The crossing of the Edendon Water above Dalnacardoch on the A9 is not really a bridge. Taking a dual carriageway over a small stream doesn't require the expense of a bridge, instead a very large culvert has been constructed, large enough to take a Land Rover Track through alongside the stream! The crossing point is, however, an ancient one originating with General Wade's Military Road from Dunkeld north to Inverness over 250 years ago. Whether he built a bridge or not is not known, as he favoured fords on cost grounds whenever possible. However, when the road was improved in the early 19th Century, a bridge would certainly have been present.
Possibly the site of the old bridge
The Bridge that was built in the 1920s was a classic Owen Williams Design, as seen on the Old A9 route between Inverness and Blair Atholl. It was very similar to the bridge built at Crubenmore, further north, but was much taller and only had a single arch. When the A9 was improved in the 1970s and 1980s, a large dual carriageway was planned between Dalnacardoch and Dalnaspidal with the northbound carriageway directly following the old road in several places. Due to the geography of the area and the bends of each carriageway crossing the water, the old bridge was all but demolished to make way for the Culvert that is in place today. The Dual carriageway opened in December 1979.