A level spreader is an erosion control device designed to reduce water pollution by mitigating the impact of high-velocity stormwater surface runoff. It is used both on construction sites and for permanent applications such as drainage for roads and highways. The device reduces the energy level in high-velocity flow by converting it into sheet flow, and disperses the discharged water so that it may be infiltrated into soil.  
- U.S. Army Corps of Engineers. Construction Engineering Research Laboratory. Champaign, IL. "Level Spreader." USACERL Special Report 107-98. Accessed 2009-04-09.
- Massachusetts Department of Environmental Protection. Boston, MA. "Erosion and Sediment Control Guidelines for Urban and Suburban Areas." May 2003. p. 109.