01-27-2014 Council Packet - Laserfiche WebLink

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. - Mr. Jesse Struve, PE • � January 6, 2014 � Page 3 • Minimum input on design details and or products used by contractor. (Example: Two coat epoxy is minimum system allowed by AWWA. For a small increase, a three coat system can be applied to provide additional protection.) • Schedule per contractor • System designed to meet contract life Benefits-Drawbacks of DesiEn-Bid-Build Benefits • Lower compared cost(Example: $407,900 - 5 year cost including 2 year floatdown inspection, one power wash and cleanout, one visit for spot repairs—likely not required; $456,400- 10 year cost including two floatdown inspections, two power wash and cleanout, two visits for spot repairs—likely not required) • Project schedule predetermined • Only necessary work is completed • Specific design details and construction materials are specified so owner knows exactly what will be provided • Engineer provides inspection on the work as requested by the owner(Full Time vs. Part Time inspection) Drawbacks • Contractor unknown until after bids are opened • Owner may be required to contract for future wark(inspections, power washing, repairs, etc.) Cost Comparison Warranty Period SEH�DB Delivery Traditional DBB BMI Projected Savings Method Delivery Method 5 Year $466,700 $407,900 $58,800 10 Year $548.800 $456,400 �92,400 By using the traditional DBB method, the City can include a higher level of protection with a three coat epoxy system on the interior wet portion of the tank for cost savings of$58,800 for a 5 year warranty and $92,400 for a 10 year warranty. Conclusions and Recommendations � Based on the two delivery methods, we recommend the City complete the project using the traditional DBB method for the following reasons: 1. Value. By publicly bidding the work, competitive bidding is increased and the owner is afforded the market rate for the work. The same contractor that is proposing to do the work by the DB method can be awarded the work for a lower price because of more bidding competition. 2. Only complete work necessary. Inspections or repairs of the coating system are not needed per the frequency included in the SEH�DB proposal. Often, inspections are held at the two year warranty period and then every five years thereafter. Spot repairs can be completed at the five G:\Orono\010614 struvememo.dotx You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com)