I/I Studies

Hydraulic Modeling
Design & Construction
Operation & Maintenance
Regulatory Compliance
Master Planning
Pipedream©

 

 

Dan R. Hegwald, P.E.

Principal Project Manager
Wade & Associates
A CH2M Hill Company
Professional Qualifications
Mr. Hegwald is a Project Manager for Wade & Associates, Inc. He has extensive experience in conducting sanitary sewer evaluation surveys, I/I investigations, wastewater collection system master planning, and in collection system issues associated with SSOs and CSOs. His professional expertise also includes sewer system hydraulic modeling and computer-simulated analysis studies using several hydraulic modeling software packages including Pipedream©software developed by Wade & Associates, Inc. His background includes SSES projects in 12 states, including Texas, Oklahoma, Kansas, Missouri, Colorado, Arkansas, North Carolina, South Carolina, and Iowa. Currently, Mr. Hegwald is Project Manager for a multi-year study of the wastewater collection system for the City of Springfield, Missouri. Other projects which he oversees include Phoenix CMOM Risk Assessment, Fort Worth, Basin M-286 SSES, Fort Worth Village Creek Interceptor Evaluation, Littleton, Colorado Southgate Sanitation District Master Plan, and Johnson County Kansas Collection System Evaluation and Rehabilitation Services.

Professional Registrations
Professional Engineer: Kansas, 1992; Oklahoma, 1994; North Carolina, 1994; Texas, 1995; Missouri, 1996; Colorado, 2000; Arizona (in progress)

Education
Kansas State University, B.S. in Civil Engineering, 1987

Professional Associations
Water Environment Federation
American Society for Civil Engineers
Kansas Water Environment Association
KWEA Wastewater Collection System Committee

Selected Projects
TULSA, OKLAHOMA
Flatrock Creek Basin: Project Manager for the comprehensive SSES of 1 million feet of sanitary sewer in the City of Tulsa. The scope of work included field surveys, report preparation, and design of manhole and pipeline rehabilitation.
Newblock Area: Project Manager for improvement of 300,000 feet of sanitary sewer. The work included 1) Q vs. i analysis, 2) flow monitoring analysis, 3) model calibration, 4) hydraulic analysis, 5) preparation of I/I elimination report, and 6) the general project administration.
Comprehensive Hydraulic Model: Provided computer hydraulic modeling of 9 million linear feet of sanitary sewer. The model included 92 short-term flow monitoring sites and extensive flow analysis. Evaluated impacts of inflow and infiltration and analyzed relief and replacement sewers.
Central Business District: Project Manager for data input and review of the SSES hydraulic model. Conducted 400 building inspections and identified potential I/I connections.
Fred Creek Basin: Project Manager for comprehensive sanitary sewer evaluation and I/I investigation of 298,000 lf of sanitary sewer. Scope includes: Q vs. i analysis and hydraulic networking; development of a hydraulic model of the collection system; and preparation of I/I reduction strategies and management alternatives including cost-effectiveness analysis and private I/I abatement plan.

WEST TULSA, OKLAHOMA
Provided inflow/infiltration defect analyses for 32,000 linear feet of sanitary sewers. Evaluated the flow monitoring data and developed Q vs. i relationships. Developed and calibrated the hydraulic model. Determined the need for, and target location of relief/replacement sewers.

OWASSO, OKLAHOMA
Developed a hydraulic model of the City’s collection system. The study area included 10 lift stations and numerous miles of collection lines. The hydraulic model was used to determine improvements to existing facilities to begin infrastructure development and a master plan for future needs.

BARTLESVILLE, OKLAHOMA
Program Manager for a comprehensive sewer system evaluation survey of 208-mile sanitary sewer system. The study included flow monitoring, manhole inspections, smoke testing, hydraulic modeling, internal television inspection, dyed water testing, and cost effective I/I removal analysis and report recommendations for a $17 million sewer renewal program.

VINITA, OKLAHOMA
Project Engineer for a comprehensive sanitary sewer evaluation survey for 37-mile sewer system. Developed a computer hydraulic model, determined impacts of I/I, and determined cost-effective means of I/I removal.

ENID, OKLAHOMA
Project Engineer for study and analysis of a 246-mile sanitary sewer system conducted to control and manage excessive rainfall-induced flows along major interceptor sewers. Worked in coordination with representatives from EPA Region VI to satisfy requirements of several Administrative Orders.

MIAMI, OKLAHOMA
Performed a sewer system evaluation of a 100-mile wastewater collection system to quantify and analyze inflow and infiltration. Conducted a physical survey to locate system defects and to model time-routed flow rates to each of the City’s two treatment facilities.

NORMAN, OKLAHOMA
Provided inflow/infiltration defect analyses for 1.1 million linear feet of sanitary sewers. Evaluated flow monitoring data and developed Q vs. i relationships. Developed and calibrated a computer hydraulic model and determined the need for and locations of relief/replacement sewers.

SAND SPRINGS, OKLAHOMA
Provided inflow/infiltration defect analyses for 92,000 linear feet of sanitary sewers. Evaluated flow monitoring data and developed Q vs. i relationships. Developed and calibrated a computer hydraulic model. Determined relief/replacement sewer locations.

CLAREMORE, OKLAHOMA
Project Manager for Flow Monitoring Program. Scope included flow monitoring, rainfall monitoring, flow data analysis, Q vs i analysis and reporting.

CLEARWATER, FLORIDA
Project Manager for a comprehensive, system-wide flow analysis and hydraulic modeling program for the City of Clearwater, FL. Provided flow monitoring of 47 temporary and permanent sites, flow data analysis for the entire study area, and calibrated the City's hydraulic model of approximately 1.0 million feet using InfoWorks.

ARCADIA, FLORIDA
Project Manager for a sanitary sewer evaluation survey intended to assist the City with disaster recovery required as a result of Hurricane Charley occurring on August 13, 2004. Project scope includes identification of inflow and infiltration (I/I) sources that are entering the City’s wastewater system from deficiencies and damage that may be attributed to Hurricane Charley.  Field services include approximately 200,000 lf of smoke testing, approximately 160 manhole/visual pipe inspections, CCTV inspections review, and data analysis to determine cost effective I/I rehabilitation necessary to restore the collection system to pre-Hurricane Charley condition. 

SARASOTA, FLORIDA
Provided Forensic Engineering services including review of CCTV tapes of sanitary sewer and metallurgic reports to analyze and provide recommendations for maintenance, descaling and rehabilitation for the Sarasota Square Mall study area.

PHOENIX, ARIZONA
Project Manager for multiple projects for the City of Phoenix, Arizona including CMOM Risk Assessment and Capacity Assurance Plan, Hydraulic Model Validation, Master Plan Update, Pilot I/I Study and Hydraulic Model and Master Plan Update, and Lift Station Flow Capacity Study. The scope of work included temporary flow monitoring at 172 locations throughout the City’s wastewater collection system, evaluation of the City’s current Pipedream? hydraulic model, recalibration of the City’s Pipedream? hydraulic model, identification of CIPs and reporting. The current hydraulic model contains more than 100,000 sewer nodes and is believed to be one of the largest hydraulic models developed in the world.

SCOTTSDALE, ARIZONA
Project Manager for 35-site flow analysis program for the City of Scottsdale, AZ.

TEMPE, ARIZONA
Project Manager for Sanitary Sewer Master Plan Hydraulic Model for the City of Tempe, Arizona. The scope of work included evaluation of temporary flow monitoring data at various locations throughout the City’s wastewater collection system, evaluation of the City’s current Pipedream© hydraulic model, calibration of the City’s Pipedream© hydraulic model, and reporting.

PEORIA, ARIZONA
Project Manager for Sanitary Sewer Master Plan Hydraulic Model for the City of Peoria, Arizona. The scope of work included temporary flow monitoring at locations throughout the City’s wastewater collection system, calibration of the City’s Pipedream© hydraulic model, and reporting.

PIMA COUNTY, ARIZONA
Project Manager for Sanitary Sewer Master Plan Hydraulic Modeling for Pima County, Arizona. The scope of work includes training and support of County staff in the use of Pipedream© hydraulic modeling software.

KINGMAN, ARIZONA
Project Manager for Sanitary Sewer Master Plan Flow Monitoring for the City of Kingman, Arizona. The scope of work included temporary flow monitoring at six (6) locations throughout the City’s sewer system, evaluation of flow data and reporting.

TOPEKA, KANSAS
CSO/SSO Monitoring: Project Manager of flow monitoring at CSO locations and major basin outfalls throughout the City’s 580 miles of combined and separate sanitary sewers. Also managed rainflow monitoring at sites approximating the centers of the City’s major sewersheds. Provided flow data compilation for further modeling. Field crews provided training to City personnel for additional installation & service of flow meters.
East Topeka and Huntoon Basin: Project Manager of an SSES and I/I study of 147,000 feet of sanitary sewer in East Topeka. Phase I: site assessment, flow monitoring, rainfall monitoring, and flow data analysis. Phase II: manhole inspections, smoke testing, flow isolation, TV inspections, dyed-water testing, building inspections. Phase III: development of a hydraulic network and a calibrated hydraulic model, hydraulic gradient and I/I data analysis, and a cost-effectiveness analysis. Phase IV: creation of an infrastructure rehabilitation master plan.

TOPEKA, KANSAS
Deer Creek East: Project Manager for SSES project in conjunction with PEC. Scope included training of PEC personnel in inspection and testing procedures, QA/QC of data, analysis of I/I identification and reporting of recommendations for cost effective rehabilitation.

JOHNSON COUNTY, KANSAS
Project Manager for multi-phase Johnson County Kansas Collection System Evaluation and Rehabilitation Services including: Tomhawk Creek SSES: Project Manager for hydraulic evaluation of Tomahawk sewer system including, flow monitoring at 13 locations, hydraulic modeling and condition assessment of 72” interceptor sewer system; KCMO Metering Plan: Provided evaluation of meter sites for Johnson County Wastewater Interconnects to KCMO.; Indian Creek Basin SSES: Project Manager for comprehensive flow analysis program including 32 monitoring locations, flow analysis to establish I/I and peak basin flow rates, and recommendations for the County’s InfoWorks hydraulic model.

GARDEN CITY, KANSAS
Project Manager for Wastewater Collection System Study, Hydraulic Model and Master Plan. Scope of work included flow monitoring, rainfall monitoring, flow data analysis, manhole inspections, development of a hydraulic model with scenarios for future growth and capital improvement alternatives as well as cost-effectiveness analysis.

INDEPENDENCE, KANSAS
Project Manager of a 5-year I/I study and evaluation of the City’s 400,000 feet of sanitary sewer. Scope includes flow monitoring of the entire system and an SSES in the Priority 1 basins. A hydraulic modeling of the collection system is being developed using Pipedream©. The model will be used to size strategic relief sewers, pumping station improvements, and upgrades to the wastewater treatment facilities.

MONTGOMERY COUNTY, KANSAS
Project Manager for public and private I/I reduction study. Scope included smoke testing, manhole inspections, cleaning and CCTV inspections and analysis for rehabilitation and renewal recommendations.

UNIFIED GOVERNMENT OF WYANDOTTE COUNTY AND KANSAS CITY KANSAS
Project Manager for several projects in the Kansas City metro area. These projects include multi-phased system wide CSO flow monitoring and InfoWorks hydraulic modeling. Mr. Hegwald is currently Project Manger for a CSO Separation project in the West and Middle Jersey Creek Drainage Areas that includes 122,000 lf of combined sanitary sewer. Work tasks include flow monitoring, manhole inspections, smoke testing, GPS survey of all manholes, building inspections, development of CIP and reporting.

SPRING HILL, KANSAS
Project Manager for flow monitoring study of the City’s wastewater collection system. Four key locations were selected. Results of the study were used to identify areas of the system that contain excessive amounts of rainfall-induced I/I. A follow-up SSES has been recommended to reduce flows, eliminate the need for additional capacity requires, and minimize hydraulic upgrading to the City’s wastewater treatment facilities.

PITTSBURG, KANSAS
Performed a comprehensive SSES of 110-mile sanitary sewer system. Included: flow monitoring, manhole inspections, smoke testing, internal television inspection, and dyed-water testing. Results were used to implement a three-year $4 million capital improvement program which included relief sewer construction, manhole and pipeline rehabilitation, and a private-sector I/I disconnect program.

NEWTON, KANSAS
Project Manager for an SSES project for the City of Newton. Provided coordination of smoke testing and manhole inspections for 507,000 feet of sanitary sewer. The project scope also included a cost-effectiveness analysis and report of recommended rehabilitation.

HUMBOLDT, KANSAS
Project Manager for a joint SSES project with Shafer, Kline and Warren, P.A, the City’s principal consulting engineer. The project scope includes smoke testing, manhole inspections, cost-effectiveness analysis and a final report. This project includes 94,000 feet of the City’s sanitary sewer pipeline.

OSAWATOMIE, KANSAS
Project Manager for an SSES project of 155,000 feet of sewer pipeline. The scope of the project includes manhole inspections, smoke testing, a cost-effectiveness analysis and a final report.

BONNER SPRINGS, KANSAS
Assisted in a wastewater treatment facility modification project. Determined hydraulic profile from WWTF influent structure to effluent structure, reviewed construction drawings and established bid items and quantities. Improvements to the existing WWTF included addition of fine air bubble diffusers and static screening.

ATCHISON, KANSAS
Assisted in production of sanitary wastewater lagoon. Reviewed construction drawings, created layout of site grading details, and determined bid quantities.

OLATHE, KANSAS
Conducted a comprehensive sanitary sewer evaluation survey for the City’s Cedar and Mill Creek Watersheds. Coordinated inflow/infiltration source detection field crews, analyzed identified I/I sources, determined cost-effective I/I removal using marginal cost based on computer hydraulic model, determined impacts of sanitary sewer flows due to future growth, and prepared the final report.

JOHNSON COUNTY, KANSAS
Responsible for field inspection and installation of Insituform inversion lining of existing sanitary sewers in the Missouri Township Main Sewer District No. 1.

KANSAS CITY, KANSAS
Placed new sanitary sewer line for the City. Responsibilities included construction inspection of installation of PVC Concrete Truss pipe and connecting manhole structures.

FORT WORTH, TEXAS
Project Manager of multiple comprehensive SSES projects throughout the City of Fort Worth totaling more than 1.5 million linear feet of sanitary sewer. The projects generally include 1) flow monitoring, 2) I/I characterization, 3) hydraulic model calibration, 4) cost-effectiveness analysis, and 5) submittal of final recommendations.

MARSHALL, TEXAS
Project Manager providing training and supervision of crews who conducted a sanitary sewer evaluation survey for the City. Project tasks included training for manhole inspections, smoke testing, and dyed-water testing. The scope also included final analysis and report and prioritization of inflow/infiltration targeted for removal.

ARLINGTON, TEXAS
Project Engineer for the SSES in the Area Y Study Area. Responsible for I/I data review, development of the system hydraulic model, analysis of I/I impacts, model calibration, cost-effectiveness analysis, capacity requirements, optimal I/I reduction goals, recommended rehabilitation requirements and the draft and final reports.

AUSTIN, TEXAS
Project Manager of multiple comprehensive SSES projects in the Williamson Creek and Govalle Drainage Basins totaling more than 0.6 million linear feet of sanitary sewer. The projects generally include 1) flow monitoring, 2) I/I characterization, 3) hydraulic model calibration, 4) cost-effectiveness analysis, and 5) submittal of final recommendations.

BURLESON, TEXAS
Review of flow and rainfall monitoring data, creation of analysis of Q vs i comparisons, estimation of projected peak wet-weather flows for various design storm events, draft and final reports, and presentation of results to the City.

SOUTHGATE WATER & SANITATION DISTRICTS, ENGLEWOOD - LITTLETON, COLORADO
Project Manager for I/I study/Master Plan of approximately 1 million feet of sewer system in 8 basins. Implementation of a flow monitoring program includes installation and data collection of 8 flow monitors and 7 electronic rain gauges followed by flow data analysis. Scope also includes development of hydraulic network and calibrated hydraulic model, Future Growth Analysis and final reporting.

WESTMINSTER, COLORADO
Project Manager for the City’s flow monitoring project. Scope includes installation of flow meters and data collection for 3 sites. Flow analysis and reporting was completed.

SPRINGFIELD, MISSOURI
SSES Project Manager for this multi-phase, multi-year rehabilitation project that includes manhole inspections, visual pipe inspections, building inspections, smoke testing, data analyses, Q vs. i analyses, and creation of a computer hydraulic model for the aging 800-mile sanitary sewer system. A training program for City staff was implemented in I/I source identification and hydraulic modeling using Pipedream© software.

LITTLE BLUE VALLEY SEWER DISTRICT, MISSOURI
Conducted a large-diameter flow monitoring program at 15 locations throughout the District’s interceptor sewers.  Monitoring sites ranged from 12" to 72".   Data was used to evaluate permanent flow metering structures. 

BLUE SPRINGS, MISSOURI
Project Engineer of a sanitary sewer evaluation survey. Work involved site assessment and implementation of a flow monitoring program, flow data analysis and inflow/infiltration (I/I) quantification. Determined basins requiring additional studies and provided a report to the city. I/I per linear foot of pipe was used to identify basins recommended for I/I source detection.

HARRISONVILLE, MISSOURI
Supervised manhole and pipeline rehabilitation design and creation of closed caption TV inspection specifications as a follow-up to a sanitary system evaluation survey of approximately 130,000 linear feet of pipe in the City’s South Outfall Interceptor.

KANSAS CITY, MISSOURI
Project Manager for several projects in the Kansas City metro area. These projects include work in the Spring Valley, Fairwood/Robandee, Burlington Creek, and Rocky Branch Basins, totaling over 400,000 feet of sanitary sewer pipeline. The scope of work over all of these basins includes an SSES, hydraulic modeling, defect analysis and a final report on the findings.

RUDIOSO, NEW MEXICO
Provided Forensic Engineering services which included review of closed-circuit video tapes for fold and form sewer liner, made recommendations for maintaining or replacing existing liner following improper liner installation.

ALBUQUERQUE, NEW MEXICO
Provided assistance in a stormwater drainage study. Determined drainage areas and calculated stormwater runoff tributary to existing and proposed drainage structures for use in a computer-aided hydraulic model. Provided preliminary layout of storm sewer pipe and detention facility.

DeKALB COUNTY, GEORGIA
Provided computer hydraulic modeling of 2 million feet of sanitary sewer. Evaluated impact from inflow/infiltration and analyzed relief and replacement sewer requirements for a 20-year planning period.

GWINNETT COUNTY, GEORGIA
Performed computer hydraulic modeling of 500,000 linear feet of sanitary sewer. Evaluated impacts of identified and unidentified inflow and infiltration and analyzed relief and replacement sewer.

CHAPEL HILL, NORTH CAROLINA
Project Manager for a sanitary sewer evaluation study of approximately 50,000 feet of pipe that resulted in a prioritized plan to identify, quantify, evaluate and eliminate excessive I/I in the Countryside/Timberlyne Area wastewater collection system. The project scope included, site assessment, flow and rainfall monitoring, flow data analysis, supervision of SSES field crews, creation of a hydraulic network and a computerized hydraulic model, hydraulic gradient and I/I analysis, a cost-effectiveness analysis, and final report preparation.

GREENWOOD, SOUTH CAROLINA
Conducted computer hydraulic modeling of 260,000 linear feet of sanitary sewer. Evaluated impacts of inflow and infiltration and analyzed relief and replacement sewers.

Technical Reviews
METHODS FOR COST-EFFECTIVE REHABILITATION OF PRIVATE LATERAL SEWERS
External review committee member for WERF funded private lateral sewer rehabilitation project with Trenchless Technology Center, Louisiana Tech.

Technical Papers
I/I EVALUATION AND REHABILITATION PROGRAM SIMPLIFIED WITH COST-EFFECTIVE GIS IMPLEMENTATION.
Presented at the WEF Specialty Conference, Advances in Urban Wet Weather Pollution Reduction, Cleveland, Ohio, June 28 - July 1, 1998.

COLLECTION SYSTEM FLOW MONITORING POST-REHABILITATION CERTIFICATION.
Presented at the WEF Collection Systems Rehabilitation and O&M: Solving Today’s Problems and Meeting Tomorrow’s Needs Specialty Conference held in Kansas City, Missouri, July 13-16, 1997.

ABATEMENT OF I/I FROM PRIVATE PROPERTY TO REDUCE OVERFLOWS AND BYPASSES.
Co-authored with Mark G. Wade who presented it at the 64th Annual Water Pollution Control Federation Conference held in New Orleans, Louisiana, on September 24, 1992. Published in Water Environment & Technology, March 1994. Reprints available.


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