There sure is. The info you seek is in the Washington DB. I believe there is also some information in the WIKI for Washington. If your scanner has a service search feature, you might want to scan the marine band.
The CG operates on the standard marine channels assigned to them. However they do have some specific frequencies that they use in the MIL bands but they always seem to use encryption. Therefore you won't be able to hear them. The FedGov section of the WIKI has various frequencies listed for the CG. Listen to Marine channel 22a for marine related emergencies where the the CG is communicating with public or commercial vessels. Another active channel for them is channel 23 as I remember.