Underground city beneath Chattanooga is more than a curiosity

SEEKING HIGHER GROUND

As devastating floods chronically ravaged young Chattanooga, residents and business owners took it upon themselves to keep their city on dry land.

March 7-11, 1867 -- Rain falls for four days, ushering in the largest flood in city history. The Tennessee River crests at nearly 50 feet -- 28 feet above flood stage -- inundating downtown. "This calamity should rather be an incentive to new efforts," a newspaper article states, saying that city leaders plan to have "the grade of every street in Chattanooga ... raised to a sufficient height above the level of this flood to preclude the possibility of any part of the city ever being again submerged."

March 1875 -- The river reaches over 20 feet above flood stage, with a crest higher than 42 feet. After this flood, city leaders agree something more drastic has to be done, and they begin weighing the idea of building a levee or raising the grade of the soil.

April 1886 -- More than 4,000 suddenly homeless residents are taken by boats to higher ground at Lookout Mountain and Missionary Ridge as the river crests at over 20 feet above flood stage.

April 10, 1886 -- An editorial in the Chattanooga Daily Times bemoans the haphazard process of raising the city's street level. "We have hitched up a corner here, a block there and part of a block yonder, each bringing a lawsuit for damage ... confusing builders so they cannot tell what height to put their first floors."

March 1917 -- The river crests at about 18 feet above flood stage. Many homes and businesses are flooded, with water skimming rooflines along Rossville Boulevard.

1920s -- The U.S. Army Corps of Engineers surveys several sites for a possible dam to protect the city from floodwaters.

May 1933 -- President Franklin D. Roosevelt establishes the Tennessee Valley Authority, which begins to harness the river through the construction of dams over the next decade.

Repairing Hydraulic Jacks - News


Fracking debate divides New York landowners
Fracking debate divides New York landowners

A hydraulic fracturing, or fracking, operation takes place on leased farmland near Dimock, Pa., where dairy farms once predominated. (Carolyn Cole, / December 27, 2011) By Neela Banerjee, Washington Bureau Pete and Jack Diehl grew up



Battling Mother Nature to Keep Wider Beaches

By Jack Fichter GALLOWAY— A stable shoreline and wide beaches support tourism and recreation and prevent storm damage of properties, loss of infrastructure and wildlife habitat. Steven Hafner, assistant director for Coastal Research Center,



Fracking debate divides New York landowners
Fracking debate divides New York landowners

A hydraulic fracturing, or fracking, operation takes place on leased farmland near Dimock, Pa., where dairy farms once predominated. (Carolyn Cole, Los Angeles Times / December 27, 2011) By Neela Banerjee, Washington Bureau Pete and Jack Diehl grew up



Underground city beneath Chattanooga is more than a curiosity
Underground city beneath Chattanooga is more than a curiosity

Cox, an environmental consultant and senior project manager with Barge, Waggoner, Sumner and Cannon, recalls being called in to remove the car hydraulic jacks that had been mounted in the basement of the dealership on Market Street near where the



A challenging repair

To do the work, they had to beam everything up and used hydraulic jacks. A Skytrak was brought in to set the new pillars. “We're really happy with it,” Hendricks said of the finished product. “There were many, many hours of thought and preparation.




Repairing Hydraulic Jacks - Bookshelf

Hydraulic control systems

Hydraulic control systems

The use of hydraulic control is rapidly growing and the objective of this book is to present a rational and well-balanced treatment of its components and systems.

The hydraulic handbook

The hydraulic handbook

The ninth edition of the Hydraulic Handbook incorporates all these developments to provide a crucial reference manual for practical and technical guidance.

Practical hydraulic systems, operation and troubleshooting for engineers and technicians

Practical hydraulic systems, operation and troubleshooting for engineers and technicians

It discusses Hydraulic Systems construction, design applications, operations, maintenance, and management issues and provides you with the most up-to-date information and Best Practice in dealing with the subject. * A focus on maintenance ...

Hydraulic modelling, an introduction : principles, methods and applications

Hydraulic modelling, an introduction : principles, methods and applications

Considering the advantages and limitations of both physical and mathematical methods, this book will help you identify the most appropriate form of analysis for the hydraulic engineering application in question.

Hydraulic servo-systems, modelling, identification, and control

Hydraulic servo-systems, modelling, identification, and control

The book is very application-oriented and provides the reader with detailed working procedures and hints for implementation routines and software tools.Hydraulic Servo-systems will interest scientists and qualified engineers involved in the ...