社会インフラ点検 19項目
Water Main Condition Assessment
このチェックリストは英語版です。
Condition assessment of buried potable water transmission and distribution mains documenting leaks, corrosion, break history, and pressure performance.
AWWA M77AWWA C651EPA Distribution System Guidance
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Asset Data & History
- Is pipe material, diameter, and installation year recorded? *
- Pipe material *
- Number of documented breaks/failures in the last 5 years
- Is the main's soil corrosivity/environment classification on file?
- Date of assessment *
Leak Detection & Loss
- Was acoustic leak detection or correlation performed on the segment? *
- Were any active leaks identified? *
- Is non-revenue water for the district within the utility's target?
- Note leak locations and estimated severity
Structural & Corrosion
- Where exposed/inspected, is external corrosion (graphitization, pitting, tuberculation) within acceptable limits? *
- Was remaining wall thickness measured or estimated (electromagnetic, transient, or coupon)?
- Is cathodic protection, if present, functioning at adequate potentials?
- Estimated remaining wall thickness at worst location (percent of nominal)
Hydraulic Performance
- Is system pressure within regulatory minimum during normal and fire-flow demand? *
- Were hydrant flow tests used to estimate available fire flow?
- Is the C-factor/carrying capacity consistent with expected values for the pipe age?
Findings & Prioritization
- Is the segment assigned a likelihood-of-failure / consequence-of-failure risk score?
- Is the segment recommended for repair, rehabilitation, or replacement?
- Assessor signature *
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