Underground Solutions provides infrastructure technologies for water and sewer applications. UGSI's Fusible PVC® products contain a proprietary PVC formulation that, when combined with UGSI's patented fusion process, results in a monolithic, fully-restrained, gasket-free, leak-free piping system. Fusible C-900® and Fusible C-905® both comply with AWWA C900 and C905 respectively and are certified to NSF 61.

Monday, October 5, 2015

King County, Wash., Takes on Challenging Project to Control CSOs


Horizontal directional drilling (HDD) projects continue to progress into more and more challenging applications. ‘At-grade’ HDD techniques or drills where the profile is maintained at a constant grade to allow for gravity flow applications are a particularly challenging application — especially as pipe sizes get larger and alignment lengths get longer.

To further add to the complexity of the project, a series of three horizontal curves were also necessary to connect the entry and exit locations and remain primarily within the available public right of way.

One recent example of HDD technology and a strong project team overcoming a unique set of technical challenges, including an ‘at-grade’ application, occurred in Seattle. A 32-in. outer diameter (OD) gravity sewer pipeline was installed using HDD methods for King County to reduce combined sewer overflows (CSO) into Elliott Bay. This large design-bid-build project included a 3,151-ft HDD that required a grade of 1.8 percent through a glacial bluff to convey flows into a 1.5 million-gal retention storage tank.

The new pipeline augments an older section of King County’s wastewater system, which was comprised of a single pipeline to carry both sewage and stormwater runoff. This combined sewer collection is routed to a wastewater treatment plant that treats the waste stream; however, during periods of heavy rainfall, the pipeline can easily surcharge, leading to a CSO into Puget Sound.

King County implemented this project to meet the requirements of the Washington State Standard and to reduce the frequency of CSOs into Puget Sound, which can pose a risk to public health and the environment. Currently King County has reduced CSOs by 90 percent countywide, and succeeded in keeping more than 2.3 billion gals of sewage out of local waterways.

Read the full story at http://trenchlessonline.com

KRG Utility Completes Static Pipe Bursting Project In Wilmington, N.C.

In 2007, the U.S. Environmental Protection Agency (U.S. EPA) issued a Special Order of Consent (SOC) with the state of North Carolina regarding a series of sanitary sewer overflows that occurred in the city of Wilmington. That SOC led to several challenging pipe bursting projects facilitated by trenchless contractorKRG Utility Inc., Lenoir, N.C.

Since that time, the management of the wastewater treatment systems in the City of Wilmington and New Hanover County has been taken over by the Cape Fear Public Utility Authority (CFPUA). The CFPUA, now responsible for those sewer systems, entered into a consent decree with the U.S. EPA in 2013, resolving the claims by the EPA regarding overflows in the City of Wilmington and New Hanover County’s systems.

Read the full story at http://trenchlessonline.com/
KRG Utility used a Grundoburst 1900G from TT Technologies to burst and replace the ductile iron force sewer main with Fusible PVC pipe.

Friday, April 17, 2015

City of Lawrence, Kansas Installs 36-inch Fusible PVC® Pipe for Critical Water Transmission Main Crossing the Kansas River

Home to 90,000 residents and the University of Kansas, the City of Lawrence has been providing drinking water to the city and its surrounding areas for over 100 years. The city currently has two water treatment plants (Kaw WTP and Clinton WTP), six storage sites, 19 high service pumps, and a distribution system consisting of approximately 460 miles of pipe ranging in size from 2-inch to 24-inch that serves an area of 30 square miles.

The KAW Water Treatment Plant, originally built in 1917, is located on the south side of the Kansas River and draws water from the river and six alluvial wells. The treatment plant is well situated given that the majority of Lawrence is located south of the river, including the downtown area and the University of Kansas. The portion of the city located on the north side of the Kansas River (North Lawrence) received all of its treated drinking water via a single transmission line affixed to the Vermont Street bridges. The aging transmission main presented a major challenge to the City’s ability to provide reliable water service to North Lawrence.

In order to provide another feed to North Lawrence, and provide additional supply for future growth, a second transmission main crossing the Kansas River was planned. Early in the preliminary design phase it was determined that horizontal directional drill (HDD) installation was the preferred method for crossing the Kansas River. An integral part of the preliminary engineering design included a material selection study. According to Jeff Heidrick of Burns and McDonnell, “The City of Lawrence liked the idea of installing a material that would not be susceptible to corrosion. Once it was demonstrated that Fusible PVC® pipe could meet the short-term installation stresses, long-term operating conditions, and was cost competitive with other options, it was selected as the preferred material.” Not only was Fusible PVC® pipe utilized in the HDD sections, it was also used in the open-cut sections to provide a fully-restrained pipe system for this critical section of infrastructure.

The project was competitively bid in December 2013. Garney Construction was the selected bidder and was awarded the project. Garney had completed multiple projects utilizing Fusible PVC® pipe, including the O’Connell Road Water Line Project in Lawrence that consisted of 9,400 LF of 16-inch and 800 LF of 12-inch Fusible PVC® pipe.

Garney subcontracted Environmental Crossings, Inc. (ECI) to perform the directional drills on the project. ECI mobilized to the job in March 2014 to start on the Kansas River drill. The alignment consisted of drilling through sandy clays with some gravels in the upper elevations and sandstone rock at the deeper elevations of the river crossing. While drilling sandstone can be time consuming and hard on down-hole drill equipment, it provides a stable borehole for pullback. The 2,400 LF Kansas River drill was pulled in over an 18-hour period on May 22, 2014. After the remaining two drill sections were installed, Garney began the open-cut portion of the job.

In total, 6,800 feet of 36-inch DR21 Fusible C-905® pipe was installed on the project, including three HDDs (2,400 LF, 1,400 LF, and 800 LF), 2,000 LF of open-cut, and approximately 200 LF of pipe installed inside a steel casing. The entire line was pressure tested and brought into service in January 2015, providing the City of Lawrence much needed redundancy and additional capacity within its system.

Monday, March 9, 2015

Fusible PVC® Pipe a Growing Solution for Water & Wastewater Infrastructure at U.S. Military Bases

U.S. Military Engineers face unique challenges when designing and constructing infrastructure projects on military bases. These challenges include contaminated soils, crowded or unknown underground utilities, and limited budgets. Military Engineers have found a product in Fusible PVC® pipe that can provide unique solutions, savings, and long service life for both new installations and rehabilitation projects. Fusible PVC® pipe meets these objectives by combining material familiarity, chemical resistance, and long service life in a wide range of installation methods including both trenchless and traditional open-cut excavation.

Read the full story at:

Monday, October 20, 2014

Tuesday, August 26, 2014

City of Taylor Embarks on Major Water Main Replacement Program with Fusible PVC® Pipe and Static-Pull Pipe Bursting

In February 2013, the City of Taylor, Michigan kicked off an extensive water main replacement program.
Ultimately, 25,780 LF of 8-inch and 12-inch Fusible PVC® pipe would be installed in the tight confines of Taylor’s residential neighborhoods, with the majority of the new pipe replacing 8-inch cast iron water mains originally installed over a half century ago. In order to minimize the disruptive impact of construction, the City decided to install the replacement pipe using trenchless methods.

Approximately 16,780 LF of the project was completed by static-pull pipe bursting, with another 9,000 LF
installed via horizontal directional drilling (HDD). There were more than 400 service saddles installed on the Fusible PVC® pipe throughout the project. The City used the same standard service saddles used with its belland-spigot PVC pipe. The fused pipe strings were charged, chlorinated, and pressure tested prior to pull-in.

Read the full Customer Profile at the link below.

WM Improvements - Taylor, MI

Tuesday, July 15, 2014

DC Water Elects to Reinforce 36” Water Main with Fusible PVC® Pipe Slipline

The District of Columbia Water and Sewer Authority (DC Water) is implementing its Long Term Control Plan to reduce sewer overflows from the District’s combined sewer system into the watershed and, ultimately, the Chesapeake Bay. The work under Division E will occur on M Street SE, between 9th Street SE and 14th Street SE, diverting flow from existing combined sewers through a series of 48-inch and 108-inch diameter diversion sewers constructed by tunneling. The 36” Southeast Relief Water Main (SRWM), under M Street, was determined to be in jeopardy due to possible settlement as a result of construction of the diversion sewers. Therefore, structural rehabilitation options were evaluated and designed prior to construction of the new facilities.

Ultimately, the designer, CDM Smith, chose to competitively bid two rehabilitation methods, pressure cured in placed pipe (CIPP) and sliplining. In evaluating sliplining, both HDPE and Fusible PVC® pipe were
investigated. The final decision to specify 30-inch Fusible PVC® pipe was based on both constructability and the need to maintain flow through the rehabilitated line. The comparison of the two pipe choices is illustrated here:

Click on the link below to read the full profile:
Washington DC Water Main - 06.30.14

Tuesday, June 10, 2014

Cost-effective service line repair

Water utilities combat leaks with a flexible, durable pipe that’s installed via trenchless technologies.

Tuesday, June 3, 2014

San Clemente Capitalizes on Fusible PVC® Pipe for Innovative Slipline Project

The City of San Clemente, California has long been considered a gem on the Southern California coastline. The 18 square mile area located on the southern border of Orange County is home to 55,000 residents. The City is committed to responsible use of available water resources to sustain the lifestyle of the community and it continues to expand a robust recycled water distribution system. The City operates a 2.2 million gallon-per-day water reclamation plant for tertiary treatment in accordance with California’s Title 22 program. As with most recycled water projects, the most significant challenge is economical distribution of the product water for beneficial use.

Thinking creatively, the City saw an opportunity to convey recycled water utilizing 16-inch Fusible PVC® pipe slipped into an abandoned cement pipe with a 20-inch inside diameter. This trenchless installation of more than 2,000 feet of fused 16-inch PVC pipe greatly reduced the cost of conveyance since excavation and the associated traffic control was limited. Additionally, the high-strength properties of the Fusible PVC® pipe allowed for the largest possible inside diameter, yielding the maximum carrying capacity for the completed line.

The pull-in operation was completed using a cable winch, with all 2,026 LF pulled into the host pipe during one shift. Connections to the existing system were accomplished with standard ductile iron fittings. Contractor Don Colich said: "We were very happy with the Fusible PVC® product. It worked very well for us on this job. Underground Solutions gave us great support and we worked as a team to complete a very successful project."

Download the full project profile at the link below:
San Clemente, CA - 05.29.14

Monday, March 31, 2014

Five Million Feet and Growing

Since introduced a decade ago, more than 1,000 miles of Fusible PVC--the trade name for manufacturing and installation process patented by Underground Solutions Inc. (UGSI) of Poway, Calif.--have been installed in North America.

Read the full story at:


2013 Trenchless Technology Project of the Year - Rehab Winner

The Consolidated Mutual Water Co. (Consolidated) serves approximately 90,000 residents in Lakewood, Wheat Ridge and unincorporated portions of central Jefferson County in the 'Metro' are surrounding Denver, Colo. Treated water is delivered through 380 miles of pipelines and 21,100 tap connections over a service area of 27 sq miles.

Read the full story at:

Sliplining Rehabilitates Critical Water Supply Line

It’s tough to imagine a more difficult job than rehabilitating a water pipeline passing 25 ft beneath an interstate highway bordered with steep embankments in a busy tourist area, but that’s what the Las Vegas Valley Water District faced. BY JIM FORCE

Read the full article at:

Monday, October 22, 2012


The deterioration of US water distribution infrastructure is reaching a critical stage. Upgrades must be conducted rapidly to avoid catastrophic public health and financial risks. Trenchless pipe repair techniques can be part of an infrastructure rehabilitation solution. BY DON TALEND

Read the full article at: http://undergroundsolutions.com/articles

Wednesday, May 30, 2012

Napa Uninterrupted

Read about how the City of Napa installed 7,400 ft watermain of Fusible PVC with environmental constraints and location difficulties.


Friday, January 6, 2012

Pioneering Spirit in Colorado

“Here’s an interesting article that discusses the success one Denver area water utility has had with trenchless rehabilitation using Fusible PVC™ pipe.  The open-cut replacement costs were about $115/foot and pipe-bursting was below $50/foot in 2011. "  Read the article at

Tuesday, March 29, 2011

Sliplining in Sacramento

California’s capital city selects fusible C-905® Pipe for downtown potable water slipline project.  Read more at http://www.ucononline.com/sliplining-sacramento

Monday, February 21, 2011

Monday, November 8, 2010

Fusible PVC™ is Awarded Project of the Year by Trenchless Technology

The 2010 Trenchless Technology Project of the Year for New Installation brought together everything that is exciting about a challenging project: teamwork, tough subsurface conditions, challenging logistics and drilling under water over a great distance that sets a new standard for pipe performance.

All of these elements successfully converged in New Jersey in spring 2010, resulting in a 5,365-ft HDD project that brought customers of the Middlesex Water Co. a new 24-in. fusible PVC water main that was able to be installed quickly, efficiently and perhaps, more importantly, cost-effectively. Project officials also note that this project set a world-record for distance using 24-in. FPVC.

The project took place in a largely urban area in central New Jersey in Perth Amboy and Sayreville. An overwhelming majority of the project (some 4,800 ft) took place under the Raritan River and adjacent marshland…

Read more of the article at http://www.undergroundsolutions.com/articles/TT-2010-Project-of-the-Year%20Winner.pdf

Thursday, July 15, 2010

6,400 LF Pull of 16” FPVC® Pipe by Beaufort Jasper Water & Sewer Authority and Mears Group Extends Fusible PVC™ HDD Record

Less than three years after the record-setting 5,120 LF Secession Effluent Main project was successfully completed, Beaufort Jasper Water & Sewer Authority (BJWSA), Mears Group, Inc., and Underground Solutions, Inc. (UGSI) have set a new record for the longest single continuous horizontal directional drill (HDD) pullback of thermoplastic pipe.

In September 2008, BJWSA assumed ownership, operation, and maintenance responsibility for the water and wastewater systems at several local military facilities, including the Marine Corps Recruit Depot at Parris Island, SC. As part of the merger, all of the water and sewer utilities are undergoing upgrades and improvements. Due to restrictive Beaufort River discharge requirements, the military wastewater plants at the Air Station and Parris Island will be eliminated with flows diverted to the state-of-the-art Port Royal Island, SC Water Reclamation Facility.

Project: Military Wastewater Consolidation Project
Owner: Beaufort Jasper Water & Sewer Authority
Engineer: Hussey, Gay, Bell & DeYoung (HGBD)
Contractor: Mears Group, Inc.
Location: Beaufort, SC
Length: 6,400 LF
Pipe Size: 16” DR18 FPVC®
Pressure Test: 150 psi for 4 hours
UGSI Contact: Gary Shepherd;

The new sewer force main from Parris Island was installed under Archer’s Creek and the surrounding marsh via HDD to ensure minimal impact to the environment. Mears Group mobilized in October 2009 with two drill rigs, prepared to use the intersect method to complete the pilot drill if necessary. Ultimately, the 6,400 LF pilot drill exited on target without requiring the use of intersect technology. The bore hole was reamed out in three passes to a 32” diameter, then prepared by swabbing with a barrel reamer to clear cuttings and reinject clean slurry.

On December 2, 2009, the 6,400 length of fused 16” DR 18 FPVC® pipe was positioned on rollers and pulled into place with an excavator. The pull head was then connected to the drill stem to begin the process of pulling the pipe from Horse Island, under Archer’s Creek, and onto Jericho Island. The pipe emerged during the predawn hours of December 3rd to the applause of the small group of interested bystanders and a much larger number of tired, but satisfied workers.

Ed Saxon, BJWSA Deputy General Manager, commented: “The force main leaving Parris Island became a real design challenge because the narrow causeway linking the mainland was off limits to construction. Open cutting across the salt marsh would also have been very difficult, even had it been possible to permit. BJWSA’s growing body of experience with long HDD installations and recent advances in the technology made drilling the only viable option. Fusible PVC™ pipe was the only practical alternative for us, and we’ve had great experience with Mears Group as well.”

Jennifer Oetgen with HGBD remarked: “The design was critical to a successful outcome; early onsite consultations with representatives from Mears and UGSI confirmed the viability of a 6,400 LF HDD, but the possibility of an intersect drill, staging that length of pipe, and working within the requirements of the military made this project particularly challenging and satisfying.”

Thursday, May 20, 2010

New Fusible PVC Flow Calculator

Check out UGSI's new pipe flow calculator at the link below. This tool can be used to find head loss, pressure change, fluid velocity, and pumping costs for a variety of pipeline materials.