Redondo Beach - Beach Renourishment Project
Redondo Beach Renourishment Project
Funded by the County of Los Angeles Beaches and Harbor and Managed by the Army Corps of Engineers.
For the week of 9/4/2012 - 9/7/2012
1. The team will continue off-shore deposits next week.
2. On-shore replenishment will continue.
3. A total of five team members are allocated at the onshore site for beach for safety purposes.
As part of U.S. Army Corps of Engineer's Marina Del Rey Maintenance Dredging Project, the beach area between the Topaz and Ruby street intersections will be nourished with 75,000 cubic yards of clean sand. An additional 85,000 cubic yards of clean sand from Marina Del Rey's north entrance will also be deposited in an offshore storage site (approximately 500 yards offshore/southwest of the Topaz Street lifeguard tower) for future renourishing efforts.
The nourishment operation will include the pumping of clean sand from a barge stationed in the ocean waters through a pipe to the beach. A spreader (i.e., bull-dozer) will distribute the pumped sand along the beach within the project limits. The nourishment will occur continuously in a 24 hour period for approximately 45 days.
Work crews will strive to minimize noise disruption to residents and beachgoers during the beach nourishment and will adhere to city noise ordinances. During offshore placement, noise from the tugboat and the scow releasing sand into the pit about 500 yards from shore may be audible during the twice-daily deposits lasting about 30 minutes. The noise disruption from the onshore sand placement should be limited to the intermittent sound of a bulldozer used to spread the sand during daytime hours.
The dredged sand deposited onshore will increase the size of Redondo Beach over a 450-yard-long (1,350 feet) stretch of beach between Topaz jetty and Ruby Street, elevating parts of the beach to make it uniformly level and increasing the width of the driest part of the beach by 60 to 100 feet, depending on location. Overall, the dry part of the beach will appear higher and wider.
We appreciate and thank you for your patience during this beach improvement project.
Below is additional project information from the Los Angeles County Beaches and Harbor.
You can also contact the city for information at (310) 995-9800 or email@example.com.
- How much sediment is coming to Redondo Beach?
About one million cubic yards of sediment has been dredged from the Marina Del Rey harbor entrance. The Army Corps Of Engineers has dredged 160,000 cubic yards of clean sand from the Marina’s north entrance and will barge it to a point just offshore at Redondo Beach, southwest of the Topaz jetty. About 75,000 cubic yards of the sand sediment will then be placed onshore between the jetty and the beach area at roughly Ruby Street. The remaining 85,000 cubic yards will stay offshore for any renourishment needs in the near future.
- Is the sand going to Redondo Beach safe for the environment?
Yes. Only clean sand sediment will be deposited on the beach and offshore. All material has been sampled, reviewed, and approved for beach placement by regulatory agencies: the U.S. Environmental Protection Agency, The Corps, the California Coastal Commission, and the California Regional Water Quality Control Board. Members of the regional Contaminated Sediments Task Force (EPA, Coastal Commission, Regional Water Quality Control Board, the California Department of Fish and Game, Heal the Bay and other environmental groups) have reviewed the test results and concur that the sediments are safe for placement on the beach and offshore. The sand deposited on the beach may appear darker than the other sand at first. That is because it has been under water for some time. An odor also may at times be associated with the wet sand. The dredged sand will quickly dry and become indistinguishable from the other beach sand.
- How is the dredged sand deposited offshore at Redondo Beach, and what will the onshore placement involve at Redondo Beach?
With the offshore sand placement at Redondo Beach, the dredged sand is transported by a scow – a large flat-bottomed vessel – and is dropped through an opening at the bottom of the scow into water 30 to 50 feet in depth at Redondo Beach. The sand placed offshore will be deposited in an existing underwater pit located 500 yards from shore for use in future beach nourishment efforts. The offshore sand deposits will be made twice a day and take about a half-hour to complete.
Sand placed directly onshore at Redondo Beach will be pumped from a barge anchored about 1,000 feet offshore through a plastic pipe running along the sea bottom from the barge to the beach. The onshore beach nourishment project will take place over 40 days beginning in August 2012. The clean sediment will flow slowly but continuously from the mouth of the pipe, which measures 16 inches in diameter, at a rate of about 2,000 cubic yards a day — the equivalent of 200 dump truck loads per day. During daytime hours, a bulldozer will be used intermittently to evenly distribute the sand on the beach. The pipe will be moved regularly to allow sand to be pumped onto different sections of the beach between Ruby Street and the Topaz jetty. Temporary fencing around the pipe will cordon off small sections of the beach while the sand is pumped in those areas.
- Is there a hotline I can call if I have questions or concerns about the project?
Trish Pietrzak, Public Relations Specialist for the City of Redondo Beach, 310-995-9800, firstname.lastname@example.org
Additional Contact Info: USACE Public Affairs Specialist: Greg Fuderer (213) 479-8698/email: email@example.com