Sewer Pipeline Material Selection Is Easy, Right? It’s More Complex Than You Might Think
Bibliographic record
Abstract
The City of San Mateo, CA, commissioned the planning, preliminary design, and final design of the Basins 2 and 3 Collection System Improvements (CSI) Project (herein referred to as the Project) with an objective of mitigating Sanitary Sewer Overflows (SSOs) within a large section of the City. To achieve the objective, the project identified locations in the City’s sewer system that were under capacity by utilizing hydraulic modeling to pinpoint areas of the sewer network prone to SSOs during wet weather events. Results of the hydraulic modeling led to development of several sewer design packages to enhance the collection system’s capacity to mitigate SSO occurrences. Each design package utilized various construction techniques and a variety of pipe materials. This paper provides a project case study and focuses on the details of the engineering solutions and the rationale behind why the selected pipeline materials were chosen.
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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 | 0.005 | 0.011 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.003 | 0.004 |
| Scholarly communication | 0.005 | 0.006 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.003 | 0.003 |
| Insufficient payload (model declined to judge) | 0.020 | 0.007 |
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".