Tennesse-Tombigbee Waterway Hydromet Network
US Army Corps of Engineers, Mobile, Alabama

The Tennessee-Tombigbee Waterway (Tenn-Tom) connects the Tennessee River from near Nashville to the Gulf of Mexico at Mobile.

The waterway's Hydromet network collects remote field data and transmits it via a microwave-VHF network to provide real-time water management capability. Hydromet data is then integrated with other sources of information to provide streamflow forecasting and current runoff conditions for river and reservoir operations.

The Hydromet System is the waterway telecommunications system. All lock and dam sites, the waterway management office, and the Mobile district office are connected by a microwave backbone transmission system. Over 40 water quality measurement stations feeding an automated measurement system are connected by VHF links to the backbone.

The Howland Company designed both microwave and VHF radio transmission systems for intra-system telephone, two-way radio, computer-controlled water quality measurement, and supervisory/control and data acquisition (SCADA) systems. We designed the interconnection of the intra-system telephone network and two-way radio systems to the public switched telephone network. The scope of work included site selection, path profile preparation, interference analysis, noise budget preparation, transmission system reliability calculations, antenna/feeder system design, and multiplex and alarm system design. And we wrote the procurement specifications for the microwave radio, VHF radio and related systems.

On the web:

External Link  Tennessee-Tombigbee Waterway - US Army Corps of Engineers

External Link  Tennessee-Tombigbee Waterway Development Authority




Right: A diagram of the Tenn-Tom Hydromet microwave point-to-point network (red line), linking the Army Corps of Engineers Mobile Disstrict Office to Hydromet stations along the Tenn-Tom Waterway. Hydromet stations are at each Lock/Dam site (the = symbols) as well as several gaging stations. The network also includes VHF stations and repeaters linked to the microwave backbone.


Map of Tenn-Tom Hydromet microwave point-to-point network (red line) along the Tennesse and Tombigbee rivers and the Tenn-Tom Waterway in Alabama and Mississippi.

  Tennesse-Tombigbee Waterway, Heflin Lock & Dam Tennesse-Tombigbee Waterway, Aberdeen Lock & Dam Tennesse-Tombigbee Waterway, Wilkins Lock & Dam  
  Tenn-Tom Hydromet Antenna 01 Tenn-Tom Hydromet Antenna 03 Tenn-Tom Hydromet Antenna 02  
  Tennesse-Tombigbee Waterway, Fulton Lock & Dam Tennesse-Tombigbee Waterway, Stennis Lock & Dam Tennesse-Tombigbee Waterway, Montgomery Lock & Dam