Floyds Fork is a 62.0-mile-long (99.8 km) tributary of the Salt River in Kentucky, directly south and east of Louisville. It begins in Henry Country near Smithfield, flows through eastern Jefferson County and flows into the Salt River near Shepherdsville in Bullitt County. Floyds Fork is named for John Floyd, an early surveyor of the area. During the Civil War, Confederate and Union forces skirmished on Floyds Fork and what is now US 60 (Shelbyville Road, locally) on October 1, 1862.
Floyds Fork lies in two 10-digit HUC watersheds, Upper Floyds Fork (HUC 0514010208) and the Lower Floyds Fork (HUC 0514010210) watershed in northwestern Kentucky, approximately 10 miles northeast of the city of Louisville. Ranging 62 miles in length, Floyds Fork originates in the southwestern portion of Henry County and flows southwest to unite with the Salt River in Bullitt County which then flows into Ohio River. Floyds Fork is a major tributary of the Salt River. Its drainage area is 285 sq. miles and is within the Salt River basin covering a significant part of central Kentucky. A total of 6 counties (Bullitt, Henry, Jefferson, Oldham, Shelby and Spencer) are located partially in the Floyds Fork watershed, thus making the watershed very important to a wide-range of communities. Figure 1-1 shows Floyds Fork, the Floyds Fork watershed, surrounding Counties and other features of the watershed (Tetra Tech, 2011).
 http://en.wikipedia.org/wiki/Floyds_Fork (2012)
 Tetra Tech (2011) Watershed Hydrology and Water Quality Modeling Report For Floyds Fork.