Michigan Dept. of Environment, Great Lakes, and EnergyLocation of Allen Creek Drain. Source files were provided by Washtenaw County. Field Name Field Description NOTES Feature description DIA Diameter in inches, if known This data is used in the Gelman Site of 1,4-Dioxane Contamination web map ( item details ).If you have questions regarding the Gelman Sciences, Inc site of contamination contact Chris Svoboda at svobodac@michigan.gov , 517-256-284 . Report problems or data functionality suggestions to EGLE-Maps@Michigan.gov .ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/0e49830d04344132b57e94ee2eeac9f1_0engState of Michigan Open Data PortalPublicGelman Site of 1,4-Dioxane Contamination - Allen Creek Drain [Michigan]Web servicesMichiganLast Modified: 2025-09-04