The source of Larrys Creek is in Cogan House Township, just south of the hamlet of Steam Valley.

A petition from the citizens of Cogan House Township for a bridge to be built was filed on September 4, 1876.

[5] The 90-foot-long (27 m) Burr arch truss bridge was built in 1877 and rehabilitated in 1998,[6] and is on the National Register of Historic Places.

[7] Larrys Creek was vitally important to the economic development of Cogan House Township.

Cogan was one of the few settlers in the area for many years, but wearying of his isolation, he left his homestead in 1842, as did a neighbor named Carter.

James Wood, Isaiah Hayes, F. Whitlock and Mr. Schuyler operated some of the earliest local mills.

Many grew into villages where a horse could be shod, supplies bought at the general store, mail and newspapers picked up, a vote cast at election time and gossip exchanged.

By 1900 Cogan House Township was home to five churches, five post offices, seven schools, two general stores and a thriving population.

During the 20th century this mostly agrarian society was redefined through war, modern transportation, better roads, advanced communication systems, the lure of higher wages in far away places, and the consolidation of schools and churches.

[1] Larrys Creek rises near Steam Valley and proceeds southwestward through the township on its 25-mile (40 km) journey to the West Branch of the Susquehanna.

Hoagland Run, in the southeastern part of the township, flows southeastward to Lycoming Creek, another tributary of the West Branch.