Integrate and evaluate information presented visually, quantitatively and in words to address a question about the Mill Creek Bridge

Learning goal: Integrate and evaluate multiple sources of information presented in different media or formats (visually, quantitatively) as well as in words in order to address a question or solve a problem, citing strong and thorough evidence and determining where the sources leave matters uncertain.

The question. Should Fenwick County repair or replace the Mill Creek Bridge, and should it also fund the preventive painting of other bridges? No single source answers that question. The answer has to be built from several sources, each of which does something the others cannot.

Source packet — The Mill Creek decision (every source below is invented for this lesson; all figures are hypothetical and consistent with the essay and speech in the previous lessons)

Source 1 (quantitative table) — County inspection record, superstructure ratings. The county's hypothetical 0-to-9 scale: 9 excellent, 7 good, 5 fair, 4 poor, 3 serious, 0 failed. Ratings by inspection year: 1990: 7; 1998: 6; 2004: 6; 2008: 5; 2012: 4; 2016: 4; 2019: 3; 2024: 3. Note on the record: "Weight limit of 10 tons posted 2019. Open to vehicles under 10 tons."

Source 2 (visual) — Line graph of Source 1. The diagram in this lesson plots the same eight ratings against year.

Source 3 (words and numbers) — County budget memo, March 2026. "Option R (repair): $2.4 million; expected additional service life 25 years; bridge closed to all traffic for 8 months during work. Option N (new bridge): $6.1 million; design life 75 years; route closed to all traffic for 24 months. Both options assume the same annual upkeep. Buses currently detour; the detour adds 7 miles to each of 4 daily bus trips."

Source 4 (visual, described) — Inspection photograph 14, 2024. A close-up of one steel connection plate at the north joint. Flaking orange rust covers most of the plate; two bolt heads are visibly reduced. The photo's caption reads: "Section loss at north joint. See report for measurements."

Source 5 (video, described) — A three-minute local news segment, April 2026, titled "Crumbling Bridge Strands Students." Drone footage circles the bridge at sunset; the camera zooms to a rusted joint. A parent says her son spends "twenty-five extra minutes a day" on the bus. An anchor states: "The county says the bridge is safe for cars, for now." No inspection figures appear on screen.

Source 6 (words) — The essay "The Work Nobody Cuts a Ribbon For" and the speech "Paying for Nothing," from the previous lessons, which argue that the 1998 postponement let the damage to the steel begin and that preventive painting of other bridges should be funded. Key passages: from the essay, "The decision was reasonable; the paint was worn, but the steel beneath it was sound. Over the following years water reached bare steel at the joints" (paragraph 3) and "A postponed repainting is not a saving of $180,000 but a loan of uncertain size" (paragraph 6); from the speech, the request "to fund the painting of the bridges that are still sound, the Route 9 overpass and the two spans on Harper Road, at a cost of $310,000 this year."

Integrate means combine, not list. A weak response summarizes Source 1, then Source 2, then Source 3. Integration means using sources together, so that one source's information answers a question another source raises. Start with what one source can do alone. The memo (Source 3) gives total costs and service lives, and the arithmetic is the reader's. Repair: $2,400,000 ÷ 25 years = $96,000 per year of service. New bridge: $6,100,000 ÷ 75 years ≈ $81,333 per year. On that measure (initial cost per stated year of service, undiscounted: it ignores when payments fall, borrowing costs and future repairs), and on the memo's stated assumption that annual upkeep is the same for both, replacement is cheaper by about $14,700 per year of service, even though its total is more than twice as large. But the memo also gives a cost that is not in dollars: replacement closes the route for 24 months, repair for 8. The buses are already detouring (Source 3: 7 extra miles on each of 4 daily trips, or 28 extra miles per school day). Repair would end the bus detour 16 months sooner than replacement. All of that still comes from one source. Integration begins when the memo's trade-off is set against the others: the inspection record (Sources 1 and 2) shows a rating of 3, serious, since 2019, with a weight limit already posted, so the condition calls for prompt planning (though no source says how long the bridge can safely stay in restricted use), and the news segment (Source 5) puts one family's human measure, "twenty-five extra minutes a day," on the detour that replacement would extend by 16 months. Together the sources turn a single-number comparison into a trade-off no one source states: a lower initial cost per stated service-year against a longer disruption at a bridge already rated serious.

Evaluate each medium for what it can and cannot show. Every medium has strengths and limits, and evaluating sources means naming them.

Quantitative (Source 1): precise, comparable over time, and produced by inspectors using a stated scale. Its limit: a rating says how bad, not why. It cannot by itself show that the 1998 postponement caused the decline.

Visual graph (Source 2): makes a pattern visible at a glance. The line is flat from 1998 to 2004 and then falls, which fits the essay's statement that in 1998 "the steel beneath it was sound" and that damage came "over the following years." The earlier drop, from 7 in 1990 to 6 in 1998, came before the postponement, so the record does not show the whole decline starting in 1998. Its limit is the same as the table's, since it shows the same data: the timing is consistent with the essay's causal story, but consistency is not proof.

Visual photograph (Source 4): vivid, specific evidence of one kind of damage. Its limit: it is a close-up of one plate at one joint. It cannot show how widespread the damage is; its own caption points the reader to measurements the photo does not contain.

Video (Source 5): powerful and engaging, and it adds a human cost (a parent's account of "twenty-five extra minutes a day") that no table records. Its limits: the title word "Crumbling" connotes dramatic, advanced decay and can suggest danger of collapse, while the record says "Open to vehicles under 10 tons," and "Strands Students" overstates a detour that still carries students to school; the zoom on a rusted joint, like the photograph, may make one joint stand for the whole bridge; the parent's figure is one family's experience, unverified; and no inspection figures appear on screen.

Words (Source 6): the essay and speech explain a cause and make an argument. Their limit: they are advocacy. The speech's purpose is to win funding, and the essay itself admits the debt is "of uncertain size."

Resolving conflicts between media. Sources 1 and 5 seem to conflict: "serious" and "safe for cars, for now" versus "Crumbling." Evaluated together, they do not strictly contradict each other. The record and the anchor agree that the bridge is open with a limit; the video's title uses connotation that the data do not support. Where sources differ in precision, the more precise, better-sourced medium should govern the claim about condition, and the vivid medium should be used for what it does well, showing human stakes.

Where the packet leaves matters uncertain. No source gives an engineering recommendation between repair and replacement or says how long the bridge can safely remain open under the weight limit; no source measures how much of the damage the 1998 postponement caused; no source estimates what a 16-month-longer detour costs the families or the district; no source says whether the $310,000 painting program would prevent similar declines on the Route 9 and Harper Road bridges. A strong answer names these gaps.

A model integrated answer. The inspection record (Source 1) and its graph (Source 2) show a decline from a rating of 6 in 1998 to 3 by 2019, with a flat stretch through 2004 that is consistent with, though it does not prove, the essay's account of damage beginning after the postponed repainting. The budget memo (Source 3) shows that replacement costs less per year of service (about $81,333 compared with $96,000, assuming equal upkeep) but keeps the route closed 16 months longer, extending a bus detour of 28 extra miles per school day. The news segment (Source 5) documents that cost in human terms, though its "Crumbling" framing overstates what the record reports. On this evidence, replacement, with the lower initial cost per stated service-year, may be the stronger choice if the district can reduce the detour's burden; the preventive painting program is supported by the pattern in Sources 1 and 2, but no source measures its effect, so the commission should fund it with a follow-up inspection schedule.

Worked calculation from the memo, then across sources: Repair: $2,400,000 ÷ 25 = $96,000 per year of service. Replacement: $6,100,000 ÷ 75 = $81,333.33, about $81,333 per year. Difference: about $14,667, roughly $14,700 per year in favor of replacement. Condition: the memo assumes equal annual upkeep; if the new bridge needed less upkeep, the gap would grow; if repair were followed by a second repair before 25 years, repair would cost more still. The calculation is valid only on the memo's stated assumptions, and it uses one source. Integration step: set its result beside Source 1 (a rating of 3 since 2019, so delay carries a risk the packet does not measure) and Source 5 (one family's "twenty-five extra minutes a day," which the 16 extra months of closure would prolong).

Worked detour calculation: 7 extra miles × 4 daily trips = 28 extra miles per school day. Closure difference: 24 months − 8 months = 16 months longer for replacement. The packet does not state the number of school days in 16 months, so a precise mileage total cannot be computed from the sources; saying so is part of the evaluation.

Worked evaluation of a conflict: Source 5's title, "Crumbling Bridge Strands Students," versus Source 1's "Open to vehicles under 10 tons" and rating of 3 (serious). The two agree on a serious condition; they differ in connotation. "Crumbling" can suggest danger of collapse, which the record does not report, and "Strands" overstates a detour that still gets students to school. The inspection record, produced by inspectors on a stated scale with documented dates, governs the condition claim; the video is used for the human cost, with the parent's figure labeled as one family's report.

Source evaluation matrix: Make a table with the six sources as rows and columns headed Medium, What it shows best, What it cannot show, Reliability concerns, and Sub-question it answers (condition, cause, cost, time, human impact). Every cell must refer to specific content from the source.

Independent performance: Write a 600–800-word recommendation to the Fenwick County Commission that addresses the question by integrating at least four of the six sources, including at least one quantitative, one visual and one verbal source. Success criteria: at least one calculation is shown with its assumptions and its result is combined with evidence from at least one other source; each source is evaluated for a strength and a limitation particular to its medium; one apparent conflict between sources is resolved with reasoning about precision and purpose; at least two matters the sources leave uncertain are named; the recommendation follows from the evidence and says what further information would change it.

Media redesign: Sketch a one-page graphic that would communicate the trade-off between the two options more honestly than the news segment. Label every number with its source.