| Historic Name: |
Broad Street Substation Crane Tower |
Common Name: |
|
| Style: |
Art Deco, Art Deco - Streamline Moderne |
Neighborhood: |
Queen Anne |
| Built By: |
|
Year Built: |
1951 |
| |
| Significance |
|
In the opinion of the survey, this property appears to meet the criteria of the National Register of Historic Places. |
|
In the opinion of the survey, this property appears to meet the criteria of the Seattle Landmarks Preservation Ordinance. |
|
|
City Light constructed this reinforced concrete crane tower in 1949-51 as part of the Broad Street Substation complex. After the end of the Second World War and the concomitant shortages in labor and materials, City Light prepared plans for additional transmission lines, substations and unit load center equipment in anticipation of increasing demands for electricity by new residential, commercial and industrial customers. These plans included construction of a new receiving substation north of downtown at 6th Avenue North and Broad Street. New 115,000-volt transmission lines would tie this new substation to another new substation in Bothell as well as to the older North Substation. Located outside of the city limits, the Bothell Substation would be built to receive electricity from the existing Skagit River dams as well as the new Ross Dam still under construction. Using the network of 115,000-volt transmission lines, Bothell would then transmit the electricity at a lower voltage to the city’s other receiving substations for distribution throughout the city.
After several years of construction, the Broad Street Substation was energized on November 8, 1951 along with the Bothell Substation, increasing the system’s receiving capacity by a maximum of 125,000 kilowatts. Supplied by the Bothell Substation and tied to the North Substation, the Broad Street Substation served the area south of the Lake Washington Ship Canal and north of the downtown business district. In 1952, the recently purchased Canal Substation was tied into the Broad Street Substation as well. New power generating sources came on line at the same time, which took advantage of the improvements to the distribution network within the city. In 1951, an additional 48,000-kilowatt generator was installed at the Gorge Plant, and three 90,000-kilowatt generators were installed at Ross Dam between 1952 and 1954.
During 1951, two 1,500-kilowatt rectifier units were also installed at the Broad Street Substation, which went into service the following year. The rectifiers were necessary in order to convert conventional Alternating Current (AC) to the Direct Current (DC), which powered the Seattle Transit System’s electric trolley buses. More than a decade earlier, the City had converted its electric streetcar system of public transportation to the trolley buses. Within ten years, further modernizations were necessary to supply Direct Current to the Transit System with higher efficiency and reduced conversion costs. The modern Mercury Arc rectifiers, which replaced the obsolete rotary equipment, also allowed non-attended operation of conversion facilities. From 1951-1955, City Light added equipment at the new Broad Street Substation and constructed new substations at South, University, North, Avalon, Fremont, Leary, Gatewood, and Olympic Hill. The electric trolley buses operated throughout the City for another decade until 1963, when diesel buses replaced them north of the Ship Canal and south of Spokane Street. Ten years later, the Municipality of Metropolitan Seattle (METRO) took over the Seattle Transit System, ending over fifty years of municipal control of the City’s public transportation system.
Although nearly devoid of ornamentation, this building exhibits some Streamline Moderne and Modernistic design elements. More impressive is the entire substation complex when viewed as a whole. Unlike earlier substation sites, which developed in a piecemeal fashion over time, this complex, occupying a full city block, has a unity of design throughout, which ties it together visually. With its distinctive stylistic features, this building is significant for its associations with the growth and development of City Light and with the municipally owned public transportation system and its modernization during its years of operation.
|
|
| |
| Appearance |
| Completed in 1951, this four-story reinforced concrete building is located at the northwest corner of a large site, which covers an entire city block bounded by Harrison and Thomas Streets and by Taylor and 6th Avenues North. Two additional buildings are located on the site, a control building along 6th Avenue North on the eastern side and a shop attached to this building’s east elevation. Electrical transmission and distribution lines fill much of the remainder of the site, which also contains modern buildings with additional equipment. The original concrete wall surrounds the site, however a later steel mesh fence installed on top of the wall now provides further security. This reinforced concrete building has a rectangular plan, which measures approximately 46 feet by 60 feet. The Modern design of this flat roof structure displays some Streamline Moderne stylistic influences. These include a smooth concrete exterior incised with lines to create square panels set in strong horizontal bands and a curved one-story office wing, which extends from the principal north elevation and connects with the shop on the east. Two large openings with multi-paned steel sash windows dominate the curved west elevation of this small office wing, which measures approximately 14 feet by 21 feet. A single entrance door is set in a recessed opening at the southern end. Sheet metal lines the coping of the parapet wall above the windows.
The massive crane tower features a large opening on the north elevation covered by a shallow roof supported on diagonal tapered brackets. A "CITY LIGHT BROAD STREET SUBSTATION" is situated on the façade below the roof and above the large overhead doors contained within the opening. The north and south elevations each have three small window openings located near the very top of the wall, while the east elevation has five at the same level on an otherwise blank wall. The south elevation also has a single entrance door and a large two-story opening, which contains an overhead metal door, aligned with the opening on the north elevation. The west elevation has a column of decorative concrete panels extending the height of the building at the southern end. The northern end of this elevation has a two-story opening covered with corrugated glass or plastic. Distinguished by its uniform site development, this building is well maintained with excellent physical integrity. |
|
|
