Stopping future blowouts from mine shafts is the toughest of the three goals.
Sunnyside Gold Corp. has been resisting attempts made by the Environmental Protection Agency to get the company to pitch in money for the cleanup.
Many mines pose the chronic problem of relentless pollution.
New EPA tests show elevated levels of metal affecting the air quality in Pueblo. The results are linked to a smelter that was designated a Superfund site in 2014.
The EPA says it won't release public comments on its interim cleanup plan for mines in southwest Colorado, until a full plan is released.
Pruitt has been under close scrutiny for his spending and relationships with industry representatives.
After decades of cleanup, parts of a site that housed a former plant for plutonium triggers is scheduled to open to the public in 2018.
These are the largest cuts and potential impacts in EPA Region 8, which covers Colorado, Montana, North Dakota, Utah, Wyoming and 27 Tribal Nations.