Background Report

In this section:

 

Environmental Constraints
Steep hillsides and floodplains are the foremost considerations. These features are depicted on the environmental constraints and least constrained land map. (See Map 4.) Underground caverns, which are associated with limestone geologic areas, can present development problems in portions of the Central City.

Topography: Rising to 1,370 feet, Sharps Ridge is the most prominent topographic feature. A series of small ridges, running northeast to southwest, separate various neighborhoods. Steep slopes, those exceeding 25 percent, characterize about 5 percent of the land. Such hilly areas are typically undeveloped, although several severe cuts such as those at Sharps Gap have been made to accommodate nearby projects. In a few instances, such as the area north of Texas Avenue, there are platted lots that have never been developed because of the steep topography. Conservation of significant portions of the steep slopes is important in reducing erosion, maintaining forested areas and habitat, and protecting water quality.

Sharp's Ridge

Sharps Ridge: most of its hillsides are intact and views from the ridge are outstanding.

Hydrology: First, Second and Third Creeks are the major streams. Historically, these stream corridors were locations for railroad and highway facilities, and industrial and highway-oriented commercial development. Large areas devoted to parking, storage yards, and commercial and industrial operations have been created near the creeks and are significant sources of pollution. The creeks have the worst water quality among Knox County streams. Industrial and household-related yard chemicals, oils, metals and bacterial contaminants are the typical pollutants. The Tennessee Department of Environment and Conservation has posted biological hazard warnings along many sections of the streams.

Flooding: The high percentage of impervious surfaces results in rapid runoff and a quick buildup of floodwaters. There have been significant expenditures to solve flood problems in the 1990s, including channeling First Creek. Upstream impacts, especially Murphy Creek and White Creek, can have impacts on the First Creek system. This has implications for basin-wide land use and storm water control.

Other Issues: Chemical contamination of soils has been a problem in a number of places. These include industrial areas along Second Creek, and such sites as former gas stations.