engineering

Sebasticook Lake Fishweir Complex

Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex rather than just read about it. In short: The Sebasticook Lake Fishweir Complex is a series of prehistoric fishing weir structures submerged in the waters of Sebasticook Lake in Newport, Maine. With radiocarbon dates as far back as 3000 BCE, it is one of the oldest structures of its type in North America, and the only one in eastern North America that has been directly dated.

Key takeaways

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

Reference excerpt

The Sebasticook Lake Fishweir Complex is a series of prehistoric fishing weir structures submerged in the waters of Sebasticook Lake in Newport, Maine. With radiocarbon dates as far back as 3000 BCE, it is one of the oldest structures of its type in North America, and the only one in eastern North America that has been directly dated. Its existence provides evidence of large-scale organization among Native Americans of the period in northeastern North America necessary to create structures of its complexity. The complex was listed on the National Register of Historic Places in 1994.

Sebasticook Lake

Sebasticook Lake is entirely within the town of Newport on the East Branch Sebasticook River 8 miles (13 km) upstream of the East Branch confluence with the Sebasticook River. It is the largest lake in the Sebasticook River watershed tributary of the Kennebec River. Stetson Stream flows 4 miles (6.4 km) into the east end of the lake from Pleasant Lake in Stetson. The East Branch Sebasticook River flows 12 miles (19 km) into the north end of the lake from Lake Wassookeag in Dexter. Smaller tributaries to the north end of the lake include Ring Brook and Harrison White Brook. The Dexter and Newport Railroad ran along the western shore of the lake and followed the East Branch Sebasticook River upstream through the towns of Corinna and Dexter. Nutrient-rich runoff from these communities caused eutrophication of the lake, with increased accumulation of bottom sediments from the annual die-off of aquatic vegetation. Fish species formerly present in the lake have been replaced by largemouth bass and crappie stocked by the Maine Department of Inland Fisheries and Wildlife.

Description The weir complex is located near the outlet of one of Sebasticook Lake's tributaries. Sebasticook Lake is a large body of water whose mouth has been dammed for some time; in the 1980s work was done to lower the mouth, and normal lowerings of the lake's water level after this change exposed the weirs to view. The weirs consist of a series of structures extending along what researching archaeologists believe to be historic positions of the tributary's main channel. The structures consist of wooden stakes, sharpened at the lower end by a stone axe, that were embedded in silt and organic material. The tops of the stakes, normally exposed to water when the lake is at a high level, and now exposed to air at lower levels, have been lost to natural processes and breakage by passing watercraft. These structures are subject to rapid erosion when the lake is at low water levels. A second element of the weir structures are pedestals of organic material which are topped by stones. These structures were particularly sensitive to the raising and lowering of the lake's water level; several of them collapsed during the three-year period (1991–93) when the weir complex was examined. In addition to the features of the weirs themselves, stone and wooden artifacts were found in the area. One interesting item found was a fragment of a birch bark container, radiocarbon dated to c. 200 BCE. Stone tools and projectile points have also been found by divers in the lake just beyond the modern mouth of the tributary.

See also National Register of Historic Places listings in Penobscot County, Maine Boylston Street Fishweir

References

Worked examples

Example 1 — a first encounter with Sebasticook Lake Fishweir Complex

Start with the simplest possible case. Write down what Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex

In research: Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex 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: Sebasticook Lake Fishweir Complex is common in secondary-school and first-year university syllabi. It links to neighbouring topics Archaeological sites on the National Register of Historic Places in Maine, Buildings and structures in Penobscot County, Maine, Fishing weirs, so understanding it makes those chapters shorter.
In everyday life: Look for Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex in 20 minutes

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

Frequently asked questions

What is Sebasticook Lake Fishweir Complex in simple terms?

Why does Sebasticook Lake Fishweir Complex 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 Sebasticook Lake Fishweir Complex?

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 Sebasticook Lake Fishweir Complex.