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Water Quality

    F.E. Jordan Associates' capabilities extend to a number of water quality areas. These include base data collection and analysis, analysis of existing systems, urban stormwater runoff analysis, analysis for wastewater treatment plants and other facilities. We have used sophisticated computer programs as well as other more routine methods to assist us in our project studies.

    JA is able to offer its clients a widespread, diversified and in-depth analysis of water quality related studies. Our data collection services, particularly in connection with wastewater treatment plants, include stream surveying, utility locating, and sampling for biological and chemical determinations. Before any data is collected, however, JA team members begin by analyzing the specific data needs of the project. After a determination of the availability of other data has been made, then a specific data collection or monitoring program for that specific project is designed. In this way the client obtains the maximum amount of useable data within the constraints of time and resources available.

    Water quality considerations as a result of urban runoff have begun to demand attention as a result of rapid and intensified urban development. Land use, development, and runoff and water quality interrelationships are examined and evaluated. Jordan/Avent & Associates has been in the vanguard of firms with the expertise and experience to examine these problems. We have used many computer models such as SWMM, STORM, HEC-2, and HYDRA. Our engineers developed a model (QUAL) to simulate urban drainage systems, runoff quantities, and water quality effects.

    The firm's urban stormwater runoff analyses services include the delineation of water quantity and quality problems, preparation of drainage system mapping, developing drainage design criteria, conducting complete field monitoring programs for quantity and quality and calculating design flows. Also, we determine the extent of water quantity and quality problems throughout the urban area and make predictions of pollution loads for future years.

    In addition to our expertise in water quality analysis, the staff at JA, being multi-disciplined, also has a broad and varied background in management strategies. In addition, we are capable of proposing imaginative and effective non-structural solutions involving land use, zoning, staging of development, ordinances, modification and maintenance of existing facilities, to arrive at a practical and successful solution for our clients.


Mid-Willamette Valley Urban Runoff Management Study

Salem, Oregon

    This study involved Urban Stormwater Run-Off Analysis to assess the impact of runoff quantity and quality by monitoring storms, developing hydrographs and pollutographs, developing a forecasting tool, and projecting pollution loads for the Salem, Oregon Urban Area. The field monitoring of storms included measurement of flow and collection of water samples for analysis of water quality constituents for use in the modeling phase of the work. This project required the use of the computer program "HYDRA" for runoff analysis. A hand modeling technique was developed, calibrated and used for analyzing projecting pollution loads.


Portneuf River Water Quality Model - Southeast Idaho Council of Governments

Salem, Oregon

    We used a Water Quality Model to predict nutrient loads and other water quality constituents for a 52 mile portion of the Portneuf River near Pocatello, Idaho. This model, originally developed by the Corps of Engineers was calibrated and used for this study.


Lane County Areawide Urban Runoff Study, Lane Council of Governments

Eugene, Oregon

    In the Lane County Urban Stormwater Runoff Analysis, JA analyzed runoff quality and quantity characteristics, determined geological boundaries of contributing areas to urban storm runoff loads and developed a forecasting tool to project pollution loads from Eugene/Springfield, Oregon. This study required a field monitoring program to evaluate water quality constituents, and the calibration and use of the computer model "STORM" developed by the Corps of Engineers.


Genesee Park, Seattle Parks Department

Seattle, Washington

    F.E. Jordan Associates, Inc. was asked by the Seattle Parks Department to provide a ground water analysis for the expansion of Genesee Park. We provided subsurface analysis, chemical and water quality analysis for conversion of this 54-acre sanitary landfill to a recreational park.

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