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advise the COUNTY, if the balance of the work can be accomplished with the balance of the fee. If the work cannot be completed, the ENGINEER will notify the COUNTY, in writing, and make a request for a supplemental agreement. Cl. Geotechnical Investigations AS DIRECTED BY INDIAN RIVER COUNTY, THE COUNTY WILL PROVIDE THE ENGINEER WITH THE BELOW DESCRIBED SERVICES AS STIPULATED TO COMPLETE THIS PORTION OF WORK FOR THE HEREIN DESCRIBED PROJECT. The ENGINEER has received the Soils Conditions Survey for the project. In and along the corridor, the Geotechnical Consultant identified muck/organic deposits. Due to these existing conditions, additional borings will be required for, and to delineate: muck/organic deposits; plastic soils, and other deleterious subsurface, particularly in fill -conditions in existing ditches/canals. In addition, additional geotechnical investigations are required to determine potential slope instabilities in step cut areas, particularly adjacent to the Red Stick property. D. Roadway Design/Plans 13. The ENGINEER shall modify the plans, as requested by the COUNTY, to provide a 4 -lane roadway to 2 -lane roadway transition, at the project termini. This supplemental agreement (Number 4) addresses the need to add back to the Hourly Rate Component, the $7,500.00 estimate, as approved in Supplemental Agreement No. 2. This was due to the funds being utilized, as decided by the COUNTY, for evaluation of impacts on a realignment of SR -510, east of US -1, to avoid further and specific property impacts. 14. The ENGINEER shall modify the plans, as requested by the COUNTY, to address supplemental storm water design. The project storm water design and plans preparation was advanced following the receipt of review comments from the COUNTY on the Pre -60% Plans. The ENGINEER and the COUNTY agreed upon specific aspects of the work, such as follows: • The western project limits up to and including the Red Stick property. It was approved that the location of Retention Pond 1, on the Gordon Property would be developed, and stormwater run-off would also be collected east of 58`s Avenue and would connect to the Red Stick existing pond system. Several alternatives were presented and coordinated with the Red Stick owner. It is assumed that the Red Stick property existing drainage system, and any permit modifications required for the CR -510 project will be included with this supplemental agreement (Number 4). The ENGINEER has evaluated the existing Red Stick permit, and several scenarios to route and convey the project drainage. There are currently six (6) drainage 0