These are between 520 and 600 deep round timbers. Timber palings were used as sacrificial formwork. The concrete deck was returned down the back of the beams against traditional gravel boards. The substructure is timber capwales supported on timber piles resting on a sill log. This bridge has now served 21 years old on a low use road.
Maintenance appears to have been very low.
All the timber elements appear in very good condition, except where they are open to the weather or to ground moisture. The piers appear to be in good condition. We load tested the bridge and the results are set out in Figure 2 below. The span to deflection ratio for the bridge centrally loaded with a 20 t. gravel truck was about 1 in 1200, while it was about 1 in 950 for loading on the side of the bridge. Generally deflections were symmetrical.