South Atlantic Water Science Center

Chattahoochee River BacteriAlert: Medlock Bridge Site

Medlock Bridge site description:

Go to real-time info for this station (opens a new window). Real-time USGS river flow and stage (river height) for this site.

Sampling location:

The Medlock Bridge site is the northernmost site in this project, where bacteria samples are being collected by the National Park Service. The sampling site is USGS station 02335000, Chattahoochee River at Norcross, which is at Medlock Bridge Road, a large four-lane divided highway. The left picture shows. The right picture shows the surrounding area on the other side of the bridge.

The USGS monitoring equipment on the downstream side of the bridgeThe surrounding area on the other side of the bridge

Use of the river

Use of the Chattahoochee River at the Medlock Bridge site is less intense than at the Paces Ferry site. Fishing is one popular activity, and boaters (left picture) are often seen. The lack of shoals and trails at Medlock Bridge mean that people don't visit the site as much as at other locations along the river. But, just a little ways downstream is the National Park Service's Jone's Bridge Unit, which is very heavily used by picnickers, waders, hikers, and dog-walkers.

Fishing is one popular activity, and boaters are often seenBirds and other wildlife frequent this site.

Surrounding area

The immediate area consists of suburban residential and large highways, such as Hwy 141, shown in the left picture. There is a lot of growth occuring along the highway, and much of the land will see commercial and office developments occur in the coming years. Since the immediate area does not consist of public parks and land reserves, such as at the National Park Service units further downstream, more of the land consists of nonpermeable cover, such as roads, parking lots, and houses.

The right picture shows a storm sewer outfall pipe, which is located next to the bridge on the upstream side. Although storm water off of the adjacent land mainly runs into the river along the banks, the sewer is a point-source location for direct runoff for debris, oils, and other matter from Hwy 141. Runoff from roads is a concern, as it can detrimentally affect water quality, which is a special concern for a highly-used river such as the Chattahoochee.

The immediate area consists of suburban residential and large highways, such as Hwy 141.a storm sewer outfall pipe, which is located next to the bridge on the upstream side

Find out about the Paces Ferry sampling site