When it was first washed out, access was available via Mayan Palace. If Mayan is still cooperating (and I would think they are), you can take the Mayan entrance; then turn westward to the Miramar / Dorada road (through Mayan's service gate), and past Miramar to enter Dorada from the east side. I have no idea if the Miramar / Dorada road is accessible yet from the Caborca Road.