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SEE TEXT OF CLOSURE
NOTICE FOR DETAILS
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San Joaquin County Geographic Information Systems
SouthStockton,
to
1810 East Hazelton Avenue,
CA 95205
The information on this map is based on the most current information available to San Joaquin County Geographic Information Systems.
The County of San Joaquin does not warrant its accuracy or suitability for any particular purpose.
The information on this map is not intended to replace engineering, financial or primary records research.
Printed: 03/21/2017 DB
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03/29/2017 - Updated South & Central Delta River and Slough Closures
(Refer To Closure Map For Further Details)
As of this notice all Rivers and other South and Central Delta waterways highlighted on the attached
map(s) remain closed to recreational boating traffic (with some exceptions noted below) until further
notice by the San Joaquin County Office of Emergency Services.
Primary Closure Area:
The pink area highlighted on the map is closed to recreational boating traffic. That closed area
includes: the San Joaquin River from the south County Line with Stanislaus County to the San
Joaquin River Deep Water Channel; Fabian And Bell Canal; Grant Line Canal east of the bridge at
Tracy Boulevard; Old River and its tributaries (including Tom Paine Slough, Salmon Slough &
Paradise Cut) to the south and east (upstream) of Hammer Island at the Alameda County
boundary with San Joaquin County to the San Joaquin River; Middle River upstream from
Trapper Slough at the Highway 4 bridge. (Note – Victoria Canal and North Victoria Canal are
removed from the Primary Closure Area and are restricted as described in the orange
highlighted exception area below and on the map.)
Exceptions:
1) Orange Highlight on Map – These areas in the Central Delta, generally south and west of the San
Joaquin River Deep Water Channel are subject to the following restrictions :
a. 5 MPH (No Wake) speed restriction for all boaters, two hours before posted high tide,
through two hours after posted high tide.
b. No speed restriction for all boaters, outside of the four-hour high tide window described
in section “a” above.
2) Mildred Island will be the designated recreational area for pleasure boaters in the South and
Central Delta while waterway closures remain in effect. This area can be used by wakeboard
boaters, wave runners, jet skis, water-skiers and other personal water craft with the following
restrictions:
a. 5 MPH (No Wake) speed restriction for all boaters on the perimeter of Mildred Island,
one hour before posted high tide, through one hour after posted high tide.
b. No speed restriction for all boaters on the perimeter of Mildred Island, outside of the
two-hour high tide window described in section “a” above.
3) None of the closures or restrictions listed above or shown on the attached map applies to
emergency vessels, commercial vessels, or vessels operating to perform maintenance,
inspection and/or repair to Delta levees as approved by the San Joaquin County Office of
Emergency Services.
4) Please keep in mind that waves against the levees, particularly at high tides may cause erosion
to the levee which increases the threat to the levees.
Frequently Asked Questions
a. Why are so many rivers and sloughs closed?
i. The releases of water up river, combined with heavy rains have caused the
rivers and sloughs in the South Delta to reach extremely high levels on
surrounding levees. Wakes from boats at high tides, could pose a risk to levee
stability in some areas.
b. How long will the closures be in place?
i. The closures are dependent on water levels in the Delta systems which fluctuate
with rain events and possibly again in spring or early summer as the snow melts
in the surrounding mountains. Closures are lifted or modified by the San Joaquin
County, Office of Emergency Services.
c. What happens if I boat on a closed river or slough?
i. County Sheriff Marine Patrol divisions and the United Sates Coast Guard will be
enforcing the closures.
d. Where is recreational boating allowed while the closures are in effect?
i. During the appropriate times outlined in this directive, recreational boating is
permitted in the North Delta, in the Central Delta where highlighted in Orange
or any river or slough not closed by the San Joaquin County Office of Emergency
Services (see attached highlighted map).
e. Will bridge operators open bridges on closed rivers and sloughs?
i. Only for emergency boat traffic while the closures are in place (Orwood Railroad
Bridge, Bacon Island Bridge, and MacDonald River Bridge will open per their
normal schedules and all other bridges not in a closed area).
f.
How do I find out about bridge schedules and when high tide is on any given day?
i. You can find bridge and tide information at, DeltaBoating.com
ii. http://deltaboating.com/tides/orwood.php
g. Who do I contact if I have questions regarding this directive?
i. San Joaquin County Office of Emergency Services, (209) 953-6200