My building site is located on the end of a very sligt incline on a dead end street. So naturally once a while my site gets flooded. Im also located very near the sea. The site used to be a beach before a road pushed the waterfront back 50m. What would be a good way of getting rid of water. This might be impossible completely but atleast a systen that can hold a large amount of water and keepit away from my planned foundation.im thinking of proposing the municipality a solution if i can find one,to build under the road or walkway during construction.my site is unfortunatly impassable from my foundation. Ill try to draw some thing up tonight to show you guys.

Best it to divert water to a storm drain. If the only access to such a drain is uphill, then you need to pump.

thank you for your reply. I think the storm drain fails most of the time in excess of water. Thats why the street gets flooded. I dont think the municipaliry is going to do anything about it any time soon. They would have to repipe most of the neighbourhood im more looking for a backup plan for my street.

you're near the ocean, which is rising, so there is the very real potential for flooding from that. You're also at the lower end of a street with poor drainage, so flooding from that is guaranteed. The solution, increasingly common and often required with beach houses is to build an elevated house on pilings. Build the driveway and fill under the house with washed stone which drains well and is useable when wet.

We dont get much tides. Only durig storms some sewedge pipes back flow. I realy dont trust the municipality pipes. I have attached some images of the site. Im thinking of buildin some deep planters filled with gravel and rubble that reach a litle bellow the foundation. They would be 4-5m away from my foundation that water will drain away from my site (red) these should hold and direct water over flow deeper underground

Im not shure if i should connect this to the city mains via my site (green). This has a chance of flowing back to the problem area. Maybe a deep well that i could then pump across my site to the city mains after the storm but then i fear that im so close to the sea that ill just be pumping sea water.

I agree than an elevated house (using piers or a crawl space) would be best. Simple and effective.

You can build barriers/berms at the surface level and french drains + pumps near the house to move water outside the barrier. Somewhat like a leaky boat with a bilge pump.

I doubt you will be able to create enough volume to catch and store all the storm flow.