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11.8.1. COUNTY ROAD 510 - FORCE MAIN INTERIM EMERGENCY REPAIR AND FOLLOW-UP CORRECTIVE ACTION - WABASSO CAUSEWAY - DERRICO CONSTRUCTION CORPORATION - MASTELLER & MOLER ENGINEERS - PROJECT US - 94 -22 -CS The Board reviewed a Memorandum of June 1, 1999: DATE: JUNE 1, 1999 TO: JAMES E. CHANDLER COUNTY ADMINISTRATOR FROM: DONALD R HUBBS, P.E. DIRECTOR OF UT 1, CES PREPARED STEVEN J. DOYLE, P.E. ' AND STAFFED CAPITAL PROJECTS MANAGER BY: SUBJECT: COUNTY ROAD 510 FORCE MAIN INTERIM EMERGENCY REPAIR AND FOLLOW-UP CORRECTIVE ACTION INDIAN RIVER COUNTY PROJECT NO. US -9422 -CS BACKGROUND On August 4, 1998, County staff discovered a failed pipe support bracket for a 124nch diameter force main suspended beneath the CR -510 bridge (Wabasso Causeway) where it crosses the Indian River. The 12 inch diameter force main had been design, permitted and inspected by Masteller & Moler Consulting Engineers in Association with KSM Engineering & Testing (Engineers). On August 10, 1998, Staff presented to the Indian River County Board of County Commission findings and courses of action to be taken to complete the repairs and modifications to the support system. The Board authorized the release of funds and Staff proceeded to complete the necessary temporary and permanent repairs / modifications to the pipe support system. ANALYSIS The Board authorized the Utility, pursuant to Agenda dated August 10, 1998 (copy attached) to proceed with the repair of the pipe support system and subsequently the Utility contracted with Derrico Construction Corp. and Metallurgical Testing Inc. to complete the repairs. The Metallurgist identified "metal fatigue" as the primary source of the failure. The Engineer; concluded that a cast -in-place concrete pipe support system was the most reliable fix and the Utility proceeded accordingly. The repairs / modifications to thepipe support system were completed in two steps. The first seep included the installation of additional support brackets, along time underside of the bridge. The second step included the installation of cast -m -place concrete thrust restrain at selected points on the pipeline. These steps were completed in August 1998 and in November 1998, respectively. The Engineers in cooperation with the County have agreed to pay for a portion of the construction and metallurgical testing services as a result of the required repairs and pipe support modifications. The Engineers have verbally agreed to reimburse the County for the interim repairs and permanent fix to the pipe support system as herein defined: Description Amount ($1 A. Emergency Repairs conducted by Derrico Construction Corp. $ 1,361.29 B. Metallurgical Analysis performed by Metallurgical Testing, Inc. $ 350.00 C. Metal Pipe Support Bracket fabrication by Murphy Industrial Fabricators, Inc. 675.00 Total (Sum of A. thin C.) $2,386.29 It has been recommended that the cost for the installation of the cast -in-place concrete thmst restraints be borne by the County since the County would have incurred that expense had the concrete thrust restraints been installed at the time the force main was initially installed. JUNE 19 1999 -29- 11 BOOK , `J rnu-L