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Bureau of Environmental Services (2008). "General Description". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on September 30, 2012. Retrieved June 4, 2008.
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web.archive.org
Bureau of Environmental Services (2008). "Land Use and Population". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on October 13, 2012. Retrieved June 11, 2008.
Bureau of Environmental Services (2008). "Streams & Water Bodies". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on October 13, 2012. Retrieved June 9, 2008.
Bureau of Environmental Services (2008). "General Description". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on September 30, 2012. Retrieved June 4, 2008.
Bureau of Environmental Services (2008). "Stormwater Conveyance". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on October 13, 2012. Retrieved June 6, 2008.
"Forest Park". Portland Parks and Recreation Department, City of Portland. 2008. Archived from the original on August 18, 2008. Retrieved July 18, 2008.
Portland Parks and Recreation Department (2008). "Macleay Park". City of Portland. Archived from the original on August 10, 2015. Retrieved May 6, 2008.
Bureau of Environmental Services (2008). "Rainfall Summary Table". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on September 30, 2012. Retrieved June 10, 2008.
Bureau of Environmental Services (2008). "Habitat and Biological Communities". Willamette Subwatersheds: Balch. City of Portland. Archived from the original on September 30, 2012. Retrieved June 12, 2008.
Portland Parks and Recreation Department (2012). "Heritage Trees by Location". City of Portland. Archived from the original on August 6, 2015. Retrieved March 29, 2012.