Seattle Pipe Replacement Precedence
description
Transcript of Seattle Pipe Replacement Precedence
Seattle Pipe Replacement Seattle Pipe Replacement PrecedencePrecedence
Main & Service WaterlinesMain & Service Waterlines
Prepared by: Myron BasdenPrepared by: Myron Basden
Steven Flowers Steven Flowers
Jenny Pearson Jenny Pearson
Yuriy Stryzheus Yuriy Stryzheus
Kerry SullivanKerry Sullivan
IntroductionIntroduction
General look at Seattle’s waterline General look at Seattle’s waterline network.network.
Factor’s affecting pipe’s vulnerability.Factor’s affecting pipe’s vulnerability.
Suggestions on pipe replacement or Suggestions on pipe replacement or maintenance.maintenance.
Seattle’s pipe networkSeattle’s pipe network
Factors Affecting Pipe’s Factors Affecting Pipe’s VulnerabilityVulnerability
Soil corrosivitySoil corrosivity
Age of a pipeAge of a pipe
Pipe’s MaterialPipe’s Material
Pipe Replacement or MaintenancePipe Replacement or Maintenance
Level of Urgency:Level of Urgency:
LOW – 1 factor existsLOW – 1 factor exists
MEDIUM – 2 factors existMEDIUM – 2 factors exist
HIGH – 3 factors existHIGH – 3 factors exist
Pipe Condition Based on 1 FactorPipe Condition Based on 1 Factor
Low Vulnerability
Corrosive SoilAge:
pre-1944Pipe Material:
Cast Ironor or
Pipe Condition Based on 1 FactorPipe Condition Based on 1 Factor
Pipe Condition Based on 2 FactorsPipe Condition Based on 2 Factors
Medium Vulnerability
Soil Corrosivityand Age
Age and Pipe Material
Pipe Material andSoil Corrosivity
or or
Pipe Condition Based on 2 FactorsPipe Condition Based on 2 Factors
Pipe Condition Based on 3 FactorsPipe Condition Based on 3 Factors
HighVulnerability
Age &Soil Corrosivity &
Pipe Material
Pipe Condition Based on 3 FactorsPipe Condition Based on 3 Factors
ConclusionConclusion
Table 2. Summary of Results
Main Lines Service Lines
Length (miles) % of totalNumber of Segments % of total
Red - High Risk
OBC 8.28 0.5 0 0.00
Subtotal 8.28 0.5 0 0.00
Orange - Medium Risk
CO 1.09 0.1 351 0.21
OB 760.03 44.2 7 0.00
CB 5.25 0.3 0 0.00
Subtotal 766.37 44.5 358 0.21
Yellow - Low Risk
C 16.84 1.0 498 0.30
B 521.40 30.3 16 0.01
O 65.26 3.8 90347 53.96
Subtotal 603.49 35.1 90861 54.27
Total % at Risk 1378.14 80.1 91219 54.48
Other Pipes 342.14 19.9 76203 45.52
TOTALS 1720.28 100.0 167422 100.00
Key: O = installed before 1944 (old), B = cast iron pipe (brittle), C = corrosive soil
Questions?Questions?