Alex Churchill

 What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT

 Overflows are a Symptom – Not the Problem 3 WWETT 2015

Example Charlotte, North Carolina ~4 miles Five Year Overflow Record – Different Color / Year 4 WWETT 2015  Overflow locations – “Random”  >90% in pipes less than 12”  Historical GIS – Helpful – But Insufficient  Where & When to Deploy Cleaning Resources  Cost Effective & Timely Condition Information

% System Cleaned Annually Overflows / 100mi Charlotte 2 5 WWETT Municipalities Cleaning vs. SSO Occurrence Getting to 2 SSO’s/100 miles requires 76% cleaning on average

 Target Historical Problematic Areas ◦ >70% Pipes Essentially Clean ◦ <10% Need Immediate Action  Cleaning a Clean Pipe ⇒ Wastes Resources  Not Cleaning a Dirty Pipe ⇒ SSO Acoustic Inspection Results ~6 Million Feet of Pipe WWETT

 What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT

8  CCTV/Robotic Camera  Pipe Profiling / Robotic Multi-Sensor  Push Camera  Zoom Camera  Acoustic  Manhole Inspection

 What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT

 Patented technology  Gravity-fed sewer focus  Developed in Charlotte with CMUD as key partner 10  Over 12M feet inspected  Rapid assessment helps better focus cleaning and CCTV resources WWETT 2015

 How Does it Work? Transmitter “Yells” Receiver “Listens” 11 WWETT 2015

 No Flow Contact / No Confined Space Entry  Simple to use – train operators in minutes  Low Cost–Pennies/foot  Rapid Onsite Results – Under 3 min./segment  Portable < 30 lbs  GIS Integration – GPS Enabled  Archive Pipe Segment Blockage Assessments 12 WWETT 2015

Obstructed No Obstructions Root Fibers Limited Growth Grease Limited Build Up Root Fibers and/or Grease Robot Can Pass Through Root Fibers and/or Grease Robot Cannot Pass Through Acoustic ScoreCCTV Comparison WWETT 2015

Blockage Assessment 10 Blockage Assessment 7 Blockage Assessment 5 CCTV Robot was Able to Pass Through Root Fibers Blockage Assessment 2 14

15  Sewer Line Data Organizer – SL-DOG  Downloads SL-RAT data  First step in enabling Condition Base Maintenance  Productivity Management  Measurement QA  Visualize results in Google Earth or export to Excel  Facilitates management of multiple devices WWETT 2015

16

WWETT Legend: SL-RAT In Field Pipe Assessment 0: 1-3: 4-6: 7-10:

 What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT

Founded 1822 Combined operations with Richmond County in 1996 Population Served 190, ,040 miles of sewer Covers 280 square miles Under GA EPD Consent Order WWETT 2015

 Needed to get “outside the box” to meet the requirements of the Consent Order  Needed to get a handle on SSO performance  Hence, needed to get an overall snapshot of their system  SL-RAT provided a simple low-cost solution with CBM capability 20 Augusta-Richmond County Service Area WWETT 2015

 3 SL-RAT’s – purchased between 2/13 and 2/14  Run with 2 person crews per SL-RAT  Averaging ~7500 feet PER 8 hour crew day  Plan out inspection areas based on tax-maps  Combined with manhole inspection program  Acoustically screening entire system ~ 1x per year 21 WWETT 2015

QA Cleaning Fix GIS Issues Update Records Schedule Next Inspection 22 Street Name Parcel Address Line Sizes 1 Print Maps & Give to Crew 2 Conduct Inspections 4 Create Base Report 3 Download SL-RAT 5 Map Out in GIS 6 Generate Cleaning Crew Work Orders 7 Close Out Re-Charge SL-RAT WWETT 2015

 >17,000 segments inspected in ~15 months of work  >20,000 manholes located and inspected  >3.6 MILLION Feet (682 miles) % Poor20.4% Fair 62.3% Good WWETT 2015

Trailing 12 Month SSO’s/Month SSO TREND WWETT

WWETT

 What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary 26 WWETT 2015

1. The SL-RAT is simple, reliable, and easy to use 2. Keep up with the data - DAILY! Backlogs can get overwhelming 3. Forces discipline in visiting every manhole – identify issues, update GIS records, etc 4. Has focused efforts on the 38% of segments that are Poor or Fair 5. Requires teamwork to achieve full potential – cleaning crews, GIS, inspection crews – must all work together 6. Effective in economically reducing SSO rates 7. Future plans include historical trending with CityWorks 27 WWETT 2015

28 Phone:877-PIPECHK ( ) Website: WWETT 2015