AMENDMENT NO. 1 TO THE PUBLIC WORKS AGREEMENT WITH CT&T CONCRETE PAVING FOR CONSTRUCTION SERVICES RELATED TO THE GOLDEN AVENUE BRIDGE REPLACEMENT PROJECT

On November 18, 2025, City Council awarded a construction contract to CT&T Concrete Paving (CT&T) in the amount of $4,687,010.50 for the reconstruction of the Golden Avenue Bridge. The bridge is located along Golden Avenue, West of Imperial Highway and East of Valencia Avenue. The total project cost was $6,037,599.55 which funded the construction, contingency, construction management and inspection, and construction engineering support from the design firm. The cost breakdown consists of $2,647,046 of Federal Highway Bridge Program funds, $2,200,000 of Community Project Funding/Congressionally Directed Spending, $215,682 of County of Orange contribution for OC Loop D construction, and $974,871.55 of Measure U funds.

The project has encountered extra work, a majority of which has been caused by utility work outside of the contractor's direct scope of work. While a majority of the utility providers were able to complete their work within the provided construction windows and cover their own costs, Southern California Edison (SCE) was not. Staff determined that the undergrounding work is essential to the overall scope of work for the project. Proceeding with this work satisfies previous agreements entered into between the City and the Brandywine community which obligated $500,000 of funds to this project for the utility relocation work to be completed.

To avoid the potential delay in coordinating with SCE forces, the City directed CT&T to pick up the undergrounding scope in an effort to recover as much of the original schedule as possible and save construction costs. The additional utility work on behalf of the contractor resulted in an additional three months of contract time to the originally anticipated six-months and an additional cost of $488,333.30. Approving this amendment will ensure that the work continues and the best finished product is delivered to the community.

Other less costly extra work items include the installation of two pedestrian push buttons at the signalized bike trail crossing, the redesign of a stormwater catch basin that encountered an unexpected utility line conflict, a reinforcement placement conflict between the bridge barrier and post pockets, and the removal of portions of conflicting sheet piles from the bike lane project. These other work items total $40,172.57. Between the previously mentioned utility work of $488,333.30 and the $40,172.57 of other work items, the proposed increased amount to the contract is $528,505.87.

Staff requests City Council approve Amendment No.1 to the contract with CT&T increasing the original contract amount by $528,505.87 to provide compensation for the above mentioned work while also requesting additional contingency in the amount of $51,494.13 to cover any additional unforeseen costs that may occur during the remainder of construction. This total increase of $528,505.87 plus $51,494.13 as contingency will result in a total not-to-exceed contract amount of $5,267,010.50. A reminder that the Brandywine agreement will provide $500,000 worth of funding for the utility relocation work.

It is recommended that the City Council:

1. Approve Amendment No. 1 to a Public Works Agreement with CT&T Concrete Paving for an additional $528,505.87, for an updated contract amount of $5,215,516.37; and
2. Authorize the Acting City Administrator or her designee to approve contract change orders up to 10%, or $51,494.13, of the Amendment amount for a not-to-exceed amount of $5,267,010.50; and
3. Authorize the Acting City Administrator and/or her designee to execute the necessary documents, in a form approved by the City Attorney.

This item conforms to Strategic Goal No. 3: Infrastructure, Facilities & Public Spaces: Maintain and enhance streets, parks, and public facilities to ensure they are well-appointed, clean, attractive, and reflective of the City's commitment to quality.

The City of Placentia has budgeted in its Capital Improvement Program to replace the Golden Avenue Bridge and the related portion of the OC Bikeway Loop Segment D. The bridge is located along Golden Avenue west of Imperial Highway and East of Valencia Avenue. Golden Avenue is a regionally significant collector roadway, providing east-west travel between the cities of Placentia and Yorba Linda. The bridge was built in 1934 to span the Carbon Canyon Channel and was rated functionally obsolete in 2005 by Caltrans.

The existing bridge was an earth-filled reinforced concrete arch bridge supported on spread footings. The bridge was 34 feet long and 27 feet wide and carried two lanes of traffic over the channel. There were no sidewalks or bicycle lanes on the bridge resulting in potential conflicts between pedestrians, bicyclists, and motorists.

The proposed bridge will be a 60-foot-4-inch wide structure designed to improve safety, mobility, and connectivity. The bridge will provide two 12-foot-wide travel lanes and 6-foot-wide sidewalks on both the south and north sides of the structure. The superstructure will consist of PC/PS CA I54 girders and will incorporate a Type 732SW (Modified) barrier to meet current safety standards. It is also designed to accommodate six telecommunications conduits, a 4-inch So Cal Gas line, six conduits for Southern California Edison (SCE), and a 16-inch casing for a future Yorba Linda Water District waterline. The substructure will be composed of abutments with a thickness of 3.5 feet, supported on 2.5 feet CIDH piles. In addition, the project will also complete 800 feet of Orange County Public Works' bike/pedestrian trail project, OC Loop Segment D, from Station 21+00 to 29+00, which runs directly under the bridge, providing a link for regional trail connectivity.

On November 18, 2025, City Council awarded a construction contract to CT&T in the amount of $4,687,010.50 for the reconstruction of the Golden Avenue Bridge. The total project cost was $6,037,599.55 which funded the construction, contingency, construction management and inspection, and construction engineering support from the design firm. The cost breakdown consists of $2,647,046 of Federal Highway Bridge Program funds, $2,200,000 of Community Project Funding/Congressionally Directed Spending, $215,682 of County of Orange contribution for OC Loop D construction, and $974,871.55 of Measure U funds.

The project has encountered significant extra work due to utility construction outside of the contractor's direct scope of work. Eleven separate utility providers are affected by the reconstruction of the bridge. All these providers were notified during the design phase regarding upcoming work to ensure the design plans were consistent with their requirements. During this time, scopes and responsibilities were also assigned regarding who would be responsible for each relocation effort. Once construction began, a construction window was provided to the separate utility agencies during which they would be provided access to the job site by the City's contractor to perform their required work. Costs were also requested and agreed to. While a majority of the utility providers were able to meet their provided construction windows and cover their respective construction costs, Southern California Edison (SCE) was not. SCE provided an updated cost for them to perform their work weeks before the anticipated work was scheduled to begin. The amount provided was well above what had previously been provided to the City. This required the City to reevaluate the priority of SCE's undergrounding work and coordinate with the City contractor, CT&T, to see if the scope could be covered by them. Staff determined that the undergrounding work is essential to the overall scope of work for the project. Proceeding with this work satisfies previous agreements entered into between the City and the Brandywine community which obligated $500,000 of funds to this project for the utility relocation work to be completed.

To avoid the potential delay in coordinating with SCE forces, the City directed CT&T to pick up the undergrounding scope in an effort to recover as much of the original schedule as possible and save construction costs. The work includes trench excavation, installation of approximately 570 linear feet of 5-inch Schedule 40 PVC conduit at a minimum depth of 30 inches with slurry encasement, installation of one 71-inch × 48-inch precast pull vault, trench backfill, compaction, pavement restoration, and all labor, materials, equipment, traffic control, and incidental work necessary to complete the installation. The conduit extends beyond the Beginning of Bridge (BB) and End of Bridge (EB) bridge approaches to connect with the existing SCE facilities.

The additional utility work on behalf of the contractor resulted in an additional three months of contract time to the originally anticipated six-months and an additional cost of $488,333.30. Approving this amendment will ensure that the work continues and the best finished product is delivered to the community.

This change order includes four additional less costly extra work items:

Overtime work performed by the Construction Management consultant to support bridge construction activities, including completion of bridge deck reinforcement, deck formwork, deck drain installation, Bid-Well screed setup, final deck preparation, placement of burlap, and concrete curing following the bridge deck concrete placement. Overtime work also included inspection services during extended work hours, installation and welding of the 16-inch-diameter casing for the Yorba Linda Water District waterline, installation of the deck drain casing, and soil compaction behind the bridge backwall. The Contractor has agreed to provide a credit to the City for the Construction Management overtime costs associated with these operations. The overtime work was necessary to complete critical bridge construction activities and associated inspection services performed outside of normal working hours to maintain the project schedule. The removal of a portion of the existing RW2A sheet pile wall, originally installed as part of the Orange County Bikeway Loop Segment D Project, due to a conflict with the proposed north wingwall at Abutment 1 of the Golden Avenue Bridge Replacement Project. The Contractor was required to torch-cut and remove a 45-inch by 10-inch portion of the existing RW2A sheet pile wall that conflicted with the proposed wingwall to allow construction in accordance with the design. The conflict was not identified in the contract plans. This work was performed on a Time and Materials (T&M) basis as directed by the Engineer. The cost for this work, including the aforementioned credit came to $6,817.06.

The installation of the pedestrian push button reinstallation and relocation associated with the Golden Avenue Bridge Replacement Project. The work includes relocating and reinstalling two pedestrian push buttons, foundations and incidental work necessary to complete the installation. The removal and subsequent resetting of the pedestrian push buttons were required to accommodate bridge construction. While the bridge plans referenced the OC Loop plans for the final placement of the push buttons, the OC Loop plans did not identify the final placement locations of the pedestrian push buttons. Once the locations were determined, the City directed CT&T to perform the relocation work to avoid schedule impacts. The cost of this work came to $10,703.40.

During excavation for a proposed catch basin, CT&T encountered an unforeseen existing electrical line serving the light pole located at the corner of the OCPW service driveway on the southeast side of the bridge. To resolve this conflict, the designer developed an alternative design through RFI 33, utilizing a different OCPW standard catch basin configuration to avoid the existing electrical line. The cost for this item came to $17,506.75.

During installation of the bridge barrier post pockets, CT&T identified a conflict between the contract plans and the bridge barrier reinforcing steel layout. The contract plans require a 6-inch by 6-inch post pocket within the bridge barrier; however, the specified reinforcing steel configuration interfered with installation of the post pockets. The Designer revised the reinforcing steel configuration to accommodate the required 6-inch by 6-inch post pockets. The cost for this extra work came to $5,145.36.

Staff requests City Council approve Amendment No.1 to the contract with CT&T increasing the original contract amount by $528,505.87 to provide compensation for the above-mentioned work. This item also requests an estimated 10% contingency amount, or $51,494.13, based on the Amendment No. 1 increase. If this item is approved, the updated contract not-to-exceed the amount would be $5,267,010.50 to cover any additional unforeseen costs that may occur during the remainder of construction.

The requested Amendment No. 1 will increase the construction cost of the Golden Avenue Bridge Replacement project by $528,505.87. If Amendment No. 1 is approved, an additional expense of $111,298.95 will be incurred. This is because the original contract contingency was used, and if this item is approved, an estimated $580,000 will be granted ($528,505.87 Amendment No. 1 increase plus $51,494.13 about 10% contingency from this item's recommendation).

If approved, the new contract not-to-exceed amount will be $5,267,010.50. The revised total project cost for the Golden Avenue Bridge Replacement Project would amount to $6,487,172.50. This cost consists of a revised construction contract cost of $5,215,516.37 with CT&T, an updated construction contingency of $51,494.13, construction management and inspection services with T.Y. Lin in the amount of $1,015,939, and construction engineering support services with BCA in the amount of $204,223. 

Funding for this project is supported by numerous sources as outlined below: