[Code of Federal Regulations]

[Title 33, Volume 3]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 33CFR207.425]



[Page 73-74]

 

                TITLE 33--NAVIGATION AND NAVIGABLE WATERS

 

 CHAPTER II--CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF 

                                 DEFENSE

 

PART 207_NAVIGATION REGULATIONS--Table of Contents

 

Sec.  207.425  Calumet River, Ill.; Thomas J. O'Brien Lock and 

Controlling Works and the use, administration and navigation of 

the lock.



    (a) Controlling Works. (1) The controlling works shall be so 

operated that the water level at the downstream end of the lock will be 

maintained at a level lower than that of Lake Michigan, except in times 

of excessive storm



[[Page 74]]



run-off into the Illinois Waterway, or when the lake level is below 

minus 2 feet, Chicago City Datum.

    (2) The elevation to be maintained at the downstream end of the lock 

shall at no time be higher than minus 0.5 feet, Chicago City Datum, and 

at no time lower than minus 2.0 feet, Chicago City Datum, except as 

noted in paragraph (a)(1) of this section.

    (b) Lock--(1) Operation. The Thomas J. O'Brien Lock and Dam is part 

of the Illinois Waterway which is a tributary of the Mississippi River. 

All rules and regulations defined in Sec.  207.300, Ohio River, 

Mississippi River above Cairo, Illinois, and their tributaries; use, 

administration and navigation shall apply.



[40 FR 57358, Dec. 9, 1975]