It seems to me that you should have just contacted the relevant authorities for a more detailed consultation. But if you have solved the situation yourself, I am sincerely happy for you!
Recently, I myself had a rather difficult situation. The stairs that led to the backyard broke down. I've never repaired stairs, so I didn't even know where to start and what material to use. Everything turned out only thanks to the Internet. I used an article about the construction of steps of stone https://trimthatweed.com/how-to-build-stone-steps/ . I am quite satisfied with the result.
It's good that nowadays you can find out everything online!
It seems to me that you should have just contacted the relevant authorities for a more detailed consultation. But if you have solved the situation yourself, I am sincerely happy for you! Recently, I myself had a rather difficult situation. The stairs that led to the backyard broke down. I've never repaired stairs, so I didn't even know where to start and what material to use. Everything turned out only thanks to the Internet. I used an article about the construction of steps of stone https://trimthatweed.com/how-to-build-stone-steps/ . I am quite satisfied with the result. It's good that nowadays you can find out everything online!