Cogan House Covered Bridge (English Wikipedia)

Zacher, Susan M. (1994). The Covered Bridges of Pennsylvania: A Guide (2nd ed.). Harrisburg, Pennsylvania: Pennsylvania Historical and Museum Commission. p. 110. ISBN 0-89271-054-3.

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Federal Highway Administration (2009). "Place Name: Cogan House (Township of), Pennsylvania; NBI Structure Number: 417208078401120; Facility Carried: Cogan House; Feature Intersected: Larrys Creek". Nationalbridges.com (Alexander Svirsky). Retrieved December 10, 2011. Note: this is a formatted scrape of the 2009 official website, which can be found here for Pennsylvania: "PA09.txt". Federal Highway Administration. 2009. Retrieved December 10, 2011.
See the unformatted 2006 official National Bridge Inventory website for Pennsylvania: "PA06.txt". Federal Highway Administration. 2006. Retrieved January 11, 2011.
"Bridges by State and County: Tables of Frequently Requested NBI Information". United States Department of Transportation, Federal Highway Administration. August 2009. Retrieved January 12, 2011.

"Bridge Sufficiency Ratings" (PDF). Kansas Department of Transportation. Retrieved August 17, 2017.

Landis, Milton W. (1967). "The Larrys Creek Plank Road". The Journal of the Lycoming County Historical Society. IV (1, Summer). Archived from the original on November 18, 2005.

Federal Highway Administration (2009). "Place Name: Cogan House (Township of), Pennsylvania; NBI Structure Number: 417208078401120; Facility Carried: Cogan House; Feature Intersected: Larrys Creek". Nationalbridges.com (Alexander Svirsky). Retrieved December 10, 2011. Note: this is a formatted scrape of the 2009 official website, which can be found here for Pennsylvania: "PA09.txt". Federal Highway Administration. 2009. Retrieved December 10, 2011.

"NPS Focus". National Register of Historic Places. National Park Service. Retrieved December 13, 2011.

"Pennsylvania Cultural Resources Geographic Information System". Pennsylvania Historical and Museum Commission and Pennsylvania Department of Transportation. Archived from the original (Searchable database) on July 21, 2007. Retrieved June 1, 2012. Note: This includes Zacher, Susan M. and Pennsylvania Historical and Museum Commission. "National Register of Historic Places Inventory Nomination Form: Cogan House Covered Bridge" (PDF). Retrieved June 1, 2012.
2011 General Highway Map Lycoming County Pennsylvania (PDF) (Map). 1:65,000. Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division. Archived from the original (PDF) on December 20, 2016. Retrieved December 12, 2011.

For example, during flooding caused by Hurricane Agnes on June 22, 1972, a stream gauge at the nearby village of Cogan House measured discharge 105 times the average, with a peak stream height of 5.29 feet (1.61 m). See: United States Geological Survey. "USGS 01549780 Larrys Creek at Cogan House, PA". Charts, Graphs, Map. Retrieved May 19, 2008. The clearcutting of the 19th century caused floods that were worse.

"Pennsylvania Cultural Resources Geographic Information System". Pennsylvania Historical and Museum Commission and Pennsylvania Department of Transportation. Archived from the original (Searchable database) on July 21, 2007. Retrieved June 1, 2012. Note: This includes Zacher, Susan M. and Pennsylvania Historical and Museum Commission. "National Register of Historic Places Inventory Nomination Form: Cogan House Covered Bridge" (PDF). Retrieved June 1, 2012.
2011 General Highway Map Lycoming County Pennsylvania (PDF) (Map). 1:65,000. Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division. Archived from the original (PDF) on December 20, 2016. Retrieved December 12, 2011.
Landis, Milton W. (1967). "The Larrys Creek Plank Road". The Journal of the Lycoming County Historical Society. IV (1, Summer). Archived from the original on November 18, 2005.

Baumgartner, Nancy E. (1998). Cogan House Township, Lycoming County, Pennsylvania: The 1900s. Columbia Cross Roads, Pennsylvania: RCW Publishing Co. OCLC 43445677.