ASI prepares watershed plans and has extensive experience in drainage area delineation, hydrologic/hydraulic modeling, water quality modeling, measuring stream flow, stream sampling, and performing stream bank, outfall and sediment surveys.
 

FRANKLIN SUBWATERSHED STUDY

 

Applied Science, Inc. (ASI) was the prime consulting engineer for the Franklin Subwatershed Study.  The study identified current flooding, stream bank erosion, sedimentation, and non-point source pollution problems in the subwatershed.  Solutions were developed and evaluated that mitigate the problems and restore the value of the stream for riparian landowners and restore fish/wildlife habitats.  ASI developed hydrologic/hydraulic models of the Franklin Subwatershed using the SWMM computer program.  The models were used to evaluate existing conditions, flow control alternatives, and best management practices that would reduce peak flood flow rates.  ASI developed improvement alternatives based on site conditions and input from each of the subwatershed communities.  Improvement alternatives considered for the Franklin Subwatershed included detention pond retrofit, restriction of stormwater inlets, in-system storage, and stream bank stabilization.  ASI provided design services for two streambank stabilization projects within the Franklin Subwatershed.  ASI provided construction services for these projects.

INSTALLATION OF IN-SYSTEM STORAGE DEVICES

 

Applied Science, Inc. (ASI) was the prime consultant performing the study and design and providing assistance during construction for installation of in-system storage devices in the wastewater collection system to reduce combined sewer overflow (CSO) discharges.  Thirteen (13) devices were installed in sewers that range from 10.5 feet to 15.5 feet in diameter. ASI was responsible for the contract administration, scheduling and engineering services for the project as well as providing hydraulic analysis and civil/site design. This project provides about 54 MG of storage volume and a reduction of approximately 563 million gallons of CSO during a typical year.  In the study phase, 30 proposed device locations were evaluated based upon the sewer condition and hydraulic impacts.  This evaluation was used to either reject a device location, modify the device location, or accept the device location.  Through this process, 13 final locations were determined.  ASI performed the hydraulic analysis required for this phase, including the GDRSS modeling of the sewer system, storage volume determinations, unsteady-state analysis of device operations, and head loss calculations.  The unsteady-state modeling of the dams was done using the Transient Analysis Program (TAP).  The allowable rates of raising and lowering the dams, the maximum upstream level, and the operating scheme for capturing CSO were developed and tested using TAP models of the sewers and dams. In the design phase, ASI was responsible for further hydraulic analysis and design of in-system storage devices and civil/site design.  The hydraulic design and analysis required further modeling with both the GDRSS model and an unsteady model (TAP).  The civil/site design required the design of road replacement, utility relocation tunnel reconstruction and traffic control as well as the inflatable dam or gate design. During the construction assistance phase, ASI evaluated bids, responded to questions regarding contract documents, provided engineering and construction management services and provided assistance during start-up.

WATER WORKS PARK II

 

Applied Science, Inc. (ASI) is a joint venture partner in the design/build and maintenance of a 320 mgd water treatment plant located on the existing plant site and was constructed while the existing plant was in operation.  ASI participated in both the design phase and construction phase. During the design phase, ASI prepared specifications, drawings and calculations for a new 8mg finished water reservoir, a reservoir under drain system and pump station, an 800,000 overflow basin and dewatering system, sizing and layout of the finished water tunnel system, modification and rehabilitation of an existing 20 mg reservoir, a finished water junction/isolation chamber, and filter backwash wet well. Included in ASI’s design responsibilities was the preparation of the hydraulic gradeline calculations through the plant and through the residuals transfer and process system. ASI also provided design services for storm, sanitary, water, and process piping for the treatment plant. ASI evaluated the condition of existing piping and structures on site, researched rehabilitation options for the existing piping and structures, and performed an economic feasibility study of proposed site piping and utility structures. ASI provided the Field Civil Engineer for the construction phase of this project. Responsibilities included verifying the conformance with the Quality Assurance/Quality Control Plan, overseeing and coordinating work of all testing firms and field inspectors, and assisting in field engineering duties. ASI also assisted in the preparation of the new operation and maintenance manuals for the water treatment facility.