utilities.iowadot.gov - /NHSX-030-6(231)--3H-06/CADD030(231)/Machine_Control_Surfaces/Sideroads/24th Avenue and US 218/DTMs/

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 2/21/2018  9:15 AM       787880 prop_surf_subgrade_SR218N.dtm
 2/21/2018  9:15 AM       775963 prop_surf_subgrade_SR218S.dtm
 2/21/2018  9:15 AM      2272003 prop_surf_top_SR218N.dtm
 2/21/2018  9:15 AM      1706613 prop_surf_top_SR218S.dtm