NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

1O518667 - FOURMILE BEND TO COLUSA

INDEX:
NOTE A
POLLUTION REPORTS
SUPPLEMENTAL INFORMATION
CAUTION
NOAA VHF-FM WEATHER BROADCASTS
CAUTION
BRIDGE AND OVERHEAD CABLE CLEARANCES
SACRAMENTO RIVER DEPTHS


NOTE A
Navigation regulations are published in Chapter 2, U.S. Coast Pilot 7.  Additions or revisions to Chapter 2 are published in the Notice to Mariners.  Information concerning the regulations may be obtained at the Office of the Commander, 11th Coast Guard District in Alameda, California or at the office of the District Engineer, Corps of Engineers in Sacramento, California.
Refer to charted regulation section numbers.


POLLUTION REPORTS
Report all spills of oil and hazardous substances to the National Response Center via 1-800-424-8802 (toll free), or to the nearest U.S. Coast Guard facility if telephone communication is impossible (33 CFR 153).


SUPPLEMENTAL INFORMATION
Consult U.S. Coast Pilot 7 for important supplemental information.


CAUTION
Only marine radiobeacons have been calibrated for surface use.  Limitations on the use of certain other radio signals as aids to marine navigation can be found in the U.S. Coast Guard Light Lists and National Imagery and Mapping Agency Publication 117.
Radio direction-finder bearings to commercial broadcasting stations are subject to error and should be used with caution.


NOAA VHF-FM WEATHER BROADCASTS
The National Weather Service station listed below provides continuous marine weather broadcasts.  The range of reception is variable, but for most stations is usually 20 to 40 miles from the antenna site.

Sacramento, CA		KEC-57		162.55 MHz


CAUTION
Bridge and cable horizontal clearances not subject to tidal influence are referenced to ordinary summer low water level.  During flood stage levels, clearances may be reduced by 29 feet or more.


BRIDGE AND OVERHEAD CABLE CLEARANCES
Clearances are charted as furnished by the Corps of Engineers.  Overhead cable clearances are referred to high water.  Bridge clearances are referred to High Water (HW) and Low Water (LW).


SACRAMENTO RIVER DEPTHS
Although the soundings on this chart depict the general trends in depths, they are unreliable because of continual scouring or shoaling due to changing river stages.  Areas which frequently shoal to the extent that passage of vessels drawing over 4 feet is difficult at extreme low water stages.
The Federal project provides for a shallow-draft channel, 6 feet deep at low water, from Sacramento to Colusa.  The Corps of Engineers conducts annual maintenance dredging operations to provide project depth.  Consult the District Engineer in Sacramento for controlling depths.


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