US lawIllinoisRegulationsTitle 77 — PUBLIC HEALTHCHAPTER I: DEPARTMENT OF PUBLIC HEALTHSUBCHAPTER r: WATER AND SEWAGEPart 920 — WATER WELL CONSTRUCTION CODE920.ILLUSTRATION C77 Ill. Adm. Code 920.ILLUSTRATION CC Gravel Pack ConstructionLast amended: 2000Year: 2026Length: 6 wordsOfficial source Section 920.ILLUSTRATION C Gravel Pack ConstructionPrevious77 Ill. Adm. Code 920.ILLUSTRATION BNext77 Ill. Adm. Code 920.ILLUSTRATION D