The Grand Pont here it is sometime in the past. The post card is entitled Grande-Rue-Duplessis, which indeed it was and still is but it is also a shot taken looking over the bridge. This card does not have a date and is not credited to anyone.
And here it is today (June 2017)
Quite a few changes to the houses, the railings look the same and the old lady has gone. Next is a similar post card from 5th September 1910 and by Eug. Texereau. In this one you can see the railings in more detail.
There are two bridges in Civray the other one is variously known as Le Vieux Pont, le Pont des Barres and indeed Le Vieux Pont des Barres. I presume that this bridge (Grand Pont) is therefore the newer one of the two.