--- title: Clean and Sustainable Water Supply to I-35 Corridor description: HVJ recommended on-site trench material as pipe bedding and reduced material trucked to the project at significant cost and time savings to Alliance --- [![HVJ Logo](https://www.hvj.com/hs-fs/hubfs/HVJ%20logo_141x71.png?width=110&height=71&name=HVJ%20logo_141x71.png "HVJ Logo")](https://www.hvj.com/?hsLang=en) ** [ Let's talk ](https://www.hvj.com/contact-us?hsLang=en) ** ** Geotechnical Engineering Soil, rock, and groundwater conditions at every site are different. We assess the specific site conditions and design earth structures (slopes, channels, and dikes), foundations (retaining walls, bridges, buildings, tanks), and subsurface structures (clarifiers, lift stations, buried utilities, tunnels) to economically achieve the specific project objectives. Learn More → Construction Materials Engineering & Testing Construction material performance is key to the function and durability of any project. We engineer and test materials such as soil, concrete, and asphalt so you get what you pay for and the project performs as expected.     Learn More → Civil/Pavement Engineering A successful project starts with clear understanding of the project’s specific needs. We prepared street rehabilitation PS&E, traffic control designs, pavement designs, and asset management systems based on careful understanding of design requirements.   Learn More → Environmental Geology & Engineering Impact from hazardous waste, wetlands, faulting, and/or NEPA processes are serious concerns for project development. We identify such concerns early in project development, and provide strategies to mitigate impacts and provide the proper regulatory approval so the project can proceed on time and achieve the project goals. Learn More → Roads & Bridges Congestion and failing road surfaces cause delays, vehicle damage, and even driver safety issues. Solving these problems requires our specialized knowledge of pavement and roadway structures. Learn More → Water, Wastewater & Flood Control Drinking water, flushing toilets, and dry streets for granted – until they are gone. We specialize in keeping these systems running effectively. Learn More → Airports, Ports & Dredging Expanding and maintaining ports and airports is crucial to our economic development. HVJ’s specialized pavement, wharf, and navigation channel experience makes it happen. Learn More → Rail & Transit Rail and public transit facilities enable efficient transportation of people and goods. Our detailed knowledge of AREMA requirements keeps projects on track. Learn More → Buildings & Parks Schools, universities, courts, parks, solid waste facilities are all critical to our society. HVJ has specialized knowledge and experience with a multitude of public projects. Learn More → [About Us](https://go.hvj.com/about-us?hsLang=en) [News & Resources](https://www.hvj.com/blog?hsLang=en) [Locations](https://www.hvj.com/all-locations?hsLang=en) [Partners](https://www.hvj.com/partners?hsLang=en) HVJ Difference Our engineers provide a unique blend of capabilities and experience because of the support they receive. Employees do not simply exist here. They thrive. Learn More → Culture We are committed learners, empowered to interact based on making strong commitments. We take ownership of our actions and results. Learn More → Benefits We believe in taking care of our employees. We offer a rewarding work experience, opportunities for advancement and competitive benefits. Learn More → Employee Stories Check out what our employees say and learn about the HVJ experience! Great people and even greater teams are behind every project. Learn More → Current Openings We're always looking for talented individuals who fit our culture and can bring new perspectives and experiences to our growing teams. Learn More → The Opportunity Own a successful engineering business by adding our proven systems to your engineering talent and network. Learn More → How It Works Help us branchise – you help us build a branch office and then convert it into your own franchise. Learn More → Who's A Fit? Are you energetic and confident? See if this might be an opportunity that fits you. Learn More → FAQs What do you want to know?  Find the answers to common questions. Learn More → Success Stories Hear about the outstanding results our current franchisees have produced using our proven systems. Learn More → [![HVJ Logo](https://www.hvj.com/hs-fs/hubfs/HVJ%20logo_141x71.png?width=110&height=71&name=HVJ%20logo_141x71.png "HVJ Logo")](https://www.hvj.com/?hsLang=en) ** [ Let's talk ](https://www.hvj.com/contact-us?hsLang=en) ** ** Geotechnical Engineering Soil, rock, and groundwater conditions at every site are different. We assess the specific site conditions and design earth structures (slopes, channels, and dikes), foundations (retaining walls, bridges, buildings, tanks), and subsurface structures (clarifiers, lift stations, buried utilities, tunnels) to economically achieve the specific project objectives. Learn More → Construction Materials Engineering & Testing Construction material performance is key to the function and durability of any project. We engineer and test materials such as soil, concrete, and asphalt so you get what you pay for and the project performs as expected.     Learn More → Civil/Pavement Engineering A successful project starts with clear understanding of the project’s specific needs. We prepared street rehabilitation PS&E, traffic control designs, pavement designs, and asset management systems based on careful understanding of design requirements.   Learn More → Environmental Geology & Engineering Impact from hazardous waste, wetlands, faulting, and/or NEPA processes are serious concerns for project development. We identify such concerns early in project development, and provide strategies to mitigate impacts and provide the proper regulatory approval so the project can proceed on time and achieve the project goals. Learn More → Roads & Bridges Congestion and failing road surfaces cause delays, vehicle damage, and even driver safety issues. Solving these problems requires our specialized knowledge of pavement and roadway structures. Learn More → Water, Wastewater & Flood Control Drinking water, flushing toilets, and dry streets for granted – until they are gone. We specialize in keeping these systems running effectively. Learn More → Airports, Ports & Dredging Expanding and maintaining ports and airports is crucial to our economic development. HVJ’s specialized pavement, wharf, and navigation channel experience makes it happen. Learn More → Rail & Transit Rail and public transit facilities enable efficient transportation of people and goods. Our detailed knowledge of AREMA requirements keeps projects on track. Learn More → Buildings & Parks Schools, universities, courts, parks, solid waste facilities are all critical to our society. HVJ has specialized knowledge and experience with a multitude of public projects. Learn More → [About Us](https://go.hvj.com/about-us?hsLang=en) [News & Resources](https://www.hvj.com/blog?hsLang=en) [Locations](https://www.hvj.com/all-locations?hsLang=en) [Partners](https://www.hvj.com/partners?hsLang=en) HVJ Difference Our engineers provide a unique blend of capabilities and experience because of the support they receive. Employees do not simply exist here. They thrive. Learn More → Culture We are committed learners, empowered to interact based on making strong commitments. We take ownership of our actions and results. Learn More → Benefits We believe in taking care of our employees. We offer a rewarding work experience, opportunities for advancement and competitive benefits. Learn More → Employee Stories Check out what our employees say and learn about the HVJ experience! Great people and even greater teams are behind every project. Learn More → Current Openings We're always looking for talented individuals who fit our culture and can bring new perspectives and experiences to our growing teams. Learn More → Agencies HVJ has been proud to support hundreds of public agencies meet and exceed service expectations from their constituents.  Learn More → Consultant Clients We’ve developed ongoing teaming relationships with many consulting firms based on delivering outstanding client satisfaction. Learn More → Providers Our success strongly depends on our business associates that provide the products and services we need. Learn More → HVJ Difference Our engineers provide a unique blend of capabilities and experience because of the support they receive. Employees do not simply exist here. They thrive. Learn More → Culture We are committed learners, empowered to interact based on making strong commitments. We take ownership of our actions and results. Learn More → Benefits We believe in taking care of our employees. We offer a rewarding work experience, opportunities for advancement and competitive benefits. Learn More → Employee Stories Check out what our employees say and learn about the HVJ experience! Great people and even greater teams are behind every project. Learn More → Current Openings We're always looking for talented individuals who fit our culture and can bring new perspectives and experiences to our growing teams. Learn More → The Opportunity Own a successful engineering business by adding our proven systems to your engineering talent and network. Learn More → How It Works Help us branchise – you help us build a branch office and then convert it into your own franchise. Learn More → Who's A Fit? Are you energetic and confident? See if this might be an opportunity that fits you. Learn More → FAQs What do you want to know?  Find the answers to common questions. Learn More → Success Stories Hear about the outstanding results our current franchisees have produced using our proven systems. Learn More → Search **Menu** ** ** [![Let's Talk](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/5496911/6233d0db-c76c-4678-9152-08331c17b6f1.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/5496911/6233d0db-c76c-4678-9152-08331c17b6f1) ![ARWA - drinking water](https://www.hvj.com/hs-fs/hubfs/ARWA%20-%20drinking%20water.jpg?width=500&name=ARWA%20-%20drinking%20water.jpg "ARWA - drinking water") Clean and Sustainable Water Supply to I-35 Corridor ![Alliance+Logo-horizontal](https://www.hvj.com/hs-fs/hubfs/Alliance+Logo-horizontal.jpg?width=736&height=148&name=Alliance+Logo-horizontal.jpg "Alliance+Logo-horizontal") ## Project Background [Alliance Regional Water Authority](https://alliancewater.org/) (Alliance) needed to pull together a mission that would deeply impact the area south of Austin, Texas. Due to rapid growth in the Austin-San Antonio Corridor, water supply demand is steadily increasing and expected to continue for the next few decades, as population growth is projected to catapult from 4.27 to 5.71 million from 2014 to 2030. Alliance needed a solution to provide reliable water supply for years to come.   With multiple consultants working simultaneously for Alliance, HVJ worked on tunneling and open cut pipeline on three different segments of the project simultaneously.  Success would require exceptional teamwork and communication. Our partners [LAN Inc.](https://lan-inc.com/), [BGE Inc](https://www.bgeinc.com/)., and [LNV](https://ardurra.com/) needed a “one-stop-shop” to stay on the same page and get geotechnical knowledge and expertise to complete this extensive and nearly decade long project.  ### **Practice:** [Geotechnical Engineering](https://www.hvj.com/geotechnical-engineering-services?hsLang=en), [CoMET](https://www.hvj.com/constuction-materials-engineering-testing?hsLang=en) ### **Sector:[Water](https://www.hvj.com/water-wastewater-flood-control?hsLang=en)** ### **Location:** [Austin](https://www.hvj.com/southcentral-texas?hsLang=en) ### **Services: ****Open Cut and Trenchless Pipeline Design, Geotechnical Baseline Report (GBR), Fill Suitability/Compaction Control, Portland Cement Concrete Testing**  ![ARWA - Large Dia Pipe](https://www.hvj.com/hubfs/ARWA%20-%20Large%20Dia%20Pipe.jpg "ARWA - Large Dia Pipe") ## The Problem Finding a new reliable potable water source was one matter, but the pipeline toward Maxwell and Lockhart was another challenge altogether. The planned water supply line goes cross-country with creek and interstate highway crossings.  Accessing the alignment for the investigation was a challenge to keep the project on schedule.  Assessing conditions at creek and highway locations requiring tunneling was a key risk for the project.   ## The Goal - A design that would provide a sustainable water supply from Buda to San Marcos that would meet rising demand for several decades into the future - Staying on schedule and within budget. - Keeping the project on track would be especially important to meet the required demand.   ## Our Solution  HVJ Associates® listened closely to our clients and Alliance to give them a design that would accommodate the fast growth in the region south of Austin with a sustainable water supply. HVJ provided multiple drilling crews capable of drilling in sugar sand soils and hard rock along the 30-mile alignment to meet all three simultaneous project schedules.   HVJ provided tunneling design information including Geotechnical Baseline Reports (GBR’s) for water line crossings at Plum Creek and three IH 35 crossings to manage subsurface risks for the owner and contractor. The geotechnical baseline report (GBR) was advantageous for allocating and managing subsurface risks associated with subsurface construction.  ## The Results HVJ’s recommendation for use of on-site trench material as pipe bedding dramatically reduced the use of material trucked to the project at significant cost and time savings to Alliance.  Further, upsized casing  (recommended by HVJ) allowed the contractor to overcome mixed face conditions and potential delays.   Share this story [![Share on Facebook](https://static.hubspot.com/final/img/common/icons/social/facebook-24x24.png)](http://www.facebook.com/share.php?u=https%3A%2F%2Fwww.hvj.com%2Fclean-sustainable-water-supply-to-i-35-corridor%3Futm_medium%3Dsocial%26utm_source%3Dfacebook) [![Share on LinkedIn](https://static.hubspot.com/final/img/common/icons/social/linkedin-24x24.png)](http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.hvj.com%2Fclean-sustainable-water-supply-to-i-35-corridor%3Futm_medium%3Dsocial%26utm_source%3Dlinkedin) [![Share on Twitter](https://static.hubspot.com/final/img/common/icons/social/twitter-24x24.png)](https://twitter.com/intent/tweet?original_referer=https%3A%2F%2Fwww.hvj.com%2Fclean-sustainable-water-supply-to-i-35-corridor%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&url=https%3A%2F%2Fwww.hvj.com%2Fclean-sustainable-water-supply-to-i-35-corridor%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&source=tweetbutton&text=Clean%20and%20Sustainable%20Water%20Supply%20to%20I-35%20Corridor%20) [![Share on Email](https://static.hubspot.com/final/img/common/icons/social/email-24x24.png)](mailto:?subject=Check%20out%20https%3A%2F%2Fwww.hvj.com%2Fclean-sustainable-water-supply-to-i-35-corridor%3Futm_medium%3Dsocial%26utm_source%3Demail%20&body=Check%20out%20https%3A%2F%2Fwww.hvj.com%2Fclean-sustainable-water-supply-to-i-35-corridor%3Futm_medium%3Dsocial%26utm_source%3Demail) #### HVJ Associates, Inc. 6120 S. 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