Sunset Boulevard Bridge

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Sunset Boulevard Bridge
Sunset Boulevard Bridge.jpg
View from northwest in 2008
Coordinates 47°39′00″N117°26′53″W / 47.6500°N 117.4480°W / 47.6500; -117.4480
CarriesSunset Boulevard
Crosses Latah Creek
Locale Spokane, Washington, U.S.
Other name(s)Latah Creek Bridge
Named for Sunset Boulevard
Characteristics
Design Arch bridge
Material Reinforced concrete
Total length1,070 ft (330 m)
Width45 ft (14 m)
Height64 ft (20 m)
Longest span150 ft (45.7 m)
History
Construction cost$416,000 (1911) [1]
Opened1913 [2]
Location
Sunset Boulevard Bridge
Sunset Boulevard Bridge
Built1911
ArchitectMorton McCartney & J.F. Cunningham
NRHP reference No. 82004293
Added to NRHPJuly 16, 1982

The Sunset Boulevard Bridge, also known as the Latah Creek Bridge, is a deck arch bridge in the northwestern United States that spans Latah Creek in Spokane, Washington. The bridge connects the neighborhoods of Browne's Addition on the east, and Downtown Spokane just beyond that, with West Hills to the west. Latah Creek, which passes under the bridge, separates the two neighborhoods. It was built 113 years ago in 1911 by the city of Spokane, and was designed by Morton McCartney & J.F. Cunningham, with J.F. Greene serving as the construction engineer. [1]

Contents

It is the northernmost of three bridges which cross Latah Creek in its immediate area. High Bridge is located to the south, and carries a BNSF railroad. Interstate 90 crosses Latah Creek just to the south of the rail bridge. All three pass over High Bridge Park, which takes its name from the bridges.

History

Prior to the construction of the present Sunset Boulevard Bridge, a timber railroad trestle crossed Latah Creek at the same location. The old timber trestle was demolished, but the railroad leading to the bridge remained during construction, and was used to deliver the concrete to the construction site of the current bridge. [1]

Construction began on the Sunset Boulevard Bridge in 1911, making it the second of Spokane's large, concrete arch bridges, after the shorter-in-length but taller Monroe Street Bridge. [1] It was opened to traffic two years later in 1913. [2]

The bridge would become seen as ahead of its time in terms of the traffic it would carry. It was built to handle highway level traffic in the earliest days of the automobile, long before highways were on the map. [2] The Sunset Boulevard Bridge carried the Sunset Highway starting from the latter's opening in 1915. Sunset Highway was known by a number of official names, such as State Road No. 2, one of Washington's first highways to cross the state west-to-east, and later as U.S. Route 10. The bridge carried the primary west-to-east highway into Spokane, by many names and numbers, until the arrival of the Interstate Highway System. [3] In 1963, the Sunset Boulevard Bridge was bypassed by the adjacent I-90 bridge, which carried the new interstate into and through the city. [4]

As the bridge approached its 100th birthday, the City of Spokane commissioned a study from CH2M Hill on options for rehabilitating the bridge. The 2012 study cost $631,000, which was provided by federal grants. [2] In the years prior to the study, deterioration on the bridge deck led the city to reduce the number of lanes from four to two. The study found that the bridge arches, particularly in the center where they were designed to carry rail traffic, were still strong. They determined the bridge was still safe, but that the deck would need to be replaced, similar to what was done to the Monroe Street Bridge a few years prior to the study. [5]

In July 2023, the Spokane City Council approved a $64 million budget to make repairs to the aging bridge. [6]

Description

The Sunset Boulevard Bridge is a 1,070-foot long concrete arch bridge made up of seven semi-circular, or Roman, arches. [1] The arches are of varying sizes, with the two largest spanning 150 feet in length, with 135-foot arches on either side of those, one 128-foot arch to the west, and a pair of 54-foot abutment arches on each end. [7] Unlike Spokane's other large concrete arch bridge, the Monroe Street Bridge, which was constructed contemporaneously and used a flattened arch, the Sunset Boulevard Bridge was designed with semi-circular arches due to its specific setting. The semi-circular arches exert thrust in a way better suited for the large and heavier than usual piers required for the sandy ground along Latah Creek that they would be built upon. [1] Each of the five main arches support four spandrel arches, while the two abutment arches have closed spandrels. These spandrels support the 45-foot roadway above, which was originally topped with ornamental pillars made of cast iron, [1] though they were removed sometime before 2014. [7] Steel for the structure was manufactured by the Lackawanna Steel Company and the concrete was supplied by the Inland Portland Cement Company. [1]

The bridge carries two lanes [5] of Sunset Boulevard, a primary arterial as classified by the city. It is the only arterial crossing Latah Creek and one of just two arterials crossing Latah Creek or the Spokane River, on the west side of the city. [8] It connects the West Hills neighborhood on the west with Browne's Addition, and the city center, on the east.


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References

  1. 1 2 3 4 5 6 7 8 "National Register Digital Assets". nps.gov. National Park Service. Retrieved July 10, 2022.
  2. 1 2 3 4 Brunt, Jonathan (March 19, 2012). "As Sunset bridge nears 100th birthday, city considers rehab". The Spokesman-Review. Retrieved July 10, 2022.
  3. ↑ Ott, Jennifer. "Sunset Highway". historylink.org. HistoryLink. Retrieved July 10, 2022.
  4. ↑ "New Span". Spokane Daily Chronicle. June 6, 1963. p. 3. Retrieved July 9, 2022– via Newspapers.com.
  5. 1 2 "Then and Now: Latah Creek Bridge". The Spokesman-Review. November 18, 2019. Retrieved July 12, 2022.
  6. ↑ Wixey, Will (July 14, 2023). "City Council approves $64 million budget to repair Sunset Bridge". KXLY. Retrieved August 1, 2023.
  7. 1 2 "Sunset Boulevard Bridge". historicbridges.org. historicbridges.org. Retrieved July 12, 2022.
  8. ↑ "Official Arterial Street Map" (PDF). spokanecity.org. City of Spokane. Retrieved July 12, 2022.
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