Geomembrane Water Proofing of a 16.3 km Hydroelectric Structural Wood Flume
Bibliographic record
Abstract
In 2015 the authors undertook to refurbish a 16.3 km (10.1 mile) elevated wood and metal flume that was owned by a private hydroelectric company near Mount Rainier, Washington. The hydroelectric facility was originally built in the early 1900s. Water is diverted from the Puyallup River at an intake diversion and carried by a wood flume structure downstream to the hydroelectric generating plant. The flume is supported by approximately 6,200 beams of which approximately 1,200 are wooden. In many areas of the flume, the wood floors and walls were badly decayed and leaking. The plant had an operating capacity of 26 megawatts (MW) however as a result of the structural decay the flume was experiencing significant water leakage resulting in the plant only operating at 8 MW. The project started with 165,000 m2 of a high strength geotextile that was installed below the geomembrane to help structurally reinforce the deteriorating wood flume walls and flooring. The water proofing of the flume required a total of 140,000 m2 of 2.5 mm and 2.0 mm HDPE liner material to be installed. The project faced many challenges as a result of poor access and tight space constraints. There was no roadway or vehicle access other than three staging areas. All project related materials and equipment needed to be deployed using a small rail car and track built into the top of the flume structure. Crews had to deploy, weld and mechanically attach geomembrane while working in a very confined working space.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".