Could I port this site across to WordPress

Hi,

I am currently in the process of moving a clients site which I had a hand in developing way back in 2003 to a different host and in the process have had thoughts of updating the site to use a CMS like WordPress.

The site itself is https://www.rccdams.co.uk if anyone wants to visit it. I realise it looks very dated now, but that’s what partly led me to think of proposing a full update to the client.

At the heart of the site is a searchable database of dams that the client has designed around the world. The database is in MySQL and the site uses PHP to query the database and build the search results page.

The news page also has it’s own table in the database.

The database is updated via a password protected admin area.

Everything else in the site is static HTML.

Now I know that the news could be ported across quite easily to WordPress as blog entries, and the static pages could also easily be added as pages, but at the heart of what I’m asking is how easy (or indeed feasible) would it be to integrate the functionality to allow the searchable dam database to work within a WordPress site?

Thanks in advance for any help.
If anyone needs more info please let me know.

Tony.