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EXHIBIT B - PAGE 2 b. Deleting the post tensioning will allow the bridge to be widened in the future much easier with the same type of superstructure construction c. Deleting the asphalt will eliminate future repairs and replacement of the asphalt on the bridge deck and a better joint system 5. We will change the design of the concrete sheeting behind the end bents to a steel sheet pile wall that was proposed on 431 Ave but was rejected for cost reasons. a. The reason for this change is the jetting of the concrete sheeting in the North relief canal would cause substantial water quality issues. Jetting is the only method that can be used to put in concrete sheeting. The steel sheets AZ12- 700 10' long can be driven behind the cap. The banks of the relief canal will be lined with concrete rubble to also protect from erosion. We will obtain the permit from the Indian River Farms Control District for these changes. These changes are consistent with other projects approved by the district. 6. We will design the bridge to the 2021 standards versus the 2015 standards it is presently designed under. 7. We will design the substructure caps and the bridge deck to be phased to allow for the maximum amount of bridge construction in the 1St phase of the project. This will allow just a small piece of the bridge to be constructed in the 21 phase of the project which will have the shortest construction time frame. 8. Cone & Graham would accept this as a lump sum contract and agree that no additional charges for this design change or quantity errors would be charged to the county based on this change. 9. We are proposing all these changes at a no cost change order to the county. We have a couple of options on how to facilitate this design change. 1. We can pay the engineer (WGI) for this Design build of the bridge a. IRC would have to cover the cost of the review of the design changes as we would have to submit the phasing plans for review under the original design. 2. IRC could deduct the cost of the redesign from WGI from our contract to reimburse WGI for their work. We would request a meeting as soon as possible to discuss these changes and the time to complete these changes in order to sequence construction. Sincerely, Randal Digitally signed by Randall Cropp Randy Cropp I C ro p p Date: 2021.06.03 Cone & Graham 08:15:08 04'00' East Coast Division Manager Cc: Bill Adams, P.E. Consor (wadams@consoreng.com) Kelly Cowger, P.E. Consor (kcowgeraconsoren .com) RE