Obtained shape file from NOAA C-CAP site (currently promoted on esri.com). Downloaded Zip file which appears to have requisite parts (.shp, .dbf, .prj etc). File is large--too big to add to web map, so added as a feature service. AEO accepts Zip, chews on it awhile then fails with 'Failed to publish csv'. Added using Firefox and ArcGIS Online for Org acct.
Zip file too large to attach - 1,900 Kb. can email if needed.
thx