County of Orange Dana Point Harbor Baby Beach Pilot Circulation Project Vincent Gin, P'E'

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County of Orange Dana Point HarborBaby Beach
Pilot Circulation ProjectVincent Gin, P.E.

• CBI Enclosed Beach Symposium - August 17, 2005

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Dana Point Harbor
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Previous CBI Phase I Studies

• State of the Beach Report
• Bacteriological Special Studies Report
• Circulation Study Report
• Data Mining Report
• Speciation Study (more from Donna)

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Clean Beaches Initiative

• Limited circulation identified
• No funding for circulation
• Urban runoff diversion funded

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Three Month Pilot Project

• Cooperative Project with City WTS
• Six Oloid Circulation Devices
• Everest International Consultants
• Dye Tracer Test
• Bacteria Monitoring Program
• PROJECT OBJECTIVE
• Can Oloids effect enclosed beach water quality
  and if so, by how much?

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Oloids with floats Cages
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Oloid in a Cage
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The Barge
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Oloid lowered into water
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Oloids Installed
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Baby Beach
Swimming Area
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AB411 Monitoring

• 4 Locations on Baby Beach
• 2 Locations at pier and east dock
• Sampled once per week

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Pilot Monitoring Program

• Same locations as AB411 program
• Six locations sampled twice per day, 5 days per
  week
• 10-fold increase in sampling over AB411 program

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Preliminary Data
Preliminary Data
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Preliminary Data
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Next Steps

• Two-day Dye Tracer Test
• Evaluate Pilot Project Results
• CBI Phase II grant application for permanent
  installation
• Investigate Other Options

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(No Transcript)
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Summary

• 10-fold increase in sampling over AB411
• Numerous variables including tide cycle influence
• Promising trend
• More data needed to increase confidence