http://www.aidea.org/Portals/0/PDF%20Files/CARDNOAmblerEconomicImpactAnalysis.pdf

Here is the CARDNO study on the Ambler Industrial Road Access Road.  Lots of pages and information to include all the estimated taxes on fuel, licenses, royalties, corporate taxes, local taxes and so forth.

I agree, mining taxes are too low on larger mines, much like our production taxes from Oil & Gas are too low.  Same with the large commercial fishing operations with low taxes.