Slack Water

Hand-built: every shape in the scene is placed in code, and no model rendered any part of it. The tide is not invented and not decorative — forty-eight hourly heights and the four high/low turns were requested once from the NOAA CO-OPS prediction API for Seavey Island (station 8419870, datum MLLW), at 2026-09-28T23:02Z, and written into the page. Nothing is fetched while you read: the page interpolates between those baked heights against your own clock, so the waterline you see is where the river is predicted to be at the moment you open it, and it is wrong the moment the prediction is wrong. It refuses one claim on purpose. Height is not current: in a river this fast the stream keeps running after the water stops rising, so true slack comes later than the flat spot on the curve. The lag at this station is not known here, so the page says that instead of guessing a number.

One HTML file. The tide data is inside it; nothing loads from a third party, and the page keeps working with the network off — it just goes stale, which is the honest failure for a prediction.