Why Dam w/o suitable tile where to build? Screenshot

[er_veneco]

Hi,

No dam in the hex with the red X?

-The river passes through two borders of the hex
-no other dam down the river (one or two unseen hexes and it opens into the sea)
-floodplain
-no mods

Two screenshots, one in strategic view, one in normal view

Help?

 

[Zyxpsilon]

I think that Farm must be removed before DAM could be started.

 

[iammaxhailme]

Could there be another dam on the same river further down?

 

[Linklite]

Is that the East Asia map? Others have been saying that rivers have been bugged on real life maps and go unnamed. This messes with the dams so you can't build them (the check is probably that the rivers don't share names, no names means it doesn't pass the check, blocking dams).

 

[KingPiggyXXI]

Dams should usually be able to remove any farms if you build them on top of one.

It looks like there's a floodplain here, but it's actually not connected to a river - normally, it says something like "River(s): <River name>". This is likely a reason why you can't build a Dam here, because this floodplain isn't connected to a river, and there's technically no river for you to dam here.
Guessing from the map you have, you're in a TSL map? From my understanding, the TSL maps all have a problem with these floodplains, and you can't place Dams anywhere on them. Could you check if there's a similar problem with placing Dams on other rivers?

 

[Linklite]

Dams should usually be able to remove any farms if you build them on top of one.

It looks like there's a floodplain here, but it's actually not connected to a river - normally, it says something like "River(s): <River name>". This is likely a reason why you can't build a Dam here, because this floodplain isn't connected to a river, and there's technically no river for you to dam here.
Guessing from the map you have, you're in a TSL map? From my understanding, the TSL maps all have a problem with these floodplains, and you can't place Dams anywhere on them. Could you check if there's a similar problem with placing Dams on other rivers?

It's not TSL, he's playing as England, but I'm pretty sure it's East Asia map and, as you said, they're bugged so rivers aren't registered at the moment, meaningndams can't be built.