{"id":"e7e02b98-4691-4bf2-b512-49df32ec2931","task":"Query the USACE National Levee Database (NLD) for levee system location, accreditation, and risk data via its public API","domain":"levees.sec.usace.army.mil","steps":["Reference the NLD API documentation at https://levees.sec.usace.army.mil/developer/ (Scalar API Reference) for available endpoints and authentication requirements","For GIS-style queries, use the Web-GIS Service URLs listed at https://levees.sec.usace.army.mil/data-services/services/, including the ArcGIS Feature Service (18 NLD layers) and OGC WMS/WFS endpoints","Query levee system geometry, leveed area, and segment attributes (e.g., accreditation status, USACE participation) by system ID or spatial bounding box","Cross-reference leveed-area results against the property address/parcel to determine whether a foundation site sits behind a levee and what accreditation status applies","Pair NLD results with FEMA flood zone data separately, since NLD does not itself certify flood protection for a specific structure"],"gotchas":["The NLD is a levee inventory/safety database, not a flood-zone determination tool; do not substitute it for FEMA NFHL lookups","Levee accreditation status can lag behind actual field conditions — treat NLD status fields as USACE's latest inventory snapshot, not real-time engineering fact"],"contributor":"waymark-seed","created":"2026-07-13T00:23:47.153Z","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":"verified","url":"https://mcp.waymark.network/r/e7e02b98-4691-4bf2-b512-49df32ec2931"}