East Side Urban Ditch
The goal of the project was to identify and analyze stormwater management concerns within the study watershed and provide a long-term plan to appropriately address the identified deficiencies. Field work was conducted to locate, catalog, define, describe, and depict existing flow obstructions. Field observations were photodocumented and located using Trimble GPS data collectors. Potential items of concern identified included undersized structures, embankment failures, surface sheet erosion leading to significant silt deposition, erosion at inlet and outlet points, channel profile degradation, sediment deposits and log/trash dams, inadequate vegetative cover, and other deficiencies. A recommendation for action was prepared for each observed condition of concern, including specific information regarding structural modifications, best management practices, and an estimate of the effort and cost required to resolve the condition.
The project team for this drainage study included engineers, hydrologists, and environmental scientists who studied and evaluated the existing condition and proposed improvements to the drainage basins served by East Side Urban Drain and Harper Ditch. During the field investigation, potential water quality issues were noted, photo documented, and geo-located. Potential areas of concern may include both permitted and illicit discharge structures entering the waterways. Where possible, illicit discharges were traced and the source documented for possible enforcement action. Water quality samples, including chemical and biological samples were collected and analyzed. An assessment was prepared for each source evaluating its implications with regard to NPDES Phase II requirements. Additionally, American Structurepoint provided recommendations for appropriate best management practices to address each issue. Potential operational and maintenance issues and costs will be presented, as well. Recommendations included a long-range plan which identified project phasing to proceed in an orderly, logical manner. The recommended work plan provided an implementation plan for the highest level of efficiency, addressing either the most significant concern or a group of lesser concerns which collectively produce major water quality and quantity control improvements throughout the basin.