How PGW Manages Pipeline Installation in a Congested Underground. Presentation by Mike Parzanese Project Manager Construction Philadelphia Gas Works
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1 How PGW Manages Pipeline Installation in a Congested Underground Presentation by Mike Parzanese Project Manager Construction Philadelphia Gas Works
2 Summary Philadelphia by the numbers Philadelphia Gas Works by the numbers Design Considerations Installation Techniques Above Ground Considerations
3 Philadelphia City of Brotherly Love 6 th Largest City in US Population 1,567,872 Population Density 11,692/mi 2 Highly Congested Urban Environment
4 Philadelphia Gas Works Company Background Largest Municipal Natural Gas Distributor in U.S. Service Territory City of Philadelphia Established in 1836
5 Philadelphia Gas Works By the Numbers Service Territory mi 2 565,000 Customers 3,031 miles of main 475,000 services Approximately 1,600 Employees
6 Infrastructure Challenges Aging infrastructure 68% of PGW s mains are CI or Unprotected STL
7 Infrastructure Challenges Aging infrastructure 37% of PGW s mains were installed pre 1940
8 Main Replacement Program PGW continually increases Cast Iron replacement each year
9 How Do We Manage?
10 Design Considerations Information Gathering PA One Call Design Tickets City Highway Supervisor Plans Streets Dpt Permit Process- GPIS
11 Route Selection Utilizing route of abandoned utilities or existing main Alternate Routes Network Analysis for Pipe Sizing
12 19 th & Cherry Streets
13 19 th & Cherry Streets
14 Tioga/Kensington Projects
15 Tioga/Kensington Projects
16 Tioga/Kensington Projects
17 Potholing/Daylighting Utilize PGW manpower PGW Contract Language Contractor shall excavate test holes to determine and verify planned route Pennsylvania Act 287 One Call Contractor shall notify PA One Call System and other utilities
18 Vacuum/Hydro Vac Technology Utilizes powerful suction hose and/or high pressure water to conduct a soft dig Spoil tank to store soil cy/hr depending on soil type.33 cy/hr hand digging
19 Vacuum/Hydro Vac Technology Pros Efficiency faster than hand dig Increased Safety Soft Dig Cuts precise trenches Tight Spaces Cons Messy leaves trench wet/muddy cement/asphalt removal Need clean fill If open route, conventional excavation faster
20 Pipe Insertion Utilizing existing pipe as a carrier for new plastic main Saves on excavation and paving costs Factors of Consideration Network Analysis for capacity needs Size of Push/Receiving Pits Number of services
21 Pipe Lining Minimally invasive process which allows for the rehabilitation of existing pipe Benefits Cost Savings 40% on Pilot Project Entire length & fittings are protected Drawbacks Can main be out of service? Offsets, services, branches Finite pull lengths Curing temperatures
22 Horizontal Directional Drilling Steerable trenchless method of installing pipe along a prescribed bore path Benefits Speed of install minimum environmental impact Minimal interference with roadway traffic
23 Horizontal Directional Drilling Factors to Consider Sufficient clearance between structures within 2 must be exposed 18 separation Visual observation of sewer laterals before bore Post inspection of sewer laterals Free of rock, concrete, broken foundation depth
24 Joint Trenching Installation of multiple utilities in one trench Mainly New Construction/New Roadway Benefits Lower Cost Builder digs, backfills, paves Requirements Street side, top utility Minimum 30 cover from power conductors
25 Above Ground Congestion Just as crowded above as it is below Need proper coordination and notification Both PGW and Contractor
26 Above Ground Congestion Contractor Pre Construction Meetings Post No Parking Signs 3-5 days advance Hand out Door Hanger Notification
27 Above Ground Congestion PGWORKS.com/worksites Interactive map Every project listed by zip code Customer feedback survey 5 Steps of Pipeline Improvement Customer Guide Social Media Nextdoor, Facebook, Twitter Coordination with other City Agencies outreach to community organizations and elected officials
28 Above Ground Congestion Interactive Map
29 Above Ground Congestion 5 Steps of Pipeline Improvement 1: Neighborhood Notification 2: Underground Utility Marking 3: New Main Install 4: New Service Line Install 5: Property/Neighborhood Restoration
30 Thank You!
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