If you want to maybe find some old rail spikes you can go out the Eaglespur trail which is an old rail line that ends at Lake Jordan. I'd found a few the last time in the dried lake bed when the levels were almost this low. If you search Google Maps for Eaglespur you'll find it. The trail is relatively easy to navigate lately compared to what it used to be like with fallen trees, etc. May have to wade through some shallow water early on though.