Title: Millennium Tower (San Francisco)
Content:  16 in with a 2 in tilt at the base and an approximate 6 in tilt at the top of the tower. The building is leaning toward the northwest, and has caused cracks in the building's basement and the pavement surrounding the tower. As of 2018, the sinking had increased to 18 in with a lean of 14 in. The developer blames the sinking problem on the Transbay Joint Powers Authority (TJPA), who were responsible for construction of the neighboring Transbay Transit Center (TTC). The sinking problem had reportedly started before TTC construction even broke ground, and TJPA asserted the 
Title: Millennium Tower (San Francisco)
Content:  pilings would be tied to the existing foundation to mitigate further sinking. The building's tilting problem came under renewed scrutiny following the deadly collapse of Champlain Towers South in Surfside, Florida, in June 2021. The repair project was halted in August 2021 after monitoring indicated that the building had unexpectedly sunk an additional inch on the Fremont Street side after 39 of the 52 piles were installed. The one inch drop translates to an additional 5 inches of lean on the 58th floor. On September 10, 2021, San Francisco city officials told Millennium Tower management to not resume construction work until the city reviews an updated construction approach.
Title: Millennium Tower (San Francisco)
Content:  On December 4, 2018, Ronald Hamburger, the senior principal engineer at Simpson Gumpertz & Heger, revealed in a press release on a final resolution to the Millennium Tower's tilting and sinking problem by underpinning the building. The solution will involve the installation of 52 piles along the north and west sides of the tower beneath the sidewalk that reach down 250 ft (76.2 m) into the bedrock of downtown San Francisco and be tied with the original 60–90 ft (18.3–27.4 m) deep foundation piles. It is estimated that about 50% of the tilt will be evened out over a period of 10 years as the south and eastern 
Title: Millennium Tower (San Francisco)
Content:  After developers apparently disclosed in 2015 that the building was sinking and tilting, the public was notified of the problem in 2016. Treadwell & Rollo's geotechnical design for the foundation of the main tower consists of a concrete slab built on 60 to 90 ft concrete friction piles through the fill and young bay mud, and embedded into dense Colma sand. A number of other buildings in 301 Mission Street’s area have used similar systems, although due to varying earth conditions, others have pushed piles directly into the bedrock 200 ft below. An examination in 2016 showed the building had 
Title: 555 California Street
Content:  555 California Street, formerly Bank of America Center, is a 52-story 779 ft skyscraper in San Francisco, California. It is the fourth tallest building in the city as of February 2021, and in 2013 was the largest by floor area. Completed in 1969, the tower was the tallest building west of the Mississippi River until the completion of the Transamerica Pyramid in 1972, and the world headquarters of Bank of America until the 1998 merger with NationsBank, when the company moved its headquarters to the Bank of America Corporate Center in Charlotte, North Carolina. It is currently owned by Vornado Realty Trust and The Trump Organization.
Title: Transamerica Pyramid
Content:  The Transamerica Pyramid at 600 Montgomery Street between Clay and Washington Streets in the Financial District of San Francisco, California, United States, is a 48-storey futurist skyscraper and the second tallest building in the San Francisco skyline. It was the tallest building in San Francisco from its completion in 1972 until 2018 when the newly constructed Salesforce Tower surpassed its height. The building no longer houses the headquarters of the Transamerica Corporation, which moved its U.S. headquarters to Baltimore, Maryland. However, the building is still associated with the company by being depicted on the company's logo. Designed by architect William Pereira and built by Hathaway Dinwiddie Construction Company, the building stands at 853 ft. On completion in 1972 it was the eighth-tallest building in the world. It is also a popular tourist site. In 2020, the building was sold to NYC investor Michael Shvo.
Title: List of tallest buildings in San Francisco
Content:  San Francisco, California, in the United States, has at least 482 high-rises, 58 of which are at least 400 ft tall. The tallest building is Salesforce Tower, which rises 1070 ft and is the 17th-tallest building in the United States. The city's second-tallest building is the Transamerica Pyramid, which rises 853 ft, and was previously the city's tallest for 45 years, from 1972 to 2017. The city's third-tallest building is 181 Fremont, rising to 802 ft (244 m). San Francisco has 27 skyscrapers that rise at least 492 feet (150 m). Six more skyscrapers of over 150 m are under construction, have been approved for construction, or have been proposed. Its skyline is currently ranked second in the Western United States (after Los Angeles) and sixth in the United States, after New York City, Chicago, Miami, Houston, and Los Angeles.
Title: Millennium Tower (San Francisco)
Content:  has been hired by Millennium Partners to provide an engineering study on the sinking problem. Some experts have prognosticated that the cost to fix the tilt could exceed the liability insurance held by Millennium Partners and the building's various construction vendors. If the TJPA is found to be at fault, San Francisco taxpayers could end up paying for the repairs. , a city inspection found that the building was still safe to occupy, though there was damage to the foundation and electrical system. In March 2017, the homeowners association filed suit against Millennium Partners, Webcor, Handel Architects, Treadwell & 
Title: 555 California Street
Content:  the Transamerica Pyramid, 555 California Street shows the direction San Francisco's downtown was moving during the 1960s before campaigns against high-rise buildings in the 1970s and 1980s forced development to move south of Market Street. With its top spire, the Transamerica Pyramid is taller; but 555 California has the higher habitable space. In April 2018, the United States Geological Survey included 555 California Street in a list of 39 high-rise buildings in San Francisco constructed during a period when welding techniques were employed that may jeopardize structural integrity during a strong earthquake. A 70 percent interest was acquired by Vornado Realty Trust from foreign investors in March 2007 with a 30 percent limited partnership interest still owned 
Title: Salesforce Tower
Content:  Salesforce Tower, formerly known as the Transbay Tower, is a 1,070 ft office skyscraper in the South of Market district of downtown San Francisco. It is located at 415 Mission Street between First and Fremont streets, next to the Transbay Transit Center site. Salesforce Tower is the centerpiece of the San Francisco Transbay redevelopment plan. The plan contains a mix of office, transportation, retail, and residential uses. This was the last building designed by César Pelli to be completed in his lifetime. Upon its completion in 2018, it became the tallest skyscraper in the San Francisco skyline, with a top roof height of 970 ft and overall height of 1070 ft, surpassing the 853 ft Transamerica Pyramid. It is also the second-tallest building west of the Mississippi River after the 1100 ft Wilshire Grand Center in Los Angeles. The Salesforce Tower is taller than the Wilshire Grand if decorative spires are excluded, and with a taller roofline than Los Angeles' U.S. Bank Tower, the Salesforce tower is tallest according to roofline.

Question: a 58-story skyscraper in san francisco is tilting and sinking?
Answer: Millennium Tower.