In 1920 the bridge deck needed repair. The repairs were completed and the bridge repainted, marking the last time Lyndon Bridge was painted. In 1939 the south pier began to settle into the riverbed. The concrete piling and some of the concrete inside the pier's steel casing was deteriorating. The dilapidated concrete in the casing was replaced and a new concrete footing was poured. In 1968 the abutment on which the bridge's south approach rests was repaired and a new deck installed at a cost of $6,800. The deck was again replaced in 1976 for an additional $4,500.