D2.Geo.5.9-12: How Decisions Over Time Reshaped the Upper Columbia
In plain English: D2.Geo.5.9-12 is the C3 Framework geography indicator for grades 9-12 that asks students to evaluate how political and economic decisions, made and revised over time, have changed the cultural and environmental characteristics of places and regions. It is usually taught in high school human geography, world geography or U.S. history.
Evaluate how political and economic decisions throughout time have influenced cultural and environmental characteristics of various places and regions.
C3 Framework for Social Studies (NCSS) · Dimension 2: Applying Disciplinary Concepts and Tools · Discipline: Geography · Human-Environment Interaction: Place, Regions, and Culture · Official standard
D2.Geo.5.9-12 asks students to evaluate how political and economic decisions throughout time have influenced the cultural and environmental characteristics of places and regions. Evaluating goes beyond describing: students judge the effects of decisions against clear criteria, compare the perspectives of different sources, and notice how later decisions respond to earlier ones.
The case is Grand Coulee Dam on the upper Columbia River in Washington State. Federal decisions made in the 1930s and 1940s built the dam and an irrigation project; later decisions created a national recreation area, expanded power production and, in 1994, settled a claim by the Confederated Tribes of the Colville Reservation. Students use a Bureau of Reclamation page, a National Park Service page, the text of a 1994 federal law and Census population data to weigh benefits and costs for the region's environment and its cultures. The page does not ask students to reach any particular verdict; the rubric scores the quality of the reasoning and evidence.
Learning Objectives
By the end of this lesson, students will be able to:
Distinguish political decisions from economic decisions and explain how they work together in a large public project.
Trace how a sequence of decisions over about 60 years changed the environmental characteristics of a region (a river, its fish and its land use).
Trace how the same decisions changed cultural characteristics (towns, fisheries, settlement patterns and the relationship between a tribal nation and the federal government).
Evaluate the decisions with stated criteria, using evidence from sources with different perspectives and acknowledging a counterclaim.
Prior Knowledge Required
Students should already be comfortable with:
Explaining how places are similar and different by their cultural and environmental characteristics D2.Geo.5.6-8
Comparing the points of view of two or more authors on the same topic RH.9-10.6
Calculating percent change and reading a line graph
"A government plans a huge project that will bring jobs, electricity and farm water to a region, but it will flood a river valley where people live and fish. Before anyone can say whether the project was a good decision, what questions would you need answered?"
Collect questions on the board and group them into four evaluation criteria: scale (how big and how widespread are the effects?), distribution (who gains and who bears the costs?), duration (do the effects last for years or for generations?) and response (did later decisions reduce the costs or share the benefits?). Tell students they will use these criteria at the end of the lesson.
Direct Instruction20 minutes
Part 1: Key terms. A political decision is made through government: a law, a funding choice, a court settlement, a treaty or a land designation. An economic decision is a choice about producing and using resources: where to invest, what to grow, how to sell electricity. Large public projects usually mix the two, because a government decides to spend money in order to produce economic results. Throughout time means decisions come in sequences: each one changes the place, and later decision makers respond to the new place. Anadromous fish, such as salmon and steelhead, hatch in rivers, grow up in the ocean and return upriver to spawn, so a dam with no way past it cuts them off from the river above.
Part 2: The place. Show the upper Columbia on a wall map: the river flows south from Canada into Washington, past Kettle Falls, to the dam site, then on to the Pacific. Read Table 1 together, asking students to label each row political, economic or both. Then read Table 2 and Diagram 2.
Table 1. Decisions and events on the upper Columbia River (sources: National Park Service, Lake Roosevelt National Recreation Area pages; Bureau of Reclamation, Grand Coulee Dam pages; Public Law 103-436)
Year
Decision or event
Source
1811
Fur trader David Thompson reaches Kettle Falls. Representatives of several Native American tribes from up to 200 miles away gathered there to harvest salmon and steelhead; Kettle Falls was the second largest fishery on the Columbia River.
NPS, Fort Colvile page
1933-1941
Grand Coulee Dam and its Left Powerhouse are built, authorized under the National Industrial Recovery Act and later by the Rivers and Harbors Act.
Reclamation, About page
1941
The dam is completed; the old Fort Colvile site near Kettle Falls is flooded by the new reservoir.
NPS, Fort Colvile page
1943
Congress passes the Columbia Basin Project Act, authorizing the canals and laterals that carry irrigation water to the Columbia Basin.
Reclamation, About page
1948
Congress designates Lake Roosevelt National Recreation Area, operated by the National Park Service.
Reclamation, History page
1980
The final generator comes online at the Nathaniel Washington Power Plant; Grand Coulee becomes the largest hydropower complex in the United States.
Reclamation, About page
1994
Congress approves a settlement with the Confederated Tribes of the Colville Reservation (see Source 3).
Public Law 103-436
Table 2. Population of Grant County (the main Columbia Basin Project county) and of Washington State (real data: U.S. Census Bureau, 1990 Census report CPH-2-49, Table 3, for 1940-1990; 2010 Census; Vintage 2024 estimate for July 1, 2024)
Year
Grant County
Washington State
1940
14,668
1,736,191
1950
24,346
2,378,963
1960
46,477
2,853,214
1970
41,881
3,413,244
1980
48,522
4,132,353
1990
54,758
4,866,692
2010
89,120
6,724,540
2024 (estimate)
104,717
7,958,180
Classifying a decision
In 1943 Congress passed the Columbia Basin Project Act, which authorized canals to carry water from the reservoir to dry farmland. Is this a political or an economic decision?
Result: It is a political decision (a law passed by Congress) with economic goals (irrigated farming). Naming both parts shows how the two kinds of decision work together.
Reading population change
Use Table 2. How did Grant County's growth from 1940 to 1960 compare with the state's?
Result: Grant County: 46,477 ÷ 14,668 ≈ 3.17, more than three times as many people. State: 2,853,214 ÷ 1,736,191 ≈ 1.64. Grant County grew much faster, which fits a new irrigation economy, but the table alone cannot prove the cause.
Measuring an environmental change
Reclamation's History page says Lake Roosevelt has a surface area of 82,000 acres and stretches 151 miles to the Canadian border. How many square miles of river valley does the reservoir cover? (1 square mile = 640 acres.)
Result: 82,000 ÷ 640 ≈ 128 square miles of former river, shoreline and valley now under water, along a 151-mile stretch of the Columbia.
Separating evidence from perspective
Source 1 is written by the Bureau of Reclamation, the federal agency that runs the dam. How should that shape the way students use it?
Result: Source 1 is strong evidence for what the agency built and the benefits it reports, such as power, irrigation and flood control. It is weaker evidence for the costs, so students should corroborate it with sources written from other perspectives before they evaluate.
Guided Practice20 minutes
Read Sources 1 and 2 side by side. Source 1 comes from the Bureau of Reclamation's page about Grand Coulee Dam. Source 2 comes from the National Park Service page about the remains of the old town of Kettle Falls. Words to know: mitigate means to make a harm less severe; laterals are smaller canals that branch off a main canal; inundation means flooding; condemned property is taken by the government for public use, with payment to the owner. Paragraph numbers count only the paragraphs shown.
1In addition, Grand Coulee Dam funds a complex of three hatcheries—Leavenworth, Winthrop and Entiat—collectively known as the Leavenworth Complex, to mitigate for the loss of anadromous fish above the dam. Over 2 million spring chinook and summer steelhead are raised annually.
2Authorized under the National Industrial Recovery Act and later by the Rivers and Harbors Act, Grand Coulee Dam and the Left Powerhouse were constructed between 1933 and 1941. The Columbia Basin Project Act of 1943, based on extensive studies known as the Columbia Basin Joint Investigations, authorized construction of the Columbia Basin Project, which consists of 330 miles of major distribution canals, lakes and reservoirs, and about 2,000 miles of laterals that currently irrigate approximately 680,000 acres of land.
3The economic values of the Columbia Basin Project include irrigated crops valued at $1.2 billion annually, hydropower production of approximately $500 million annually, and the prevention of more than $206 million in flood damages since 1950. The Columbia Basin Project also resulted in the creation of vast wetlands and riparian areas and provides recreation benefits to about four million visitors each year.
4This project made the development of the Pacific Northwest possible and its importance to the nation has been profound. Its influence spread outward to benefit all citizens. Construction of Grand Coulee Dam put thousands to work during the Depression. Grand Coulee's generators played a vital role in supplying power to build planes, ships, tanks and develop atomic energy during World War II. Following the war, the Columbia Basin Project provided opportunities for returning veterans to farm their own tracts of land. With the completion of the final generating unit in the Nathaniel "Nat" Washington Power Plant, Grand Coulees' status as the largest hydropower generating facility in the United States was assured, and tangible benefits to Canadian residents were realized.
Bureau of Reclamation, U.S. Department of the Interior, About Grand Coulee Dam, four paragraphs (Source 1) (2024). US government work (17 U.S.C. 105). Source text.
1The Grand Coulee Dam was built on the Columbia River during the 1930s Depression as a part of President Roosevelt’s Works Projects Administration, a plan to irrigate the parched farmland of the Columbia Basin, bring electricity to rural areas and get the unemployed back to work, also brought the demise of 11 towns along the river. Faced with inundation by Lake Roosevelt, the reservoir created by the dam, some three thousand people had to leave their homes. Land, home and business owners had few options. They had to sell their property or see it condemned. Their buildings could be sold as well. Owners could pay for them to be moved or watch them burn.
2A few communities, like Marcus and Kettle Falls, persevered by relocating, but many smaller towns simply broke apart and scattered to the wind. The actual sites of most of the towns have disappeared under the reservoir, but the remnants of these two towns can still be seen. Marcus is visible during the lake’s drawdown and curious visitors can still stumble across the remains of old Kettle Falls year round in Locust Grove. They can imagine what brought people to the town as they look at the stairs that once served the stage-coach riders. Careful observers can find the family name Bevan etched into a sidewalk outside the old bakery. The remains of old Kettle Falls are slowly being reclaimed by the landscape but if we continue to talk about the town and remember its stories the town will never truly be gone.
National Park Service, Lake Roosevelt National Recreation Area, Old Kettle Falls, two paragraphs (Source 2) (2015). US government work (17 U.S.C. 105). Source text.
Sort the decisions. Prompt: list every decision each source names and label it political, economic or both. Ask which source names more decisions, and why that might be.
Sort the effects. Prompt: build a two-column chart, environmental effects and cultural effects, with the source and paragraph for each entry. Push students to find at least one environmental effect in each source.
Compare perspectives. Prompt: what does each source emphasize, and what does it leave out? Students should name the author of each source and connect its emphasis to that author's role.
Draft a criterion statement as a class. Choose one criterion from the Warm-Up and write a sentence that applies it to the two sources, for example on distribution: "The benefits Source 1 describes reached ___, while the costs Source 2 describes fell on ___."
Independent Practice15-25 minutes
Read Source 3, a later political decision. Source 3 is part of a federal law passed in 1994, more than 50 years after the dam was finished. A finding is a statement of facts that Congress says it relies on; a settlement ends a legal claim with terms both sides accept; litigation means a lawsuit. The law's own labels, such as finding (2) and section 4(c), are used to cite it.
(a) FINDINGS.—The Congress finds that—
(1) there is pending before the United States Court of Federal Claims, a suit by the Confederated Tribes of the Colville Reservation against the United States, in which the Tribe seeks to recover damages under the "Fair and Honorable Dealings" clause of the Indian Claims Commission Act (Act of August 13, 1946, 60 Stat. 1049), and in which, although the matter is in dispute, the potential liability of the United States is substantial;
(2) the claim alleges that the United States has since the construction of Grand Coulee Dam used Colville Reservation land in the generation of electric power, and will continue to use such reservation land for as long as Grand Coulee Dam produces power; and that the United States has promised and undertaken to pay the Tribe for such use and has not done so;
(3) the United States, after years of litigation, has negotiated a Settlement Agreement with the Tribe, signed by the Department of Justice, the Bonneville Power Administration and the Department of the Interior. The Settlement Agreement is contingent on the enactment of the enabling legislation; and
(4) the Settlement Agreement, approved in this Act, will provide mutually agreeable compensation for the past use of reservation land in connection with the generation of electric power at Grand Coulee Dam, and will establish a method to ensure that the Tribe will be compensated for the future use of reservation land in the generation of electric power at Grand Coulee Dam, and will settle the claims of the Tribe against the United States brought under the Indian Claims Commission Act.
[...]
(c) SETTLEMENT.—Consistent with the negotiated terms of the Settlement Agreement, the United States shall join in the motion that the Tribe has agreed to file in Confederated Tribes v. United States, Indian Claims Commission Docket 181-D, for the entry of a compromise final judgment in the amount of $53,000,000. The judgment shall be paid from funds appropriated pursuant to section 1304 of title 31, United States Code, and is not reimbursable by the Bonneville Power Administration.
Congress of the United States, Public Law 103-436, Confederated Tribes of the Colville Reservation Grand Coulee Dam Settlement Act, findings and settlement (Source 3) (1994). US government work (17 U.S.C. 105). Source text.
Write an evaluation. Each student answers this question in 250-350 words: "How well did later decisions (the 1948 recreation area, the hatcheries Source 1 describes and the 1994 settlement) respond to the costs of the original decision to build Grand Coulee Dam?" Students may argue that the responses were strong, partial or weak. The answer must apply at least two of the four criteria, cite all three sources, use one number from Tables 1-2 or the sources, and respond to one counterclaim.
Closure10 minutes
Exit ticket. "Name one cultural characteristic and one environmental characteristic of the upper Columbia that are different today because of decisions made in the 1930s. For each, name the decision."
Teacher note on the sources. Source 2 links the dam to the "Works Projects Administration," while Source 1 says the dam was authorized under the National Industrial Recovery Act, and the People page for Lake Roosevelt (NPS) says the dam was built by the Public Works Administration (PWA). Source 1 and the People page fit together: the PWA was created under the National Industrial Recovery Act of 1933. Source 2's name matches no New Deal agency; it blends the PWA with the Works Progress Administration (WPA), a separate work-relief agency created in 1935 and renamed the Work Projects Administration in 1939. Use the mismatch to show corroboration: when sources differ on a detail, historians check which account other sources support. Also ask students what kind of evidence Source 3 is, and what it can and cannot prove.
Teacher note on balance and respect. Students and their families may hold different views about large dams and water projects, and the sources show both benefits and losses. Keep the class focused on evidence and criteria, and accept well-supported evaluations that reach different verdicts. Refer to the Confederated Tribes of the Colville Reservation by the name used in the law, and treat tribal nations as present-day governments, not only as part of the past. Source 3 records only the claim the law settled, the use of reservation land to generate power; it is not a full account of what the dam meant to tribal nations. The Lake Roosevelt History & Culture page (NPS) says the dam transformed the river into Lake Roosevelt, "forever changing salmon runs upstream," and Source 1 names the "loss of anadromous fish above the dam," the fish that tribes gathered to harvest at Kettle Falls (Table 1). Present these losses as documented facts, and keep evaluation questions about the decisions, not about whether the losses happened.
Differentiation Strategies
For Struggling Students
Give the decision and effect chart for Guided Practice with the row labels and two entries filled in.
Provide the frame: "The decision to ___ (political/economic) changed the ___ (environmental/cultural) characteristic of ___. This was a benefit for ___ and a cost for ___."
Let students write the evaluation with two criteria and two sources, then add the third source in a revision.
For Advanced Students
Compare Grand Coulee with another federal water project the student researches, judging both with the same four criteria.
Find the 1970 dip in Table 2 and list what kinds of further evidence would be needed to explain it, without guessing a cause.
Write a short counterclaim from the perspective of a Columbia Basin farm family and a rebuttal from the perspective of a family that left a flooded town, using only facts from the sources.
Assessment Guidance
What to Look For
Strong evaluations name specific decisions with dates, sort their effects into environmental and cultural characteristics, apply stated criteria, and weigh sources with different perspectives. They acknowledge a counterclaim and avoid treating one source as the whole story. Watch for answers that only describe what happened, that treat a single number as proof of a cause, or that judge the decision without evidence.
02
Classroom Activities
3 Activities
1
Decision Chain Card Sort
20 minGroups of 3-4
Groups put eight decision cards in time order, label each one political, economic or both, and draw arrows from an effect of one decision to a later decision that responded to it. All facts on the cards come from Sources 1-3 and Table 1.
The 8 Decision Cards
A dam at Grand Coulee is authorized under the National Industrial Recovery Act, and construction begins (1933).
The Left Powerhouse is built so the dam can generate and sell electricity (1933-1941).
Property owners in the towns about to be flooded give up their land to the reservoir project (1930s).
Congress passes the Columbia Basin Project Act to build canals for irrigation (1943).
Grand Coulee Dam funds three fish hatcheries (date not given in Source 1).
Congress designates Lake Roosevelt National Recreation Area (1948).
The final generator comes online at the Nathaniel Washington Power Plant (1980).
Congress approves a settlement with the Confederated Tribes of the Colville Reservation (1994).
Answer Key
Order: 1, 2 and 3 (all during construction), 4, 6, 7, 8; card 5 has no date in the source; students should place it after construction and explain why, using paragraph 1 of Source 1. Political: 1, 4, 6, 8. Economic: 2, 7. Both: 3 (a government taking of property, with payment) and 5 (a government-funded program that also protects a fishery). Response arrows: an environmental effect named in Source 1, paragraph 1, leads to card 5; the new reservoir leads to card 6; the claim described in Source 3 leads to card 8.
Discussion
Ask: which decisions were made to fix a cost created by an earlier decision? How many years passed between the original decision and each response? Does a long gap change how you evaluate the response?
2
Perspectives Roundtable
20 minGroups of 4
Each student in a group takes one perspective and evaluates the decisions from that point of view, using only facts from the sources. The goal is to see that the same decision can be a benefit for one group and a cost for another.
Perspective Cards
Columbia Basin farmer after the war: Source 1 says the project gave returning veterans the chance to farm their own land and now irrigates about 680,000 acres.
Resident of a town along the river in the 1930s: Source 2 describes what happened to the towns along the river and the people who lived in them.
Member of a tribe that fished at Kettle Falls: Table 1 says tribes from up to 200 miles away harvested salmon and steelhead there; Source 1, paragraph 1, describes what happened to these fish after the dam was built.
Wartime factory planner: Source 1 says the dam's generators helped supply power to build planes, ships and tanks during World War II.
Roundtable Steps
1. Each student reads a card aloud and names the decision that mattered most to that perspective. 2. Each student rates that decision for their perspective on the four criteria (scale, distribution, duration, response) as high, medium or low. 3. The group compares ratings and writes one sentence on where the perspectives agree and one on where they differ.
Teacher Note
Students speak from the facts on the card, not from invented feelings or quotations. Remind them that each perspective card describes one group's experience and does not stand for every person in that group.
3
Growth by the Decade
15 minPairs
Pairs use Table 2 to calculate how fast Grant County and the state grew in each decade from 1940 to 1990, then decide what the numbers can and cannot show about the effects of the dam and the irrigation project.
Tasks
Calculate the percent change in population for each decade from 1940 to 1990, for Grant County and for the state.
Name the decade when Grant County grew fastest, and compare its rate with the state's in that decade.
Name the decade when Grant County's population fell.
Write one claim the data supports and one claim it cannot support on its own.
Answer Key
1. Grant County: 1940s +66.0%, 1950s +90.9%, 1960s -9.9%, 1970s +15.9%, 1980s +12.9%. State: +37.0%, +19.9%, +19.6%, +21.1%, +17.8%. 2. The 1950s: Grant County grew 90.9%, more than four times the state's 19.9%. 3. The 1960s. 4. Supported: Grant County grew much faster than the state in the two decades after the dam was finished. Not supported alone: that irrigation caused all of the growth, since the table does not show why people moved.
Variation: Spreadsheet Graph
Pairs enter Table 2 in a spreadsheet and graph both series as an index with 1940 = 100, then compare their graph with Diagram 2.
03
Diagrams & Visual Aids
2 diagrams
Diagram 1: A Timeline of Decisions on the Upper Columbia
Built from Table 1 and Sources 1-3. Positions are to scale by year from 1925 to 2000. The 1811 fishery description in Table 1 is earlier than the range shown.
Diagram 2: Grant County and Washington State Population, Indexed to 1940
Real data from Table 2 (U.S. Census Bureau). Each value is divided by the 1940 population and multiplied by 100, so both lines start at 100 and can be compared even though the state is far larger. The gap between 1990 and 2010 is 20 years, wider than the earlier 10-year steps.
04
Homework Assignment
~30 min
D2.Geo.5.9-12 Homework: Decisions in the Lunden Valley
Directions: The Lunden Valley, the Harrowgate River and the village of Vellmar are invented for this homework, and every number is invented. Read the timeline, then answer the problems. Show your calculations and cite the timeline year for every fact you use.
1952: The national government passes the Lunden Canal Act, paying for a dam and canals to irrigate 40,000 hectares of dry land. 1955: Farm companies choose to plant cotton on most of the newly irrigated land, because cotton sells for a high price. 1960: The Harrowgate Marsh, a wetland of 12,000 hectares, is drained for more fields. Counts of wintering birds at the marsh fall from 85,000 (1950) to 9,000 (1965). 1962: The 900 residents of Vellmar village are moved to a new town on the canal so the reservoir can fill; the government pays for their land. 1978: Cotton prices fall, and many farms switch to fruit orchards, which need less water. 1995: The government buys back 3,000 hectares of former marsh and lets it flood again. By 2010 the bird count is 31,000. Valley population: 6,200 (1950), 18,500 (1970), 22,100 (2000).
Part 1: Decisions and Numbers (Problems 1-3)
Label each of the six dated events as a political decision, an economic decision or both, and give a one-sentence reason for each label.
What percent of the drained marsh was restored in 1995? By what percent did the wintering bird count fall from 1950 to 1965, and what percent of the 1950 count had returned by 2010?
By what percent did the valley's population grow from 1950 to 1970, and from 1970 to 2000? What do the two rates suggest about when the canal decisions had their biggest effect on settlement?
Part 2: Evaluate (Problems 4-6)
Make a two-column chart of effects: environmental characteristics and cultural characteristics of the valley that changed. Put at least three effects in each column and name the decision behind each.
Evaluate the 1995 decision with two of the four criteria from the lesson (scale, distribution, duration, response). Use at least two numbers.
Write an evaluation of 150-200 words answering: "Did the decisions made in the Lunden Valley from 1952 to 1995 improve the valley overall?" State a claim, support it with evidence from the timeline, respond to a counterclaim, and compare one decision with a Grand Coulee decision from the lesson.
Rubric
Criterion
Full Credit (2 pts)
Partial Credit (1 pt)
No Credit (0 pts)
Classifies Decisions
All six events labeled with sound reasons, including events that are both
Most labels correct or reasons missing
Labels missing or mostly wrong
Uses Data Accurately
All percents correct and interpreted in context
One or two errors, or numbers given without interpretation
Calculations missing or mostly wrong
Traces Cultural and Environmental Effects
Three or more effects in each column, each tied to a decision
Effects listed but some not tied to a decision, or one column thin
Effects missing or not sorted
Evaluates with Criteria
Clear claim, stated criteria, evidence and a counterclaim, plus a supported comparison with Grand Coulee
Claim and evidence but no counterclaim or comparison
Opinion without evidence or criteria
05
Quiz: 20 Questions
Interactive, with answers
Instructions
Questions 3, 4, 14, 15 and 16 use Source 1, questions 6-8, 15, 16 and 20 use Source 2 (both in Guided Practice), and questions 5, 9, 10 and 17 use Source 3 in Independent Practice. Questions 11-13 and 18 use Table 2 and Diagram 2, and question 20 also uses Table 1 (Direct Instruction). Question 19 uses all three sources. Choose the best answer, then check it.
Multiple choice: pick an option to check it. Short answer: write your answer, then reveal the model answer.
0 of 20 answered · 0 correct
Question 1 of 20 · Multiple Choice
Which of these is a political decision?
Answer: C
A legislature's vote is a decision made through government, so it is political, even though its goal (a canal) is economic. Choices A, B and D are choices about producing, selling or earning, so they are economic; choice B is a common trap because power prices can be regulated, but the option describes a company's own choice.
Question 2 of 20 · Multiple Choice
Which economic decision would most directly change an environmental characteristic of a place?
Answer: A
Irrigating dry pasture changes how much water the land gets and what grows on it, which are environmental characteristics. Choices B, C and D are economic decisions too, but they do not directly change the land, water, plants or animals of a place; choice D is also a decision by a government body.
Question 3 of 20 · Multiple Choice
According to paragraph 1 of Source 1, why does Grand Coulee Dam fund three hatcheries?
Answer: D
Paragraph 1 says the hatcheries exist "to mitigate for the loss of anadromous fish above the dam." The source says nothing about restaurants (A) or sales to Canada (B); Canada appears in a different part of the Reclamation page, about power. Choice C mixes in Source 3, which says nothing about hatcheries.
Question 4 of 20 · Multiple Choice
Source 1 says the project irrigates "approximately 680,000 acres," but Reclamation's History page for the dam says "approximately 600,000 acres." What is the best way for a student to use these figures?
Answer: B
When two sources from the same agency disagree, a careful writer reports both, says where each comes from, and notes the difference. Choice A assumes a date the pages do not give for the figures, and choice C invents a number neither source states. Choice D throws away useful evidence; both figures show an irrigated area of several hundred thousand acres.
Question 5 of 20 · Multiple Choice
Source 3 is a federal law. Which statement best describes the kind of evidence it gives?
Answer: A
Finding (1) says the claim is "in dispute," and finding (3) says the two sides "negotiated a Settlement Agreement," which the act approves. So the law records the claim and the settlement; it is not a court verdict (B), a tribal account (C) or an agency cost report (D). Choice B is a common misreading of a settlement.
Question 6 of 20 · Multiple Choice
According to paragraph 1 of Source 2, about how many people had to leave their homes because of the reservoir?
Answer: C
Source 2 says "some three thousand people had to leave their homes." Choice B may come from the number of towns (11), and choice D from multiplying that number by 1,000.
Question 7 of 20 · Multiple Choice
According to Source 2, what choice did land, home and business owners face?
Answer: B
Paragraph 1 says owners "had to sell their property or see it condemned." Choice C describes the later farm opportunities that Source 1 mentions for veterans, not the choices of owners in the flooded towns.
Question 8 of 20 · Multiple Choice
Which detail in paragraph 2 of Source 2 shows a community changing its location but not disappearing?
Answer: D
Paragraph 2 says a few communities "like Marcus and Kettle Falls, persevered by relocating." Choices A and B describe towns that did not survive, and choice C describes physical remains, not a living community.
Question 9 of 20 · Multiple Choice
According to finding (2) of Source 3, what did the Tribe's claim allege?
Answer: A
Finding (2) says the claim alleges the United States "used Colville Reservation land in the generation of electric power" and "promised and undertaken to pay the Tribe for such use and has not done so." Choices B, C and D may be questions a student would want to research, but Source 3 does not state them.
Question 10 of 20 · Multiple Choice
According to section 4(c) of Source 3, what was the amount of the compromise final judgment?
Answer: C
Section 4(c) names "a compromise final judgment in the amount of $53,000,000." Choices A, B and D shift the decimal point by one or more places. The law also directs the Bonneville Power Administration to make annual payments, so the judgment is not the whole settlement.
Question 11 of 20 · Multiple Choice
Use Table 2. By about what percent did Grant County's population grow from 1990 to 2024?
Answer: B
(104,717 - 54,758) ÷ 54,758 = 49,959 ÷ 54,758 ≈ 0.912, an increase of about 91.2%. Choice A divides the change by the 2024 population instead of the 1990 population. Choice C writes the ratio 104,717 ÷ 54,758 ≈ 1.912 as a percent, and choice D treats the change in people as a percent.
Question 12 of 20 · Multiple Choice
Use Table 2. In which year shown was Grant County's share of the state's population the highest?
Answer: B
Shares: 1940, 14,668 ÷ 1,736,191 ≈ 0.84%; 1960, 46,477 ÷ 2,853,214 ≈ 1.63%; 2010, 89,120 ÷ 6,724,540 ≈ 1.33%; 2024, 104,717 ÷ 7,958,180 ≈ 1.32%. Choice D has the largest number of people, but the state grew too, so the county's share was lower than in 1960.
Question 13 of 20 · Multiple Choice
On Diagram 2, Grant County's index for 2024 is about 714. What does that mean?
Answer: D
An index of 714 with 1940 = 100 means 714 ÷ 100 ≈ 7.1 times the 1940 population (104,717 ÷ 14,668 ≈ 7.14). Choice B reads the index as the percent growth, but the first 100 of the index is the starting population itself, so percent growth is the index minus 100. Choices A and C misread the index as a count.
Question 14 of 20 · Multiple Choice
Which question best applies the response criterion to the 1994 settlement in Source 3?
Answer: C
The response criterion asks whether a later decision reduced the costs of an earlier one, so it asks whether the settlement addresses a cost of the original decision and for which people. Choice A applies scale, choice B distribution and choice D duration.
Question 15 of 20 · Short Answer
Using Sources 1 and 2, name one political decision and one economic decision connected to Grand Coulee Dam. For each, name a cultural or environmental characteristic it changed, and cite the source and paragraph.
Model answer: Political: authorizing the dam under the National Industrial Recovery Act (Source 1, paragraph 2) led to the reservoir, which ended 11 towns along the river, a cultural change (Source 2, paragraph 1). Economic: using the reservoir's water to irrigate dry farmland (Source 1, paragraphs 2-3) changed the land of the Columbia Basin from dry to irrigated cropland and created "vast wetlands and riparian areas," an environmental change (Source 1, paragraph 3). Rubric: 2 points for one correct decision of each type with a characteristic and a citation; 1 point if one part is missing.
Question 16 of 20 · Short Answer
Source 1, paragraph 3, says the project "resulted in the creation of vast wetlands and riparian areas." Explain how a single decision can make an environmental characteristic better in one place and worse in another, using Sources 1 and 2.
Model answer: Water stored behind the dam was moved to the dry Columbia Basin, creating new wetlands and streamside habitat there (Source 1, paragraph 3). The same dam turned a long stretch of free-flowing river into a reservoir, changing the habitat of river fish, and it flooded the valley where towns stood (Source 2). So the decision added habitat in one place and removed it in another; an evaluation has to say which places, and for whom. Rubric: 2 points for a gain and a loss in different places, each cited; 1 point for one side only.
Question 17 of 20 · Short Answer
Source 3 was passed in 1994, more than 50 years after the dam was completed in 1941. Explain how Source 3 shows what D2.Geo.5.9-12 means by decisions "throughout time."
Model answer: 1994 - 1941 = 53 years. The first decisions built the dam; much later, Congress made a new political decision in response to the Tribe's claim described in finding (2). The settlement adds annual payments "for the future use of reservation land" (finding (4)), so the 1994 decision changes the relationship between the Tribe and the federal government going forward. Decisions throughout time build on and respond to earlier ones. Rubric: 2 points for the time gap and a clear explanation of a later decision responding to an earlier one; 1 point for one of the two.
Question 18 of 20 · Short Answer
Use Table 2. Calculate the percent growth from 1940 to 2024 for Grant County and for Washington State. What can these numbers tell you about the effects of the Columbia Basin decisions, and what can they not tell you?
Model answer: Grant County: (104,717 - 14,668) ÷ 14,668 ≈ 613.9%. State: (7,958,180 - 1,736,191) ÷ 1,736,191 ≈ 358.4%. The county grew much faster than the state, which fits the arrival of irrigation and new farm settlement. The numbers cannot show the cause on their own: they do not say why people moved, and other events over 84 years also shaped growth. Rubric: 2 points for both percents and a claim with a stated limitation; 1 point for correct numbers without the limitation, or the reverse.
Question 19 of 20 · Short Answer
Apply the distribution criterion. Using all three sources, explain who gained from the Grand Coulee decisions and who bore costs.
Model answer: Source 1 lists gains for farmers (irrigated crops valued at $1.2 billion a year), the region's power users, wartime industry and returning veterans who could farm. Source 2 shows costs falling on the families whose towns were flooded. Source 3 shows that the Confederated Tribes of the Colville Reservation brought a claim against the United States over the dam, settled only in 1994. The benefits were spread across the region and the nation, while many costs fell on specific river communities. A strong answer may reach different conclusions but must cite each source. Rubric: 2 points for gainers and cost-bearers from all three sources; 1 point for two sources.
Question 20 of 20 · Short Answer
A classmate says: "The dam decisions changed the river's environment, but they did not really change anyone's culture." Write a rebuttal with two pieces of evidence.
Model answer: The decisions also changed cultural characteristics. Source 2 says the reservoir brought the demise of 11 towns along the river, so where and how people lived changed. Table 1 shows that tribes from up to 200 miles away gathered at Kettle Falls to harvest salmon and steelhead, and Table 1 shows the reservoir flooding the area near Kettle Falls in 1941, changing a gathering place that had been part of tribal life. Rubric: 2 points for two accurate cultural changes with sources; 1 point for one.
0 of 20 answered · 0 correct
06
Frequently Asked Questions
10 Questions
What does D2.Geo.5.9-12 mean?
D2.Geo.5.9-12 asks high school students to judge how government and economic choices, made over many years, have changed places. The full text is "Evaluate how political and economic decisions throughout time have influenced cultural and environmental characteristics of various places and regions." Students must trace the decisions, sort their effects, and evaluate them with criteria and evidence.
How is D2.Geo.5.9-12 different from D2.Geo.5.6-8?
The middle school indicator asks students to analyze how places are similar and different; the high school indicator asks them to evaluate how decisions changed places. The verb moves from analyze to evaluate, and the focus moves from describing a place to judging the effects of decisions over time.
What counts as a political decision and what counts as an economic decision?
Political decisions are made through government: laws, funding votes, court settlements, treaties and land designations. Economic decisions are choices about producing, selling and using resources, made by governments, businesses or households. Large projects usually combine both, so students should name each part.
Why use Grand Coulee Dam for this indicator?
It offers a clear sequence of documented federal decisions over about 60 years, with effects on both the environment and the cultures of the upper Columbia. Federal sources from different agencies, and a 1994 law, give students more than one perspective to weigh. Many other regions would work just as well with the same method.
Does this lesson say whether the dam was a good or bad decision?
No. Students build their own evaluation from the evidence, and the rubric scores the reasoning, the use of criteria and the handling of a counterclaim. Well-supported answers can reach different verdicts.
What criteria should students use to evaluate a decision?
This lesson uses four: scale (how large and widespread the effects are), distribution (who gains and who bears the costs), duration (how long the effects last) and response (whether later decisions reduced the costs). Teachers can add others, such as legality at the time, as long as students state them first.
Why are all the sources from the federal government?
They are free to reprint, and they come from different parts of the government with different roles. The Bureau of Reclamation runs the dam, the National Park Service manages the recreation area and tells local history, and Congress passed the 1994 law. Students should still name whose voices are missing, such as publications by the Tribe or accounts by former residents, as a limitation of the source set.
Which high school course teaches D2.Geo.5.9-12?
It fits high school human geography, world geography and U.S. history courses, wherever students study how decisions shape places. The C3 Framework does not assign it to one course, so schools place it where it fits their sequence.
How should the Confederated Tribes of the Colville Reservation be discussed?
Use the name the 1994 law uses, describe the claim and settlement as the law states them, and treat the Tribe as a present-day government. Avoid speaking for the Tribe; if students want tribal perspectives in the Tribe's own words, they should look for sources published by the Tribe itself.
How can I assess D2.Geo.5.9-12?
Use a written evaluation of 250-350 words scored on decisions named, effects traced, criteria applied, evidence from several perspectives and a counterclaim. The quiz checks the source reading and data skills behind that writing, and the homework applies the method to a new invented case.
07
Related Standards
5 standards
These standards connect to D2.Geo.5.9-12: prerequisites to review first, parallel standards at the same level, and next steps that build on it.
Before this lesson
D2.Geo.5.6-8Prerequisite
Analyze cultural and environmental traits that make places similar and different
Evaluate how human settlement affects environmental and cultural traits of places
Lesson coming soon
After this lesson
D2.Geo.8.9-12Extends to
Evaluate how economic activities and political decisions shape urban and rural patterns
Lesson coming soon
Standard text: National Council for the Social Studies (NCSS), The College, Career, and Civic Life (C3) Framework for Social Studies State Standards: Guidance for Enhancing the Rigor of K-12 Civics, Economics, Geography, and History (Silver Spring, MD: NCSS, 2013). NCSS was not involved in the production of this lesson and does not endorse it.