33 CFR § 117.667 - St. Croix River.
(1) From April 1 to October 31:
(i) 8 a.m. to midnight, the draws shall open on signal;
(ii) Midnight to 8 a.m., the draws shall open on signal if notification is made prior to 11 p.m.,
(2) From November 1 through March 31, the draw shall open on signal if at least 24 hours notice is given.
(b) The draw of the Stillwater Lift Bridge, Mile 23.4, shall open on signal as follows:
(1) From May 15 through October 15, daily:
(i) 8 a.m. to midnight, every half hour;
(ii) Midnight to 8 a.m., upon two hours notice.
(2) From October 16 through May 14, if at least 24 hours notice is given.
(c) The draw of the Soo Line Railroad Bridge, Mile 40.7, at Otisville, need not be opened for the passage of vessels.