This bridge is listed as a concrete girder bridge in the National Bridge Inventory, but in these photos, it appears to be a concrete arch. The bridge really is a concrete girder structure. The arch structure is a decorative element that hides the interior structure of the bridge. This makes for a very nice look in that the bridge has the classic lines of an arch bridge combined with the art deco era concrete details.
The 1867 route of the Saint Paul & Pacific Railroad was mentioned in relation to some of the bridges near Saint Albans Mill. That railroad route crossed to the south side of the Minnehaha Creek near the mill site, then continued east across the creek again at the location of this bridge, then crossed the present day route of US-169 just south of the interchange with Minnetonka Boulevard. The route is not visible on the ground in this area, but you can see ghost lines on aerial photos for the old railroad route. The route does become visible just east of US-169 at the south end of Hillsboro Avenue where an old channel of the creek has been cut off by the railroad embankment.
The photo above is looking east down the length of the bridge deck from the eastbound traffic lanes.