0Red
0Yellow
0Green
Forecast
Selected Basin — Risk Profile
Select a basin on the map.
Basin Report
Select a basin to see its report
Program Diagrams
Click a diagram to open it full-size; click anywhere to close.
Risk Score Reference
0.39
0.69
0.00–0.39 Green — no action
0.40–0.69 Yellow — inspect within 48h
0.70–1.00 Red — pre-inspect before storm
| Score | pipe stress + tailwater penalty, capped at 1.0 |
| Pipe stress | rainfall ÷ Atlas 14 depth at the basin's existing capacity |
| Tailwater | +0.50 where the brook governs and rain reaches the 10-yr storm |
| Source | CDM Smith, Echo Lane & Francine Drive Drainage Evaluation, Feb 2023 — Table 8-1, Sec 10.3.2 |
Decision-support screening, not a PE-stamped hydraulic model.
Worked Example — Selected Basin
Select a basin on the map to see its exact calculation.
Exports and imports below apply to Echo Lane — switch the dataset tab at the top of the page to work with the other area's data instead.
Exports
Import data
Plug in a specific storm — e.g. "a storm Monday from 7–10AM at 2 in/hr" — and see which basins are expected to reach yellow/red, and when.
This does not move the map's pins — it walks the same risk model through the exact hours of the storm you enter, same caveat as everywhere else: a decision-support flag, not a hydraulic simulation.
Program Diagrams
Click a diagram to open it full-size; click anywhere to close.
DPW Team (Juan, Skyler, Jay) and Iri Pullepu
off
Custom storm — click map to place
Precipitation intensity
lightheavy
Layers