Russia labor camps #russia

Shimy Karni

I found testimonies written by my aunt about my fathers and his brother, my uncle.
The testimonies are about the following labor camps and I have questions about them:
1. I quote: " in the summer of 1942 i was transferred to around Archangelsk, Siberia.
I helped to build roads in order to get Coal Mines...".
I looked at Wikipedia, and I did not see coal mines in the area. 
Also I am not sure if Archangelsk is in Siberia.
Can any one advise?
2.  I quote: "From Kazan I was sent to another labor camp in Dunbar..."
Does any one knows where is this place?

Shimi Karni, Israel

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