Yes, but that is only in those situations where the pontoons were present. It doesn't mean that the engineers brought them with them.
For a good example of a pontoon bridging operation see the Wagram game - the full two day scenario. There you can find where I had several zero strength bridges already on the map - the site for the pontoon bridges (of which there were small and large sizes).
I add in zero strength bridge locations on a lot of the maps. Plenty of places in the games to build a bridge. No, you cant just pick and choose but remember that not all places were good locations for a pontoon bridge either.

Lots of things missing in ALL of the game series. One programmer - many series ... no way John could ever add in everything.
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Generalfeldmarschall Wilhelm Prinz Peters von Dennewitz
3. Husaren-Regiment, Reserve-Kavallerie, Preußischen Armee-Korps
Honarary CO of Garde-Ulanen Regiment, Garde-Grenadier Kavallerie
NWC Founding Member
For Club Games: I prefer the Single Phase mode of play. I prefer to play with the following options
OFF:
MDF, VP4LC, NRO, MTD, CMR, PR, MIM, NDM, OMR (ver 4.07)