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Fallon County staff plan pigging and chlorination of transmission line; testing and coordination required
Summary
County utility staff outlined a planned pigging operation to clean and disinfect a transmission line serving the golf course and other customers, including use of two pigs, high‑volume compressors and chlorine slugs; staff will coordinate timing, endpoint testing and pond filling contingencies.
County utility staff described a multi‑step plan to pig and disinfect a long transmission line that supplies the golf course and other users.
The operation will use a pig launcher and send two pigs in sequence powered by air compressors, with expected pressures in the 80–100 psi range to maintain volume. Staff plan to load chlorine pellets into the launcher as a disinfection slug after the line is purged, and then send the slug through the system. Rich (utility testing) was named as the person who will be at the downstream testing location to monitor chlorine residuals and advise when to stop pumping. Staff estimated transit and contact times (roughly 1.5–2 hours from launch to endpoint under expected flow) and said they will run repeated bacteriological tests and report results to DEQ as required.
Staff recited recent water‑quality test history: colony counts (CFU) in one plan sequence had recorded values of about 170,000, then 800, then 36,000; those counts were discussed as background evidence for the need to pig and disinfect. Commissioners and staff agreed the operation should be scheduled when sufficient personnel can be present to run pumps, monitor chlorine and respond if a pig becomes stuck. Additional operational notes included using two compressors for volume, staging the pig launcher and ensuring adequate bottled chlorine for both gas and pellet dosing.
Next steps: staff plan to pig the line as soon as scheduling allows (discussed for a possible near‑term window), coordinate with the golf course and have Rich perform endpoint chlorine testing; they will then run follow‑up sampling and submit results to DEQ.
