The Chesapeake Bay and Delaware River were now connected by a navigation channel measuring nearly long, deep, wide at the waterline and wide along the channel bottom. A covered wooden bridge at
Summit, Delaware, spanned the canal across the "Deep Cut", measuring between abutments. The bridge floor was above the channel bottom. Three wooden
swing bridges also crossed the canal.
Locks to pass vessels through the waterway's various levels were constructed at
Delaware City, Delaware and
St. Georges, Delaware, and two at Chesapeake City. Each measured long and wide and was eventually enlarged to in length and in width. Teams of mules and horses towed freight and passenger barges,
schooners and
sloops through the canal. Cargoes included practically every useful item of daily life:
lumber,
grain, farm products, fish,
cotton,
coal,
iron, and
whiskey.
Packet ships were eventually established to move freight through the waterway. The
Ericsson Line operated between Baltimore and Philadelphia, and continued to carry passengers and freight through the canal into the 1940s. The cargo tonnage peaked in 1872 with more than 1.3 million tons transiting the canal. Along the route across the top of the Delmarva Peninsula, at least six lighthouses warned barges and other vessels passing through the canal when they were approaching bridges and locks. These small wooden lighthouses had had red lanterns mounted atop them. The Ericsson Line of steamboats originated as steamers built for freight only; however, the line converted to passenger boats during 1876 at the time of the
Centennial Exposition in Philadelphia as the demand for travel increased. The Baltimore and Philadelphia Steamship Companies, which operated the Ericsson line, built and furnished ships with seventy to eighty staterooms in addition to the freight facilities. In turn, these ships grew from less than one hundred to more than six hundred tons and greatly increased travel from Baltimore to Philadelphia. The Ericsson Line was named after its first ship, Ericsson, which was named after John Ericsson who developed the screw
propeller that was installed on the vessel specifically designed for the Chesapeake & Delaware Canal. Ericsson was built at Reanie & Neafie's shipyard in Philadelphia by Anthony Groves, Jr. The ship, finished in 1843, was in length and weighed eighty tons. It began operations in 1844 under the direction of Captain Noah F. Ireland. The Ericsson Line operated out of Baltimore's No. 1 Light Street Pier for 75 years, serving passenger and freight demands throughout the waterway with thirty registered steamers. The Ericsson Line's success brought utility and prosperity to the canal and promoted an expansion of trade by means of its growth and connection to the Atlantic Deeper Waterways Association of the Chesapeake & Delaware Canal. Loss of water in the locks was a problem from early on. As boats passed through at Chesapeake City, the equivalent of a full lock of water was lost to the lower-lying portion of the canal. This loss, compounded by leakage through the canal banks and normal evaporation, made it necessary to devise a means of lifting water into the project's upper part. A steam operated pump was purchased in 1837 to raise water from Back Creek, and in 1852 a
steam engine and large
waterwheel were installed at the pumphouse in Chesapeake City. Measuring in diameter and wide, the iron and wood waterwheel had 12 troughs which filled with water as it turned; the water then spilled over the hub into the raceway and into the uppermost canal level. By 1854 a second steam engine was in use. The two engines consumed eight tons of coal daily while lifting 170 tons of water per minute into the canal. The waterwheel and steam engines remained in continuous use through the mid‑1920s. Throughout the 19th century, the canal's use continued to change with the
New Castle and Frenchtown Turnpike and Rail Road being its only major competitor. Steam power brought larger and deeper-draft vessels that could not pass through the restricting locks. By the turn of the 20th century the decline in canal traffic and cost of operation and repairs reduced canal profits. Clearly a larger, wider, and deeper waterway was needed. At the time, however, little thought was given to improving the existing canal. New companies were formed instead, considering at least six new canal routes, but committees and commissions appointed to study the issue failed to agree on a plan. In 1906
President Theodore Roosevelt appointed a new commission to report on the feasibility of converting the canal to a "free and open waterway." == 1920s to 1970s ==