HomeMy WebLinkAboutCC AG PKT 2002-08-26 #H AGENDA REPORT
DATE: August 26, 2002
TO: Honorable Mayor and City Council
THRU: John B. Bahorski, City Manager
FROM: Doug Dancs, P.E., Director of Public Works / City Engineer
SUBJECT: RECEIVE AND FILE: CONSTRUCTION OF SAND
BERM/DIKE
SUMMARY OF REQUEST:
Receive and File.
BACKGROUND:
Historically, the residents along the beach between the Anaheim Jetties and the pier are
subject to wave inundation during the winter storms. This is lessened by the annual
construction of the sand berm and regular sand "backpassing,"
In 1984, Moffatt Nichol Engineers prepared a report outlining recommendations for \`
building the berm and sand management strategies. Attached are the recommendations
and the profile of the berm. This profile was developed to provide protection against
events but is no guarantee. A sand dike so massive as to protect against all storms no
matter how severe would outweigh the costs of repairing the damage caused by such
storms.
Last year the staff completed the berm in late September due to the storm events that
occurred in recent prior years. It is a matter of risk management versus views and
estimated probability outcomes. Staff recommends and intends to place the berm one
week earlier, starting September 16, 2002, to provide an additional level of protection
with the possibility of an "El Nino" type weather and tides.
Cattrac Construction will perform the work and a multi -year contract was approved by
Council in August 2001 for both operators and equipment to construct the berm. Cattrac
Construction has been the company that the Beach Maintenance Division has used in the
past to perform this work.
FISCAL IMPACT:
Due to the nature of this work, it is performed on a time and material basis not to exceed
the amount available in the maintenance and capital budget for sand maintenance.
Agenda Item TT
RECOMMENDATION:
. Receive and File.
APO. .
Doug Danc , P.E., Director of Public Works /City Engineer
NO D�� 1 ? 'PROVED:
fr i ' /
Jo . Bahorski, City Manager
ATTACHMENT 1
RECOMMENDED PROFILE OF BERM
Winterization of Seal Beach
Moffatt and Nichol Engineers
October 1994
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ATTACHMENT 2
RECOMMENDATIONS FROM REPORT FOR BERM CONSTRUCTION
Winterization of Seal Beach
Moffatt and Nichol Engineers
October 1994 _
,
Recommendations:
1. Build the winter dike by November 1 and remove it before the Easter Holiday
2. Build the dike with a crest elevation of +20 feet MLLW between 11 Street and
Dolphin Street. Between Dolphin Street and the Anaheim Bay Jetty and between
11 ` Street and the pier the elevation may be reduced to +18 feet MLL W.
3. Locate the dike as close to the existing line of planters as possible and have a
width of 8 feet.
4. Use sand between the sidewalk and dike to construct the dike but do not remove
below level of the sidewalk. If there is not enough sand in this area to construct
the dike push up additional sand from as far seaward as possible and haul sand
from the east part of the cell or from the west part of the west cell.
5. Scarify the sand behind the dike as necessary to promote percolation of the
surface water. Remove standby water with portable pumps.
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