Powers Engineering, Inc. - Hydrologic & Hydraulic Modeling

Hydrologic & Hydraulic Modeling

RJN Group, Inc. - Combined Sewer Overflow-Parkridge Addition Combined Sewer Separation and Relief

Owner - Metropolitan St. Louis Sewer District

Updated planning level Hydra model for the combined sewer system in the Parkridge Area. Determined design flows and flows causing surcharged conditions using the Hydra program. Determined if the sanitary design flows provided by MSD could be used for final design. Updated the Hydra model using actual inflow and infiltration investigation data and survey data. Revised the model to reflect PIRR (private inflow and infiltration reduction). Evaluated cloudburst and synoptic rainfall events. Completed the hydraulic model for the existing and proposed conditions. Created flow files for WET and DRY conditions. Determined if the active CSO could be removed and if basement backups would be present for deign storms. Determined the resulting separate sewer pipe sizes, alignment, and construction cost estimates. Prepared a detailed Design Study. Prepared final hydraulic calculations along with a detailed Hydra model and report.

Dates - 01/2006 - 12/2006

HWC Engineering, Inc. - Long Term Control Plan (LTCP) Sewer Model

Owner - City of Attica, IN

Developed a SWMM planning model describing the combined sewer and three existing combined sewer overflows (CSO). Conducted calibration of the SWMM model using available flow meter and rain gauge data. Modeled the effects on the combined sewer system and the three CSO’s using the IDEM 1-year 1-hour storm and 10-year 1-hour storm. Modeled the combined sewer after theoretical implementation of the LTCP control alternatives. Modeled the proposed LTCP control alternatives using the IDEM storms. Prepared a final report of the existing and proposed LTCP control alternatives.

Dates - 07/2007 - 08/2008

RJN Group, Inc. - Combined Sewer Area Inflow/Infiltration Investigation - Martigney Creek Model

Owner - Metropolitan St. Louis Sewer District

Assisted in the development of a Hydra model for the Martigney Creek sewer shed. Hydra model update included:

SY layer refinements such as bypass & diversion/interceptors reconciliation, pump station characterization, model/base map discrepancy resolution, flow monitor locations
SE Layer refinements such as redrawing SE layer polygons, modification of defects data WET and DRY spreadsheet tools, representative meter assignments and checking defect connects
Completion of flow meter delineation & sequencing, determination of representative rainfall gauges and processing of flow meter data WET and DRY spreadsheets, modification of monitor defects summary tables and updating of the DefectsD and DefectW flow files.
Modification of the LU layer.
Determination of Major Water Users.
Incorporation of the RJN inflow and infiltration (I/I) detailed defects into spreadsheet tools, connection of the defect areas and revision of the DefectsD and DefectsW flow files.
Drainage layer modifications and boundaries. Re-creation of the DR_MAR flow file.
Calibration for Dry season and WET season, creation of RDII graphs & model calibration.

Dates - 09/2007 - 04/2009

RJN Group, Inc. - Combined Sewer Area Inflow/Infiltration Investigation - 2007141

Owner - Metropolitan St. Louis Sewer District

Developed detailed reports and recommendations for sewer remediation projects based on field data collected by RJN Group, Inc. Developed and implemented comprehensive procedures for manhole defect summaries, pipe segment defect summaries, cost estimates, and associated comprehensive technical reports. Established sewer remediation/repair protocols based on the severity of sewer segment I/I defects and structural integrity. Evaluated CCTV inspection data associated with both manholes as well as combined and separate sewer pipe segments ranging in size from 6” to 72” in diameter. Prepared detailed repair/remediation recommendations for sewer segments and manholes, including trenchless technologies and excavation repairs using approved standards. Determined accuracy of inflow and infiltration field estimates through the analysis and comparison to inflow and infiltration derived from flow monitoring data.

Dates - 11/2007 - Present

American Structurepoint, Inc. - SOQ for errard and Allison Storm Relief Project

Owner - Town of Speedway, IN

Developed two XPSWMM models for the separation of two combined sewer areas in the Town of Speedway, IN. Assisted the Town in locating new flow meters for calibration purposes and conducted calibration of the XPSWMM models using flow meter and rain gauge data. Modeled the effects on the combined sewer system using the IDEM 1-year 1-hour storm and 10-year 1-hour storm and modeled separation alternatives for the combined areas. Determined the size of the new storm sewers, underground detention pond, and best management practice (BMP) measures for storm water quality and evaluated the flows in the receiving creek. Prepared a report of the existing system which outlined the proposed separation alternatives, pipe sizes, detention pond, and BMP’s.

Dates - 12/2008 -9/2009

Evansville Water and Sewer Utility (EWSU) - Engineering Study for Cave Avenue and Fickas Road

Owner - Evansville Water and Sewer Utility (Evansville, IN)

Prepared a Sanitary Sewer Needs Assessment for the areas of Cave Avenue and Fickas Road and evaluated the feasibility of bringing gravity sewers to these areas. Prepared preliminary design alternatives consisting of approximately 9,000 LF and 4,000 LF of proposed sanitary sewers for Cave Avenue and Fickas Road, respectively. The engineering study included the Definition of Needs Assessment Areas, Description of Project Need, Survey Project Areas, Development of Proposed Alternatives, Recommendation of Alternative and Opinions of Probable Cost, Research and Recommend Funding Options, Research Permits and Schedule, Conclusion Development and Preparation of Supporting documents.

Dates - 12/2008 -5/2009

AMEC - CSO Jefferson Barracks Subsystem No. 72 Interceptor (I-122) Separation

Owner - Metropolitan St. Louis Sewer District

Updated planning level Hydra model for the combined sewer system in the Martigney Creek/Jefferson Barracks Area. Revised the hydraulic model to reflect the proposed options for the sewer system which included new sewers, sewer rehabilitation, sewer abandonment and Private Inflow and Reduction Report (PIRR). Revised the hydraulic model to reflect the proposed sewer system with voluntary I/I reductions based on the (PIRR) prepared concurrently by AMEC Infrastructure. Evaluated the sanitary flows provided by MSD to assure the planning flows could be used for final design. Determined the design flows causing surcharged conditions. Evaluated the MSD design storm center-loaded cloudburst for proposed conditions. Conducted a sensitivity analysis of the PIRR. Provided an explanation of the evaluation of the design flows, and the results of the proposed alignment and variations. Provided advantages and disadvantages of proposed options. Evaluated whether the interceptor could be eliminated and evaluated if basement backups could be prevented for the design flows. Prepared a “Design Study Hydra Report” outlining existing and proposed conditions and subsequent update memos.

Dates - 01/2009 - Present

AMEC - McKelvey Project "A" and "B" Sanitary Relief

Owner - Metropolitan St. Louis Sewer District

Updated the existing updated MSD Hydra model as required per AMEC Infrastructure field surveys. Produced profile output summary tables for the existing conditions with the by-passes eliminated. Produced profile and output summary table of the existing conditions with the Fee Fee Creek trunk sewer HGL at the full model HGL elevation (by-passes left active). Responded to questions regarding the existing model. Revised the hydraulic model to reflect the proposed options for the sewer system which included new sewers and revised alignments. Modified the hydraulic connectivity component of the system to account for new pipe construction. Modeled scenarios and modified the hydraulic connectivity component of the system to account for I/I reduction goals by defect type. Evaluated one MSD cloudburst design storm, center-loaded. Finalized proposed conditions model. Produced profile and output summary table of the proposed conditions with the by-passes eliminated. Produced profile and output summary table of the proposed conditions with the Fee Fee Creek trunk sewer HGL at full model HGL elevation as starting condition. Produced profile and output summary table of the proposed conditions and evaluated basement backups. Responded to questions regarding the proposed conditions model. Prepared a “Design Study Hydra Report” outlining existing and proposed conditions and subsequent update memos.

Dates - 01/2009 - Present

Evansville Water and Sewer Utility (EWSU) - 30% Design for Cave Avenue and Fickas Road

Owner - Evansville Water and Sewer Utility (Evansville, IN)

Performed engineering services for the 30% Sanitary Sewer Design for the areas of Cave Avenue and Fickas Road. The project included survey, geotechnical report, State Revolving Fund (SRF) and Preliminary Engineering Report (PER) and completion of 30% Design for lift stations, gravity sewers and low pressure systems as needed to bring sewer service to the areas. The Cave and Fickas areas had approximately 9,000 LF and 4,000 LF of proposed sewers respectively.

Dates - 6/2009 - Present

American Structurepoint, Inc. - SSES and EPA Order Compliance

Owner - City of Lawrence Utilities (Lawrence, IN)

Interpreted flow meter data for 54 meters to determine dry and wet weather flows. Created an XP-SWMM model of the Lawrence sanitary sewer system to support a Sewer System Evaluation Survey (SSES) prepared by American Stucturepoint for the City of Lawrence. The separate sewer system includes approximately 4,000 manholes, 900,000 linear feet of sewer pipes varying in size from 4” to 42”, and 25 lift stations. Calibrated the sanitary sewer model to accurately represent the current sewer system conditions and its response to selected representative storms. Developed and modeled alternatives that will alleviate sanitary sewer overflows in the City of Lawrence. These alternatives included a combination of RDII removal, addition of relief sewers, and capacity increases. Evaluated the SSO results of three storms that represent approximately the 10, 25, and 100-year rainfall events. Prepared a memo report with the model findings.

Dates - 09/2009 - 02/2010

Black & Veatch Corporation - Fall Creek / White River Tunnel System Project

Owner - Indianapolis DPW

Provided SWMM and surge/transient modeling services for the Fall Creek/White River Combined Sewer Overflow Storage Tunnel to evaluate the hydraulic components of the tunnel and determine its final size. Provided hydraulic support to all team members, which included sizing the consolidation sewers, diversion structures, and drop shafts. Prepared technical memorandum for the basis of tunnel design as it pertains to meeting the Long Term Control Plan objectives. Prepared a hydraulic support technical memorandums summarizing the SWMM and Transient model results as well as the sizing of consolidation sewers, diversion structures, and drop shafts.

Dates - 09/2007 - 04/2009



Environmental Engineering Projects

Water Resources Projects

Civil Engineering Projects
Hydrologic & Hydraulic Modeling