Concrete Solutions: Repurposing Existing C76 Gravity Pipe to Save $1M and Costly Permitting Delays
Bibliographic record
Abstract
The water surface elevation (WSEL) of the existing Highline Canal is approximately 20 ft above the WSEL of the existing San Tan Canal (STC), where the reclaimed water from the City of Mesa would be discharged, necessitating the design and construction of a low-head gravity pipeline of varying diameters. The alignment of the gravity pipeline crosses a spur of the Union Pacific Railroad (UPRR) and Arizona State Highway 87. Near this crossing is a 350-ft segment of abandoned 24-in. C-76 concrete gravity pipeline housed in a steel casing and hydraulic modeling suggested that incorporating this abandoned pipeline into the alignment of the proposed low-head gravity pipeline was feasible. Unfortunately, the existing pipe condition is structurally inadequate. Repurpose the existing C-76 gravity pipeline and manholes with a Sprayed-in-Place pipe (SIPP) liner saved months, or years, of schedule delays, and upwards of a million dollars in permitting and construction of a new trenchless crossing.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.036 | 0.008 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".