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Feasibility Study Town of Palm Beach Reach 8 Beach Nourishment Town of Palm Beach Reach 8 Beach Nourishment

Aerial Photographs ( ) History

Reach 7 Beach Nourishment Nourished in early 2006 Serves as “feeder beach” to Reach 8 Approximately 1,095,600 CY Utilized offshore borrow areas Borrow material was finer than native beach sand Beach subjected to accelerated erosion and longshore transport

Reach 8 Masterplan Proposed Improvements

Material Summary Estimated Volume of Fill (North) = 143,000 CY o Maximum 60 CY/ft Estimated Volume of Fill (South) = 118,000 CY o Maximum 40 CY/ft Total Estimated Volume = 261,000 cubic yards Source: Ortona Sand Co, Inc., LaBelle, FL (~94 miles) Estimated Volume of Fill (North) = 143,000 CY o Maximum 60 CY/ft Estimated Volume of Fill (South) = 118,000 CY o Maximum 40 CY/ft Total Estimated Volume = 261,000 cubic yards Source: Ortona Sand Co, Inc., LaBelle, FL (~94 miles)

Methodology & Scheduling 2 Simultaneous offloading/placement operations 9am-5pm, Monday-Friday trips/truck/day/operation Est. Production = 3240 CY/day 216 Trucks/day, three bridges Est. Construction Time = 16 weeks for 261,000 CY 2 Simultaneous offloading/placement operations 9am-5pm, Monday-Friday trips/truck/day/operation Est. Production = 3240 CY/day 216 Trucks/day, three bridges Est. Construction Time = 16 weeks for 261,000 CY

Site Access & Staging Potential Access Locations Ambassador South I & II R.G. Kreusler Park Palm Beach Hampton Condominiums Thirty Two Hundred Condominiums Atriums of Palm Beach Condominiums I & II Lake Worth Bridge Southern Blvd. (3.7 miles) Ocean Ave (0.5 miles)

Preliminary Cost Estimation ItemQuantityUnit Unit Price Cost 1Supply Sand390,000Ton $ 9.78 $ 3,814,200 2Transport & Delivery (First Ton-Mile)390,000Ton-Mile $ 1.05 $ 409,500 3Transport & Delivery (Additional 93 miles)36,270,000Ton-Mile $ 0.16 $ 5,803,200 4Conveying of Material (Initial 300')390,000Tons $ 1.70 $ 663,000 5Conveying of Material (Extra 300')390,000Tons $ 1.11 $ 432,900 6Beach Place and Grade (<1000' from Access)322,500Ton $ 1.68 $ 541,800 7Beach Place and Grade (1000'-2000' from Access)67,500Ton $ 3.05 $ 205,875 8Maintenance of Traffic1LS $ 15, $ 15,000 9Pre/Post Construction Surveys1LS $ 40, $ 40,000 10Miscellaneous1LS $ 50, $ 50,000 TOTAL ESTIMATED COST: $ 12,000,000 Note: Assumption of 1 CY Sand is equal to 1 Ton

Performance Sediment Transport Rate Performance 30% greater w/ 0.6mm sand than use of 0.23 mm sand North fill performance approximately 6-8 years South fill performance approximately 5 years

Performance 25-Year Storm Event Profiles R-130 Monument

Impacts Hardbottom & ETOF - North

Impacts Hardbottom & ETOF - South

Permitting Permitting Issues Hardbottom impacts – 2.1 acres Mitigation location – north R-110 Sea turtle nesting season Sea turtle foraging habitat - hardbottom Acropora, survey for species and consult Cumulative impacts analysis for fill Permitting Issues Resolved Borrow area Compatibility of sand/fines Use of borrow area sand for non-critically eroded beach Substantial reduction in hardbottom impacts Processing and Mitigation Timeframe = months Est. Design & Permitting Fees = $300,000 Est. Monitoring Costs = $300,000/year Est. Mitigation Cost = $2,250,000

Conclusions & Recommendations Project is feasible Project would provide additional protection from 25-yr storm Project performance would be 5-8 yrs Project construction time ~ 4 months Project addresses petitioner’s concerns Based on reduced impacts and compatible sand Project is permittable Permitting time ~ months Maximum permittable project in foreseeable future Serve as an interim measure until Reach 7 renourishments stabilize Recommendation - Proceed with Truck Haul Renourishment

Next Steps Decision by Town Council to Proceed with Project JCP Coastal Systems full design and prepare JCP permit application Peer Review of JCP permit application and Approach

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