Descriptions of sample projects from each of our service areas are
This is a high-level list of our projects. View Featured Projects here ›
Falcon Way Stormwater Project
Client: Sandy City
Sandy City hired Bowen, Collins & Associates to evaluate and design improvements for the Falcon Way Storm Water Project. Sandy City had been experiencing recurring flooding due to stormwater runoff in the area of the City near 9400 South and Highland Drive. Falcon Way Road is located within a valley of a large drainage basin, with all of the stormwater draining to the intersection of Falcon Way and Highland Drive, ponding in the intersection. The existing stormwater system within Falcon Way had significant inlet deficiencies, limited capacity, and also conveys irrigation water during the summer month when large thunderstorms typically occur. Within the drainage basin there were also two existing detention basin, located in parks, which had limited inlet and outlet capacities. The Falcon Way Storm Water Project included an analysis of the existing combined stormwater/irrigation system in the area. Multiple projects were designed to mitigate flooding within the study area.
The project included construction of approximately 8,525 linear feet of reinforced concrete storm drain pipeline ranging in size from 24-inch to 48-inch, including a 4’ x 7’ box culvert crossing of Highland Drive and associated manholes, catch basins, laterals, new detention basin inlet and outlet structures, diversion structures, and associated landscaping repairs. The areas of construction included residential neighborhoods, crossings through private properties, crossings through multiple Sandy City parks, and a crossing of a major arterial road. The project included extensive coordination with residents both prior to and during construction and coordination with multiple agencies including Sandy City Public Works and Sandy City Parks Department. This project was constructed to increase inlet and drainage capacity within the drainage basin and also to improve inlet and outlet efficiency and operation and maintenance of the existing detention basins.
At the end of the project, when the majority of the new stormwater infrastructure was installed, the City experienced a large cloudburst within the drainage basin. The new stormwater improvements had the capacity to collect all of the stormwater and convey it to the existing detention basins, filling the basin. No flooding occurred within the project area from this cloudburst.
Client: Virgin Valley Water District
At a total treatment capacity of 22 MGD, the Virgin Valley project is one of the largest arsenic treatment projects in the nation, and one of the first of its kind to utilize conventional filtration treatment for arsenic removal. Based upon the treatment alternatives study results, the recommended conventional filtration treatment system design resulted in substantial life cycle cost savings to VVWD over other proprietary technologies. The project included construction of five separate treatment plants designed to remove arsenic from eight groundwater wells using a coagulation/filtration process with chemical addition. The filtration takes place in steel vertical pressure filters with dual media filter beds. The estimated project construction cost was $26,000,000.
Key project tasks performed by the Bowen Collins & Associates team include: evaluation of current arsenic treatment process technologies and recommendation of the most economical and effective process; preliminary design and layout for the recommended treatment system; provided on-site pilot treatment system and supervise its operation. The pilot study included evaluation and optimization of media depth, filter loading rates, chemical addition, and backwash process. Final process recommendations were summarized in a pilot study report; assisted in the permitting process and coordinated with state and federal regulating agencies; and assisted the owner in qualifying for and obtaining state and federal funding for the project.
The final project design included the following elements: five separate plant buildings with a total of 27 vertical steel pressure filters, each with separate chemical room, mechanical room, filter room, and associated piping; backwash system, including air blowers, booster pumps, automatic flow/pressure control valves, piping and valving, system controls, and backwash disposal systems; instrumentation, process controls, SCADA, and power and electrical systems; building architectural and structural design, civil site plans, and landscaping plans; chemical storage, metering, and delivery systems, with a total chemical storage capacity of over 28,000 gallons, with a metering system capable of delivering over 1,200 gallons of chemical per day at the five plants; design of eight booster pump stations and four PRV valve vaults; hydraulic integration of the five plants into the District’s water distribution system; and full set of technical specifications and contract documents.
Client: Metropolitan Water District of Salt Lake & Sandy
Bowen Collins & Associates provided a full scope of engineering and program management services to MWDSLS for the $300 million Metro Water Project. Project facilities included a new 70 million gallon per day Point of the Mountain Water Treatment Plant, expansion of the existing Little Cottonwood Water Treatment Plant, new finished and raw water reservoirs ranging in size up to 40 million gallons, a new 10,000 horsepower finished water pump station, and over 15 miles of new 48-, 60-, and 84-inch welded steel pipeline (Point of the Mountain Aqueduct) connecting the new facilities. From early conceptual planning stages through startup of the new facilities, BC&A assisted MWDSLS with master planning services, capital cost and budgeting analysis, conceptual design, management of final design services, construction management and overall program management of this critical infrastructure project for the Salt Lake Valley.
Client: Ashley Valley Sewer Management Board
Due to high ground water and deteriorating pipe material, the 500 South Sewer Line in Vernal was experiencing significant infiltration. The sewer line was also reaching its hydraulic capacity. Thus the Ashley Valley Sewer Management Board, who owns and maintains the sewer line, requested BC&A’s services for the design of a replacement sewer line. The sewer line replacement project included over 11,000 linear feet of SDR 35 PVC pipe ranging from 15-inch to 18-inch pipe. The pipeline was constructed within congested city streets, with deep excavations and unstable soils. The new pipeline was constructed along the existing alignment thus bypass pumping of the sewer flows was required for construction of the new pipeline. The high ground water also required significant dewatering and excavation stability measures. This project was constructed for approximately $2.1 million.
SLC Sewer Master Plan
Client: Salt Lake City Public Utilities
Salt Lake City retained BC&A to complete a Sewer Master Plan and Asset Management Assessment for its sewer system which consists of approximately 640 miles of pipe, 8,500 manholes, and 33 lift stations. This project included researching and recommending a GIS-based hydraulic model for long term hydraulic modeling of the City’s collection system. The performance of the system was then evaluated and model results were used to identify existing capacity problems as well as projected future deficiencies. The BC&A team included both skilled computer modelers and experienced sewer system design experts. This combination allowed us to identify and evaluate a broad range of solutions and select those improvements resulting in optimum system performance. Costs estimates were prepared for the optimized improvements and an implementation plan was developed.
The Asset Management portion of this plan involved condition and consequence of failure assessments of the City’s existing system to identify critical areas for risk exposure. It also included an evaluation of Salt Lake City’s current design, maintenance, and data collection practices and making recommendations for improving current practices to support future asset management activities. The final asset management plan included development of a decision support system to aid with the City in prioritizing annual rehabilitation and replacement projects.
One unique component of this project was the inspection of approximately 28,000 LF of Salt Lake City’s larger sanitary sewers using the Cleanflow System. This project represented the first use of this technology in the United States and included the collection of laser/sonar/cctv information. The use of these three technologies provided a most comprehensive understanding of the sewers existing condition than could be obtained using other previously available technologies. The sonar system provided condition assessment for the pipe under the water line while the laser and CCTV data helped provide information for the assessment for the sewer above the water level. The sonar information enabled Bowen Collins to determine the amount of debris in each of the sewer segments. It also helped hydraulic modelers to more accurately understand potential capacity issues. Information collected by a laser enabled very precise measurements of the existing pipe. These measurements enabled the owner and engineers to know exactly how much of the pipe wall was missing.
Westside Interceptor and Lehi Outfall Rehabilitation
Client: Timpanogos Special Service District
Due to high levels of Hydrogen Sulfide gas, caused by shallow sewer slopes, long force mains, lift station discharges and flat design slopes, the 60” Westside Interceptor and 54” Lehi Outfall lines of the Timpanogos Special Service District experienced heavy corrosion of the existing reinforced concrete pipes. Together with a sub-consultant, BC&A completed an Odor and Corrosion Study of the existing lines, which identified the sources of the hydrogen sulfide gasses and the potential remedies. One the recommended remedies included the full structural rehabilitation of the existing pipes in the areas of greatest corrosion by the Cured-in-place pipe (CIPP) process. A trenchless solution was pursued given the size and depth of the existing pipes, the limited right-of-way and the extremely high groundwater levels in the area. Trenchless construction also shortened the construction schedule, simplified the proposed work and greatly reduced the impacts on adjacent property owners, local streets, and cities. Two separate sites were identified for the rehabilitation effort. As the existing pipes had to be taken out of service while the rehabilitation work took place, the project also included two bypass pumping setups with a capacity of nearly 11 mgd, of which, one of the setups included four separate suction points in order to intercept all flows entering the project pipeline. Due to the size of the existing pipes, the CIPP liners had to be shipped to the site dry and wetted out with the thermosetting resin immediately prior to inversion into the host pipes. In addition to setup and testing of the bypassing pumping systems, the project included the pre-lining cleaning and inspection of the existing pipes, installation and curing of the CIPP liner, post-lining cleaning and video inspection and rehabilitation of 11 associated manholes. Initial cost estimates for the project indicated a potential project cost of nearly $2.5 million. Final construction costs are anticipated at $1.5 million
The rehabilitation project included work in four distinct political jurisdictions, including work in easements on private property and within public rights-of-way. BC&A coordinated with all affected jurisdictions and property owners before and during the work to ensure a smooth project with as little conflicts as possible. Coordination included negotiating temporary construction easements, identifying local jurisdictional traffic control and restoration requirements, and preparation of press releases and notification flyers for local residents.
Client: South Valley Sewer District
The South Jordan Pump Station (SJPS), located in the River Front Business Park in South Jordan City, will pump waste water from the District’s collection system to the Jordan Basin Water Reclamation Facility located 3.5 miles south of the pump station. It is designed for an initial peak capacity of 15 MGD and a build-out peak capacity of 50 MGD. The structure will be a reinforced concrete, masonry block and stone veneer building with a metal roof. The project includes installation of two in-channel grinders, four 125 HP non-clog submersible pumps located in a dry pit, mechanical piping, plumbing, indoor odor control system, protective coatings, and HVAC systems.
The project also includes installation of electrical power distribution including motor control centers, diesel-fired 750 kW electrical generator, automatic switches, primary electrical switchgear, supervisory control and data acquisition, telemetry, electrical wiring, lights, fire alarm system and other communication systems.
Due to its location in a business park, the District and local city leaders were very concerned about the control of odors that can be problematic at such facilities. To address and mitigate odors generated by the sewer collection system, this project includes an indoor odor control system consisting of a ventilation systems, make-up air units, and a biofilter.
Civil site work included deep excavation in high ground water conditions, dewatering, subgrade preparation, miscellaneous civil structures such as sewer diversion structures, sewer manholes, large diameter sewer pipe, final grading, landscaping and parking lot construction.
Integral to this project, was the design of the twin 42” O.D. HDPE force mains that carry the wastewater from the lift station, 3.5 miles south, to the new Jordan Basin Water Reclamation Facility along the Jordan River corridor. Design of this force main required coordination and permitting with multiple property owners and local, state and federal agencies including Salt Lake County, Riverton City, South Jordan City, Draper City, State of Utah and the Army Corps of Engineers. The project included alignment analysis and selection, right-of-way/easement acquisition, the horizontal and vertical design of the force main, design and permitting of two crossings of the Jordan River, design and permitting of two major arterial road crossings, wetland permitting and restoration and design of seven air release and vacuum breaker stations.
Client: City Creek Reserve, Inc.
For this sustainably designed, 20-acre, mixed-use development in the heart of downtown Salt Lake City, Bowen Collins & Associates worked closely with a project team that included local and out-of-state consultants to help design a walkable community that will be completed over the next two years. Bowen Collins & Associates specific responsibilities on the project included utility relocation, utility upgrade design, right-of-way coordination, and agency/owner coordination.
Client: Wendover City
Bowen Collins & Associates is the current City Engineer for the City of Wendover, Utah. BC&A staff has served as the City Engineer since 1995. The duties being performed include plan review and approvals for all developments within City limits; all engineering, design and construction services required for projects developed and funded directly by the City; engineering consulting services for the City as required for projects ranging from utility work to road and site improvements; and assistance in applying for funding on future projects by grants and/or loans.
Client: Uintah Water Conservancy District
Uintah Water Conservancy District is planning to rehabilitate 12-miles of open canal into a pipeline. BC&A is conducting an environmental assessment for the Bureau of Reclamation (lead federal agency). The existing canal has several road crossings, turnouts as well as pipe and bridge crossings. The project fieldwork is currently underway and includes wetland delineations, biological assessment and cultural surveys. A finding of no significant impact is expected in the fall 2013 with construction of the first phase in the fall of 2014.
Bowen Collins & Associates provided technical assistance to a confidential client in negotiation and compliance with a CERCLA Administrative Order on Consent for the Bountiful PCE Superfund Site, Operable Unit #2. Bowen Collins & Associates conducted Remedial Investigations (RI) on the subject property involving soil and groundwater sampling and analyses. Bowen Collins & Associates prepared Superfund work plan documents including Sampling and Analysis Plan, Quality Assurance Project Plan, Data Validation Plan, and Health and Safety Plan. The RI work included angle drilling underneath the building to obtain contaminant profile information. Bowen Collins & Associates coordinated all work under the direction and approval of the US EPA Region 8.
Client: Highland City
Bowen Collins & Associates is currently designing a 3.5 acre park that includes parking for an adjacent soccer field, equestrian parking, a corral, passive and active recreational areas and pavilions. The park is located adjacent to the Murdock Canal Trail and residential development. Final design is anticipated in the fall of 2013 with construction beginning in the spring of 2014.