Evidence
7 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-7).
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[1]research packet kv-packet.md (1 sources cited) [nhhc_danfs]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-john-j-powers-de528-pkt-kv-packet-md
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[2]DANFS, John J. Powers (DE-528) (verbatim transcription - live NHHC page serves 404); DANFS spec block via hazegray mirror (losthistory.net): cl. Evarts; dp. 1,140; cpl. 186; s. 21 k. [nhhc_danfs]
- Locator
- DANFS entry, spec block + full service narrative
- Finding type
- vessel_history
- Finding
- DANFS record for this hull: laid down 25 September 1943 by Boston Navy Yard; launched 2 November 1943; sponsored by Mrs. John J. Powers, mother of the namesake; commissioned 29 February 1944, Lt. Comdr. E. W. Loew in command. Shakedown off Bermuda; antisubmarine exercises at Boston; convoy escort to northern Europe (departed 2 May 1944), a second convoy (arrived Boston 2 August 1944); Halifax coastal run; convoy of tankers and barges to England departing 19 September 1944 (rescued four crewmen from capsized Army tug ST-719); December 1944 special depth-charge tests for the Bureau of Ordnance off New York and in Chesapeake Bay; three further escort voyages to Casablanca, departing Mers-el-Kebir 7 May 1945; then Miami as a training ship for student officers in the Straits of Florida. Decommissioned at Charleston 16 October 1945; scrapped by Charleston Navy Yard February 1946. Spec block (mirror): Evarts class; 1,140 tons; complement 186; 21 k.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-28
- Study period
- 1943-1946
- Population
- Boston Navy Yard construction trades 1943-44; wartime crew (design complement 186)
- Limitations
- DANFS documents service history and class characteristics, not materials or asbestos content. The spec-block complement (186) and speed (21 k) differ from the NavSource class spec (15+183; 19 k) - carried in gaps. Mirror transcription cited because the live NHHC page returns 404.
- Atlas source
- true
- Evidence ID
- ev-uss-john-j-powers-de528-01
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[3]NPS, 'Ships Built By The Charlestown Navy Yard,' Stephen P. Carlson, Division of Cultural Resources, Boston National Historical Park, 2005 (npshistory.com mirror) [nps]
- Locator
- Alphabetical ship table, 'John J. Powers' row; photo gallery caption BOSTS-11528
- Finding type
- historical_record
- Finding
- Official NPS yard history for the builder independently confirms this hull's construction record: table entry 'John J. Powers - Escort Vessel - DE-528 - 1943 Sep 25 (laid down) - 1943 Nov 2 (launched) - 1944 Feb 29 (commissioned) - Sold 1946.' The same publication reproduces official U.S. Navy photograph BOSTS-11528, USS John J. Powers in Boston Harbor on 27 April 1944 (during post-shakedown yard availability).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-28
- Study period
- 1943-1946; publication 2005
- Population
- Charlestown Navy Yard workforce, 1943-44 construction
- Limitations
- NPS publication documents the yard's construction output and dates, not materials or asbestos content. 'Sold 1946' vs. DANFS 'scrapped by Charleston Navy Yard February 1946' - both describe disposal; the sale/scrapping distinction is noted, not resolved. Direct PDF fetch returned 403 to the agent; text extracted from the downloaded document via pdftotext.
- Atlas source
- true
- Evidence ID
- ev-uss-john-j-powers-de528-02
-
[4]NHHC, 'United States Naval Aviation 1910-1995,' Appendix 12: Ships Named for Naval Aviators (Wayback capture 2015-01-23; live PDF now 404) [other_primary]
- Locator
- Appendix 12 table, 'Powers, John J. (DE 528)' row
- Finding type
- historical_record
- Finding
- Official NHHC aviation-history appendix confirms the namesake and hull: 'Powers, John J. (DE 528) - LT John J. Powers, USN - 29 Feb 1944' (commissioning date). Namesake Lt. John James Powers was a Bombing Squadron 5 (USS Yorktown, CV-5) pilot posthumously awarded the Medal of Honor for attacks at the Coral Sea, May 1942.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-28
- Study period
- 1944
- Limitations
- Confirms namesake, hull number, and commissioning date only - no materials or asbestos content. Live history.navy.mil PDF returns 404; 2015 Wayback capture of the official document cited.
- Atlas source
- true
- Evidence ID
- ev-uss-john-j-powers-de528-03
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[5]Era/design inference - Evarts-class GMT spec block (NavSource class data; DANFS spec block via hazegray mirror) + Atlas shipyard dataset records for boston-naval-shipyard and charleston-naval-shipyard [other_primary]
- Locator
- NavSource DE-528 spec block; hazegray DANFS spec line; shipyards.json records 'boston-naval-shipyard' and 'charleston-naval-shipyard'
- Finding type
- asbestos_application
- Finding
- Era/class inference only: this hull is an Evarts-class GMT-type escort - four GM 16-278A diesels with diesel-electric tandem-motor drive, 6,000 shp, twin screws - with no boilers or steam turbines, so the boiler/steam-pipe insulation suite documented for steam-propulsion DEs does not apply. Period-standard asbestos applications for a 1943-44 escort of this type center on machinery-space and diesel-exhaust/muffler insulation, gaskets and packing on pumps/valves, bulkhead insulation, and interior deck coverings. Both associated yards have yard-level asbestos documentation in the Atlas dataset: Boston Naval Shipyard (builder; tier 3, incl. John Crane gaskets/sealing materials) and Charleston Naval Shipyard (scrapping site, Feb 1946; tier 2, extensive product list incl. asbestos cement, pipe insulation, gaskets, packing, fireproofing).
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-28
- Study period
- 1943-1946
- Population
- Boston Navy Yard construction trades 1943-44; crew 1944-45; Charleston Navy Yard scrapping workforce 1946
- Limitations
- Class/era and builder-yard inference only - no ship-specific finding. Establishes no quantities, no individual exposure, and no confirmation that any specific material aboard contained asbestos. Yard dataset rows document the yards, not this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-john-j-powers-de528-04
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[6]CourtListener API v4 sweep, 2026-09-28 (opinion type=o and RECAP type=r indexes): "USS John J. Powers", "USS Powers", "John J. Powers", "DE-528" [court_record]
- Locator
- CourtListener API v4 search, type=o and type=r, queries as listed
- Finding type
- litigation_documented
- Finding
- No qualifying asbestos litigation naming this hull located. Results: "USS John J. Powers" opinions - 0; "USS Powers" opinions - 0; "DE-528" opinions - 9 hits, all collision noise (docket/form numbers, e.g. SEC filings and state cases, none vessel-related); "DE-528" RECAP - 92 hits, all PACER docket-entry-number collisions ('DE 528' = docket entry 528); "John J. Powers" RECAP - 79 hits, all person-name collisions (bankruptcy petitions and prisoner civil-rights filings by individuals named John J. Powers). No opinion or docket located in which the vessel USS John J. Powers (DE-528) is named as an exposure site or otherwise.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-28
- Study period
- 2026-09-28
- Limitations
- A litigation sweep establishes the state of the public index on the search date, not the absence of all litigation - state-court filings and undocketed matters are outside CourtListener coverage. Several opinion-side queries ("John J. Powers" type=o; "John J. Powers" asbestos) were attempted but deferred by fleet pacing - see search_ledger; RECAP person-name hits were reviewed by case caption and none is vessel-related.
- Atlas source
- true
- Evidence ID
- ev-uss-john-j-powers-de528-05
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[7]NARA series: 'Logbooks of the U.S. Navy Ships and Stations, 1941-1978' (NAID 594258), National Archives [other_primary]
- Locator
- catalog.archives.gov series NAID 594258 ('search within series' by hull number DE-528)
- Finding type
- historical_record
- Finding
- Archival lead: this hull's deck logs for its full commissioned period (February 1944 - October 1945, about 19 months) should exist in NARA series NAID 594258; WWII-era deck logs in this series are digitized or in progress in the National Archives Catalog. NARA's catalog API did not return a machine-readable result for this hull this session, so digitization status for DE-528 specifically is unverified. Deck logs record locations and underway status, not materials - they would support exposure-window reconstruction (e.g., the December 1944 Bureau of Ordnance depth-charge tests, Casco Bay and Miami training duty) but do not themselves document asbestos.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-28
- Study period
- 1944-1945
- Population
- Wartime crew (design complement 186)
- Limitations
- Unretrieved primary source. Even if located, deck logs would not directly establish asbestos content; they corroborate where the ship was and when. Catalog API blocked/gated this session - query logged as pending in the ledger.
- Atlas source
- true
- Evidence ID
- ev-uss-john-j-powers-de528-06