Military Wiki
Supply Depot
The Supply Depot, from Carl Hall Road
Alternative names Building 151, Supply Depot #1, The Bunker
General information
Type Military, industrial
Location 40 Carl Hall Road, Toronto, Ontario, Canada
Coordinates 43°44′59″N 79°28′46″W / 43.74985°N 79.47935°W / 43.74985; -79.47935Coordinates: 43°44′59″N 79°28′46″W / 43.74985°N 79.47935°W / 43.74985; -79.47935
Completed 1954
Owner Downsview Park
Technical details
Floor area 81,470 m2 (876,900 sq ft)
Other information
Parking Outdoor

The Supply Depot is a large warehouse located at Downsview Park in Toronto, Ontario, Canada.

The former military structure—built to withstand a nuclear attack—is today used as a farmer's market, film studio, and venue for the Toronto Roller Derby.

Entering the Supply Depot after a nuclear attack

The decontamination centre was underground near the office building
Individuals would shower and dress in clean clothing
Then join others in the Supply Depot's bomb shelter


In 1952, the Canadian federal government acquired an airfield and several buildings and complexes located in the north Toronto neighbourhood of Downsview. A de Havilland Canada aircraft production facility was already located there, and the site would eventually become Canadian Forces Base Downsview.[1]

Several new buildings were constructed, including a massive warehouse used for storage and shipping. The "Supply Depot", completed in 1954, consisted of a one-story 81,470 m2 (876,900 sq ft) warehouse with an adjoining two-story office building.[1]

The Depot's location was ideal for shipping and receiving, with a Canadian National Railway mainline along the building's east side, and a spur-line connected to the north side. The newly constructed Ontario Highway 401 was a short distance south.[1]

The building was commonly referred to as the Supply Depot, though de Havilland named it "Building 151" in accordance with a numbering system they used. The Department of National Defence adopted this and officially named the structure Building 151.[1] The Treasury Board of Canada later referred to the building as "Supply Depot #1".[2]

The building became the central supply location for the Canadian military, and contained everything from screws and nails, to aircraft engines and wings.[3] The main floor was so vast that workers moving from station to station rode bicycles.[4]

When CFB Downsview closed in 1996, a portion of the former base—including the Supply Depot—became part of Downsview Park, the first national urban park in Canada. In 1998, the Supply Depot became one of 11 properties at the site listed on a municipal heritage inventory.[1]


The Supply Depot is a unique example of Cold War military construction in Canada, with heavily reinforced concrete used to create a fortress-like structure designed to survive a nuclear blast.[1] The walls are 1.5 ft (0.46 m) thick, and the flat roof is a 2 ft (0.61 m) thick slab of exposed concrete supported by columns spaced 40 ft (12 m) apart.[1][3][5]

In the Supply Depot's basement are two 6 ft (1.8 m) deep, 660,000 imp gal (3,000,000 L) water reservoirs used to supply the fire sprinkler system, and the roof was designed to store up to 1 ft (0.30 m) of water as a backup supply.[3][6]

On the building's south side is a door leading to a "Decontamination Centre", where individuals could enter the Supply Depot following a nuclear attack. The heavily-reinforced building also contained a bomb shelter.[7]

An architectural review from 2009 wrote, "the building was constructed during the period of Cold War and reflects the uncertain mood of the time with its tough envelope and back-up systems".[3]:56


The Supply Depot is used as a farmer's market and movie studio. Doors Open Toronto tours have also been conducted there. Since mid-2011, Toronto Roller Derby has played its home games in the south end of the building, known as The Bunker,[8][9] including its hosting of the inaugural Roller Derby World Cup in 2011.[10]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"Inclusion on City of Toronto Inventory of Heritage Properties – 1133-1377 Sheppard Avenue West" (PDF). Director, Urban Design, City Planning Division, City of Toronto. February 4, 2014.
  2. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"Supply Depot #1". Treasury Board of Canada. Retrieved April 2014. {{cite web}}: Check date values in: |accessdate= (help)
  3. 3.0 3.1 3.2 3.3 <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"Downsview Area Secondary Plan, Heritage Building Conservation Study Review: Built Heritage Resources" (PDF). E.R.A. Architects. May 2009.
  4. Rich, Marv (1998). Gardam, John. ed. History of the Toronto & Region Division. General Store. p. 55. 
  5. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"Downsview Park Film Studios". Downsview Park. Retrieved April 2014. {{cite web}}: Check date values in: |accessdate= (help)
  6. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>Kidd, Kenneth (January 10, 2010). "Downsview Dilemma". Toronto Star.
  7. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"Reinventing Downsview". January 23, 2010.
  8. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"On Wheels". Downsview Park. Retrieved 12 April 2014.
  9. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>"Toronto Roller Derby". Toronto Roller Derby. Retrieved 12 April 2014.
  10. Ormsby, Mary (26 November 2011). "The inaugural World Cup of women’s roller derby sparks Olympic hopes". Retrieved 12 April 2014. 

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