Robbins Basin Sacramento River Flood Stages
River level is measured at both the Tisdale Weir
and Knights Landing.
BELOW 51'-Tisdale Weir / 40'-Knights Landing Planning
& Preparation Phase:
Planning and preparing for an emergency. The river has flowed over the banks of
the main channel, and government assumes a readiness condition without formally
alerting the general public.
ABOVE 51'-Tisdale Weir / 40'-Knights Landing Ready
for Action Phase:
All those in the area should be ready for an Advisory Evacuation Notice or
Mandatory Evacuation Order to be given at any time.
ABOVE 54'-Tisdale Weir / 43.5'-Knights Landing
Emergency Phase:
At this point, the likelihood of a Mandatory Evacuation of the basin becomes
much greater. A Mandatory Evacuation will probably be called in the near future,
and there will be little or no time for individuals or business owners to take
further protective actions. It is crucial for persons to pay close attention to
emergency information provided by the County and City and be ready for evacuation
at a moments notice.
There are numerous factors that contribute to the flood danger present at any
given time. For example, factors that contribute to the river level, the length
of time the water has been on the levee, the number of times water has been on
the levee in the season, the forecasted weather, the forecasted river crest,
the releases from the upstream dams, the time of day, and the number of people
to evacuate are all considered before an evacuation is ordered. There is no way
to pre-determine how all the factors will combine in any given storm or rainy
season to provide hard and fast levels for evacuation. Be assured that
evacuation decisions are always seriously considered and evacuation orders are
only issued when absolutely necessary.
ADVISORY EVACUATION:
An Advisory Evacuation Notice is issued when conditions exist which indicate a
Mandatory Evacuation order may be given in the near future. The threat to
lives is not yet imminent, but due to the potential for rapidly changing
conditions to develop into a serious threat, the public is advised to prepare
for the issue of a Mandatory Evacuation order.
Residents are advised to leave the area. (Those with special evacuation needs,
such as care facilities or those with special transportation needs are
particularly encouraged to leave as soon as possible after the Advisory
Evacuation is issued.)
Businesses are advised to take whatever precautions they deem necessary for
protecting equipment and / or inventory. Access to the area under an Advisory
Evacuation is unrestricted.
Advisory Evacuations may also be issued when a Mandatory Evacuation order has
been lifted in an area but the conditions in the area remain subject to rapid
change and could again become serious.
MANDATORY EVACUATION:
A Mandatory Evacuation is ordered when conditions exist that seriously imperil
or endanger the lives of those in a defined area. The danger is imminent.
All non-essential persons are ordered to immediately leave the area via the
described evacuation routes. Generally, residents will not be forcibly removed
from their own property; however, those found to be on the property of another,
or on a public roadway, may be subject to arrest or removal from the area.
Once out of the area, people (including residents) will not be permitted to
return until conditions permit. Any non-essential persons found by officials
traveling through, or loitering in, the area will be escorted out and not
permitted to re-enter the area. Those interfering with the disaster response
are subject to arrest.
|
|