Detroit Water and Sewerage Department Department Sewer Collection - - PowerPoint PPT Presentation

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Detroit Water and Sewerage Department Department Sewer Collection - - PowerPoint PPT Presentation

Aug 06, 2023 208 likes •756 views

Detroit Water and Sewerage Department Department Sewer Collection System Sewer Collection System Maintenance and Rehabilitation Update Update Samuel A Smalley PE Samuel A. Smalley, PE Assistant Director Asset Maintenance Group Sewer Collection

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Detroit Water and Sewerage Department Department

Sewer Collection System Sewer Collection System Maintenance and Rehabilitation Update Update

Samuel A Smalley PE Samuel A. Smalley, PE Assistant Director Asset Maintenance Group

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Sewer Collection System Maintenance and R h bili i U d Rehabilitation Update

  • DWSD sewer collection system
  • verview
  • verview
  • Sewer maintenance improvements
  • Rehabilitation program for sewer

collection system collection system

  • CIPP Process
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Asset Maintenance Group Asset Maintenance Group

  • Mechanical Maintenance Division (236 FTE)

Mechanical Maintenance Division (236 FTE)

  • Maintenance and Repair Division (326 FTE)

i i j i li b i li

  • Engineering – Major Pipeline, Urban Pipeline,

and Planning (9 FTE)

  • Responsible for all water mains, sewer mains,

water booster stations, sewer lift stations, DWSD owned buildings, and 900+ vehicle and construction equipment fleet

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Detroit Sewer Collection System Detroit Sewer Collection System

  • 3 400 miles of sewer system piping

3,400 miles of sewer system piping

  • 2,300 miles of lateral sewers

3 lif i i i

  • 13 sewer lift stations in Detroit
  • 78 outfalls to Detroit River and Rouge River
  • 9 drainage districts in Detroit
  • 4 maintenance yards

4 maintenance yards

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DWSD SEWER SERVICE AREA

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Detroit Sewer Pipe Class and Length Detroit Sewer Pipe Class and Length

Type of Sewer Typical Sizes Length yp yp g Total 3,383 miles Lateral 6 to 24 inches 2,258 miles Connector 24 to 48 inches 559 miles Trunk 48 to 60 inches 483 miles Trunk 48 to 60 inches 483 miles Interceptor Large diameter 83 miles

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DWSD Large Diameter Sewers DWSD Large Diameter Sewers

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9 DETROIT SEWER DISTRICTS

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Detroit Section Maps – Water and Sewer

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DWSD Maintenance DWSD Maintenance Districts

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Sewer System Maintenance Improvements

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Sewer System Maintenance Sewer System Maintenance

  • Refurbished (11) and replaced (3) vactors

( ) p ( )

  • Factory training for fleet mechanics
  • Current fleet – 26 vactors and 1 Super Sucker
  • Purchase and deployment of better equipment ,

tools, and nozzles – rotating jet nozzles, root kits, metal detectors pole camera rebuilt sewer video metal detectors, pole camera, rebuilt sewer video truck

  • Engaging employees at all levels of the

g g g p y

  • rganization – increased training and seek out

input and bright ideas

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Sewer System Maintenance Sewer System Maintenance

  • Eliminate roadblocks to production

Eliminate roadblocks to production

  • Moved many employees back to day shift

Q /QC d l i i f

  • QA/QC – random sample inspections of

rodding with pole camera and video truck

  • Management by walking around
  • Carrot and stick for overtime work
  • Establish useful metrics and measure

performance performance

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Rotating Jet Nozzle Rotating Jet Nozzle

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AMG Performance Scorecard Maintenance & Repair Division 2009‐10

Catch Basins Cleaned / Repaired Combined Yards

1,200 1,400 ers

Catch Basin Work Orders (New) Catch Basin Work Orders (Completed) Catch Basins Goal

(Approx. 90,000 in System Goal Rep.>1% or .006)

907 816 698 756 801 889

764

800 1,000 mber of Work Orde

Backlog of Catch Basin WOs, measured in total number of open Wos

331 790 487 573 600 491 382 349 501 371

515

371

513 353 581 424 495

400 600 Nu

544 445 331 269 163 51 487 240 459

390

328 186 115 90

267

371

359

200 400

91

Jul 09 Aug 09 Sep 09 Oct 09 Nov 09 Dec 09 Jan 10 10-Feb Mar 10 Apr 10 May 10 Jun 10 Jul 10

NOTE: Total Work Orders = Previous Month's Backlog of Work Orders + This Month's New Work Orders

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Lateral Sewer Rodding/Cleaning Lateral Sewer Rodding/Cleaning

  • 2007 – 40 miles
  • 2008

75 miles

  • 2008 – 75 miles
  • 2009 – 105 miles
  • 2010 – on pace to hit 400+ miles
  • Goal is to clean 700 miles annually
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AMG Performance Scorecard Maintenance & Repair Division 2009‐10

60

Sewer Rodding/Combined Yards

50 L e n g t h 30 40 c l e a n 20 e d i n m 10 m i l e s Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul 2010

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MAINTENANCE & REPAIR CENTRAL YARD PERFORMANCE SCORE CARD

140 160 180 d Catch Basins Cleaned or Repaired Maintenance & Repair: Central Yard-2009-10 2 3 n miles

Sewer Rodding Maintenance & Repair Central Yard- 2009-10

20 40 60 80 100 120 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul number of jobs completed 2009 2010 1 1 2 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Length cleaned in 2009 2010 20 25 30 leted

Number of Mains Repaired by DWSD Personnel Maintenance & Repair: Central Yard-2009-10

200 250 300 mpleted Number of Services Repaired or Installed Maintenance & Repair: Central Yard-2009-10 5 10 15 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul number fo jobs comp 2009 2010 50 100 150 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul number of jobs com 2009 2010

YARD TO YARD COMPARISON

EAST YARD 100 120 140 160 d Catch Basins Cleaned or Repaired Maintenance & Repair Yard to Yard Comparison - July 2010 NORTH YARD WEST YARD 600 700 800 900 Number of Services Repaired or Installed Maintenance & Repair Yard to Yard Comparison - July 2010 CENTRAL YARD EAST YARD WEST YARD 20 25 Number of Mains Repaired by DWSD Personnel Maintenance & Repair - Yard to Yard Comparison July 2010 EAST YARD 30.0 35.0 40.0 45.0 es Sewer Rodding Maintenance & Repair Yard to Yard comparison - July 2010 CENTRAL YARD ,0 NORTH YARD WEST YARD 20 40 60 80 100 number of jobs completed CENTRAL YARD EAST YARD 100 200 300 400 500 number of jobs completed NORTH YARD 5 10 15 number of jobs completed CENTRAL YARD NORTH YARD WEST YARD 0.0 5.0 10.0 15.0 20.0 25.0 Length cleaned in mile
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Geographical Information Systems

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DWSD Sewer Rehabilitation DWSD Sewer Rehabilitation Program Program

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Sewer Rehabilitation Update Sewer Rehabilitation Update

  • Contractor based CIP program

p g

  • Lining, pipe bursting, open cut replacement, and

slip lining options – CIPP primary option

  • Current rehabilitation program started 1996
  • 264 miles of sewer lined since early 1980’s

I t t t d i fl d i filt ti i

  • Intent to reduce inflow and infiltration, improve

customer service, reduce maintenance issues, increase system capacity without expansion y p y p

  • Current Contract – 3 years $80 million contract

with Inland Waters Pollution Control

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CONTRACT # SEWER CLEANED SEWER LINED Linear Foot Miles Linear Foot Miles CS-963 8,990 1.7 8,990 1.7 CS 1164 CS-1164 20,100 3.8 20,100 3.8 CS-1215 22,190 4.2 22,190 4.2 CS-1256 46,230 8.8 46,230 8.8 CS-1325 157,885 29.9 130,956 24.9 CS-1368 825,490 156.4 797,558 151.1 DWS-864 241,474 45.8 200,500 38.0 DWS-865 222,244 42.1 165,575 31.4 DWS-876 63,003 12.0 Ongoing Ongoing DWS-877 81,905 15.6 Ongoing Ongoing TOTALS 1,689,511 320.3 1,392,099 263.9

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CIPP – 4’6” Brick Sewer CIPP 4 6 Brick Sewer

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CIPP – 4’6” Brick Sewer CIPP 4 6 Brick Sewer

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CIPP – 4’6” Brick Sewer CIPP 4 6 Brick Sewer

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CIPP – 4’6” Brick Sewer CIPP 4 6 Brick Sewer

Before 9 Days Later

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Outfall CIPP Rehabilitation

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CIPP – Technical Envelope CIPP Technical Envelope

Diameters Diameters 8” to 108” 8” to 108” Effluent Temperature Effluent Temperature Up to 130 Up to 130° ° F F pH Range pH Range 1.0 to 10.0 1.0 to 10.0 Pipe Condition Pipe Condition Fully / Partially Fully / Partially Deteriorated Deteriorated Bends and Turns Bends and Turns Up to 90 Up to 90° ° Offset Joints Offset Joints Yes Yes Diameter Changes Diameter Changes Yes Yes Install Length* Install Length* Up to 1200’ Up to 1200’ g p Host Pipe Material Host Pipe Material All Materials All Materials

* Depends on Diameter

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CIPP Material Makeup CIPP – Material Makeup

  • Liner

Liner

– Polyester Needle Felt Tube w/ Polyurethane Coating – Thickness Designed to Structural Requirements – Container for Resin

  • Resin System

– Polyester, Vinyl Ester, or Epoxy Resin – Catalyst used to accelerate curing – Colored Dye added to assure resin saturation

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CIPP Design Calculations CIPP – Design Calculations

  • Design Parameters Based on ASTM F1216

Design Parameters Based on ASTM F1216

– Pipe Condition – Pipe Diameter p – Pipe Ovality – Ground Cover – Water Table – Live Loads – Flexural Modulus

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CIPP Process CIPP ‐ Process

  • Clean and Inspect via CCTV prior to lining

Clean and Inspect via CCTV prior to lining

  • Manufacture custom sized liner (i.e. wet‐out)

ll i b i

  • Install Liner by Inversion
  • Cure Liner (Steam or Hot Water)
  • Cut Ends and Reinstate Laterals
  • Final Inspection and Report completed by

Final Inspection and Report completed by CCTV

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Wet‐out

Impregnated Liner Pinch Point

Wet‐out

Resin Slug Roller Bed g

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Liner Installation Liner Installation

Preparing Liner Fasten Liner to Column Impregnated Liner

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Liner Installation Liner Installation

Air Inversion Water Inversion Impregnated Liner Impregnated Liner Tower

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Curing g

Water Cure Steam Cure

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Cut Liner Ends Cut Liner Ends

Cutting Liner End at Manhole Cut Liner End Manhole

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Lateral Reinstatement Lateral Reinstatement

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Final TV Final TV

Existing Pipe Relined Pipe

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Quality Control Quality Control

– Progress Meetings Wet Out – Wet Out – Inspection

  • Inspector Training
  • Inspector Training
  • Testing
  • Cook Logs

Cook Logs

  • Liner Samples
  • Post Inspection
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CIPP T hl O C t CIPP – Trenchless vs. Open‐Cut

  • Jointless

Jointless

– eliminates infiltration, exfiltration, root intrusion

  • Less ‐intrusive construction

– Minimal ground repair, relieves environmental concerns

  • Minimal Public Disruption

p

– Reduced traffic congestion and social costs

  • Installation productivity gains

– Reduced Construction Time

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CIPP P f Th h P f CIPP – Proof Through Performance

  • Millions of LF installed World‐Wide

Millions of LF installed World Wide

  • Inert material with indefinite life

S l i i h i d fl i

  • Structural pipe with increased flow capacity
  • Applicable to a variety of pipe conditions,

diameters, and locations

  • Custom designed to meet conditions specified

g p

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Q i ? Questions?

Samuel A. Smalley, PE Assistant Director – Asset Maintenance Group Detroit Water and Sewerage Department