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Blackett Level portal is a mining structure located in Northumberland, dating to the post-medieval period when lead and coal extraction expanded significantly across the region. The portal marks the entrance to an underground mine level, representing the industrial archaeology of north-east England's extractive industries. As a surviving example of early modern mining infrastructure, it documents the technological and economic development of mineral working in Northumberland during centuries when such operations became increasingly important to local and regional commerce.
Blackett Level portal is a scheduled monument protected by Historic England under reference 1006414. View the official record →
Blackett Level portal is a mining structure located in Northumberland, dating to the post-medieval period when lead and coal extraction expanded significantly across the region. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1006414.
Blackett Level portal is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1006414.
Several scheduled monuments lie within 10 km, including Allen smelt mill, flue system and chimneys (3.6 km), Holmslinn lead mine, 200m south east of Holmes (3.7 km), Earthwork and buried remains of Stublick Colliery, immediately south east of Stublick (4.4 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Blackett Level portal's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Blackett Level portal stands on Yoredale Group, bedrock that formed in the Bashkirian. The rock here is limestone, sandstone, siltstone and mudstone.