(16)AR 082107 Harris Construction

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ITEM #16 CITY OF COLTON AGENDA REPORT FOR THE CITY COUNCIL MEETING OF AUGUST 21, 2007 TO: FROM: SUBJECT: DATE: BACKGROUND: HONORABLE MAYOR AND CITY COUNCIL MEMBERS AMER JAKHER, P.E., PW DIRECTOR / CITY ENGINEER APPROVE A RESOLUTION INCREASING THE 2007/2008 CAPITAL IMPROVEMENT PROGRAM BUDGET IN THE AMOUNT OF $60,000; AUTHORIZE AWARD OF CONSTRUCTION ENGINEERING. $58,172.20. JULY 30, 2007 AN AMENDMENT TO HARRIS INC. IN THE AMOUNT OF On Sunday, April 22, 2007, two medical center employees were injured when a sink hole gave way as they were accessing the entrance way to the Arrowhead Regional Medical Center. While the medical center lies within the City of Colton, the incident occurred along an access road on the medical center property and not a City of Colton street. The cause of this incident was the failure of the regional storm drainage infrastructure located on the Arrowhead Medical Center property. The same design and materials were utilized in the construction of the storm drainage infrastructure located at Meridian Avenue approaching Valley Boulevard. To ensure that a similar circumstance did not recur along city streets staff authorized Harris Construction, the lowest bidder for the 3-5 Comprehensive Storm Drain Project Phase III, to excavate and determine the condition of the Meridian Avenue storm drain; this infrastructure is a part of the 3- 5 Storm Drain Plan. ANALYSIS/DISCUSSION: On June 6, 2006, Council awarded a construction agreement to Harris Construction Engineering for the 3-5 Comprehensive Storm Drain Project. This agreement was amended to include three change orders to adjust for unanticipated soil conditions experienced during the construction phase; total compensation reflected by agreement was $3,045,997.74. Staff instructed Harris Construction to establish if a similar fault existed in the storm drainage infrastructure located along Meridian Avenue as that found to exist in the infrastructure which failed on the hospital property. The contractor informed staff that the bulkhead for the storm drain located along Meridian Avenue, designed like the one which caused the sinkhole, were both constructed with wood. As the sinkhole was a result of the wooden bulkhead having rotted away, staff advised the contractor to move forward and correct the design of the Meridian Avenue storm drainage infrastructure.