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Projects
Staff
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Recent Accomplishments |
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First High Reservoir, Baltimore District, Maryland - As part of a three-year Indefinite Delivery Contract with the Army Corps of Engineers - Baltimore District, NCS received its first Task Order to evaluate structural and hydraulic issues associated with the operations of a finished water service main and reservoir, which serve one of the four service areas by the Washington Aqueduct. To supply potable water to more than one million customers, the Washington Aqueduct treats the Potomac River water at the Dalecarlia and McMillan Water Treatment Plants. Finished water from the Dalecarlia Water Treatment Plant is pumped into the First High Reservoir through the First High Service Main. The First High Service Reservoir was built in 1924 and has been repaired several times for structural cracks and leaks. The reservoir has a capacity of 14.5 million gallons. Besides the structural issues, a number of hydraulic issues (such as commissioning of the new altitude valve and its concurrent operations with the first high main surge valves) will be studied as part of the Task Order.
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Washington Aqueduct Sanitary Survey, Washington D.C. - To supply potable water to more than one million customers, the Washington Aqueduct treats the Potomac River water at the Dalecarlia and McMillan Water Treatment Plants (WTPs). At the Dalecarlia WTP, finished water is stored in two clearwells (with capacities of 15 MG and 30 MG) operated in series. In the past sanitary surveys conducted by USEPA, several significant deficiencies have been identified in the area of cross-connection and potential contamination of the drinking water. Typical deficiencies include drain and overflow pipe connected at each other at finished water reservoirs, potential siphon of spent backwash water into finished water, and cross connection of surface wash water and filter wash water. Washington Aqueduct retained NCS to evaluate these sanitary survey deficiencies and recommend the preferred implementation alternative. NCS also prepared detailed conceptual designs, determined feasibility of construction and developed construction cost estimates for these significant deficiencies.
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Well 23 Equipping, Treatment System and Design, City of Rio Rancho, NM - NCS is assisting the City of City of Rio Rancho in designing improvements to equip Well 23 and constructing a new treatment station to reduce TDS, ion and uranium levels. As part of this project, NCS conducted a hydraulic analysis to determine the new total dynamic head, and subsequent pump and motor sizes. Aquifer flow and water quality testing was conducted to determine how the well bore could be modified to improve water quality and minimize treatment costs. A new electrical service is also required.
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City of Rio Rancho Sewer Model Update and Master Planning - NCS assisted the City of Rio Rancho with a sewer model update that includes Geographic Information System (GIS) integration. The City of Rio Rancho would like to utilize the sanitary sewer model for making short and long-term operational and planning decisions regarding the sewer system. NCS was requested to evaluate the current state of the existing model and provide a strategy to achieve this goal. The specific tasks NCS assisted includes: Imported GIS database to create a new model, which is an update to the model used by the City; included verification of elevations through survey; sewer model calibration, with parameters such as flow, velocity and depth measurement at 12 locations in the collection system; geo-spatial allocation of the billing data to load the model; provides training to City staff; and prepared a comprehensive user’s manual. Following a calibrated hydraulic model, NCS is providing the future required backbone infrastructure and facilities for the growing community of Rio Rancho for short and long term capital planning.
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Rio Rancho Well 14 Booster Station, City of Rio Rancho, New Mexico (CORR) - NCS is assisting the CORR with a new 500-gpm (firm capacity) prefabricated pump station that includes centrifugal pumps and SCADA. NCS considered a range of options to select the preferred pump station configuration and location. The booster station will deliver water from Well 14 to the upper zone in the event wells 9 and 13 are not available.
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City of Phoenix, Group C Steel Tank Improvements - In this project three existing water storage steel tanks will be replaced with three new tanks of similar dimensions and three existing storage tanks will be rehabilitated. Also, one new tank of 0.15 MG capacity will be constructed. NCS developed the final drawings and project specifications for the recommended improvements. NCS coordinated in obtaining the agency and regulatory approvals. Construction of phase of this project is intended to begin in August 2011. The City of Phoenix also retained NCS for construction management services.
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