Occasionally I work in Longmont Colorado. Just outside yown is a magnificent indoor range called Triggertime. The owner was more than happy to explain all the process he went through (contacts, Federal EPA requirements, HVAC,etc). The indoor 100yd range with target retrieval was VERY nice. It's the quietest range I've ever been in.
Article:
http://longmontledger.com/longmont-c...easing-demand/
Telephone#
http://www.switchboard.com/results.h...&semSessionId=