I am just going by what popped into my mind but I think Colorado changed their rules to allow anyone over 18 to access their birth records if birth mom agrees. If you could prove or 'the daughter' that her mom was deceased, perhaps you could get some info. You might check out the State of Colorado website and see if there is some place that could steer you in the right direction. I know things used to be a bit easier before all this privacy thing started.