science

Rock Island Clean Line

Rock Island Clean Line is a science 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 Rock Island Clean Line rather than just read about it. In short: The Rock Island Clean Line was a proposed 500-mile high voltage direct current (HVDC) transmission line. The stated purpose of the line was to transport electrical power from wind energy dense states in the Midwestern United States (Iowa, Nebraska, South Dakota and Minnesota) to the energy markets in the Chicago, Illinois, and cities further east.

Key takeaways

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

Reference excerpt

The Rock Island Clean Line was a proposed 500-mile high voltage direct current (HVDC) transmission line. The stated purpose of the line was to transport electrical power from wind energy dense states in the Midwestern United States (Iowa, Nebraska, South Dakota and Minnesota) to the energy markets in the Chicago, Illinois, and cities further east. The planned line would run from the Sanborn, Iowa area to near Morris, Illinois. The developer, Clean Line Energy Partners, originally targeted an operational date of 2017. The region where the line would start has large potential for wind generation, but currently already can produce all the electricity it can use or transport out of the region on existing transmission lines. The line would have the capacity to transport up to 3500 megawatts of power out of the region. An economic study for the line estimates that it could transmit the power of eight 500 MW wind farms in the Siouxland area. The Federal Electricity Regulatory Commission approved the line in May 2012. In November 2014, the Illinois Commerce Commission approved it. As of January 2016, the Iowa Utilities Board has not yet approved it. Opposition to the Rock Island Clean Line was organized by Block RICL, which claims that the line will carry mostly non-wind energy (i.e., coal) and will use an unreasonably large amount of land. As of 2022, the status of the project is that it is completely dead. Clean Line withdrew its application to the Iowa Utilities Board in 2017, and Clean Line lost a decision of the Illinowas Supreme Court which held that Clean Line did not meet the ownership requirements to be a public utility in Illinois. Thus, the entire project has been killed by the two states. Clean Line is out of business and has let go all of its employees.

See also Wind power in Illinois Wind power in Iowa

References

External links Rock Island Clean Line Website

Worked examples

Example 1 — a first encounter with Rock Island Clean Line

Start with the simplest possible case. Write down what Rock Island Clean Line claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Rock Island Clean Line 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 Rock Island Clean Line 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 Rock Island Clean Line

In research: Rock Island Clean Line appears in science 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 Rock Island Clean Line 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: Rock Island Clean Line is common in secondary-school and first-year university syllabi. It links to neighbouring topics Electric power stubs, High-voltage direct current, Transmission lines, so understanding it makes those chapters shorter.
In everyday life: Look for Rock Island Clean Line 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 Rock Island Clean Line in 20 minutes

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

Frequently asked questions

What is Rock Island Clean Line in simple terms?

Why does Rock Island Clean Line matter?

Because it connects several science 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 Rock Island Clean Line?

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 Rock Island Clean Line.