Evidence
13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).
-
[1]research packet 375-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-ix-528-ix528-pkt-375-packet-md
-
[2]Naval Vessel Register (NAVSEA), service craft detail page: 'Ship Details - NO NAME (IX 528) (ex - YR 55, YRDH 1)' [other_primary]
- Locator
- nvr.navy.mil getHull.htm?shipId=1757 - VESSEL STATUS, MILESTONE DATES, PROGRAM CHARACTERISTICS blocks
- Finding type
- vessel_history
- Finding
- Official Navy register entry for this hull: classification 'UNCLASSIFIED MISCELLANEOUS' IX 528, ex-YR 55, YRDH 1; hull name 'NO NAME'; UIC 22809; status 'active, in service' with date status changed 06/23/1993; builder Associated Shipbuilders; award date 03/03/1943; keel 06/23/1943; launch 09/03/1943; delivery 12/02/1943; custodian 'NAVAL SURFACE WARFARE CENTER, CARDEROCK DIV. DET. BREMERTON, SOUTHEAST ALASKA ACOUSTIC MEASUREMENT FACILITY, KETCHIKAN, AK'; planning yard Puget Sound Naval Shipyard & IMF; ships program manager PMS 300; record last updated 03/12/2025.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-03-03 to present (record updated 2025-03-12)
- Population
- Service-craft crew and SEAFAC test/maintenance personnel
- Limitations
- Authoritative for identity, builder, milestone dates, status, and custodian. The 'date status changed' 06/23/1993 is not expressly labeled as the IX redesignation - likely but not proven (see gaps). NVR currently suppresses physical characteristics ('unavailable as we update our public information policies'), so dimensions/displacement are not verifiable from this entry. Contains no asbestos, materials, or hazardous-condition information.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-01
-
[3]DANFS, Sculptor (AK-103) entry, Vol. 6 p.394 (verbatim transcription via hazegray DANFS mirror) [nhhc_danfs]
- Locator
- DANFS Sculptor (AK-103) entry, paragraph on second NTS voyage
- Finding type
- vessel_history
- Finding
- Official Navy history documents this craft's wartime deployment: USS Sculptor (AK-103), on her second Naval Transportation Service voyage beginning 27 December 1943 out of San Francisco, 'towed a floating dry dock workshop, YRDH-1, and carried a deck cargo of an LCT in sections to Espiritu Santo,' arriving 1 February 1944 - placing this hull (then three weeks past Navy delivery) at the Espiritu Santo advance base as a hull-repair workshop.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-12-27 to 1944-02-01 (documented leg)
- Population
- Craft crew during tow and Espiritu Santo service (wartime advanced-base workshop personnel)
- Limitations
- Verbatim DANFS transcription mirror - live NHHC pages return 404/block to automated fetch; transcription cross-checked against other verbatim reproductions. Documents the tow and arrival only; duration and end of Espiritu Santo service not stated. Contains no asbestos, materials, or hazardous-condition information.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-02
-
[4]U.S. Department of War / Department of Defense, 'Contracts for Jan. 15, 2026' - daily contract announcements [other_primary]
- Locator
- Contracts for Jan. 15, 2026 release, Navy section - N00167-26-D-1001
- Finding type
- vessel_history
- Finding
- Official DoD contract announcement: 'JAG Ketchikan LLC, Ketchikan, Alaska, is awarded a $27,000,000 indefinite-delivery/indefinite-quantity contract (N00167-26-D-1001) for the inspection, repair, maintenance, and preservation support services of Southeast Alaska Acoustic Measurement Facility Static Site Service Craft, IX-527 and IX-528' - a 594-day ordering period, work in Ketchikan AK, $2,842,806 FY2026 funds obligated at award, competitively procured via SAM.gov with three offers; Naval Surface Warfare Center Carderock Division, Bethesda MD, is the contracting activity.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2026-01-15 award; work through ~FY2027
- Population
- Shipyard workers (JAG Ketchikan/Vigor Alaska yard) and SEAFAC personnel, 2026-2027 ordering period
- Limitations
- Procurement record - documents a drydock-level preservation/repair event ordered on this 1943 hull but discloses no asbestos, hazardous-material, or materials-condition scope (any such scope would sit in the JCP-controlled technical package, not the public announcement). Demonstrates a maintenance-disturbance pathway only. Direct fetch of war.gov/defense.gov is Akamai-blocked (HTTP 403); text verified via the official indexed release and an independent verbatim republication (Aerotech News & Review contract briefs).
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-03
-
[5]SAM.gov presolicitation N0016725R1001, 'SEAFAC Barge IX-527 and IX-528 Overhaul' (NSWC Carderock, posted 2025-02-25; verbatim republication via SAMDaily.us) and subsequent barge-tour/Industry Day notice under the same requirement [other_primary]
- Locator
- SAMDaily.us (fbodaily.com) issue of 2025-02-27, notice N0016725R1001; BidNet mirror of the July 2025 Industry Day announcement (N0016725R1001, NSWCCD)
- Finding type
- vessel_history
- Finding
- Government solicitation record naming this hull: NSWC Carderock's requirement for 'preservation, inspection, repair, and maintenance services for the SEAFAC Static Site IX-527 and IX-528 Barges located in Back Island, near Ketchikan, Alaska,' including drydocking - the notice states the barges are 'permanently moored' at SEAFAC, 'do not meet stability criteria for towing in open ocean unprotected waters,' and can reach only a shipyard accessible through protected inland waters (Vigor Alaska, Ketchikan, the sole such yard); a July 22, 2025 Industry Day offered guided tours of both barges, with barge drawings and technical information controlled under the Joint Certification Program.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2025-02-25 to 2025-07-22 notices
- Population
- Prospective shipyard/barge-tour attendees; drydock and preservation trades
- Limitations
- Presolicitation/industry-day record - the planned sole-source award to Vigor was superseded by the competitive JAG Ketchikan award (ev-03); the work scope describes drydock overhaul events on the hull but contains no asbestos or hazardous-material content. Verbatim mirror of the SAM.gov notice used because sam.gov opportunity text is session-gated; solicitation number, dates, NAICS 336611, and PSC J019 all consistent across mirrors.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-04
-
[6]NAVSEA, 'Southeast Alaska Acoustic Measurement Facility - Ketchikan, Alaska' official page; navy.mil feature 'The Quiet Waters of Southeast Alaska' (article 2249044); NAVSEA 'Inside the History of Detachment Puget Sound' (article 2267565); NWTT SEIS/OEIS SEAFAC poster and fact sheet (nwtteis.com) [other_primary]
- Locator
- navsea.navy.mil SEAFAC page (Static Site paragraph); navy.mil article 2249044; navsea.navy.mil article 2267565; nwtteis.com SEAFAC poster/fact sheet PDFs
- Finding type
- vessel_history
- Finding
- Official Navy documentation of the facility this hull serves: NAVSEA states SEAFAC's Static Site 'can test vessels of all sizes and types moored or suspended between surface barges,' with submarines suspended on cables between barges and underwater arrays while propulsion is secured; the navy.mil feature records SEAFAC established 1991 on Back Island (a 15-acre parcel leased from the U.S. Forest Service) after the Carr Inlet Acoustic Range and the California SCARF range became too noise-impaired; the NAVSEA Detachment Puget Sound history dates the suspension-barge static-site technique to 1969 at CIAR and records CIAR/SCARF disestablished 1992 and replaced by SEAFAC; the NWTT EIS fact sheet states Navy RDT&E at SEAFAC has run since March 1992.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- 1969 (technique origin) - present
- Population
- Submarine crews under test; SEAFAC test teams
- Limitations
- Facility-level sources - they describe the static-site barge function but do not name IX-528 by hull number; the hull-to-facility link is the NVR custodian line (ev-01). Whether this specific hull served at CIAR before SEAFAC's 1992 stand-up is unverified (see gaps). No asbestos or materials content.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-05
-
[7]33 CFR 334.1275, 'West Arm Behm Canal, Ketchikan, Alaska, restricted areas' (Corps of Engineers danger-zone regulation) [federal_register]
- Locator
- 33 CFR 334.1275(a), Areas No. 1-5
- Finding type
- regulatory
- Finding
- Federal regulation codifies the restricted-area complex around the facility where this hull is permanently moored: five restricted areas in Behm Canal/Clover Passage off Back Island, including two 2,000-yard-diameter water circles centered at 55 deg 36 min N / 131 deg 49.2 min W and 55 deg 34 min N / 131 deg 48 min W - the underway and static measurement areas served by the permanently moored barges.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- codified regulation, current edition
- Limitations
- Regulatory footprint of the test site, not a hull record - does not name IX-528 and contains no asbestos information; included to document the permanence of the mooring site described in the solicitation record (ev-04).
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-06
-
[8]NavSource Online Service Ship Photo Archive, IX-528 (ex-YRDH-1, ex-YR-55) page - including a U.S. Navy photo from Ships' Data U.S. Naval Vessels 1952 showing YRDH-1 at anchor in San Diego Bay, CA, 1952 [other_primary]
- Locator
- navsource.net/archives/14/3355.htm - chronology block and 1952 photo caption
- Finding type
- vessel_history
- Finding
- Compiled service-craft record for this hull: planned as Floating Workshop YR-55; redesignated Floating Dry Dock Workshop (Hull) YRDH-1 prior to start of construction 1 May 1943; delivered and placed in service 2 December 1943 (NavSource asserts 'at Pearl Harbor Navy Yard, T.H.'); a U.S. Navy photograph sourced to Ships' Data U.S. Naval Vessels 1952 documents YRDH-1 at anchor in San Diego Bay in 1952; spec block lists displacement 460 t (lt) / 750 t (fl), 151 ft x 35 ft x 6 ft, accommodations 1 officer + 46 enlisted, one 60 kW diesel generator set; redesignated IX-528 'date unknown'; states no DANFS history exists for the craft.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-1952 documented points; page last updated 2014-08-29
- Limitations
- Secondary volunteer-run compilation - treated as an archival lead, not a primary record. Internally inconsistent (gives 3 September 1943 for both laid down and launched; NVR keel date is 06/23/1943 - adopted) and its Pearl Harbor Navy Yard delivery claim conflicts with the DANFS-documented San Francisco tow departure 27 December 1943 (ev-02) - flagged, not adopted. The 1952 San Diego photo is a genuine primary artifact embedded in the compilation.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-07
-
[9]Corn, Jacqueline Karnell, and Jennifer Starr, 'Historical perspective on asbestos: Policies and protective measures in World War II shipbuilding,' American Journal of Industrial Medicine 11(3):359-373 (1987) [other_primary]
- Locator
- AJIM 11(3):359-373, abstract and article
- Finding type
- asbestos_application
- Finding
- Peer-reviewed scholarship documents that asbestos was used extensively as insulation, fireproofing, and component material in U.S. shipbuilding during WWII, the era and program under which this 1943 naval service craft was built - wartime demand drove unprecedented asbestos utilization across naval and merchant construction, including auxiliaries and yard craft.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1940s era documented; article 1987
- Population
- WWII shipyard workers and naval craft crews (era context)
- Limitations
- Era/program-level documentation - does not name this craft or its class and does not establish that asbestos was or remains aboard this hull, nor quantity, location, condition, exposure, or causation. A non-self-propelled floating workshop lacks the boiler/steam-plant inventory typical of propelled hulls; era inference applies to accommodation insulation, electrical gear, gaskets/packing, and linings only.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-08
-
[10]Tongass Conservation Society v. Cheney, 924 F.2d 1137 (D.C. Cir. 1991) (verbatim F.2d reproduction) [court_record]
- Locator
- 924 F.2d 1137 (D.C. Cir. 1991), No. 90-5106; district court No. 89-2063 (D.D.C. Nov. 9, 1989)
- Finding type
- litigation_documented
- Finding
- Facility-level litigation on the litigation sweep: environmental groups challenged under NEPA the adequacy of the Navy's EIS for 'the Southeast Alaska Acoustic Measurement Facility (SEAFAC), the Navy's planned submarine testing range in Behm Canal, near Ketchikan, Alaska' - tracing the EIS record (draft EIS 1987, FEIS March 1988, addendum February 1989, record of decision April 1989); the D.C. Circuit affirmed judgment for the Navy. The opinion documents the siting record for the facility where this hull is now permanently moored.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- 1986-1991 (EIS process and litigation)
- Limitations
- Classified at litigation-sweep stage: a facility-level NEPA suit that does not name this craft, involves no asbestos claim, and makes no finding about the hull - 'other litigation,' not qualifying asbestos litigation. Included so the facility's documented legal record is not confused with vessel-level exposure litigation.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-09
-
[11]Batch-4834 search ledger (this record): NVR service-craft entry; NHHC DANFS (no entry exists for YR-55/YRDH-1/IX-528); DANFS Sculptor transcription; NavSource service-craft archive; SAM.gov/DoD procurement notices; CourtListener opinion and docket indexes; SEAFAC EIS/regulatory materials; Alaska DEC SPAR [other_primary]
- Locator
- search_ledger rows sl-uss-ix-528-ix528-01 through sl-uss-ix-528-ix528-15
- Finding type
- historical_record
- Finding
- No qualifying ship-specific record located: no asbestos survey, abatement contract, hazmat disclosure, materials record, or docketed asbestos case naming IX-528, YRDH-1, or YR-55 was found in the public sources searched (see search_ledger). The only litigation surfaced is facility-level (Tongass, ev-09) and two CourtListener docket string collisions unrelated to the vessel.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2026-09-29
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1943 hull in continuous Navy service undergoes documented periodic drydock overhaul (ev-03, ev-04), and any hazardous-material condition data would sit in the JCP-controlled technical package and shipyard records, not public sources. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-10
-
[12]NARA record-group mapping: RG 19 (Bureau of Ships - service-craft plans, booklets, and maintenance records); NVR custodian/planning-yard records; the JCP-controlled barge drawings referenced in the 2025 Industry Day notice; SEAFAC FEIS (1988) and addendum (1989) files [other_primary]
- Locator
- archives.gov/research/guide-fed-records/groups/019.html; NVR planning-yard line (ev-01); BidNet Industry Day notice JCP paragraph
- Finding type
- historical_record
- Finding
- Archival leads (not retrieved - require research-room work or JCP certification; no spend authorized): NARA RG 19 Bureau of Ships records should hold YRDH-1's construction plans and the BuShips/NavShips 'booklet of general plans' and machinery data for the 1943 build - the classic source in which asbestos-containing materials are specified by product name; Puget Sound Naval Shipyard & IMF records may document the 1993 status change and any CIAR-era service; the barge drawings cited in the 2025 Industry Day notice are export/technical-data controlled (JCP) and would show current tank/space configuration; the 1988-1989 SEAFAC FEIS file may describe the static-site barge outfitting as sited.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- 1943-present records
- Limitations
- Record-group and document-mapping only - no retrieval performed; existence of asbestos-specific documents for this hull is unknown until surveyed. Nothing in this row is an asbestos finding.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-11
-
[13]Cross-source discrepancy check: NVR service-craft entry vs NavSource IX-528 page vs shipbuildinghistory.com YR/YRDH build tables vs DANFS Sculptor vs jounin.jp uswarships tables [other_primary]
- Locator
- navsource.net/archives/14/3355.htm chronology; shipbuildinghistory.com/smallships/yr.htm YR and YRDH tables; NVR milestone block; DANFS Sculptor; uswarships.jounin.jp/yrdh.htm
- Finding type
- historical_record
- Finding
- Source discrepancies resolved or flagged: (a) Keel date - NavSource prints 'laid down, 3 September 1943' identical to its own launch date (impossible for a launched hull); NVR records keel 06/23/1943 and launch 09/03/1943 (jounin concurs) - NVR adopted. (b) Delivery location - NavSource and jounin assert 'delivered and placed in service at Pearl Harbor Navy Yard, T.H.' on 12/02/1943; DANFS documents the craft under tow departing San Francisco 12/27/1943 for Espiritu Santo - a Pearl Harbor placement followed by return to the West Coast in 25 days is inconsistent; NVR gives the delivery date without a location - location unresolved, DANFS tow timeline controls the deployment narrative. (c) Builder - shipbuildinghistory's YRDH table credits 'Puget Sound Bridge' (Seattle) for YRDH-1 while its own YR-55 row, NVR, NavSource, and jounin all give Associated Shipbuilders (Seattle) - NVR adopted, conflict logged.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943
- Limitations
- Corrects published framing conflicts among official and compiled sources; none of these sources contains asbestos or materials information. Does not affect identity or the current-status record.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-528-ix528-12