117.647—Saginaw River.
(a)
The draws of the Lake State Railways railroad bridge, mile 3.10 at Bay City, and the Central Michigan railroad bridge, mile 4.94 at Bay City, shall open on signal; except that, from December 16 through March 15, the draws shall open on signal if at least 12 hours advance notice is provided.
(b)
The draws of the Independence bridge, mile 3.88, Liberty Street bridge, mile 4.99, Veterans Memorial bridge, mile 5.60, and Lafayette Street bridge, mile 6.78, all in Bay City, shall open on signal from March 16 through December 15, except as follows:
(1)
From 6:30 a.m. to 8:30 a.m. and 3:30 p.m. to 5:30 p.m. except Saturdays, Sundays, and holidays observed in the locality, the draws need not be opened for the passage of vessels of less than 50 gross tons.
(2)
From 7:30 a.m. to 8:30 a.m. and 4:30 p.m. to 5:30 p.m. except on Sundays and Federal holidays, the draws need not be opened for the passage of downbound vessels of over 50 gross tons.
(3)
From 8 a.m. to 8 p.m. on Saturdays, Sundays, and Federal holidays, the draws of the Independence and Veterans Memorial bridges need not be opened for the passage of pleasure craft except from three minutes before to three minutes after the hour and half-hour.
(4)
From 8 a.m. to 8 p.m. on Saturdays, Sundays, and Federal holidays, the draws of the Liberty Street and Lafayette Street bridges need not be opened for the passage of pleasure craft, except from three minutes before to three minutes after the quarter hour and three-quarter hour.
(5)
From December 16 through March 15, the draws of these bridges shall open on signal if at least 12 hours notice is given.
(c)
The draw of the CSX railroad bridge, mile 18.0, need not be opened for the passage of vessels. The owner shall return the draw to an operable condition within a reasonable time when directed by the District Commander to do so.
(d)
The draw of the Grand Trunk Western railroad bridge, mile 19.2, need not be opened for the passage of vessels.