Site work and paving for a civil project in Merced, California. Completed plans call for site work for a bridge / tunnel; for paving for a bridge / tunnel; road / highway; and bridge / tunnel.

General work description: Replace the existing bridge with a precast prestressed concrete voided slab bridge, replace approximately 400-feet of Arroya Avenue with Class 2 aggregate base and hot mix asphalt, rock slope protection and steel pipe pile retaining wall. You must perform, place, construct, or install other items and details not mentioned that are required of the plans under the Standard Specifications and special provisions. The County will receive sealed bids for the ARROYA AVENUE OVER DELTA CANAL BRIDGE REPLACEMENT PROJECT. Bid forms for this work are included in a separate book titled: COUNTY OF MERCED STATE OF CALIFORNIA DEPARTMENT OF PUBLIC WORKS BID BOOK FOR ARROYA AVENUE OVER DELTA CANAL BRIDGE REPLACEMENT PROJECT The Contractor must have either a Class A license or a combination of class C licenses that make up a majority of the work. The successful bidder will be required to obtain a Merced County Business License before execution of the contract at his own expense. Note: Precast Prestressed Shop Drawings and Erection Work Plan Must Be Submitted by September 1st 2025. No contractor or subcontractor may be listed on a bid proposal for a public works project unless registered with the Department of Industrial Relations pursuant to Labor Code section 1725.5. For the federal training program, the number of trainees or apprentices is 0. Bids must be on a unit price basis. All bids are to be compared on the basis of the COUNTY OF MERCED'S estimated quantities of work to be done. Question Deadline 07/03/2025 Questions about alleged patent ambiguity of the plans, specifications, or estimate must be submitted in writing at least four (7) days before bid opening. After this time, the County will not consider these questions as bid protests. Present bidders' inquires in writing via email to Al Buenrostro, Supervising Engineer at the County of Merced - Department of Public Works, 345 West 7th Street, Building A, Merced, CA 95341-6685; email: ABuenrostro@countyofmerced.com. The County of Merced (County) proposes to replace the Arroya Avenue structure (Bridge No. 39C-0275) over Delta Canal, located approximately 0.9 mile north of State Route 152, near the community of Dos Palos in Merced County. The County proposes to replace the existing single-lane structure with a two-lane bridge to accommodate existing and future traffic volumes. In addition, the existing bridge would be lengthened to correct a hydrologic restriction. The County of Merced (County) proposes to replace the Arroya Avenue Bridge (Bridge No. 39C0275) over Delta Canal (project). The existing bridge is approximately 0.9 mile north of State Route 152 (SR 152), near the community of Dos Palos in Merced County, California (project area) (see Figure 1). The existing bridge is a single-lane, three-span reinforced concrete T-beam structure built in 1930. The bridge does not meet current design standards for travel width and shoulders, and currently has no barrier rails. The bridge is too narrow for the current ADT and is heavily used by agricultural vehicles, resulting in unsafe driving conditions. The existing bridge is rated Functionally Obsolete and does not adequately handle the current average daily traffic (ADT). The County proposes to replace the existing single-lane structure with a two-lane bridge to accommodate existing and future traffic volumes. In addition, the existing bridge would be lengthened to correct a hydrologic restriction. The new bridge would also include barrier rails to prevent vehicles from leaving the bridge and entering the canal. The Project would include replacing the existing single-lane bridge with a 2-lane bridge that is wider and longer than the existing bridge and would include barrier rails. The new bridge would be a single span cast-in-place precast, pre-stressed concrete slab bridge and would measure 31 feet, six inches wide and 50 feet long and would span the canal. Removal of the existing bridge would include the partial removal of the existing abutments at each side of the canal. Because the existing weir structure is attached to the existing bridge, portions of the existing abutment would need to remain in place to support the weir structure. New abutments would be constructed as 24-inch cast-in-drilled-hole (CIDH) concrete pile. Temporary shoring (sheet piling) may need to be installed around the proposed construction. Temporary sheet piles could either be vibrated or pushed into place. The piles would retain a maximum of seven feet of fill and be driven approximately 15 feet deep. With the proposed shoring strategy, water in the canal would be largely unimpeded from free flow conditions. Due to the irrigation demands and requirements to provide water to properties year-round, a diversion would not be installed. No other restriction to the flows are anticipated other than the temporary shoring. In addition, the channel is armored with 12 inches of existing rock slope protection (RSP). Additional RSP would be minimal and includes a 2-foot-thick Class Ill (Method B) RSP layer placed in front of the abutment. The weir structure located to the south would not be modified by the construction of the new bridge. The bridge approaches would be raised approximately six inches to meet the hydraulic requirements of the SLCA. Per the SLCA, the new bridge soffit elevation must match the existing soffit elevation. The roadway approaches would be approximately 157 feet to the east and 163 feet to the south and would be widened to meet the new bridge width. In addition, the Project would include realignment of the levee access roads at three of the four quadrants to allow SLCA access for canal maintenance. The structure would have low profile bridge railings with modified end treatments to limit the realignment on to the access roads. Access to the levee roads must be preserved for maintenance of the canal and access for the SLCA/Henry Miller Reclamation District. The Project involves activities related to the demolition of the existing Arroya Avenue Bridge (Bridge No. 39C-0275) over the Delta Canal ("stream") and replacement with a two-lane bridge structure to provide improved safety and operations. Project activity will occur within one five-month work season that is anticipated to begin in November and be completed the following April. If water is present within the channel, water will be diverted using steel sheet piles installed along the toe of the banks prior to the start of work. The sheet piles will be vibrated into place from the shore approximately 15 feet deep. If ponded or nuisance water occurs in any work areas, the work areas will be pumped dry with a portable pump. Dewatering of the site will use sedimentation tanks allowing disturbed solids to settle out before the water is pumped over the exclusion barriers and back into the stream. Removal of the existing bridge will include the partial removal of the existing abutments and complete removal of the existing bridge superstructure. Deck sections will be lifted out for disposal using excavators or cranes. Hammer drills, concrete hole saws, and other power and hand tools will be used in the removal process. The existing abutments will be saw cut below the superstructure. Northern wingwalls will be sawcut from the abutments and removed. Existing columns will be removed to the top of the invert slab. Chain link mats, tarps, and other methods will be used to catch debris during removal. The new bridge will be approximately 50 feet long and 32 feet wide. Abutments for the new bridge will be supported on cast-in-drilled-hole piles. There will be four 24-inch diameter and 59.4-foot long cast-in-drilled-hole piles per abutment. Two permanent steel sheet pile retaining walls will be installed by vibratory hammer at the northern end of each abutment, measuring 20 feet long and 10.3 feet long. Two-foot deep Class III rock slope protection will be placed in front of each new abutment. The deck design is a two-span concrete cast precast/prestressed voided slab. Cranes will place slab units then pour and cure deck and concrete barriers. The bridge approaches will be raised approximately six inches and widened to meet the new bridge width. The Project will require approximately 221 cubic yards of concrete for construction of the abutments and 755 cubic yards of rock slope protection. Approximately 100 cubic yards of imported fill, 420 cubic yards of aggregate base, and 35 tons of hot mix asphalt will be used to raise the bridge approaches. After construction of the new bridge, all debris, and components of the temporary water diversion will be removed and disposed of. The disturbed stream bed and banks will be contoured to conform with the bed and banks upstream and downstream of the Project area and seeding of exposed slopes to minimize Project-related erosion of the stream banks. Project equipment staging will occur on the existing right-of-way for Arroya Avenue. Equipment required to complete the Project include excavators, dozers, dump trucks, concrete trucks, drill rigs, concrete pumps, heavy- and light-duty haul trucks, water trucks, cranes, pile driving machinery, asphalt and metal cutting equipment, backhoes, loaders, compactors, gas powered generators, welding equipment, compactor, roller, scraper, boom lift, mowers, sandblaster, trencher, forklift, bulldozer, asphalt paver, and front-end loaders. A. Describe the project in detail. Include photographs of the project location and immediate surrounding area. - Written description of all project activities with detailed step-by-step description of project implementation. - Include any structures (e.g., rip-rap, culverts) that will be placed or modified in or near the stream, river, or lake, and any channel clearing. - Specify volume, and dimensions of all materials and features (e.g., rip rap fields) that will be used or installed. - If water will be diverted or drafted, specify the purpose or use and include Attachment C. - Enclose diagrams, drawings, design plans, construction specifications, and maps that provide all of the following: site specific construction details; dimensions of each structure and/or extent of each activity in the bed, channel, bank or floodplain; overview of the entire project area (i.e., "bird's-eye view") showing the location of each structure and/or activity, significant area features, stockpile areas, areas of temporary disturbance, and where the equipment/machinery will access the project area. The project site is about 8 miles east of Los Banos, California. The bridge location is on Arroya Avenue where it intersects Delta Canal. Site coordinates are approximately 37.06662204N latitude and 120.67271233 W longitude. We show the vicinity map as Figure 1 in Appendix I. All elevations in this report are based on the NAVD 1988 vertical datum. The project datum is based on Control Points CP-1 as shown on the "Foundation Plan" provided by Consor. The proposed replacement structure is shown on the "General Plan" provided by Consor to be a pre-cast, pre-stressed concrete voided slab bridge. The new bridge will be about 53 ft long and about 32 ft wide. The proposed bridge is shown north of the existing alignment with new deck grade at about elev. 108, approximately 2 ft above the existing bridge deck grade. New abutments will be parallel with the canal with steel sheet piles extending north of the pile caps to help support the existing embankments. The tops of the existing bridge abutments are planned to be cut off with the remainder of abutments, left in-place and connected to the new abutments with steel non-tensioned tie-rods. New approach roadway improvements will also be completed as part of the project on each end of the proposed bridge. New/widened roadway sections will be raised to accommodate increased bridge deck grade. No channel modifications have been indicated for this project. Including any data system whose only function is to transmit or receive information; excluding all other data systems or multiple systems which include control function or power supply; inclusion or exclusion of terminations and testings of conductors determined by their function; excluding fire alarm work when installed in raceways (including wire and cable pulling) and when performed on new or major remodel building projects or jobs for which the conductors for the fire alarm system are installed in conduit; excluding installation of raceway systems, line voltage work, industrial work, life-safety systems (all buildings having floors located more than 75' above the lowest floor level having building access); excluding energy management systems Includes the installation testing, service and maintenance, of the following systems which utilize the transmission and/or transference of voice, sound, vision and digital for commercial, education, security and entertainment purposes for the following: TV monitoring and surveillance, background-foreground music, intercom and telephone interconnect, inventory control systems, microwave transmission, multi-media, multiplex, nurse call system, radio page, school intercom and sound, burglar alarms, and low voltage master clock syystem. Including any data system whose only function is to transmit or receive information; excluding all other data systems or multiple systems which include control function or power supply; inclusion or exclusion of terminations and testings of conductors determined by their function; excluding fire alarm work when installed in raceways (including wire and cable pulling) and when performed on new or major remodel building projects or jobs for which the conductors for the fire alarm system are installed in conduit; excluding installation of raceway systems, line voltage work, industrial work, life-safety systems (all buildings having floors located more than 75' above the lowest floor level having building access) excluding energy management systems.