Category Archives: Water Infrastructure and Treatment Design

South Coast Water District Launches Innovative Water Harvesting Facility

The project taps a new water source, reduces urban run-off, improves water quality, and converts an irrigation system from potable to recycled water. In a collaborative effort with the County of Orange and the City of Laguna Beach, South Coast Water District is constructing an innovative water harvesting and treatment facility that will have multiple

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Pre-Procurement Strategies for Wastewater Projects

Pre-selection, pre-approval, and pre-purchase of equipment and materials are three procurement methods that, when used correctly, can shorten construction schedules, control costs, ensure quality, and reduce the risks of conflicts and claims during construction. Each approach needs to be carefully administered within specific exceptions to California’s Public Contract Code governing competitive bidding practices for public

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How Pre-Procurement Can Overcome Constraints on Wastewater Infrastructure Projects

Dudek engineers successfully administered variations of pre-procurement processes to shorten construction schedules while controlling costs and project risks on three recent wastewater infrastructure projects. Focusing on unique project needs, Dudek used three progressively complex pre-procurement methods: pre-selection, pre-approval, and pre-purchase of equipment and materials. Each approach was carefully administered within specific exceptions to California’s Public

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Grant Funding for Plant Upgrades Through Fast-Tracked Design and Construction

City officials of Guadalupe, CA recently completed the successful upgraded of its wastewater treatment plant, securing state grant funding for the project by adhering to a tight completion schedule and using innovative procurement methods. Dudek engineers assisted the city by designing the major plant upgrade, administering the $4.5 million Proposition 50 grant, and assisting during

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Selecting Numerical Modeling Alternatives for Water Projects

A summary and guide for regulatory, development and environmental stakeholders. Consulting engineers and environmental scientists are frequently asked what type of modeling is required to achieve a project’s goals from a regulatory, design or habitat standpoint. The answer is integrally tied to the project setting as well as the project’s objectives. This article explores some

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Dudek Helps in Wastewater Siphon Replacement Project

The City of Laguna Beachwas concerned about a siphon section of its primary wastewater transmission main that was constructed of steel pipe. They were also interested in evaluating the serviceability of contiguous fiberglass pipeline sections. The fiberglass pipeline had changed ownership, and records of the material type and fabrication methods were lost. This made it

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Turning Around an At-Risk Treatment Facility

A small wastewater treatment facility facing regulatory fines and inefficient operations took an innovative approach to corrective action that avoided fines and leveraged existing facilities to improve operations. The Los Ranchos Mobile Home Park’s 100,000 gallon per day (gpd) wastewater treatment plant was plagued by constant odor complaints, failing percolation ponds and occasional spills. The

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Rescuing Wastewater Facility Stranded Capacity

Finding “low-hanging fruit” at wastewater facilities to increase capacity and improve operational reliability can pay significant benefit by maintaining service levels without committing to large-scale capital expenditures. “The key is seeking out inexpensive adjustments to current operating facilities that may allow postponing, changing, or eliminating major projects and expenditures,” said Bob Ohlund, PE, Dudek’s vice

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Using Trenchless Technology for Sewer Upgrade

The City of Carlsbad converted two old sewer lift stations to facilitate gravity conveyance to an expanded collection system to reduce operations and maintenance expenses associated with the old lift stations. Horizontal Directional Drilling (HDD) was selected as the preferred method of construction for installing the new gravity flow pipeline stations because of cooperating soil

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Innovative Design Corrects Sewer Siphon Odors

After receiving resident feedback that its sewers were emitting odors, Orange County Sanitation District (OCSD) launched an investigation into the effectiveness of its sewer siphons’ ventilation. While the Fountain Valley, CA district has a proactive siphon cleaning and maintenance program, the number of odor complaints in the vicinity of siphons indicated they were the problem.

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