engineering

Tri-State Corner

Tri-State Corner is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tri-State Corner rather than just read about it. In short: Tri-State Corner is the local name for the tripoint between the U.S. states of Tennessee, Georgia, and Alabama. The tripoint is located at the base of a mountain about 200 yards (180 m) south of Nickajack Lake, an impoundment of the Tennessee River.

Key takeaways

Tri-State Corner belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tri-State Corner to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tri-State Corner from memory before moving on to harder problems.

Reference excerpt

Tri-State Corner is the local name for the tripoint between the U.S. states of Tennessee, Georgia, and Alabama. The tripoint is located at the base of a mountain about 200 yards (180 m) south of Nickajack Lake, an impoundment of the Tennessee River. It is accessible from a nearby cemetery via a short trail.

Location In addition to being the tripoint between Tennessee, Georgia, and Alabama, the marker is also the northwesternmost point in Georgia and the northeasternmost point in Alabama. The portion in Tennessee is on land owned by the Tennessee Valley Authority (TVA), and the Georgia and Alabama portions are on private land. The marker is located in Marion County, Tennessee, Dade County, Georgia, and Jackson County, Alabama, and about 15 miles (24 km) west of downtown Chattanooga, Tennessee. In addition, the portions of the tripoint in Tennessee and Alabama are located within Central Time Zone and the Georgia portion is located in Eastern Time Zone. The tripoint is the western end of a short segment where the boundary between Central and Eastern Time follows the Tennessee-Georgia border.

History The present location of the tripoint is the result of an erroneous 1818 survey, led by mathematician and University of Georgia professor James Camak, that was commissioned by the state of Georgia to determine the exact location of the border between Georgia and Tennessee after the Alabama Territory had been created by Congress the previous year. The southern border of Tennessee was declared to be located on the 35th parallel north when Tennessee was established as a state by Congress on June 1, 1796, which is approximately 1 mile (1.6 km) north of the present-day tripoint. This would have allowed a small portion of the Tennessee River to be located in Georgia. As a result of this error, Georgia continues to dispute the location of the border with Tennessee. A second survey was conducted by Camak in 1826, which resulted in little difference from the 1818 survey. During this survey, Camak placed a stone at the tripoint, which became known as the "Camak Stone". This stone disappeared in the fall of 2009, believed to have been stolen. A new marker was placed at the tripoint on March 1, 2011. This marker consists of a short concrete piling with a round brass placard on the top denoting the location of the tripoint and the state boundaries. This marker was stolen during the first quarter of 2021. Currently, the monument consists of a square set stone with the respective state lines denoted without labels. An identification sign placed by the owners of "Paradise Pointe Resort" is nearby.

See also List of tripoints of U.S. states

References

Illustrations

Worked examples

Example 1 — a first encounter with Tri-State Corner

Start with the simplest possible case. Write down what Tri-State Corner claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tri-State Corner before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tri-State Corner ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tri-State Corner

In research: Tri-State Corner appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tri-State Corner in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tri-State Corner is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1810s establishments in Tennessee, 1818 establishments in Alabama Territory, 1818 establishments in Georgia (U.S. state), so understanding it makes those chapters shorter.
In everyday life: Look for Tri-State Corner outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tri-State Corner in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tri-State Corner means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tri-State Corner out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tri-State Corner in simple terms?

Why does Tri-State Corner matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tri-State Corner?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tri-State Corner.