1. 
U.S. Department of Agriculture, National Resources Conservation Service (NRCS). National Engineering Handbook. Part 630: Hydrology, 1969-2001. Originally published as the National Engineering Handbook, Section 4: Hydrology. Available from the NRCS online at: http://www.nrcs.usda.gov/.
2. 
U.S. Department of Agriculture, Natural Resources Conservation Service. (1986) Technical Release 55: Urban Hydrology for Small Watersheds, 2nd Edition. Washington, D.C.
3. 
Pennsylvania Department of Environmental Protection. No. 363-0300-002 (December 2006), as amended and updated. Pennsylvania Stormwater Best Management Practices Manual. Harrisburg, PA.
4. 
Pennsylvania Department of Environmental Protection. No. 363-2134-008 (March 31, 2012), as amended and updated. Erosion and Sediment Pollution Control Program Manual. Harrisburg, PA.
5. 
Northampton County, Pennsylvania. Ordinance No. 629 (February 4, 2018), as amended and updated. Monocacy Creek Watershed Act 167 Stormwater Management Plan. Easton, PA. Available at: https://www.northamptoncounty.org/COUNCIL/Documents/Ordinance%20Adoption/2018/Ord629-2017%20-%20ACT%20167%20Stormwater%20Management%20Plan.pdf.
6. 
U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA). NOAA Atlas 14 Point Precipitation Frequency Estimates: PA, as amended and updated. Silver Spring, Maryland. Available from NOAA online at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds map cont.html.
7. 
Pennsylvania Department of Transportation. Publication 584, Chapter 7A (2010), as amended and updated Field Manual for Pennsylvania Design Rainfall Intensity Charts. Harrisburg, PA. Available from PennDOT online at: https://www.dot.state.pa.us/public/bureaus/design/PUB584/PDMChapter07A.pdf.