WRECK
ARCHIVE

The master archive is maintained as a structured CSV spreadsheet and updated as new data is available. It includes all survey data, source references, footage status, and field notes for every cataloged target in Lake Union and connected waterways.

The Archive Dataset has not been fully verified and is a working document with inaccuracies. At the end of the document, it will be reviewed for accuracy and officially released.

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Field	Description
Target Identity
target_no	Unique catalog number (e.g. LU001). Assigned sequentially from the CSS sonar survey baseline.
target_name	Known vessel name, if positively identified. Nicknames indicated with '***'. Otherwise Unknown.
type	General vessel category (Shipwreck, Debris, Infrastructure, Vehicle, or Unknown).
subtype	More specific classification where known (e.g. Landing Craft, Sailboat, Dock section).
material	Hull construction material (Wood, Metal, Fiberglass, Unknown, etc.).
Location & Physical
longitude	GPS coordinate in decimal degrees (WGS84). Derived from sonar survey centroid.
latitude	GPS coordinate in decimal degrees (WGS84). Derived from sonar survey centroid.
depth_ft	Depth to wreck in feet, measured at the shallowest point of the hull.
dimensions_ft	Estimated length × beam (width) in feet. Diver measurements or side scan estimate (where both are available, diver taken as truth). ROV surveys did not contribute to dimensions.
target_description	Brief free-text summary description of the target.
Coastal Sensing and Survey (High-Resolution Side Scan Survey)
css_surveyed	Whether this target appeared in the CSS side-scan sonar survey of Lake Union.
css_survey_date	Date the CSS sonar survey was conducted for this target.
css_dimensions	Dimensions as measured from CSS sonar data.
css_historically_explored	Whether CSS records indicate prior historical exploration of this target (CSS themselves only explored JE Boyden with an ROV).
css_description	These are the original target names from the CSS survey log.
css_url	Link to the CSS public survey record for this target.
DCS Films (Scuba Dive Records)
dcs_target_no	DCS Films' internal target reference number, where applicable.
dcs_scuba_footage	Whether DCS Films captured scuba dive footage of this target.
dcs_scuba_date	Date DCS Films conducted their scuba dive on this target.
dcs_dimensions	Dimensions recorded by DCS divers during in-water survey. The values are considered more accurate than side scan measurement.
dcs_notes	Notes of names and dimensions from start of DCS Films videos (more information exists at their url).
dcs_url	Link to DCS Films footage and/or historical documentation for this target.
Shipwreck City (ROV Dives)
sc_current_footage_status	Current exploration status: No Footage (no public footage is available or known), Historical Footage (footage available from DCS or other source), Updated Footage (SC completed an ROV dive to update Historical Footage), First Footage (SC completed an ROV dive where no footage was available)..
sc_initial_footage_status	Footage status before Shipwreck City involvement — establishes the baseline before work started.
sc_newly_uncovered	Yes if this target was not present in any prior survey and was first logged by the Shipwreck City effort.
sc_rov_dive_duration	Duration of Shipwreck City ROV dive in hours.
sc_rov_dive_date	Date of the Shipwreck City ROV dive.
sc_notes	Shipwreck City field notes, observations, and identification context.
sc_url	Link to Shipwreck City footage or documentation for this target.
sc_howto_access	Nearest access point to visit target (Specific marina or via Boat).