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2002-24797 Reso RESOLUTION NO. 2002-24797 A RESOLUTION OF THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH, FLORIDA, AUTHORIZING THE APPROPRIATION OF FUNDS IN THE AMOUNT OF $650,000 FOR THE REPLACEMENT OF EXISTING HANGERS SUPPORTING A 20-INCH WATER MAIN AT THE SOUTH SIDE OF THE EAST MACARTHUR CAUSEWAY BRIDGE, REQUIRED AS A RESULT OF EMERGENCY BRIDGE REHABILITATION WORK TO BE CONSTRUCTED BY THE STATE OF FLORIDA DEPARTMENT OF TRANSPORTATION; SAID FUNDS TO BE OBTAINED FROM FUND 425, WATER AND SEWER RETAINED EARNINGS. WHEREAS, the Florida Department of Transportation (FDOT) will be repairing the East Mac Arthur Causeway bridge to take care of structural deficiencies and to add additional service years to its life; and WHEREAS, the repairs require jacking of the bridge deck and girders; and WHEREAS, the City has a 20 inch water main attached to the bridge deck system, which was constructed in 1957; and WHEREAS, the process of lifting the bridge deck will cause additional stresses in the water main hangers, which due to their corroded condition, may fail during this operation;and WHEREAS, it was evaluated that the replacement of the hangers, estimated at approximately $650,000, must be completed prior to FDOT's commencement of the bridge repairs; and WHEREAS, such funds for the replacement of hangers are available from Fund 425, Water & Sewer retained earnings. NOW, THEREFORE, BE IT DULY RESOLVED BY THE MAYOR AND CI'IY COMMISSION OF THE CIlY OF MIAMI BEACH, FLORIDA, the authorization to appropriate funds in the amount of $650,000 for the replacement of existing hangers supporting a 20.inch water main at the south side of the East Mac Arthur Causeway bridge. ~~p~ CIlY CLERK APPROVED FORM a LANG BE a FOR EXECUTION PASSED and ADOPTED this 20th day of ATTEST: ~ !i.-a-or F:\WORK\$ALL\VGK\COMMEMO\MacArthurR ~ ... CITY OF MIAMI BEACH COMMISSION ITEM SUMMARY m ~ Condensed Title: A Resolution authorizing the appropriation of funds in the amount of $650,000 for the replacement of existing hangers supporting a 20-inch water main at the south side of the East Mac Arthur causeway bridge, Issue: Shall funds in the amount of $650,000 be appropriated from fund 425 for the replacement of the water main hangers on the east Mac Arthur Causeway bridge? Item Summary/Recommendation: The Florida Department of Transportation is planning an emergency bridge repair of the east Mac Arthur Causeway bridge. The repairs require jacking of the bridge deck system, which supports the City's 20" water main, The lifting of the bridge sections will cause higher than normal stresses on the water main hangers, which due to their corroded condition may fail during the bridge jacking operation, Structural failure of the support hangers will result in catastrophic collapse of the water main, therefore, the support hangers must be replaced prior to the start of the emergency bridge repairs. The Administration's recommendation is to appropriate funds in the amount of $650,000 from fund 425, water and sewer retained earnings. Advisory Board Recommendation: I Financial Information: Amount to be expended: ~ Finance Dept. Fund 425 Water & Sewer Retained Earnin s Source of Funds: F:\WORK\$ALLWGK\COMMEMO\CS- MacArthurWM.doc AGENDA ITEM DATE c.7V 3-Jo -02- CITY OF MIAMI BEACH CITY HALL 1700 CONVENTION CENTER DRIVE MIAMI BEACH, FLORIDA 33139 www.ci.miami-beach.f1.us m ~ COMMISSION MEMORANDUM From: Mayor David Dermer and Date: March 20, 2002 Members of the City Commission Jorge M. Gonzalez ~ ~J City Manager 0 ~ 0 A RESOLUTION OF THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH, FLORIDA, AUTHORIZING THE APPROPRIATION OF FUNDS IN THE AMOUNT OF $650,000 FOR THE REPLACEMENT OF EXISTING HANGERS SUPPORTING A 20-INCH WATER MAIN AT THE SOUTH SIDE OF THE EAST MACARTHUR CAUSEWAY BRIDGE, REQUIRED AS A RESULT OF EMERGENCY BRIDGE REHABILITATION WORK TO BE CONSTRUCTED BY THE STATE OF FLORIDA DEPARTMENT OF TRANSPORTATION; SAID FUNDS TO BE OBTAINED FROM FUND 425, WATER AND SEWER RETAINED EARNINGS. To: Subject: ADMINISTRATION RECOMMENDATION: Adopt the Resolution. MAL YSIS: The East Mac Arthur causeway bridge constructed in 1957, has a 20 inch water main running under the south side of the bridge and attached to it by metal hangers. The water main, which was also installed around 1957-58. is the main water supply to the South Beach area, In August of 2001, the Florida Department of Transportation (FOOT) contacted the City to inform us that an emergency bridge repair was needed to take care of structural deficiencies. The work includes the replacement of all the expansion joints and steel span bearings, and the repair of the bulkhead wall and fender system. The steel span bearings are located in between the deck girders and the support pier bents. To replace the steel span bearings, sections of the bridge will have to be jacked up at the supports. the old bearings taken out, and new ones installed in their place. The process of lifting the bridge deck will cause additional stresses in the water main hangers (see photograph below), which due to their corroded condition, may fail during the bridge jacking operation, Structural failure of the support hangers will result in catastrophic collapse of the water main. therefore, the support hangers must be replaced prior to the start of the emergency bridge repairs. The City has evaluated and prepared plans for the replacement of these water main hangers. The replacement of the hangers should be completed before the commencement of FOOT's project for the rehabilitation of the bridge. I ' which is scheduled to begin in late October 2002. Construction is expected to be completed within 4 to 5 months from then. The work for the replacement of the hangers may require minimal traffic interruption. with expected one-lane closures on the eastbound right lane, for short distances at the work zone. During FOOT's work in October/November, the replacement of the expansion joints will require closing two of the three existing lanes in each direction. The lane closures will only occur at night, thus, minimizing the effects on the traffic. In addition, the lane closures will not occur during the weekends during the heavy night traffic. Marine traffic is not anticipated to be affected by the repair work below the bridge, as well as the painting and replacement of the bearings. which will be performed from below the bridge. The contractor is required to maintain a minimum horizontal distance to allow for uninterrupted marine traffic. The replacement of the 20" water main hangers is estimated to cost between $500,000 to $650,000. The work will be performed by a contractor to be selected by competitive bidding process. Once the funds have been appropriated an invitation for bids will be issued for the installati n of water main hangers. South elevation of the East Mac Arthur bridge Side view of East Mac Arthur Causeway bridge. showing the 20" water main and hangers ; ~: ,'\i~':;'