Digging bees - possibly Colletes species

These little guys can dig quite fast. I believe this one is probably a female, as what I read indicated that males do not collect pollen. They are more likely to be Colletes than Andrena, as there were a large number nesting quite near one another. Andrena don't usually do this.
So far BugGuide says no… Andrena cf barbilabris, which I take to mean that the person thinks that this is likely to be an
A. barbilabris, but isn't willing to commit to that 100%