2017, construction was expected to begin in the third quarter of 2018 and be completed in 2020.  It will fill the 1.5 mi distance between the Ashland and California stations on the Green line.  The most recently constructed "in-fill" station had been the Green Line Cermak–McCormick Place station near Wintrust Arena and McCormick Place completed in 2015, and this marks the third new CTA station announced during Rahm Emanuel's tenure as Mayor of Chicago.  It will become the closest "L" station to the United Center, while augmenting public transportation service to an emerging business corridor and residential neighborhood.  At the time of the announcement, the estimate cost was $50 million, but no designs for the station were announced.  State and federal agencies were being lobbied for funding for the station by 27th ward alderman Walter Burnett Jr. although tax increment funding (TIF) was planned if no other funding is received.  TIF funds are local property tax allotments from an area designated as being in need of development financing for necessary projects that are not likely to have sufficient funding from other sources.

KZGO: KZGO (95.3 FM) is a Rhythmic Top 40 radio station licensed to St. Paul, Minnesota, serving the Twin Cities area.  The station, known as "Go 95.3", is owned by Go Media, with sister station KQGO, through licensee Northern Lights Broadcasting, LLC.  KZGO's studios are located in the Ford Building on Fifth Avenue across from Target Field (and the similarly named METRO station) in downtown Minneapolis, while its transmitter is located atop the IDS Center.

Fenelon Place Residential Historic District: The Fenelon Place Residential Historic District is a nationally recognized historic district located in Dubuque, Iowa, United States.  It was listed on the National Register of Historic Places in 2015.  At the time of its nomination it consisted of 218 resources, which included 171 contributing buildings, two contributing structures, one contributing site, 43 non-contributing buildings, and one non-contributing structure.  The residential area that makes up the district is located on a plateau located directly above the Mississippi River Valley.  This was the first bluff-top neighborhood in Dubuque that established elevator service.  The first Fenelon Place Elevator, listed on the National Register in 1978, was completed in 1894.  Early houses on the plateau were small cottages built by lead miners.  They were replaced by large houses that were built in two periods.  The first period at the end of the 19th century saw houses built in the Italianate, Gothic Revival, Second Empire, and Queen Anne styles.  House in the second period in the beginning of the 20th century were largely built in the Classical Revival and Tudor Revival styles.

Hwangseong Park: The Hwangseong Park is a park located in the neighborhood of Hwangseong-dong, Gyeongju, North Gyeongsang province, South Korea.  Many of public sport facilities are located in the park with an area of 1,022,350㎡ including a luxuriant pine trees forest.  The site is originally where Doksan was situated, an artificial forest established in regards to "feng shui" during the Silla period.  The Doksan forest was used as a training place for hwarang warriors, and a recreation venue as well as a hunting place for the Silla Kings, especially the 26th ruler, King Jinpyeong's favorite place.  Since 1975, Hwangseong Park has been designated as "city neighborhood park" and currently consists of multi-purposed Gyeongju Public Stadium, Football Park with 7 football fields and one futsal field, and one gymnasium, as well as Horimjang field for "gukgung" or Korean traditional archery and a ssireum wrestling ring.  In addition, it contains a gateball field, an inline skating rink, jogging courses, and cycling roads.  Among them, the construction of Gyeongju Public Stadium was completed in 1982.  and can accommodate 20,000 audience.

List of tallest buildings in New Orleans: The city of New Orleans, Louisiana, United States, is the site of 106 completed high-rises, 36 of which stand taller than 250 ft .  The tallest building in the city is One Shell Square, which rises 697 ft in the New Orleans Central Business District and was completed in 1972.  It also stands as the tallest building in the state of Louisiana.  The second-tallest skyscraper in the city is Place St. Charles, which rises 645 ft .  Nine of the ten tallest buildings in Louisiana are located in New Orleans.

WVTV: WVTV, virtual channel and UHF digital channel 18, is a CW-affiliated television station located in Milwaukee, Wisconsin, United States.  The station is owned by the Sinclair Broadcast Group, as part of a duopoly with MyNetworkTV affiliate WCGV-TV (channel 24).  The two stations share studio facilities located on Calumet Road in the Park Place office park near the I-41/U.S. 45 Interchange on Milwaukee's northwest side; WVTV's transmitter is located on North Humboldt Boulevard in Milwaukee's Estabrook Park neighborhood at the MPTV Tower (sharing the tower site with the transmitters of WCGV, and Milwaukee PBS member stations WMVS and WMVT).

List of tallest buildings in Tulsa, Oklahoma: Tulsa, the second largest city in the U.S. state of Oklahoma, is the site of 26 completed high-rises over 200 ft , 4 of which stand taller than 492 ft .  The tallest building in the city is the BOK Tower, which rises 667 ft in Downtown Tulsa and was completed in 1975.  It also stands as the 2nd-tallest building in Oklahoma.  The second-tallest skyscraper in the city is the Cityplex Central Tower, which rises 648 ft and was completed in 1979.  The First Place Tower, completed in 1975 and rising 516 ft , is the third-tallest building in Tulsa.  Five of the ten tallest buildings in Oklahoma are located in Tulsa.

Supporting paragraphs: KZGO IDS Center
Answer: 1972