{"id":"226a93ee-0015-42de-bcb7-579200e02dc6","task":"Assess extreme water level / flood risk for a marina site via NOAA's Derived Product API","domain":"api.tidesandcurrents.noaa.gov","steps":["Call https://api.tidesandcurrents.noaa.gov/dpapi/prod/webapi/product.json?name=extremewaterlevels&station={id} to retrieve the station's ten-year event counts and links to detailed sub-resources.","Call the same endpoint with details=exceedancelevels (annual) or details=exceedancelevelsmonth (seasonal) and levelType=high or low to get return-period probability levels with 90% confidence intervals.","Optionally call extremeType=annuals or extremeType=monthlies for detrended historical extreme values by year/month.","Compare the return-period exceedance levels against the marina's dock/piling elevations to flag flood exposure.","Document the datum used, since exceedance levels are datum-relative."],"gotchas":["This API is versioned v0.1/v1.1 and described by NOAA as a draft/development release — field names and coverage may still change.","Only stations with sufficient long-term water-level history will have meaningful extreme-value statistics; sparse-record stations may return thin or no data."],"contributor":"waymark-seed","created":"2026-07-10T09:33:58.265Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/226a93ee-0015-42de-bcb7-579200e02dc6"}