Water
Minnehaha Community Water Corp. EROS Booster Station
Brandon, SD
While Minnehaha Community Water Corporation (MCWC) prepared for their third and final Lewis & Clark Regional Water System (L&C) connection in the southeast portion of their distribution system, it was determined that the area would use significantly less water than their original 1.1 million gallon per day (MGD) allocation. MCWC tasked Banner with determining a way to use more L&C water from the east connection. Since the east L&C connection was made in the lowest hydraulic grade line (HGL) service area in the system, water would need to be pumped north into a higher HGL service area. An existing control valve vault site was chosen as the location for the new booster since the existing control valve was not needed in the system. The booster station is equipped with two 50 Hp end suction pumps, with provisions for a future third pump. The booster station capacity is 750 gallons per minute (GPM), and could increase to 1,000 GPM with a third pump. A unique feature of the booster station is a reverse flow control valve, which allows MCWC operations staff to gravity flow water south in the event of an emergency in the L&C system.
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Transmission Main Rehabilitation: Water Transmission Structural Relining
Sioux Falls, SD
The City of Sioux Falls selected Banner to conduct a study on rehabilitation methods of unlined metallic water transmission mains. The existing unlined iron pipe (cast or ductile) can develop deposits, contributing to red water issues. The operations staff have had a few emergency repairs on the large diameter transmission mains. A pilot project was completed near the City’s Water Purification Plant. The water transmission mains were located in hard to reach locations: some ran through the Maguire Iron yard, beneath railroad tracks, under an electrical substation, in close proximity to the City's ground storage reservoir, and in the Airport. This made standard open-cut replacement less than ideal for the project. After evaluating alternatives, a Class III Structural Spray in Pipe Liner (SIPP) process was selected for the construction method, which included a thorough cleaning of the pipe interior to remove deposits and nodules to provide a smooth, clean surface. A polymer lining material was then adhered to the smooth pipe interior. In total, over 3,000 feet of 20”- and 16”-diameter water transmission mains were rehabilitated using SIPP during the project. This was the first project of this type performed in South Dakota.
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East Rapid City Water System Expansion
Rapid City, SD
Banner was selected by the City of Rapid City to provide professional engineering and surveying services for a major expansion of the municipal water distribution system located east of the current city limits near the Rapid City Regional Airport. The upgrades provided clean drinking water to existing public systems with repeated EPA drinking water violations, and offered service to adjacent residences that had been on public or private well systems. The City also anticipates serving new demands from future growth needs with these improvements, including providing clean drinking water to the Rapid City Water Reclamation Facility.
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Lewis & Clark Regional Water System Tea Reservoirs & Pump Station
Tea, SD
The Tea Reservoirs and Pump Station are an integral part of the Lewis & Clark Regional Water System (L&C). Treated water is pumped from L&C's water treatment plant near Vermillion, SD into the main 54”-diameter, 49.2-mile trunk line that delivers water to member systems and into two 7.5-million gallon reservoirs located west of Tea, SD. A booster pump station is also located at the Tea Reservoir site.
The Tea Pump Station delivers water into two 36”-diameter pipelines. One 36”-diameter pipeline is routed to the north to deliver water to the west side of Sioux Falls and other member systems, while the second 36”-diameter pipeline extends to the east to deliver water to the south side of Sioux Falls and other member systems located near Sioux Falls and into the 85th Street Tower. The 85th Street Tower is a 3-million gallon elevated water tower. Water flows through the 85th Street Tower to the pipeline that extends eastward into Iowa and Minnesota.
Two 7.5-million gallon prestressed concrete reservoirs with a height to overflow of 48' were constructed at the site. Space was reserved for a third reservoir that could be added in the future. The reservoir contract included a significant length of large-diameter (36" and 54") piping and a reservoir mixing system. A main line booster pump station was also constructed on the site. The pump station included eight 4,700 gallons per minute (350 hp) high-service vertical turbine pump, variable frequency drives, surge tank, piping, valves, chemical feed systems, and controls.
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Big Sioux Community Water Brant Lake Water Treatment Plant
Egan, SD
The Big Sioux Community Water System, Inc. is a public water system serving small communities and rural residents of Moody and Lake Counties in South Dakota. The system has been delivering water since 1972, with the Brant Water Treatment Plant in operation from 1986 to 1998 and the present lime softening Egan Water Treatment Plant in operation since 1994. To meet increased water demand at the recreational lake areas—which were on the perimeter of Big Sioux's existing distribution system—during the summer months, Big Sioux decided to build a new supplemental water treatment facility. The new plant is located on the old Brant Water Treatment Plant site, in the vicinity of Brant Lake and Lake Madison. The new water treatment plant allows Big Sioux Community Water to supplement their existing water treatment plant with an additional 300 gallons per minute (GPM) of water with similar water quality characteristics. The new Brant Lake Water Treatment Plant operates by pumping raw water from the Long Lake Well Field to one of three pressure filters located within the new facility. Chlorine is added to the raw water prior to the filters for iron and manganese oxidation and for media regeneration. As the water exits the filters, a portion of it is sent to the nanofiltration unit for further treatment and hardness removal. After the water is filtered through the membranes, it is blended with water treated through filtration alone, chlorinated and delivered to the ground storage reservoir. The high-service pumps then pump water from the ground storage reservoir and into the distribution system.
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Oacoma Water System Pump Station
Oacoma, SD
The Town of Oacoma installed a parallel treated water line into the town to minimize pressure variation during periods of high water use. A new treated water standpipe was also installed to eliminate low water pressure complaints from home-owners located in the higher elevations of town. This was accomplished by installation of a taller standpipe, creating two separate pressure zones. A new pump station was necessary to transfer treated water from the lower pressure zone to the higher zone. The standpipe has the capacity to continue providing fire protection for these customers fed from the higher pressure zone.
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Regional Airport Water Transmission Main Loop
Rapid City, SD
The project consists of approximately 5.7 miles of 16”-diameter pipe extending a second water main out to the airport. This project creates a looped system, increases fire protection at the airport, and will provide water service to the developing area between current City limits and the airport. The project was divided into five separate bid packages. The 5th phase includes rehabilitating a cathodic protection system for a 30”-diameter steel water main from the City’s water treatment plant to downtown Rapid City.
The overall project includes 29,968' of restrained 16”-diameter water main, 1,270' of restrained 12”-diameter water main, and appurtenances including fittings, valves, hydrants and air release/vacuum valves. Portions of the new water main are currently in a pasture, so design had to incorporate considerations for the future arterial roadways and anticipated intersections. Design included preliminary road alignment and grade so that the water main could be appropriately located vertically as well as horizontally. Until future roadways are constructed in pasture areas, access for maintenance is being provided by gravel access roads with appropriately designed drainage features.
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Cattail Crossing
Watertown, SD
The City of Watertown Parks, Recreation and Forestry Department operates and maintains the Cattail Crossing Golf Course. Irrigation water for the course is drawn out of nearby Lake Kampeska. The original intake screen located near shore allowed significant sediment into the system, causing numerous maintenance issues; it was also not deep enough to use during low lake level periods. Banner evaluated several alternatives before recommending a new intake pipe design: 1500 lineal feet into the lake with a low-profile screen to meet South Dakota Game, Fish and Parks (GFP) watercraft clearance requirements. The new 20"-diameter fusible PVC intake pipe is tied into the existing pump station and weighted due to its shallow bury. It is designed to handle up to 2.8' of thermal expansion movement to accommodate water temperature fluctuations. As Lake Kampeska is a fishery habitat, the screen was designed for low maximum allowable velocities to avoid trapping fish against the screen.
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Parker Water Tower
Parker, SD
The City of Parker's water demands have increased over the past several years, exceeding their existing equipment capacity. The City's existing 50,000-gallon water tower was inadequate to continuously provide reliable system pressures, particularly for fire-fighting applications. The new and taller water tower increases system pressures throughout the entire distribution system and provides additional volume to fight fires. Water main improvements were also needed to hydraulically connect the new water tower to the City's distribution system and better distribute water into the system. Banner provided design, bidding, construction contact administration, and construction observation services for the City of Parker’s new 250,000-gallon spheroid style water tower. In addition to the new water tower, this project also included the installation of approximately 500' of 10"-diameter PVC water main, and the demolition of the City’s previous 50,000-gallon water tower.
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Madison Water Treatment Plant Improvements
Madison, SD
The City of Madison owns and operates a conventional lime softening water treatment plant which serves approximately 6,600 people within the City limits. Water is pumped from eleven production wells through a series of 6"- and 8"-diameter pipes to a 12" intake line into the 4.0-million gallons per day (MGD) water plant. Water is then treated and pumped to the distribution system. The water plant was originally built in 1966 with clarification and filtration. Improvements were made in 1996 which included the addition of a second clarifier, a reclaim basin, and a generator. Banner prepared a facility plan which identified several areas for improvement. Recommendations included improvements to the City's clearwell and on-site storage and pumping capabilities; piping inside the water treatment plant and site piping to separate pressures zones (allowing maximum utilization of both existing water towers); installation of an ammonia feed system; filter improvements including an underdrain, an air/water backwash system, and media; and a variable-frequency drive (VFD) on Well #9.
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Mni Waste’ Water Company (MWWC) Water Supply
Cheyenne River Sioux Tribe - Eagle Butte, SD
The Mni Waste Water Company is a Tribally-chartered entity formerly known as the Tri-County Water Association (TCWA), located primarily on the Cheyenne River Indian Reservation. Banner has been providing planning, reporting, and design services since 1994 for improvements and distribution system expansion on the Cheyenne River Indian Reservation and surrounding areas. The first phase of improvements is the MWWC Water Supply Project which includes a 4.4 million gallons per day (MGD) Water Treatment Plant (WTP) and a 35-mile water pipeline from the Oahe Intake to Eagle Butte. An Environmental Report was prepared in conjunction with the Preliminary Engineering Report, and a FONSI (Finding of No Significant Impact) was issued by USDA Rural Development for the 35-mile water pipeline from the Missouri River Oahe Intake to Eagle Butte and Water Treatment Plant. A 10-mile segment of 30"-diameter raw water pipeline has been completed and the construction of the 4.4 MGD WTP is under construction. Also currently under construction is the first 12-mile segment of 24"-diameter Treated Water Pipeline with an additional 13-mile segment planned in later phases. After completion of the new Water Treatment Plant, raw water pipeline, and treated water pipelines, implementation of overall project as recommended (including distribution and storage system improvements and expansion) is expected to exceed $350 million. As part of that distribution phase, a two-million gallon elevated reservoir for Eagle Butte is planned, as are five miles of 24"- and 16"-diameter water mains to connect the first phase to the Indian Health Service complex and water tower on the south side of Eagle Butte.
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Lewis & Clark Regional Water System
Various Locations, South Dakota, Minnesota, Iowa
Lewis & Clark Regional Water System, Inc. was formed in 1990 to provide a critically needed source of quality, reliable drinking water to over 300,000 people in South Dakota, Iowa, and Minnesota. Lewis & Clark represents a unique regional approach to address common problems with area water resources in a more efficient and cost-effective manner than individual members could do alone. Regional water problems include shallow wells and aquifers prone to contamination, compliance with new federal drinking water standards, population and economic growth stifled due to inadequate water supplies, and insufficient resources to replace aging facilities.
The Lewis & Clark project uses the Missouri/Elk Point aquifer adjacent to the Missouri river near Vermillion, South Dakota as its water source. Eleven wells have been developed to date, providing a total pumping capacity of approximately 36 million gallons per day (MGD). The water treatment facility located two miles north of Vermillion, SD provides lime softening and granular media filtration, chlorine disinfection, and chloramination of the treated water. The water system storage facilities currently include the clearwell and pump station at the plant site, two ground storage reservoirs at the City of Tea, SD, and an elevated tank at Sioux Falls providing a total storage capacity of 22.5 million gallons of treated water.
Banner has developed and maintained a hydraulic model of the water system. The model is used to evaluate design conditions for pumping and reservoir operation, water age, and potential water quality changes in the distribution system. The model is also used to determine the rate of turnover in the storage reservoirs.
Banner has been the system engineer for Lewis & Clark since its formation. Banner’s services have included preparation of the Needs Assessment repot, a Feasibility Report, a Final Engineering Report, an Environmental Assessment, and recommendations for operation of the system to maintain water quality under different operating conditions.
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