 Grinkle Mine culvert | |
| Location | |
|---|---|
.svg)  Grinkle Mine Location within North Yorkshire | |
| Location | Roxby |
| County | North Yorkshire |
| Country | England |
| Coordinates | 54°32′57″N 0°49′26″W / 54.5491°N 0.8240°W |
| Production | |
| Products | Ironstone |
| Production | 4,000 tonnes (4,400 tons) |
| Financial year | 1929 |
| History | |
| Opened | 1875 |
| Closed | 1934 |
Grinkle Mine, was an ironstone mine working the main Cleveland Seam near to Roxby in North Yorkshire, England. Initially, the ironstone was mined specifically for the furnaces at the Palmer Shipbuilders in Jarrow on the River Tyne, but later, the mine became independent of Palmers. To enable the output from the mine to be exported, a 3-mile (4.8 km) narrow-gauge tramway was constructed that ran across three viaducts and through two tunnels to the harbour of Port Mulgrave, where ships would take the ore directly to Tyneside.
During the First World War, the threat of wartime action on the harbour at Port Mulgrave led to a connection being built from the mine site direct to the Whitby to Loftus railway line just to the north of the mine head. Whilst this allowed for the closure of the port to shipping in 1917, the tramway stayed open to transport miners from Port Mulgrave to the minesite. The mine first ceased production in 1921, with sporadic years of mining taking place, however the mine closed for good in 1930. Part of the site is now underneath the surface workings of the Boulby Mine complex, though some buildings remain at ground level.