33 C.F.R. § 165.905
(a) The following areas of the St. Louis River, within the designated boxes of latitude and longitude, are safety zones:
(1) Safety Zone #1 (North Spirit Lake):
North Boundary: 46°41′33″ W South Boundary: 46°41′18″ W East Boundary: 92°11′53″ W West Boundary: 92°12′11″ W
(2) Safety Zone #2 (South Spirit Lake):
North Boundary: 46°40′45″ N South Boundary: 46°40′33″ N East Boundary: 92°11′40″ W West Boundary: 92°12′05″ W
[CGD09-95-026, 60 FR 52862, Oct. 11, 1995]