engineering

Hirshey Mine

Hirshey Mine 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 Hirshey Mine rather than just read about it. In short: The Hirshey Mine was one of the major gold mines in the northern mountains of the Kenai Peninsula in south-central Alaska in the first half of the 20th century. The mine was, unlike many local claims, an underground operation.

Key takeaways

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

Reference excerpt

The Hirshey Mine was one of the major gold mines in the northern mountains of the Kenai Peninsula in south-central Alaska in the first half of the 20th century. The mine was, unlike many local claims, an underground operation. It is located in the mountains of what is now Chugach National Forest, on the east side of Palmer Creek about 12 miles (19 km) southeast of the community of Hope. The claim was staked in 1911 John Hirshey, who arrived in the area in 1895 and was one of the early settlers of Hope. He called the claim his "Lucky Strike", and it was worked until all mines were closed in the area in 1942. When the area was listed on the National Register of Historic Places in 1978, remnants of two buildings survived, along with the entrance to one of the tunnels and discarded equipment. The mine was listed on the National Register of Historic Places in 1978.

See also National Register of Historic Places listings in Kenai Peninsula Borough, Alaska

References

Worked examples

Example 1 — a first encounter with Hirshey Mine

Start with the simplest possible case. Write down what Hirshey Mine 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 Hirshey Mine 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 Hirshey Mine 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 Hirshey Mine

In research: Hirshey Mine 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 Hirshey Mine 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: Hirshey Mine is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1911 establishments in Alaska, 1942 disestablishments in Alaska, Alaska Registered Historic Place stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Hirshey Mine 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 Hirshey Mine in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hirshey Mine 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 Hirshey Mine out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hirshey Mine in simple terms?

Why does Hirshey Mine 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 Hirshey Mine?

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 Hirshey Mine.