Hello

I've come across your very interesting site. I'm a Bolsover lad, though I now live in exile near Southport. My particular interest is railways, but their history is tied up with the pits, as you know.

I've spotted a couple of things which you may want to confirm, as they look a bit rum to me:

115 Langwith 
There may have been a Langwith Colliery in Sheepbridge, but there definitely was one in Langwith.

181. Sicklebrook Lane
In Dronsfield? or Dronfield?

192. Southgate
There may have been a Southgate Colliery in Chesterfield, but there definitely was one in Clowne

193. Speedwell
There may have been a Speedwell Colliery in Chesterfield, but there definitely was one in Staveley

I keep coming across a Walton Colliery in Chesterfield, South West of the town centre.

There was a West Kiveton Colliery roughly half way between Norwood (aka Holbrook No.2) and Kiveton Park Colliery in Killamarsh.

There was a Ramcroft Colliery in the Doe Lea Valley between Glapwell and Bolsover. 

Maybe you have some or all of these last three under other names, pits often seem to have multiple names.

Hope this helps

Dave

Thank you very much David, I have now corrected these apart from Walton Colliery, I will have to find more information about this.