Seymour-Capilano Water Filtration Project: Steel — The Product of Choice
Bibliographic record
Abstract
The Greater Vancouver Water District (GVWD) is constructing the $600 million Seymour-Capilano water filtration project to enhance drinking water quality in the Vancouver metropolitan area. The project comprises the Seymour-Capilano Filtration Plant, the Capilano Pumping Station, the Twin Tunnels with associated shafts and the Capilano Break Head Tank/Energy Recovery Facility. The Twin Tunnels will convey untreated, raw water under pressure from the Capilano Reservoir to the Seymour-Capilano Filtration Plant and return treated water for distribution to the member municipalities. The tunnel system comprises twin 3.7 meter diameter tunnels approximately 7.2 km in length, the 11 meter diameter, 180 meter deep Seymour shaft as the main launch shaft, and two 4 meter diameter, 268 meter deep raisebore exit shafts at Capilano. Among the numerous complexities of a project of this scope was the selection of pipe materials, including the lined Twin Tunnels portion of the project. Steel pipe was the only tunnel lining material, of several that were considered, that offered the required combination of being completely water tight at the high water pressures associated with this application, capable of resisting the buckling loads, providing seismic properties required and providing acceptable constructability. The GVWD also has a long history and good experience of using steel pipe as the transmission water main material of choice. These items and high seismic design standard led the GVWD to select steel pipe for use on the Seymour-Capilano filtration project. Project construction commenced in 2003 and is expected to be complete by the end of 2008. Once completed, the GVWD will reliably deliver water of quality in full compliance with the Canadian Drinking Water Quality Guidelines and the Provincial Drinking Water Protection Regulation.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.003 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.039 | 0.010 |
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".