Olgiati Bridge
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The P. R. Olgiati Bridge, often incorrectly called the "Ol' Johnny" or "Ol' Jolly", is a steel
girder bridge A girder bridge is a bridge that uses girders as the means of supporting its deck. The two most common types of modern steel girder bridges are plate and box. The term "girder" is often used interchangeably with "beam" in reference to bridge de ...
across the
Tennessee River The Tennessee River is the largest tributary of the Ohio River. It is approximately long and is located in the southeastern United States in the Tennessee Valley. The river was once popularly known as the Cherokee River, among other names, ...
in
Chattanooga, Tennessee Chattanooga ( ) is a city in and the county seat of Hamilton County, Tennessee, United States. Located along the Tennessee River bordering Georgia, it also extends into Marion County on its western end. With a population of 181,099 in 2020, ...
completed in 1959. It is named for former mayor and long time political boss of Chattanooga, P.R. Olgiati. Chattanooga was a growing city during the 1950s. To expand the city and to allow more ways to cross the Tennessee River, the P. R. Olgiati Bridge was one of multiple bridges built. The route carries
US 27 U.S. Route 27 (US 27) is a north–south United States Highway in the southern and midwestern United States. The southern terminus is at US 1 in Miami, Florida. The northern terminus is at Interstate 69 (I-69) in Fort Wayne, Indiana. F ...
across the Tennessee river.


Description

The P. R. Olgiati Bridge is located in
Chattanooga, Tennessee Chattanooga ( ) is a city in and the county seat of Hamilton County, Tennessee, United States. Located along the Tennessee River bordering Georgia, it also extends into Marion County on its western end. With a population of 181,099 in 2020, ...
. The bridge is one of several major bridges that crosses the
Tennessee River The Tennessee River is the largest tributary of the Ohio River. It is approximately long and is located in the southeastern United States in the Tennessee Valley. The river was once popularly known as the Cherokee River, among other names, ...
in Chattanooga. These bridges include the Walnut Street Bridge, Market Street Bridge, Veterans Memorial Bridge, and
Wilkes T. Thrasher Bridge The Wilkes T. Thrasher Bridge is a 4-lane road bridge located in Chattanooga, Tennessee. It opened in 1955 as a two lane road after much pressure from Wilkes T. Thrasher, a prominent Hamilton County Judge, to the Federal Government. In the 1980 ...
. The P. R. Olgiati Bridge carries a
controlled-access A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...
portion of US 27, which is a U.S. highway that travels south to north. The bridge crosses the Tennessee River just north of downtown, and links the freeway across the ridge en route to Signal Mountain and Red Bank. Surrounding the bridge is the
Tennessee Riverwalk The Tennessee Riverwalk is a 13-mile (21-km) Foreshoreway, riverside path which parallels the Tennessee River from the Chickamauga Dam to downtown Chattanooga, Tennessee. It is part of the Tennessee Riverpark System featuring the Tennessee Riverp ...
on the south side and just before getting to the bridge, US 27 crosses Riverfront Parkway.


History

A few years before the idea for the Olgiati Bridge became a discussion, the
Wilkes T. Thrasher Bridge The Wilkes T. Thrasher Bridge is a 4-lane road bridge located in Chattanooga, Tennessee. It opened in 1955 as a two lane road after much pressure from Wilkes T. Thrasher, a prominent Hamilton County Judge, to the Federal Government. In the 1980 ...
had been built in 1955 to provide a way of traveling across the Tennessee River. The Wilkes T. Thrasher bridge and others were built to help the growth of Chattanooga and to expand the use of the river, as well as to provide more ways of travel. Born a native Tennesseean in 1901, Peter Rudolph Olgiati, mainly known as P.R. Olgiati, was appointed to the City Commission and filled the seat of an unexpired term, and later became mayor of Chattanooga for 12 years. He supported the expansion of Chattanooga and building bridges was part of his plan. The bridge expansions were made to contribute to the growth of Chattanooga and to expand the use of the river, as well as to provide more ways of travel for anyone passing through the area.


Construction

From 1946 to 1951, P.R. Olgiati was appointed to the
City Commission City commission government is a form of local government in the United States. In a city commission government, voters elect a small commission, typically of five to seven members, typically on a plurality-at-large voting basis. These commissione ...
and was elected as mayor of Chattanooga and held his position as mayor for 12 years. Olgiati became a man with great authority, power, and responsibility. He ran many of the cities departments and could use his power as an advantage to improve the city. He began his term as mayor by working to draw the state and federal officials attention. After continuous efforts to gain the approval of federal and state officials, Olgiati was granted $100 million to build up the city. Because of his driven ideals, Chattanooga became the very first of any Tennessee major city to have a fully completed interstate system. The new bridge was mainly built because of the excessively used and overcrowded Market and Walnut Street bridges. The bridge was a steel girder bridge, known to be built because they are a high weight supported system. The girder refers to the
I-beam An I-beam, also known as H-beam (for universal column, UC), w-beam (for "wide flange"), universal beam (UB), rolled steel joist (RSJ), or double-T (especially in Polish language, Polish, Bulgarian language, Bulgarian, Spanish language, Spanish ...
s that are made up of steel plates that are placed together in order to hold the bridge up. Steel bridges are known to be more costly, but, when built, are much more effective and safe. Olgiati was given the resources to build a well built and supported bridge, which would greatly contribute to travel in Chattanooga. The site was approved in 1954, and construction began the next year. To begin the building process, about one thousand buildings had to be torn down and around 1,400 families had to move. The entire cost of the bridge was approximately $7 million (equivalent to $ in ). The bridge opened to traffic on November 20, 1959. Initially, the bridge was named Cedar Street Bridge, but soon after was renamed P. R. Olgiati Bridge in regards to Mr. Olgiati's efforts to expand Chattanooga.


Recent developments

Beginning in February 1999, the Olgiati bridge was widened from four to six lanes. This was accomplished by attaching extending steel beams to the top of the posts over the river. Also in this project, a ramp was added from the bridge on the north side to Manufacturer's Road, replacing a hazardous cloverleaf loop ramp which diverged past the bridge. The project, after many delays, was completed in February 2003. In 2011, TDOT announced a plan add two more lanes to the bridge. The groundwork for extra lanes was already done in the first widening project. The project has experienced many delays, but TDOT began widening the bridge in a reconstruction of the portion of US 27 in downtown Chattanooga (
Interstate 124 Interstate 124 (I-124) is an unsigned designation for a short segment of a controlled-access highway located in Chattanooga, Tennessee. During periods where this segment of U.S. Route 27 (US 27) has been signed as I-124, it has ...
) which began in late 2015, and is expected to be completed by 2020.


Gallery

Olgiati-opening-day-1959.jpg, Opening day of the bridge: November 20, 1959 Olgiati-opening-1959.jpg, Opening day of the bridge and corresponding section of highway Olgiati-2009.jpg, Crossing the Olgiati Bridge in 2009 I24bridgetennriver.JPG, The Olgiati Bridge from the Riverwalk Olgiati widening side.jpg, Widening of the Olgiati Bridge in progress, May 2019


See also

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References

{{Chattanooga, Tennessee landmarks Bridges over the Tennessee River Bridges completed in 1959 Bridges in Chattanooga, Tennessee Road bridges in Tennessee U.S. Route 27 Bridges of the United States Numbered Highway System Steel bridges in the United States 1959 establishments in Tennessee P. R. Olgiati Bridge