Willis Mattison spent nearly three decades with the Minnesota Pollution Control Agency, much of that time in Detroit Lakes, Minn., as a regional director.
After retiring from the agency in 2001, he has remained interested in the ecology of northern Minnesota, where he still lives.
He recently began helping the Friends of the Headwaters, a newly formed citizens group, as a technical adviser on the proposed Enbridge Energy Sandpiper pipeline. The $2.7 billion project would carry North Dakota crude oil through Minnesota along a route proposed west of Park Rapids, Minn., and then east to Superior, Wis.
Mattison recently talked to the Star Tribune about pipelines and the environment.
Q: At the MPCA what experiences did you have with crude oil pipelines?
A: I was unfortunate enough to be transferred to Detroit Lakes for the PCA in the 1970s when Enbridge Energy (then called Lakehead Pipe Line Co.) experienced 13 major leaks and ruptures in a 12-month period, the largest of which was in 1979 at Pinewood [Minn.], where about a quarter million gallons of crude oil was lost from a major rupture.
Q: What was learned from that spill?
A: When pipelines are routed through very coarse soils, the lost oil is very, very difficult to recover and can rapidly move to groundwater. If there had been nearby water supplies and wells, they would have been very quickly contaminated by the oil that was lost into this coarse soil.