Define a parcel-level sewer-capacity verification path
The artifact identifies 57,119 included parcels where mapped sewer risk or a drainage-control trigger requires review against actual capacity.
- Scale
- 57,119
- 31% of 186,364
- Geography
- Seattle
- citywide
- Constraint codes
- verification_sewer_capacity_unreviewed
Missing capability
A documented route from the mapped trigger to a current, parcel-level capacity or connection determination.
Current routes
- Mapped sewer-risk and drainage-control screen
- Side-sewer record and SPU capacity review
Next required artifact
An infrastructure evidence memo defining authoritative records, access constraints, update cadence, parcel matching, and the conditions that resolve the review flag.
Success: A parcel can move from unreviewed to a dated, source-linked sewer determination without treating absence of evidence as available capacity.
Source artifact: gap-atlas:backyard-cottage:v1
The mapped trigger is an evidence need, not a sewer denial or a project failure. Counts can overlap with physical, financial, environmental, and other verification conditions. No utility approval or connection cost is inferred by this brief.
Published 7/26/2026