The cost of a noise study to monitor the impacts of a heliport near 26 Mile Haines Highway has ballooned from a Haines Borough staff estimate of about $7,000 to nearly $52,000.
The borough assembly voted in April to solicit bids for a helicopter noise study after it voted to overturn a planning commission decision and approved a conditional use permit for a sister company of heli-ski operator Southeast Alaska Backcountry Adventures to build a heliport at .6…