engineering

Lake Van Arsdale

Lake Van Arsdale 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 Lake Van Arsdale rather than just read about it. In short: Lake Van Arsdale, also known as Van Arsdale Reservoir, is a reservoir on the Eel River in California, part of the Potter Valley Project. Located in Mendocino County, 4 miles (6.4 km) north of the town of Potter Valley, California, the reservoir supplies water to users as far south as Marin County.

Key takeaways

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

Reference excerpt

Lake Van Arsdale, also known as Van Arsdale Reservoir, is a reservoir on the Eel River in California, part of the Potter Valley Project. Located in Mendocino County, 4 miles (6.4 km) north of the town of Potter Valley, California, the reservoir supplies water to users as far south as Marin County. The reservoir is formed by the Cape Horn Dam, also known as Van Arsdale Dam, which impounds the waters of the Eel River. A portion of its water (154,000 acre-feet (190,000,000 m3) per year, on average) is diverted southward through an aqueduct tunnel to a powerhouse in Potter Valley, where it drives a turbine capable of generating up to 9.4 MW of electric power. Diverted water then descends by means of the Powerhouse Canal and East Fork Russian River to Lake Mendocino, which supplies the Sonoma County Water Agency. The non-diverted flow continues down the Eel to its mouth at the Pacific Ocean near Fortuna.

History In 1905, the Snow Mountain Water and Power Company started building the Potter Valley Project. Cape Horn Dam was completed in 1907 (1907), and the original project became operational in 1908. Pacific Gas and Electric Company took over the project in 1930 and owns most of the lake bed.

Cape Horn Dam Cape Horn Dam is an earth fill and concrete gravity dam 63 feet (19 m) high, 515 feet (157 m) long, and 10 feet (3.0 m) thick, containing 40,000 cubic yards (31,000 m3) of material. Its crest is 1,519 feet (463 m) above sea level.

See also Lake Pillsbury List of reservoirs and dams in California List of lakes in California

References

External links

SCWA reservoir levels, including Lake Van Arsdale Archived 2015-04-01 at the Wayback Machine Historic American Engineering Record (HAER) No. CA-53, "Van Arsdale Dam, South Fork of Eel River, Ukiah, Mendocino County, CA", 12 photos, 5 data pages, 1 photo caption page

Illustrations

Worked examples

Example 1 — a first encounter with Lake Van Arsdale

Start with the simplest possible case. Write down what Lake Van Arsdale 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 Lake Van Arsdale 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 Lake Van Arsdale 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 Lake Van Arsdale

In research: Lake Van Arsdale 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 Lake Van Arsdale 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: Lake Van Arsdale is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures completed in 1907, Dams in California, Eel River (California), so understanding it makes those chapters shorter.
In everyday life: Look for Lake Van Arsdale 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 Lake Van Arsdale in 20 minutes

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

Frequently asked questions

What is Lake Van Arsdale in simple terms?

Why does Lake Van Arsdale 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 Lake Van Arsdale?

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 Lake Van Arsdale.