How We Work for Contractors:

CapEx Drainage TUNNEL Project

Stiver 2024 03 07T085019.121

Contractors, this is for you:

Stiver Engineering is a leading provider of civil engineering design services in Texas. We work for contractors to deliver quality construction projects to construction managers, owners and taxpayers.

Our team of design engineers are available to tackle diverse projects. For infrastructure improvements like the Austin CapEx Drainage Tunnel Project, Stiver assists with delegated design, tunneling design, shoring design, dewatering design and permanent structure design. We are committed to quality, safety and innovation.

We deliver tailored solutions for infrastructure development, structural design, and more. From concept to completion, trust Stiver Engineering for all your civil and structural engineering design needs.

Designer: Schnabel

Contractor: TBD, call Stiver for support services

Get Started
713-526-3478

I-35 Capital Express (CapEx)
Central Drainage Tunnel Project
in Austin, Texas

The I-35 Capital Express (CapEx) Central project in Austin, Texas, under development by the Texas Department of Transportation (TxDOT), involves improvements to 8 miles of this vital corridor serving the state’s capital.

In order for the project to be realized, the infrastructure must be designed and built to support the finished facility. One of the first steps is the construction of the I-35 CapEx Drainage Tunnel project is underneath the highway. To accommodate a project of this size, the drainage tunnels are designed to be 22-ft internal diameter and stretch approximately 6.5 miles, one leg of 3 miles and one leg of 3.5 miles.

Stiver Engineering’s professionals are veterans of tunnel design. We’ve engineered tunnels and access shafts for major projects throughout North America. We can help provide safe and effective designs for your next complex underground project.

Our Expertise

Tunneling | Shoring | Dewatering

Contact Us
Stiver Engineering Icon

View our Similar Projects

Mill Creek Drainage Relief Tunnel Project in Dallas, TX

The system was designed to restrain the hydrostatic forces on the EPB TBM cutting face. Stiver Engineering provided plans for the shoring design, as well as the concrete tunnel eye where the pipe brake system would be anchored. Anchor points were designed for both the tunnel eye seal and the steel casing pipe. We also provide a design of a concrete thrust block.
Learn More

Brushy Creek Regional Utility Authority Raw Water Delivery System in Leander, TX

Stiver Engineering was requested to design alignment piles for the template structures of upper lake tap and lower lake tap. Stiver Engineering provided the design of 27 ft embedded 36 inch diameter alignment piles. This alignment piles were optimized to a depth just above the limestone layer which resulted in significant cost optimization while maintaining the deflection well within the spec.
Learn More

Regional Water Program in Houston, TX

The system was designed to restrain the hydrostatic forces on the EPB TBM cutting face. Stiver Engineering provided plans for the shoring design, as well as the concrete tunnel eye where the pipe brake system would be anchored. Anchor points were designed for both the tunnel eye seal and the steel casing pipe. We also provide a design of a concrete thrust block.
Learn More

Waterloo Park Project at Waller Creek in Austin, TX

Stiver Engineering provided construction engineering by designing the cut through the topsoil and limestone at the headworks facility in Waterloo Park. We also designed the cast-in-place reinforced concrete for the first section of the tunnel, the reinforced concrete and rock bolt retaining walls upstream of the intake structure, and a reinforced concrete temporary bulkhead within the tunnel.
Learn More
View All Projects

Leading Civil Engineers in Engineering Design and Construction

At Stiver Engineering, we excel in transforming construction engineering concepts into practical, efficient designs. Our civil engineering company approach integrates cutting-edge techniques in construction engineering design, ensuring every project adheres to the highest standards and optimally utilizes the construction site’s potential.

Fba33665 A6Ac 4619 A4B9 Bce952E6C990

Why Choose Stiver Engineering for Your Tunneling and Engineering Needs

  • Expertise in Diverse Construction Projects: Our portfolio spans a broad array of construction engineering projects, demonstrating our versatility and deep industry knowledge.
  • Tunneling Design: Our cutting-edge tunnel design engineer services, covering a wide spectrum from storm sewer tunnel design to wastewater tunnel design to water supply tunnel design.
  • Construction Design: Our unmatched expertise in structural design and civil engineering construction makes us an invaluable partner to our clients. 
  • Dewatering Design: We understand that effective dewatering system design is crucial for the stability and success of underground construction projects.
  • Permanent Structure Design: From designing resilient bridges and bulkheads to efficient pump stations and intricate tunnels, we handle both above-ground and below-ground projects with unmatched proficiency.
  • Client-Focused Approach: We place our clients at the forefront, ensuring a seamless process in construction engineering design from initial concept to project completion.
    Innovation in Shaft Design
  • Innovative Engineering Solutions: Utilizing the most advanced methodologies in construction engineering, we deliver innovative, custom solutions tailored to each project’s unique requirements.

Contact Us for Advanced Construction Engineering Design Services

Whether you need innovative design for construction projects, expert engineering for urban developments, or strategic planning for commercial ventures, Stiver Engineering is your trusted engineering design firm. Contact us today to embark on your construction engineering project with a team committed to excellence at every stage.

Get Started
713-526-3478

Frequently Asked Questions About Hiring Civil Design Engineers

Our diverse urban and industrial landscape presents unique civil engineering challenges, from managing waterways to supporting expansive infrastructure growth.

We continuously update our practices and designs to meet the dynamic environmental conditions and regulatory changes in Texas.

Common challenges include flood control, soil stability, and designing structures to withstand Texas climate and geographical conditions.

We play a key role in developing and improving Houston’s infrastructure through innovative design and engineering solutions that cater to the city’s unique needs.

We stay abreast of the latest building codes and regulations, ensuring all our designs and projects comply fully with local standards.

Yes, our team is equipped to manage multi-disciplinary projects, integrating various aspects of civil engineering to deliver comprehensive solutions.

We employ advanced hydrological modeling and design innovative drainage and flood control systems to effectively manage water in the unique landscape.

We provide a range of services including land development, structural design, and utility engineering to support the growing commercial and industrial sectors.