WestLand provided engineering design services for a new raffinate supply booster station. The design had to incorporate flexibility for leach dump elevations rising about 20 feet per year.
The new booster station was designed with two operation modes: one which altered pump operating speed to match tank inflow and maintain a specific tank level; and one to maintain a given flow set point.
The National Park Service is replacing a portion of the 16-mile Trans Canyon Pipeline in Phantom Ranch at Grand Canyon National Park. The only source of drinking water for all of the Grand Canyon Park facilities, construction of the Trans Canyon water system began in 1965, was nearly destroyed by a flood in 1966, and was completed in 1970. The Silver Bridge, which crossed over the Colorado River, serves both as a pedestrian bridge for hikers, and as a support for the Trans Canyon water line.
The aging existing pipeline is constructed of aluminum pipe that over the past decade has suffered numerous leaks, fissures and breaks.
WestLand is acting as the NPS Construction Manager Representative (CMR), providing onsite inspectors to oversee the installation of a new 8” Schedule 80 steel pipe designed and constructed for operating pressures of 740 psi.
The pipeline is so remote that whenever there is a break, there are only two ways to get to it: mule train or helicopter.
WestLand's inspectors have to hike in and out of the canyon, where they camp during their inspection stints. Each stint lasts for nine days–one day to hike in, seven days at the camp, and one day to hike out.
WestLand provided engineering services and complete construction drawings for slip-lining and manhole base design details and assisted in producing extensive flow management plans.
The project area encompassed densely populated 50-year-old neighborhoods, an elementary school, a popular fitness center, a busy animal shelter and a portion of “The Loop” shared-use trail.
Using an innovative combination of cured in place pipe (CIPP) and slip-lining techniques rather than excavating and replacing the large-diameter lines, the CMAR team was able to complete the project three months ahead of schedule, under budget, and without major disruptions to the public including zero interruptions to existing services.
This is the first of three major projects that will rehabilitate 14 miles of large-diameter sewer pipe and construct a connection across the Rillito River – an investment that will extend the life of the community’s wastewater facilities by more than 50 years.
The Town of Marana applied for federal funding for the construction of a new health services facility. WestLand conducted a full range of environmental studies, including completing a cultural resources survey and report and obtaining clearance from the SHPO for this project.
WestLand prepared an EA in accordance with NEPA guidelines. The report identified the potential impacts to the environment associated with the construction of the MHC facility within the framework of the cited Health Resources and Services Administration (HRSA) guidance, and followed NEPA guidance for projects seeking funding under the American Recovery and Reinvestment Act, signed into law February 17, 2009.
WestLand evaluated and designed solutions for several critical areas of the Moly Concentrator for bottlenecks and limitations.
Once bottlenecks were identified, WestLand developed design solutions and detailed design plans for construction of the system upgrades.
The evaluation included a hydraulic study where WestLand developed system models and performed slurry flow calculations.
The evaluation and design included a wide variety of slurry pump stations, pump boxes, distribution boxes, pipes, and other equipment.
Tucson Electric Power (TEP), a Unisource company, contracted WestLand to provide a fast-track route and property analysis for a planned 138-kV transmission line connecting the DeMoss Petrie substation to the Tucson substation in central Tucson.
The approach to this site selection analysis relied heavily on customized modeling and WestLand’s GIS analysts working closely with technical experts in engineering, property acquisition, and environmental permitting.
The results of the evaluation provided TEP with the tools to graphically indicate where new right of way acquisitions (full takes or easements) were required and the costs associated with obtaining property rights for the project. The GIS system created for this project was used to produce detailed maps for conveying the restrictive aspects of each alignment during public stakeholder meetings and Arizona Corporation Commission Line Siting Committee hearings.
Once the final route was selected, WestLand archaeologists conducted a cultural resources survey to identify the archaeological sites or significant historic resources that might be adversely affected by the proposed construction and to help project designers minimize impacts to significant cultural resources. The successful completion of this project demonstrates WestLand’s ability to perform multiple services on linear projects in an urban environment, including mapping, cartography, property, cultural resource, and natural resource planning within a GIS framework.
WestLand provided a detailed design of two new steel headers, a sub-header, and a bypass inside an existing mine building. The project included design of 32 connections to the existing ball mills with new hydraulically actuated slurry knife gate valves and associated hydraulic piping.
The construction sequencing was carefully designed to require no mill downtime, and to allow the existing and new headers to be operational simultaneously during construction.
WestLand designed upgrades for three existing Pregnant Leach Solution pumping stations and associated pipeline.
The design includes two pumping stations, a floating barge pump, and approximately 3 miles of HDPE pipeline.
TProject tasks included detailed hydraulic design, low voltage electrical and VFD design, process and instrumentation diagrams, medium-voltage switchgear design, structural and geotechnical design, surge analysis, detailed cost estimates, detailed construction specifications, hydraulic flow diagrams, a detailed HAZOPs analysis and report, and a hydraulic analysis of the existing pump system.
Due to the highly corrosive nature of the pumped fluid, significant amounts of detailed engineering and vendor coordination were required to prevent corrosion and to minimize costs.
WestLand conducted biological and archaeological site evaluations at specific historical underground mining features within AML sites at four units of the NPS in Arizona: Grand Canyon National Park, Saguaro National Park, Organ Pipe National Monument, and Coronado National Memorial.
The closure project, designed to restrict human access to abandoned mine openings with identified health and safety risks and/or high level of wildlife use while minimizing impacts on wildlife (mainly bats) and significant cultural resources, was funded by the federal government under the American Recovery and Reinvestment Act.
Deadlines for funding availability necessitated a quick turnaround, in this case less than six months. Because of WestLand’s large staff and efficient field methodologies, all field tasks and reports were completed within the prescribed schedule.
Working with Tucson Unified School District, Tucson Parks and Recreation, the Davidson Elementary School administration, and the Davidson students, WestLand oversaw a participatory project planning process that lead to the creation of the Davidson Education Garden Master Plan.
The master plan includes the education garden, cultivation garden, pathway system, new all accessible play structure and an exercise path with PAR stations.
Following the approval of the Master Plan, WestLand was prepared the construction documents for the entire plan to be constructed on the Davidson Elementary School grounds. Initial funding allowed the construction of the education garden and play structure portions of the plan.
The Davidson Education Garden includes a meandering pathway system with teaching ramadas, seating areas, wildlife watering holes and areas for different types of plants and plant communities.
The main garden area features a Sonoran desert area, a cactus and succulents of the world area and an area with plants that attract birds, butterflies and other wildlife.
Students worked with a project artist to create tiles that have been incorporated into the masonry work throughout the project. The new play area is fully accessible by wheelchairs that can roll into the structure and participate in a number of activities.
WestLand designed a well field and associated infrastructure for a groundwater mitigation project to intercept impacted groundwater and deliver it back to the plant site. The project consisted of the site and equipping design for 19 new groundwater wells, an open-top welded steel reservoir, a closed-top welded steel reservoir, a booster station, surge tanks, and 13 miles of HDPE pipeline.
The project also included medium-voltage transmission, distribution, and switchgear design, low voltage electrical, instrumentation and control design for wells and booster station sites, Pima County and Union Pacific Railroad permitting assistance, surge analysis, detailed cost estimates, environmental permitting, and hazardous operations (HAZOPS) evaluation.
The Chevelon Creek Wildlife Area restoration project is a 668-acre AGFD river restoration and emergent wetland project on property acquired by AGFD for migratory waterfowl habitat. It is located southeast of the confluence of Chevelon Creek and the Little Colorado River.
The project encompasses a unique wildlife area in that Chevelon Creek is one of the few perennial streams in northern Arizona. The baseflow is consistent even through drought years and is probably why the area has numerous archeological sites showing evidence of historic Native American settlement.
As with many riparian and wetland areas in Arizona, this wildlife area is infested with tamarisk that has drastically reduced biological diversity by outcompeting native vegetation and increasing the salt content of surrounding soils.
For multiple reasons, including the decay of the man-made impoundments, equipment disrepair, and tamarisk encroachment, the CCWA was no longer a considered as a healthy emergent wetland area.
Westland designed and prepared construction documents for the restoration of approximately 1 mile of Chevelon Creek and 120-acres of emergent wetland.
Key points of the project development include geomorphology investigation, hydraulic analysis, emergent wetlands hydrology, vegetation surveys, and CWA Section 404 permitting.
WestLand provided engineering conceptual design, site inspections, cost estimation, compliance measure recommendations, and ADEQ processing support for the Johnson Camp Mine potable water system. WestLand has extensive experience with Public Water System through ADEQ and assisted the client with activation, compliance measures, and provided certified operator services.
WestLand also developed a complete Drinking Water Manual for the on-site operators to use that describes the system operation, testing, and compliance measures that need to be followed in operating an ADEQ regulated potable water system.
WestLand provided design and construction period services for this sewer lift station project to serve the Eagle Crest development in Pinal County. The project was designed per PCRWRD standards and requirements for acceptance into the PCRWRD system.
The project included duplex submersible pumps in a lined and coated pre-cast concrete wet well, above ground discharge manifold, backup power generator, grit manhole, chemical injection system with HDPE tank and metering pumps, aerated wet well, and telemetry equipment and controls for PCRWRD monitoring and control.
WestLand engineering staff provided the engineer's certification of construction for the project.
WestLand contracted with the Town of Prescott Valley to prepare a final design report and plans for the construction of recharge basins located near the confluence of the Agua Fria River and Coyote Wash in Prescott Valley, referred to as the North Plains project.
The design report and plans for the basin recharge of approximately 4,000 acre-feet per year were prepared in part to fulfill the Arizona Department of Environmental Quality Aquifer Protection Permit and the Arizona Department of Water Resources Underground Storage Facility permit applications.
Final design report and plans included site grading, hydraulic modeling, piping, and reclaimed water delivery to 22 recharge basins.
Pressure control valves, Supervisory Control and Data Acquisition (SCADA), and Solar Power were incorporated into the project design. WestLand provided final design plans and oversaw the construction of the first phase recharge basins.
WestLand prepared engineering design plans and specifications for a dewatering project to remove over 6 billion gallons of water from two open pits.
WestLand designed a series of pumping stations including a barge pumping system, two in-line booster stations, and three open-system booster stations.
The project also included the equipping of a water-filled ventilation shaft with a vertical turbine pump and the design of 7 miles of steel pipeline, including 0.5 miles to be mounted on an existing conveyor system to overcome the construction challenges associated with steep slopes surrounding the pit.
The project also included instrumentation and control design, structural and geotechnical design, surge analysis, detailed cost estimates, and environmental permitting.
WestLand designed a new 350,00-gallon storage tank and booster station to replace the existing tank and pump station that deliver potable water for Silver Bell Mine’s potable and process water needs.
The project also included the design of new motors and discharge manifolds for each of the three existing wells which supply water to the booster station.
The new booster station consists of two vertical turbine can pumps, which pump from the 350,000 gallon tank to another tank and booster station approximately 7 miles away.
WestLand developed a system-wide water balance and water process flow diagram for the Ray Mine Complex located near Kearny, in Pinal County, Arizona. The services provided included data collection and organization, system evaluation, development of figures, and creation of a water balance model.
The model provides a wholistic view of water transfer throughout the operation and is based on meter data, environmental conditions, calculations based on manual parameters, and remaining balance summations. The model can be used to predict the effect of a variety of operational or external circumstance and to project future flow volumes
WestLand developed and implemented a Booster Pump Energy Efficiency Testing Program for the City of Tucson Water Department. The primary goals of this project were to perform energy efficiency evaluations of individual booster pumps, implement upgrades at Tucson Water booster stations, and develop a sustainable Booster Energy Efficiency Program for Tucson Water’s future use.
WestLand’s evaluation resulted in the identification of energy saving opportunities, which were further prioritized based on financial analysis (payback-period considerations). It was anticipated that the top priority sites, referred to as the “low-hanging fruit”, would generate the greatest improvement in energy usage for the lowest up-front investment.
As part of this comprehensive program development for Tucson Water, WestLand performed testing at 24 Tucson Water booster stations (about 20 percent of all Tucson Water booster sites), which constituted a total of 105 pumps.
The pumps tested included horizontal end suction, vertical turbine, and submersible pumps ranging from 5 to 350 horsepower in size. The data collected from efficiency testing included flow rate, suction and discharge pressures, and electrical data such as amperage, voltage, power, and power factor.
Upgrades that were identified to improve booster efficiencies included replacing old and aging pumps and motors, performing pump and motor reconditioning, installing variable frequency drives, minimizing head loss through replacement of undersized manifolds, and adjustments in system operation.
Additional recommendations for future work included guidelines for appropriate use of premium and super-premium efficiency motors, and performing system-wide analysis to review operational criteria.
Based on testing results and energy efficiency projections, it is calculated that the total upgrade cost of approximately $166,000 will result in approximately 615,000 kilowatt-hours of annual energy savings and $52,100 of annual cost savings, resulting in an average payback period for the upgrades of less than four years.
This project was funded through a DOE Energy Efficiency and Conversation Block Grant of the DOE under the American Recovery and Reinvestment Act. The final results far exceeded the EECBG project goals.
WestLand provided construction management of all wet utilities, including working with the Navajo Nation Parks and Recreation Department to hire a competent contractor, overseeing construction, and approving pay requests and change orders.
Grading included the parking areas for the 160-room View Hotel and approximately 3,000 feet of access roads for the park and the wastewater treatment area.
The project required significant coordination with the electrical facilities in the area, including the Navajo Tribal Utility Authority and coordination with several state and tribal agencies, including the Arizona Department of Transportation, Utah Department of Transportation, Bureau of Indian Affairs, Navajo Nation EPA, US EPA, and the Navajo Nation Natural Resources.
WestLand designed several thousand feet of water and sewer mains, a new well pump, and an 8-mile water main to transport water from the well to a 252,000-gallon water storage tank coordinated by WestLand.
WestLand provided infrastructure design of onsite water treatment and distribution, onsite wastewater collection and treatment, roads, parking, and drainage conveyance facilities for the new View Hotel, gift shop, administration facility, maintenance facility, and staff housing at the Monument Valley Tribal Park.
WestLand reviewed construction plans and specifications for the proposed utilities for the Twin Arrows Resort and Casino for adherence to regulatory specifications, details and constructability.
WestLand also provided onsite construction inspections and oversight during the construction activities for all utilities under the jurisdiction of the NTUA.
WestLand worked with the City of Bisbee to obtain a Water Infrastructure Finance Authority (WIFA) Planning and Engineering Grant to fund this sewer lateral pilot study.
The City obtained additional grant funding from Border Environment Cooperation Commission (BECC) for the project, and provided a significant local match in the form of in-kind services for sewer lateral mapping and closed-circuit television (CCTV) review of the sewer laterals.
The focus of the project was review and evaluation of the condition of existing public sanitary sewer lateral serving historic Old Bisbee. The project was needed because of the failed or failing sewer laterals, resulting in frequent emergency responses to sanitary sewer overflows (SSOs) and excessive exfiltration.
The final report from the project will serve as the basis for the evaluation, design, and construction associated with sewer lateral improvement projects.
WestLand provided pro bono, preliminary planning and design services to the Tohono O’odham Nation for the area bounded by the Nation’s administrative offices, the Mission School, San Xavier Mission, the Elder Center and Planning offices on the Reservation near Tucson, Arizona.
This area of the reservation accommodates many tourists visiting the Mission as well as tribal members seeking public services. Existing conditions create conflicts between vehicles and pedestrians. Parking and drainage are also existing issues.
Westland looked at vehicular and pedestrian circulation, existing topography, utilities, existing drainage, visual impacts, and existing construction materials to propose street, parking and hardscape improvements that calm existing vehicular traffic while providing safer and more defined pedestrian circulation routes.
The proposed improvements utilize construction materials that repeat those used in architecture and public spaces existing in the area.
Two options were proposed. One option recommended improvements with the existing buildings remaining as they are. The Second option recommended improvements assuming a new administrative complex building and associate parking area.
Tucson Electric Power is conducting a multi-year effort to clear vegetation from beneath their twin 345 kV lines that run from the San Juan Basin in New Mexico to the town of Vail, in Pima County, Arizona.
The segment between the San Juan Basin and the northern boundary of the Zuni Indian reservation is located within the outer boundaries of the Navajo Nation. However, portions of the project also crossed a portion of the Nation that is checker-boarded with BLM and New Mexico State Land Office (NMSLO) property. Because the original cultural resources survey was done prior to the Navajo Nation cultural resources regulation, the Navajo Nation Historic Preservation Department (NNHPD) requested that the line be re-surveyed to meet modern standards and tribal regulations.
WestLand conducted the survey and prepared a monitoring plan that was accepted by the Navajo Nation, the NMSLO, and the BLM Albuquerque field office. WestLand’s monitoring crews included local Navajo archaeologists and worked closely with the vegetation management crews to identify cultural features on sites that were cleared with hand cutting crews.
This task of the project was particularly important because many historic period Navajo cultural features, such as corrals and brush fences, incorporated living trees. WestLand negotiated an agreement with the NNHPD that included preservation in place of most of these features and careful cutting of those cultural trees that posted a fire threat to the transmission line. The relationship built by WestLand’s collaborative efforts with the Navajo Nation led to a workshop on tribal cultural resources law led by an NNHPD compliance officer at the TEP facilities.
The Town of Marana contracted WestLand to provide cultural resources and environmental surveys for a 10-mile road widening project that included easements controlled by the Arizona State Land Department (ASLD), Pima County, and the Town of Marana.
The project included a Class I and Class III cultural resources inventory survey, an ASLD Native Plant Inventory, delineation of jurisdictional waters for compliance with the CWA, and a Biological Assessment to comply with the Endangered Species Act and completion of a Phase I Environmental Site Assessment (ESA).
All field surveys and report preparations were conducted by WestLand’s in-house staff. WestLand coordinated with agency personnel in the completion of these resource studies.
WestLand designed the Miraval wastewater treatment plant, to treat wastewater from the Miraval resort to A+ quality for reuse or recharge. The project was a design-build delivery with contractor WRI Construction.
The resort has somewhat concentrated waste with high BOD and nitrogen loading. In addition, flows change drastically based on the season.
The WWTP consists of primary treatment to remove large solids, secondary treatment through anoxic and aerated zones, and tertiary treatment using sand filters and chlorination/dechlorination.
Because of the high nitrogen loading, the WWTP includes the ability to add carbon for denitrification.
The WWTP also includes a way to short-circuit the secondary effluent – reducing the effective size of the plant – for off-season flows.
WestLand provided all design and permitting services, for this project to replace well capacity used for cooling and drinking water at the APS Cholla Power Plant in Joseph City, Arizona.
WestLand provided a routing study, detailed hydraulic modeling, engineering design, and construction oversight of 14 new production wells and 8,500 linear feet of pipeline ranging from 12 to 42 inches in diameter. Twenty three individual ADEQ drinking water approvals were acquired by WestLand for the project.
The contract was let as design-build and all aspects of the project construction, with the exception of drilling, were completed by contractor WRI Construction. The WestLand team provided the client with all of the technical resources to execute the complex project in a short timeframe.
The collective experience of the design and construction teams allowed WestLand and WRI to scope the project in a manner so that no change orders were required. The overall project was designed, permitted, inspected, constructed, and certified in just over 400 days, meeting the project schedule.