I-8 at Route 98 Intersection

Project Description

Location: El Centro, CA
Value: 47.9 Million
Completed: June 2017

Project Overview

Reconstruction of Route 8 in Imperial County about 26 miles East of El Centro from 0.8 miles west of East Junction Route 98/8 Separation to 0.6 miles east of the All American Canal. Construction scope of work included the demolition of existing pavements, reconstruction of subgrade, placement of HMA, installation of reinforcement for CRCP, placement of concrete for CRCP, installation of approach slabs, installation of guardrail, misc drainage, mill and overlay of ramps, and rumble strips.

Quick Facts

338,000 cy of Roadway Excavation.
118,000 cy of Class 2 Aggregate Base.
130,000 tons of 1.5” Type A HMA.
20 miles of full roadway width steel reinforcement (10 miles each direction).
128,000 cy of PCC placed for CRCP.
CSI was able to partner with Caltrans to innovate and implement a major detour on Evans Hewes Highway, which runs parallel to the project, facilitating the construction of EB I8 in its entirety, uninterrupted by staging. This was critical in expediting the progress of the project to an early finish.
Project will be completed 13 months ahead of Contract Completion Date.

I-8 Near El Centro

Project Description

Location: El Centro, CA
Value: 50.6 Million
Completed: May 2017

Project Overview

Reconstruction of Route 8 in Imperial County near El Centro from 0.6 miles west of Anderholt Road Overcrossing to 0.5 miles east of the East Highline Canal Bridge. Construction scope of work included the demolition of existing pavements, reconstruction of subgrade, placement of HMA, installation of reinforcement for CRCP, placement of concrete for CRCP, installation of approach slabs, installation of guardrail, misc drainage, mill and overlay of ramps, and rumble strips.

Quick Facts

243,000 cy of Roadway Excavation.
109,000 tons of 1.5” Type A HMA.
20 miles of full roadway width steel reinforcement (10 miles each direction).
130,000 cy of PCC placed for CRCP.
CSI was able to partner with Caltrans to innovate and restage sequence of work to expedite schedule.
Project will be completed 9 months ahead of Contract Completion Date.

I-15 Cajon Pass Rehabilitation

Project Description

Delivery Method: Design-Build
Location: San Bernardino, CA
Value: 116.5 Million
Partner: Parsons
Completed: July 2016

Project Overview

A Coffman-led Joint Venture is the Design-Build Contractor self-performing 70% of the work to rehabilitate I-15 through the Cajon Pass, north of San Bernardino. Cajon Pass is a heavily traveled corridor, serving as the main route for high desert commuters to the Inland Empire and a major goods movement passageway. These constraints allow for limited lane closures and strict construction windows. During design, significant efforts were made to accommodate traffic and facilitate construction. The result has been an optimized design providing high quality pavement, improved safety for workers and motorists, enhanced public convenience, and expedited construction. The project significant traffic handling and MOT requirements. The staging included 4 segments of work in each direction, and 4 stages of work within each segment. Simultaneous work was required in multiple segments and varying stages to support the construction schedule. Maintaining mobility has been at the forefront of our design concepts and continues through construction.

Quick Facts

12 miles of concrete placed (52 lane-miles) in the NB and SB directions.
85,000 CY of Lean Concrete Base (LCB), and 213,000 CY of Jointed Plain Concrete Paving (JPCP) placed using Dowel Bar Insertion.
Over 5 miles of Concrete Barrier Type 60.
Innovative traffic handling plans including multiple construction bypass lanes and split direction traffic.
Eliminated several miles of pre-cast panels and replaced with 50+ year JPCP.
Job completed within allowable contract time and under budget.

I-805 North HOV/BRT Project

Project Description

Delivery Method: Design-Build
Location: San Diego, CA
Value: 74.5 Million
Prime Contractor: Skanska USA Civil West
Completion Date: June 2016

Project Overview

On one of the busiest freeways of San Diego County, Coffman Specialties, Inc. completed a 3.5 mile HOV addition to I-805 NB and SB and outside widening through Sorrento Valley to alleviate the traffic congestion. In June of 2016, the HOV lanes were opened along with the Direct Access Ramp (DAR) for easy access for commuters and buses to enter and exit the freeway at Carroll Canyon Rd.

Quick Facts

24,000 CY of Jointed Plain Concrete Pavement (JPCP) Placed using Dowel Bar Insertion.
3 Miles of Concrete Barrier paved by slipform paver in center median.
Rapid Strength Concrete placed during 24 hour weekend closure.

Naval Air Weapons Station China Lake – Test Track

Project Description

Location: China Lake, CA
Value: $13.4 Million
Completed: 2007

Project Overview

NAWS China Lake is home to the Navy’s airborne weapons testing and training range. CSI was selected to build two vehicle tracks some 40 miles from the base infrastructure. One was to be 10,000 linear feet, the other 6,500, and the project included a storm diverter and drainage system. The design/build contract required construction to begin within one week of signing. Complicating the project were its remote, boulder-strewn location on the side of a mountain; trying to match topographic surveys and final design to the Navy’s original intent; and the mandate that all work be complete in 120 days.

The original design called for asphalt surfacing mainly because of the difficulty importing and staging materials. CSI had a better idea and using a mobilized crusher, reduced the surrounding rock into aggregate for the bases and rip rap for the storm diverters.

Bringing water to the site from 80 miles away, CSI moved 400,000 cubic yards of earth and rock, and poured 120,000 square yards of PCC, all within the short 120-day window in the midst of winter. Instead of 3” asphalt paving, NAWS China Lake received 6” of concrete at the same price. Additionally, extra crushed rock was used to improve the 6 miles of access roads. The only material imported, besides water, was washed concrete sand.

Quick Facts

16,500 linear feet paved.
120,000 square yards of concrete poured.
400,000 cubic yards of earth and rock moved.

I-15 I-215 Kenwood and Devore

Project Description

Location: Rialto, CA
Value: $40 Million
Completed: 2007

Project Overview

CALTRANS selected Coffman Specialties, Inc. to complete two projects on one of the busiest freeway areas in the world, the I-15/215 separation near Rialto, California, 60 miles east of Los Angeles. Both required the integration of multifunctional traffic handling strategies: lane closures, alternate directional flow and moveable barriers.

The projects involved the removal and replacement of existing concrete pavement as well as the construction of additional lanes, widened medians, a widened bridge and other work. To minimize lane closure time to the public, CSI used a variety of concrete mixes to reduce curing time. Existing concrete was removed with non-impact methods during weekends only, when traffic would be lighter. New concrete was poured and the lanes reopened to traffic by 5am on Mondays.

By reducing actual lane closures by 30-40% of the amount allowed by the contract and using design and construction efficiencies, CSI greatly reduced the cost to CALTRANS and to the public. They were awarded the maximum incentive bond for each project, $500K and $560K respectively, as well as won recognition for their integration of constructability applications, innovative techniques and public awareness of the actual work schedule.

Quick Facts

Major construction on one of the main entry/exits to Los Angeles.
Over $1 million in incentive bonds earned.
Projects were 150 and 100 days respectively.
Lane closures reduced by 30-40%.

I-15 Victorville to Barstow CA

Project Description

Location: Victorville, CA
Value: $28 Million
Completed: 2004

Project Overview

Interstate Route 15 is the 4th longest North-South transcontinental highway in the U.S. CSI was selected as the concrete paving subcontractor to reconstruct 25 miles of the entire north- and south-bound lanes between Victorville and Barstow in the high desert of California.

Because the route is a major thoroughfare between the two cities, traffic handling and easing traffic congestion was of particular concern. CSI used a specialty paver capable of automatically inserting traverse dowel rods while on the move and paved the entire 3 lanes plus shoulder in one pass in each direction – a total width of 46½ feet. Lean concrete base and pavements totaled more than 500,000 cubic yards.

Even though an on-site concrete plant and multiple sites were used to lessen the effects of weather conditions and minimize grid lock on the travelway, some loads of concrete were hauled over seven miles to the paving machine.