utilities.iowadot.gov - /NHSX-030-6(231)--3H-06/CADD030(231)/Machine_Control_Surfaces/Ramps/US 218 Ramp D/TINs/

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 2/21/2018  9:15 AM       867504 prop_surf_subgrade_SR218D.tin
 2/21/2018  9:15 AM       996416 prop_surf_top_SR218D.tin