R.S. Riser's original design was a Parker Pratt bridge, as selected by the bridge committee.
It consisted of three 200 foot (61 m) spans.
Each span consisted of ten 20 foot (610 cm) long panels, where each panel met there were 15 inch (381 mm) I-beams between the trusses which held the stringers supporting the deck panels.
R.S. Riser's original design was a Parker Pratt bridge, as selected by the bridge committee. It consisted of three 200 foot (61 m) spans. Each span consisted of ten 20 foot (610 cm) long panels, where each panel met there were 15 inch (381 mm) I-beams between the trusses which held the stringers supporting the deck panels.
Lyndon Bridge