An inventory of the district in 1973 listed more than 365 historic resources, many of which were associated with wealth created by the lumber industry.

Simpson House (between 1872 and 1880), a three-story brick dwelling covered with wood made to look like dressed stones.

[2] The district is bounded roughly by the river on the north; North Henderson Street on the east; Bellefonte Avenue, Mary's Alley, and the Penn Central Railroad right-of-way on the south, and Sixth Street on the west.

[n 1][2] The NRHP is the official federal list of properties of architectural, archeological, cultural, or engineering significance in U.S. history.

Benefits of listing include qualification for federal historic-preservation planning and, if available, funding, as well as possible tax relief.