Seven Arches Built to Carry Away Stone: The Takamatsu Spoil-Line Bridge
Most bridges are built to carry people or goods toward somewhere useful. This one was built to carry away the part of the mine that nobody wanted. Running across a stretch of ground about 430 metres southeast of the Tenryu pit in Yubari, the Takamatsu spoil-line arch bridge once supported the track that hauled waste rock out to the largest spoil heap in the city. Seven semicircular concrete arches march across the ground in a steady rhythm, each spanning six metres, the whole structure fifty-nine metres long and a generous 8.6 metres wide.
The waste it served has a name in Japanese mining: zuri, the broken rock and unusable material left after coal is cut and after the ore is washed and sorted. A working colliery produces enormous quantities of it, and disposing of it was a logistical problem in its own right. Hokutan, the Hokkaido Colliery and Railway Company, built a dedicated disposal line at Takamatsu, roughly 800 metres in total, to move the spoil clear of the pit. This bridge was one link in that line.
A Workhorse Recognised for Its Place in the Landscape
The bridge was registered as a Tangible Cultural Property on 18 October 2006, as number 01-0074, in the same batch that listed the nearby pit portals and tunnels. Built in 1951, it belongs to the postwar peak of Yubari coal, when the field was producing well over a million tonnes a year and the machinery of disposal had to keep pace with the machinery of extraction. The listing places it in the category of industrial civil-engineering work and names its contribution to the historic landscape as the reason for protection.
That landscape argument is easy to see on the ground. The spoil this line carried piled up into the Takamatsu spoil heap, the biggest in Yubari, a shaped hill of mine waste that has long drawn painters and photographers. The arch bridge reads as the human-made counterpart to that artificial mountain: one structure moved the stone, the other is the stone, and both together describe the sheer scale of what a coal field discards in the course of its work.
Reading the Structure on a Visit
Approach from the side and count the arches. The repetition of seven identical semicircles is the bridge's defining feature, a viaduct-like cadence built in reinforced concrete rather than the brick or stone of older arcades. The six-metre span of each opening is modest, which keeps the whole thing low and grounded, hugging the contour it was built to follow.
The bridge sits within a short walk of the other surviving pieces of the disposal line. The skip tunnel lies about 140 metres to the east, and the belt-tunnel portal about 500 metres to the west, so the three together let you trace the path the waste rock took on its way to the heap. Seen in isolation the bridge is a handsome concrete arcade; seen as part of the line, it becomes a chapter in a longer story about the unglamorous, essential work of keeping a mine open.
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Q&A
- What is "zuri," and why did it need its own railway?
- Zuri is the waste rock and unusable material left over from cutting coal and washing ore. A mine produces it in huge volume, so Hokutan built a dedicated 800-metre disposal line at Takamatsu to move it out to a spoil heap.
- How big is the bridge?
- It is fifty-nine metres long and 8.6 metres wide, carried on seven semicircular reinforced-concrete arches, each with a span of six metres.
- What is the spoil heap it served?
- The Takamatsu spoil heap, the largest in Yubari, formed from the waste carried along this line. It has long been a subject for painters and photographers in the area.
- When was it built and registered?
- It was built in 1951 and registered as a national Tangible Cultural Property on 18 October 2006, as number 01-0074.
- What else from the disposal line survives nearby?
- The skip tunnel about 140 metres east and the belt-tunnel west portal about 500 metres west both remain, letting visitors follow the route the waste rock once took.
Basic Information
| Name | Former Hokutan Yubari Colliery Takamatsu Spoil-Line Arch Bridge |
|---|---|
| Location | Takamatsu, Yubari City, Hokkaido |
| Designation | Registered Tangible Cultural Property (Structure), registered 18 October 2006, No. 01-0074 |
| Date | 1951 (Showa 26) |
| Structure | Reinforced-concrete seven-arch bridge; length 59 m, width 8.6 m; each arch semicircular, span 6.0 m |
| Quantity | 1 structure |
| Access | An outdoor structure in the Takamatsu district; verify current access locally |
References
- National Database of Designated Cultural Properties, Agency for Cultural Affairs
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00005708
- Cultural Heritage Online (National Institutes for Cultural Heritage)
- https://online.bunka.go.jp/heritages/detail/181926
- Registered Tangible Cultural Properties of Yubari City, City of Yubari
- https://www.city.yubari.lg.jp/soshiki/14/1706.html
Last verified: 2026.06.25