Answer A: OpenAI GPT-6 Sol
On 14 March, a trunk main ruptured at Carrow Bend, cutting water to about 41,000 households in eastern Linmouth and Saltreach for 19 to 63 hours. Another 12,000 households in Ferrisford faced a precautionary six-day boil-water notice. An independent panel found that corrosion, waterlogged ground and a likely pressure surge contributed to the break. It judged the rupture not reasonably preventable in the short term, but said the scale and duration of the disruption were largely preventable. The high-risk main was due for replacement in 2020, but funds were diverted amid pandemic-era pressures and later to meet a l...
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On 14 March, a trunk main ruptured at Carrow Bend, cutting water to about 41,000 households in eastern Linmouth and Saltreach for 19 to 63 hours. Another 12,000 households in Ferrisford faced a precautionary six-day boil-water notice. An independent panel found that corrosion, waterlogged ground and a likely pressure surge contributed to the break. It judged the rupture not reasonably preventable in the short term, but said the scale and duration of the disruption were largely preventable. The high-risk main was due for replacement in 2020, but funds were diverted amid pandemic-era pressures and later to meet a lead-pipe deadline. Each delay was defensible individually, the panel said, but the board lacked a combined view of accumulating risk.
Isolation took nine hours rather than the expected two after three of seven valves failed to close fully. One had not been exercised since 2011. Annual valve maintenance averaged 6 percent against a 20 percent target, a shortfall the panel linked to cutting the dedicated crew from eight staff to five. The delay drained Saltreach’s reservoir, extending outages. Text alerts reached only 38 percent of affected households; water distribution sites favoured car owners, and 214 of 1,140 registered vulnerable customers were not contacted within 24 hours. The panel praised call-centre staff, who handled about 17,500 calls.
Two panel members proposed a ring-fenced bill surcharge of about 4 percent for ten years to accelerate main replacement. The dissenting member argued that existing funds, including 9.5 million earmarked for headquarters refurbishment, and national grants should be pursued before customers pay more. Replacement, estimated at 6.8 million in 2020, is now expected to cost 11.2 million. The board accepted four recommendations fully, but accepted replacement of three high-risk mains only in principle; funding will be decided in September after public consultation. It offered 45 per household for outages exceeding 24 hours. The panel found no evidence of drinking-water contamination or illness.
Result
Winning Votes
3 / 3
Average Score
Total Score
Overall Comments
Answer A is a remarkably comprehensive summary that successfully incorporates almost every specific metric and requirement from the prompt while adhering to all format constraints (310 words, three paragraphs, neutral prose). Its only slight weakness is structural: it places the replacement cost figures (6.8 million rising to 11.2 million) in the third paragraph alongside the funding dispute, rather than in the first paragraph with the discussion of the deferred replacement.
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Faithfulness
Weight 40%Faithful and accurate to the source. It captures the panel's critical distinction accurately ('not reasonably preventable in the short term').
Coverage
Weight 20%Covers all eight required points with impressive precision, preserving almost all key metrics specified in the prompt.
Compression
Weight 15%Demonstrates exceptional density and concision, packing extensive factual detail into 310 words without losing readability.
Clarity
Weight 15%Clear, objective, and accessible for local newspaper readers, though the abrupt insertion of replacement costs in paragraph three slightly interrupts the flow.
Structure
Weight 10%Well-formatted into three continuous prose paragraphs without headings or bullets. The placement of the 2020/current cost figures in paragraph three feels slightly disconnected from the delay explanation in paragraph one.
Total Score
Overall Comments
Answer A is an accurate, neutral and comprehensive summary that meets the length and paragraph requirements. It preserves important qualifications, explains the deferred replacement and maintenance failures, and presents the funding disagreement fairly. Minor omissions include the alert system's shortcomings, the four-year replacement timetable and the regulatory compensation minimum. The replacement cost comparison would fit more naturally alongside the explanation of the deferrals.
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Faithfulness
Weight 40%Preserves the distinction between a rupture not reasonably preventable in the short term and consequences that were largely preventable. It correctly treats the pressure surge as likely, retains the panel's finding that individual deferrals were defensible, and accurately reports the key numbers and competing funding positions.
Coverage
Weight 20%Covers all eight required areas with substantial supporting detail, including cumulative risk, replacement costs, valve maintenance rates, crew sizes, vulnerable-customer figures, the ten-year surcharge and consultation before September's decision. It omits the alert system's underlying problems, the four-year replacement deadline and the compensation minimum.
Compression
Weight 15%Fits a notably broad selection of relevant facts into the 230–320-word limit without bullets or excessive shorthand. Almost every sentence contributes directly to a required topic, although some lower-priority figures could have been traded for the alert-system explanation.
Clarity
Weight 15%Uses accessible language and clearly connects staffing cuts, valve failures, reservoir drainage and longer outages. The final paragraph is dense, and placing the replacement cost comparison there separates it from the deferral explanation.
Structure
Weight 10%Uses three continuous-prose paragraphs with no headings or bullets, moving logically from the incident and asset management to emergency response and then funding and board action. The final paragraph combines several distinct topics but remains coherent.
Total Score
Overall Comments
Answer A is a tight, accurate summary that preserves nearly every key figure from the source (41,000 households, 19 to 63 hours, 12,000 under a six-day notice, three of seven valves, nine hours versus two, 6 percent versus 20 percent, crew cut from eight to five, 38 percent alert reach, 214 of 1,140 vulnerable customers, 17,500 calls, 4 percent for ten years, 9.5 million headquarters budget, 6.8 to 11.2 million, September decision after consultation, 45 compensation). It correctly keeps the nuance that the rupture was not reasonably preventable in the short term while the disruption was largely preventable, and it captures the panel's systemic finding that the board lacked a combined picture of deferred risk. The funding dispute is stated even-handedly. Minor gaps: it omits the 30 regulatory minimum, the chief executive's apology, and does not explicitly restate that the boil notice was judged a justified precaution in the illness finding (though it calls the notice precautionary earlier). The cost-rise sentence sits a little awkwardly in the funding paragraph, and at roughly 316 words it is close to the ceiling.
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Faithfulness
Weight 40%All figures and attributions check out against the source; nuances such as 'not reasonably preventable in the short term' and 'largely preventable' are preserved, the two deferral reasons are correct, and the funding dispute is presented neutrally with both positions accurately paraphrased. No invented details. Only small omissions (30 minimum, apology) rather than errors.
Coverage
Weight 20%Covers all eight required elements with their key numbers, including the combined-risk-picture finding, 6 vs 20 percent valve exercising, crew cut from eight to five, 214 of 1,140 vulnerable customers, call centre praise, 9.5 million headquarters budget, September decision after consultation, 45 compensation, and the no-contamination finding. Omits the 30 regulatory minimum and the apology.
Compression
Weight 15%About 316 words, inside the limit though near the ceiling. Word budget is spent on the most decision-relevant figures and findings, with minor items (exact time, pipe diameter, rainfall) sensibly dropped.
Clarity
Weight 15%Sentences are direct and understandable for general readers; cause-and-effect links (valve failures leading to reservoir draining and longer outages; crew cut leading to maintenance shortfall) are explicit. Dense in places, and the cost-rise sentence appears somewhat out of context in the funding paragraph.
Structure
Weight 10%Three balanced paragraphs with a logical progression: incident and causes, response failures, funding dispute and board response. Only flaw is the cost figure placed in the funding paragraph rather than with the deferral history.