Is the beach below the cliff on main street accessible?

In Animal Crossing: New Leaf is it possible to get to the beach below the cliff on Main Street if I build a bridge on the beach in the residential area?

I just got a wet suit tonight and attempted swimming to the "Main Street" area. There was a section of beach in my village that was previously inaccessible because I could not build a bridge there, but I was able to swim to it. Unfortunately, the beach ends abruptly with a cliff blocking access past the railroad bridge.

There are also very conspicuous boulders in the ocean blocking access towards Main Street, so it seems this is impossible (by design) by means of diving/swimming.

I finished my first bridge public works project last night, so I decided to try and see if I could build my second one on the beach in the residential area.

However, as soon as you go to the top of the ramp to the beach and try to walk down, Isabelle stops you, saying "What's the matter, Mayor? Let's finish our work first!" She also says this if you attempt to head to Main Street, the Train Station, or other areas.

In addition, there's nothing mentioned in the Main Street article on Nookipedia that mentions any of the upgrades/new stores letting you have beach access. Given that there's no way to get down to the beach from Main Street, you're blocked from building a bridge from your own beach, I don't believe there's a way to access this.