[Code of Federal Regulations]
[Title 33, Volume 3]
[Revised as of July 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR207.320]

[Page 58-59]
 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
         CHAPTER II--CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY
 
PART 207--NAVIGATION REGULATIONS--Table of Contents
 
Sec. 207.320  Mississippi River, Twin City Locks and Dam, St. Paul and Minneapolis, Minn.; pool level.

    In accordance with the provisions of Article 8 of Federal Power 
Commission License of June 7, 1923 (Project No. 362-Minn., Ford Motor 
Co.), this section is prescribed for the control of the pool level 
created by the Twin City Locks and Dam, Minneapolis, in the interest of 
navigation, and supersedes rules and regulations made effective January 
1, 1928, by the Secretary of War:
    (a) The pool above the dam shall not be allowed to drop below 
elevation 744.5 (Cairo datum), except after loss or lowering of 
flashboards and before replacement or raising of same, during the 
navigation season; nor below elevation 743.3 during the period when the 
river is closed to navigation. The variation of pool level shall not 
exceed 0.5 foot per day whenever the pool is below elevation 745.5, and 
in addition, during the period when the river is closed to navigation, 
the maximum rate of such variation shall not exceed 0.1 foot per hour; 
except that during the navigation season, increases in pool level at 
rates greater than that specified may be made to eliminate wasting of 
water during an increase in river flow.
    (b) Whenever, due to high flows, the pool above the dam is above 
elevation 746.5, all flashboards on the crest of the

[[Page 59]]

dam shall be removed or in the lowered position.
    (c) To protect navigation in cases of emergency, such as the 
stranding of a boat or the loss of a pool below the Twin City Dam, etc., 
the licensee shall temporarily discharge water at such rates, subject to 
the limitations of paragraph (a) of this section, as may be directed by 
the U.S. District Engineer in charge of the locality.
    (d) It shall be the duty of the U.S. District Engineer in charge of 
the locality to notify the licensee of the periods during which the 
river shall be considered open to navigation.
    (e) It shall be the further duty of the said District Engineer or 
his authorized agent, by frequent inspections, to determine whether 
paragraphs (a) to (d) of this section are being observed. In case of 
noncompliance he shall so notify the licensee and report the facts to 
the Chief of Engineers.

[Regs., Feb. 24, 1938]