20A - AA- EMERGENCY REPAIRS - Laserfiche WebLink

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CITY OF SANTA ANA CONSTRUCTION CONTRACT PROJECT NO. 17 -6612 URGENT REPAIRS - VARIOUS LOCATIONS EXHIBIT A PROPOSAL SCOPE OF SERVICES AND COMPENSATION SCHEDULE SHALL BE BASED ON A TIME AND MATERIAL FORCE ACCOUNT BASIS AS SPECIFIED IN THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION. The urgent repairs shall be completed by performing the work on a design -build basis limited to time and material pricing, using acceptable methods and equipment approved by the City. Costs shall be calculated based on actual costs and quantities of materials used by the contractor at standard materials pricing, and actual man-hours worked at standard prevailing wage rates. Staff shall verify and confirm accounting of materials and labor consumed to monitor progress and billing. THE WORK SHALL TAKE PLACE AT THE FOLLOWING FOUR CITY -OWNED FACILITIES LOCATIONS: 1) The first urgent repair is the safety barrier located on the second floor of the Third & Birch Parking Structure (Exhibit 1). The barrier was shattered by a vehicle that nearly drove through it and off of the second floor of the parking structure. This incident occurred in December 2016 by an individual driving while intoxicated. Immediately after the damage occurred, staff engaged a structural engineer to determine if there was imminent danger and to make the area temporarily safe. The total expected construction cost for this location is not expected to exceed $100,000. 2) The second urgent repair is to the First Street Bridge over the Santa Ana River (Exhibit 2). A fire that was allegedly caused by transients living at the southwest bank of the river resulted in structural damage to the underside of the bridge. A structural engineer was immediately engaged to assess the damage and make the area temporarily safe. The bridge repairs require structural engineering inspection and oversight before resuming full regular use. The cost to repair the bridge and provide structural engineering is not expected to exceed $50,000. 3) The third location is a partial collapse of the Safety Wall between the railroad tracks and adjacent residential properties near the intersection of Lincoln Avenue and Beachwood Street (Exhibit 3). The recent rain activity weakened the wall footings which resulted in the wall's partial collapse. Staff has already provided temporary measures to make the area safe. The permanent repairs will be coordinated with the Southern California Regional Rail Authority ( SCRRA - rail road operator) due to the close proximity to the railroad tracks. SCRRA may require additional engineering and repairs to an adjacent four foot wide drainage channel. Staff will assess the drainage issues and report them back separately. The cost to rebuild the safety walls is not expected to exceed $40,000. 4) The fourth location Is a drainage channel which runs east west parallel to and south of First Street. The mobile home park located at 4080 west First Street drains to the rear and into the subject channel. The channel walls are collapsing and the adjacent mobile homes are in danger of becoming undermined by a sinkhole that has developed (Exhibit 4), Staff recommends the voids filled with slurry cement material followed by structural concrete slab replacements at a cost not to exceed $30,000, Long term channel rehabilitation will be necessary, and staff will be engaging a consultant to perform a detailed analysis for permanent repairs. 20A -16