In NSW.
If in doubt...look up the area on local council mapping. Get an address of a place close to where you want to fossick.
Go to
https://shop.lpi.nsw.gov.au
Click on the top option in the left column "Title Searches and Records"
Then click the option "Street Address Inquiry " It is a FREE search
Follow the prompts
for example
I use a my local govenrment mapping tool...and roam the country.
Coles bridge area for example
you can see 2992 in the area west of the hairpin in the road
That is 2992 Turondal Rd Turondale.
I plug that into the Street Address Inquiry at Go to
https://shop.lpi.nsw.gov.au
and I get
In the left menu column you will see "Specialised Searches" open this in a new tab so you do not lose your search answers.
Go down the sub menu to "Property Location Map"
Plug your results from your first search into this one. This is another FREE SEARCH.
58/755800 this is a Lot and Plan number. The lot number is first.
enter your email and search away...the results are emailed to you in short time.
The results with give you a heap of DP numbers for the lots around your area, along with boundaries.
You can search each of these DP numbers for fun or research.
OR You can ring Department of Primary industry (DPI) Crown lands Section and ask them a ruling on a certain waterway using a DP number as reference.
They will tell you if that waterway is Crown Land ( Bed and Banks ) or if it is not.
This is the way to get the word straight from the folks that know for sure.
I hope this info helps someone....It is a pretty good tool for researching an area.
All you need is an address to start and you can kick on the a ton of helpful info.
edit...for those that want...there are paid searches as well.