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CB&I Coastal Planning & Engineering, Inc. 2481 NW Boca Raton Blvd. Boca Raton, FL 33431 Tel: +1 561 391 8102 Fax: +1 561 391 9116 www.CBI.com Mobilization/Demobilization GBC's mobilization/demobilization cost is $300,000. This is higher than CB&I's estimate of $110,000 and the average bid of approximately $181,000. However, the line item cost is not high enough to deem it to be over weighted as it is only 10% of the total project cost. This is not an unusual percentage for mobilization/demobilization effort_ JPDC's mobilization/demobilization cost of $18,000 is much lower. JPDC is based in Fort Pierce and thus a low mobilization/demobilization can be substantiated. Dune Fill Both GBC and JPDC propose to construct the project with 100% of the fill volume supplied by the Davis Mine. As of January 2014, the Davis Mine indicated that 15,000 cubic yards of processed sand had been stockpiled and an additional 70,000 cubic yards of in-situ material had been excavated for screening. While the current stockpile is insufficient to meet the project's fill volume requirements, it is anticipated that the lead time to be provided by the County between contract award and commencement of construction will be adequate to stockpile sufficient volumes of processed sand for the project. Exclusive use of this mine and current stockpile volume is not an immediate concern. GBC's cost to supply dune fill is $8.50/cy, which is similar to JPDC's cost of $9.00/cy. While these costs are lower than the average cost of the nine bids to supply dune fill ($11.23/cy), and lower than Co&I's estimate ($16.83/cy), the costs are in line with the price to purchase sand during the previous Sector 3 project. Thus, this price appears to be reasonable and achievable. GBC's cost to deliver dune fill was $4.00 per cubic yard plus an additional $4.00 per cubic yard to place it on the beach for a total of $8.00 per cubic yard. The CB&I's estimate was $7.43 per cubic yard to deliver and place dune fill. JPDC's cost to deliver and place dune fill was $11.00 per cubic yard, which was in line with the average bid of $12.13 per cubic yard. The cost to deliver and place dune fill is reasonable and in line with expectations. Turbidity Monitoring The project template is located above mean high water. Therefore, it is a reasonable assumption that turbidity monitoring will not be required if using an upland sand source. GBC's lump sum cost for turbidity monitoring of $10.00 appears to be based on the assumption that no turbidity monitoring will be required. While turbidity monitoring may not be necessary, clarification from FDEP should be sought. In the event that FDEP does require monitoring, the County will have limited monetary leverage to enforce permit compliance. JPDC's lump sum cost is $10,000, which is lower than the CB&I's estimate of $29,350 and the average bid of approximately $32,440. Assuming that turbidity monitoring is required at a cost close to CB&I's estimate, and GBC or JPDC successfully obtains a change order to perform this work, it would not affect the order of bid costs. Given that turbidity monitoring will likely not be required and that the low bid submitted for this line does not substantially impact the overall bid price, it is recommended that the County accept both bids as being responsive with respect to this line item. 45