Caltrans District 7 On-Call Contracts

As one of the most heavily traveled regions in the state, Caltrans District 7’s highways require a significant amount of maintenance and upkeep. Advanced Civil Technologies is delivering task orders to preserve the safety and quality of the region’s many routes.

Presiding over the counties of Los Angeles and Ventura, Caltrans District 7 encompasses one of the most populous areas in the country. The District’s vast highway network experiences heavy travel, as it is used by millions of commuters daily. Additionally, Los Angeles’ port cities introduce a high volume of commercial traffic that utilizes routes such as I-5 and I-10 to access other parts of the state or country. As a result of this impressive traffic index, these highways require regular upkeep. Advanced Civil Technologies has frequently partnered with Caltrans District 7 in the delivery of numerous on-call task orders to maintain and improve this transportation network. These task orders have included diverse efforts such as pavement rehabilitation, drainage improvements, safety improvements, and curb ramp upgrades.

I-405 Roadside Safety Improvements

To enhance safety for highway workers on I-405, Advanced Civil Technologies supported the delivery of the PA/ED and PS&E for numerous improvements to be implemented between I-110 and I-105. New features include Maintenance Vehicle Pullouts and improved access roads/gates to minimize worker exposure. The project will also modify existing landscape irrigation, upgrade controllers to SMART controllers, plant ground cover to control erosion, and implement gravel mulch surfaces/rock blankets as a weed barrier. Field visits have been conducted to ensure the accuracy of developed designs. Additionally, costs have been reduced by eliminating a retaining wall that was originally proposed for the project. Over the course of both phases, our team is preparing numerous documents, including the Project Report, typical cross sections, layout plans, roadway plans, construction signing, and striping plans. Additionally, we are delivering the Storm Water Data Report (SWDR), Water Pollution Control Plan, Right-Of-Way Data Sheet, Design Standard Decision Document, and traffic handling plans.

I-605 Major Pavement Rehabilitation

The pavement on I-605 has required frequent maintenance operations over the last 20 years, resulting in regular traffic delays due to the extensive highway work. Caltrans has proposed a major pavement rehabilitation on I-605 between Telegraph Road and the I-605/I-10 interchange to significantly extend the life of the pavement. The project will implement several rehabilitation strategies, including replacing full-depth pavement structural sections, replacing distressed Portland Cement Concrete slabs, and providing a cold plane and overlay. The project will also provide various upgrades or new features, such as Maintenance Vehicle Pullouts, landscape rehabilitation, replacement of overhead sign structures, and the repair/replacement of various Transportation Management System (TMS) elements. Advanced Civil Technologies supported the PA/ED phase of the project by preparing the SWDR as well as the concept plans/cost estimates for overhead signing, striping, electrical work, and TMS elements. Currently, our team is supporting the PS&E phase by preparing construction area sign plans and motorist information plans.

SR-71 Freeway Drainage Study

To accommodate increasing traffic volumes, Caltrans is developing improvements to upgrade SR-71 to a full 8-lane standard freeway. In support of this project, Advanced Civil Technologies prepared a hydrology/hydraulics report, which included hydraulics for proposed drainage systems to be developed in association with the highway widening. The report also included the onsite/offsite runoff hydrology and provided the recommended size, type, and slope of the proposed storm drain systems required to adequately drain the area within the proposed project limits.

Middle Mile Broadband Network on I-105 and SR-91 

Advanced Civil Technologies is preparing the Project Report to provide Preliminary Engineering Design and Engineering Studies for the installation of broadband conduit and fiber on SR-91 from Vermont Street to the Los Angeles/Orange County line and on I-105 from I-405 to Studebaker Road, over 30 miles of high-capacity fiber lines that carry large amounts of data at high speeds being delivered as part of the Middle-Mile Broadband Network in the Interagency Agreement between the California Department of Technology and Caltrans. Once constructed, the broadband infrastructure will bring high-speed broadband service to unserved and underserved communities.

Preparation of SWDR, Drainage Report, and Design of One Infiltration Basin and Austin Vault Sand Filter on SR-23

Advanced Civil Technologies provided drainage engineering in support of a pavement rehabilitation project on SR-23. This task order proposed the PS&E for various Best Management Practices along the highway, which will be critical in treating storm water runoff to preserve the water quality of Calleguas Creek. Our team was responsible for the design of one infiltration basin and one Austin Vault Sand Filter. Additionally, we prepared the SWDR and the drainage report.

I-110 Roadside Safety Improvements

To improve highway worker access and safety on I-110, Caltrans has proposed several improvements to be implemented between Exposition Boulevard and Temple Street in Los Angeles. These improvements include a Maintenance Vehicle Pullout, paving areas beyond gore areas with minor concrete, implementing a rock blanket beyond gore areas, and upgrading an end treatment to a SMART system. The project will also modify one biofiltration swale near the I-110/I-10 interchange. Advanced Civil Technologies supported the PA/ED and PS&E phases of this project by developing the concept design plan, drainage plan, and hydraulics memo for the biofiltration swale. Our team also prepared the SWDR for both phases.

Pedestrian Facilities Upgrades on SR-213 from 25th Street to Carson Street

Caltrans proposed the upgrading of 67 curb ramps along SR-213 (also known as Western Avenue) to be fully ADA compliant. Advanced Civil Technologies supported the delivery of the PS&E phase of the project, preparing the construction detail plans for all 67 curb ramps on the 8-mile corridor. Innovative designs were developed to minimize right-of-way impacts, and construction was staged to maintain access to local businesses while the improvements are being built. To provide relief to the community as quickly as possible, the project was delivered on an expedited schedule.

SR-1 Bridge Rehabilitation and Replacement

Caltrans is proposing various upgrades to standardize the San Gabriel River Bridge in Long Beach. Improvements include upgrading the bridge railing to Type 80SW bridge railing, widening the bridge to standard width, widening the bridge sidewalk, and extending the sidewalk to close a pedestrian facilities gap. The project will also implement new curb ramps at each end of the bridge and widen the roadway shoulder to 8 feet, improving bicyclist safety. Advanced Civil Technologies prepared the SWDR during the PA/ED phase.

Seismic Retrofit for Connector Undercrossing at I-5/SR-2 Junction

At the I-5/SR-2 interchange, conditions have been identified for one of the undercrossing connectors that may compromise its structural integrity. These conditions have been exacerbated by a fire that occurred in 2013. Advanced Civil Technologies supported the preparation of a Project Initiation Report to preserve the integrity of the connector and ensure it will withstand a seismic event. Because the undercrossing is a cut-and-cover tunnel, a visual inspection is not possible. The report proposed the modeling of the entire structure with soil springs to determine the resulting forces on the tunnel. Our team was responsible for preparing the TMP and providing utility support.

Featured Expertise

• Highway Design

• Signing and Striping

• ADA Compliant Improvements

• Hydrology/ Hydraulics Studies

• Drainage Reports

• BMP Design

• SWDR

Relevant Projects