Navigation on Savanah River?

In reality, you can probably go till the depth gets to 35 inches. Of course now you have hit the bottom.

You should be looking at navigation charts for that river. It will give you what you need.

Since the Savannah River flows to the Atlantic Ocean, tides will affect the water depth. If you go upriver at high tide in 36 inches of water, when the tide ebbs you will be aground.

Tides also affect the current which can be very strong both upstream and downstream.

Inland waterways charts, and tide and current tables are a must for safe navigation.

dobs108 - Garmin GPS 76 - nuvi 760

I'm not familiar with the Savannah river, but if it's considered a navigable waterway and maintained by the army corp of engineers, such as the Mississippi river is, they maintain a minimum channel depth. On the Mississippi it's nine feet.

If they do maintain it I would check with them.

You can go upriver all the way to the Augusta Ga lock and Dam.

That is a long way!

dobs108