The year 1836 saw several milestones. The P&DC opened its first segment of track; saw its allowable expenditures upped by the State to $400,000; and changed its name, on March 14, to The Philadelphia, Wilmington and Baltimore Railroad Company. On July 4, the PW&B began building its bridge over the Schuylkill River, the most significant obstacle on its part of the route. The bridge would cross at Gray's Ferry Bridge, south of the city. Meanwhile, on April 18, the D&M merged with the W&S, forming the Wilmington and Susquehanna Railroad Company.