Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet ix-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-dahlgren-dd187-pkt-ix-packet-md
-
[2]DANFS, Dahlgren II (Destroyer No. 187), NHHC ship-history entry updated by Robert J. Cressman 22 April 2024 (live page serves 404; canonical text read via Wayback capture 2025-12-09) [nhhc_danfs]
- Locator
- NHHC DANFS 'Dahlgren II (Destroyer No. 187)' entry - spec block + full service narrative; Wayback capture 2025-12-09
- Finding type
- vessel_history
- Finding
- DANFS record for this hull: 'The second U.S. Navy ship named for Rear Adm. John Adolphus Dahlgren (1809-1870)' (spec block: Destroyer No. 187: displacement 1,190; length 314'5"; beam 31'9"; draft 9'4"; speed 35.0 knots; complement 101; armament 4 4-inch, 3 3-inch, 12 21-inch torpedo tubes; class Clemson). Laid down 8 June 1918 at Newport News, Va., by Newport News Shipbuilding & Dry Dock Co.; launched 20 November 1918, nine days after the Armistice; sponsored by Mrs. Josiah [Ulrika Dahlgren] Pierce, daughter of Rear Adm. Dahlgren; commissioned 6 January 1920, Cmdr. Leo Sahm; redesignated DD-187 on 17 July 1920. Atlantic Fleet exercises; Presidential Fleet Review at Norfolk April 1921; aerial bombing tests on former German warships off the Virginia coast summer 1921; out of commission at Philadelphia 30 June 1922. Recommissioned 25 October 1932, Lt. Cmdr. Harry W. Van Hasseln; Norfolk to San Diego 7-30 November 1932; west coast ops to April 1934; Atlantic fleet exercises; San Diego January 1935; sailed east 1 July 1937, rescued a U.S. Coast Guard seaplane crew in passage, arrived New York 21 July 1937; engineering experiments until 14 June 1940. Patrols Norfolk/Newport; submarine escort; Patuxent River ordnance and submarine-detection experiments January-1 April 1941; variable-pitch propeller tests summer 1941; escorted a new cruiser on trials. Key West 4 January 1942 escorting battleship Washington (BB-56); New York coastal patrol February 1942; Key West 24 March 1942 for Fleet Sonar School and patrols; rescued 57 survivors of tanker Pennsylvania Sun 15 July 1942 (torpedoed by U-571); rescued nine survivors of blimp K-74 on 19 July 1943 (the ZP-21 airship - per DANFS 'the only airship lost to enemy action in WW II' - had been shot down in an attack on U-134). Charleston, S.C. 11 January 1945 for submarine-training operations; reclassified 'miscellaneous auxiliary' AG-91 on 1 March 1945; served Mine Warfare Test Station, Solomons Island, Md., until 16 November 1945; moored Philadelphia Naval Shipyard; decommissioned 14 December 1945; stricken from the List of Naval Vessels 8 January 1946; sold for scrap 17 June 1946.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1918-1946
- Population
- Newport News Shipbuilding construction trades 1918-1920; crews 1920-1922 and 1932-1945 (design complement 101)
- Limitations
- DANFS documents namesake, construction, machinery-era service chronology, reclassification, striking, and sale - not materials or asbestos content. The older hazegray DANFS transcription differs on four points (recommissioned '26 October', return 'January 1936', '67 survivors'/'16 July' 1942, spec block cpl 111/dp 1,060/36 kt); the current NHHC text is carried in each case and the variants are logged in gaps. Mirror citation because the live NHHC page returns 404.
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-01
-
[3]Bureau of Ships, Ships' Data, U.S. Naval Vessels, 1938 edition (Navy Department; Google-digitized scan via shipscribe.com), destroyer tables pp. 48-52, entry for DAHLGREN DD-187 [other_primary]
- Locator
- SDB 1938 destroyer tables: p. 48 (dimensions), p. 49 (trial/service data), p. 50 (machinery), p. 51 (armament/quarters), p. 52 (builder/contract); Google scan via https://www.shipscribe.com/pubs/SDB1938.pdf
- Finding type
- gov_survey
- Finding
- Official Navy Department data book entry for this hull: length over all 314'4", waterline 311'0", extreme beam 30'8", mean draft 9'3", standard displacement 1,190 tons (p. 48); trial displacement 1,310 tons, designed speed 35.0 knots, four smoke pipes, two masts (p. 49); machinery - two propellers, 'Westgh. geared turb' (Westinghouse geared turbines), boilers (oil burning) number 4, type 'W. F.' (White-Forster), turbo-generator sets 2, Turbo, D.C. (p. 50); armament 4 4-inch/50 cal., 1 3-inch/23 cal. A.A., 4 21-inch triple torpedo tubes; quarters available - wardroom officers 9, chief petty officers 8, other enlisted men 113 (p. 51); build line - Newport News S.B. Co., 'Cost+fee' contract under the act of October 6, 1917, contract signed February 14, 1918, keel laid June 8, 1918 (p. 52).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1938 edition; data reflects the in-commission destroyer
- Population
- Construction trades 1918-1920; crew complement context (berthing for ~130) for the interwar period
- Limitations
- Official contemporaneous characteristics table - documents machinery type/count, dimensions, armament, and berthing for this hull as of the 1938 edition; contains no materials or asbestos information (asbestos content of the four White-Forster boilers' insulation is class/era inference, not stated). Table still lists four boilers and four smoke pipes notwithstanding the 1937 experimental-boiler installation - whether the experimental pair replaced two of the four or how the table was compiled is unresolved (logged in gaps).
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-02
-
[4]NHHC Online Library of Selected Images, photo NH 45525 caption ('USS Dahlgren (DD-187) Off the Charleston Navy Yard, South Carolina on 28 February 1945 ... fitted when this ship was given two experimental ultra-high-pressure (1,300 psi) boilers in 1937') + NH 64536/64537/64538 captions via NavSource DD-187 photo index (Philadelphia Navy Yard drydock 23 May 1932; departing the yard 4 August 1932) [other_primary]
- Locator
- ibiblio HyperWar mirror of NHHC Online Library, NH 45525 picture-data page; NavSource navsource.org/archives/05/187.htm photo caption rows for NH 64536/64537/64538 (via Wayback capture 2024-05-24)
- Finding type
- historical_record
- Finding
- Official NHHC photo captions document two ship-specific engineering/yard events aboard this hull: (1) the 1937 installation of 'two experimental ultra-high-pressure (1,300 psi) boilers' - with the fat after smokestack retained thereafter - during her 1937-1940 engineering-experiment assignment (the kind of major boiler-room work that disturbs or installs thermal insulation); (2) drydocking in the Philadelphia Navy Yard on 23 May 1932 (NH 64536, NH 64537) and departure 4 August 1932 (NH 64538) during reactivation before her 25 October 1932 recommissioning, and presence off the Charleston Navy Yard on 28 February 1945, the day before AG-91 redesignation.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1932 (reactivation drydock); 1937-1940 (experimental plant); 1945 (Charleston)
- Population
- Yard trades at the 1932 Philadelphia Navy Yard drydock/reactivation and the 1937 boiler installation; engineering-experiment ship's force 1937-1940
- Limitations
- Captions document events and configuration, not materials: neither caption mentions asbestos, and neither identifies the yard that installed the 1937 boilers (ship was at New York from 21 July 1937 per DANFS - facility unnamed; logged in gaps). NH 64536-64538 captions are transcribed on the NavSource DD-187 index page (NHHC online-library page for the hull's photo set not located).
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-03
-
[5]NARA Special List 44 named-vessel logbook inventory + NARA Ship Plan Index (RG 19) entries for DAHLGREN DD-187 [other_primary]
- Locator
- archives.gov SL44 'Dahlgren (DD-187)' rows (two date spans); archives.gov/research/cartographic/ship-index 'DAHLGREN DD-187' rows (NAID 53483990; NAID 175668831)
- Finding type
- historical_record
- Finding
- Two NARA holdings name this hull: (1) Special List 44 lists 'Dahlgren (DD-187)' deck logs covering 1/6/1920-6/30/1922 (first commission) and 4/11/1932-12/14/1945 (reactivation through decommissioning); (2) the RG 19 Ship Plan Index lists DAHLGREN DD-187 under Alphabetical Ship Drawings (NAID 53483990) and Microfilm (NAID 175668831) - hull plan sets that record machinery arrangement and lagging notation typical of Bureau of Engineering/Ships drawing books.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1920-1922; 1932-1945 (logbook coverage)
- Limitations
- Archival leads only - holdings are undigitized/unpulled in this effort; deck logs would not normally state insulation materials and the drawing sets' content is unexamined. Nothing asserted from them beyond existence and coverage windows.
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-04
-
[6]Bureau of Ships, Ships' Data 1938 machinery table (this hull's row: 4 White-Forster boilers, Westinghouse geared turbines) + Atlas shipyards.json record newport-news-shipbuilding (tier 1; documented products incl. Kaylo, Unibestos, Johns-Manville, raw asbestos) [other_primary]
- Locator
- SDB 1938 p. 50 DD-187 machinery row; shipyards.json yard_id newport-news-shipbuilding; NavSource/HyperWar Clemson-class spec blocks
- Finding type
- asbestos_application
- Finding
- Era/design inference: this hull is a 1918-1920 Clemson-class flush-deck destroyer with a four-boiler oil-fired steam plant (4 White-Forster boilers, Westinghouse geared turbines, 2 shafts per Ships' Data 1938; class design ~26,500-27,000 shp, 35 kt per NavSource/HyperWar class data). Steam plants of this era carried asbestos in boiler and machinery insulation, steam-line lagging, valve and flange gaskets, machinery packing, and electrical insulation; builder Newport News Shipbuilding is documented at yard level in the Atlas dataset (tier 1) with asbestos products including Kaylo pipe/boiler insulation, Unibestos, Johns-Manville products, and raw asbestos mud.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-27
- Study period
- 1918-1945
- Population
- Newport News Shipbuilding construction trades 1918-1920; crew/engine-room personnel 1920-1945
- Limitations
- Class/era and builder-yard inference only - no ship-specific asbestos record supports 'documented aboard this hull' wording; establishes no quantities, no locations, and no individual exposure. Newport News yard product documentation derives from later-era exposure claims and does not speak to 1918-20 construction. NARA RG 19 plan sets (ev-04) are the lead for any hull-level material specification.
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-05
-
[7]In re Brooklyn Navy Yard Asbestos Litigation, 971 F.2d 831 (2d Cir. 1992) + Atlas shipyards.json records for philadelphia-naval-shipyard, charleston-naval-shipyard, newport-news-shipbuilding, brooklyn-navy-yard [court_record]
- Locator
- 971 F.2d 831 (2d Cir. 1992); shipyards.json yard_ids newport-news-shipbuilding / philadelphia-naval-shipyard / charleston-naval-shipyard / brooklyn-navy-yard
- Finding type
- litigation_documented
- Finding
- Yard-level context for the Navy/commercial yards tied to this hull: builder Newport News Shipbuilding is a tier-1 yard in the Atlas dataset (documented products: Kaylo pipe/boiler insulation, Unibestos, Johns-Manville products, raw asbestos; 4-fold mesothelioma incidence among WWII-era Tidewater shipbuilders). Philadelphia Naval Shipyard (documented drydock 23 May 1932; both decommissionings, 1922 and 1945), Charleston Naval Shipyard (documented presence February 1945; tier 2, product list incl. pipe insulation 5-50% asbestos and boiler coatings 15% asbestos), and New York Naval Shipyard/Brooklyn (arrival port for the 1937-1940 engineering-experiment assignment; tier 3, Kaylo use established in In re Brooklyn Navy Yard Asbestos Litigation, 971 F.2d 831).
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-27
- Study period
- 1918-1945 (yard events); litigation/yard documentation later
- Population
- Newport News trades 1918-20; Philadelphia Navy Yard trades 1922/1932/1945; Charleston Navy Yard trades Feb-Mar 1945; NY Navy Yard trades 1937-1940 (if installation occurred there - unverified)
- Limitations
- Yard-level records only - they document conditions/litigation at yards this hull built at, was drydocked/inactivated at, or operated from; no element is evidence of asbestos aboard DD-187. Attribution of the 1937 boiler installation to any specific yard (including New York Naval Shipyard) is unverified - logged in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-06
-
[8]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) - program-level context per BATCH-01 standing note [gao]
- Locator
- GAO HRD-80-2 (Oct 1979); BATCH-01 standing note
- Finding type
- regulatory
- Finding
- GAO documented that the Navy's standing asbestos-removal policy dates from 1975 (remove asbestos insulation only when damaged or required for repairs, modified 1979 toward selective replacement in high-maintenance areas). This hull was sold for scrap 17 June 1946 - nearly three decades before any standing Navy asbestos-control program and before disposal hazmat documentation practices - so the hull is consistent with era materials retained in place through its entire service life and sale; no U.S.-custody abatement or disposal material record is expected to exist.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-27
- Study period
- 1975-1979 policy era vs. 1918-1946 U.S. custody of this hull
- Limitations
- Program-level context only - GAO HRD-80-2 does not name this hull or class; it bounds what documentation could exist, it does not establish that asbestos was or was not aboard. gao.gov returns 403 to automated fetches; product-page description relied on per BATCH-01 standing note.
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-07
-
[9]CourtListener API v4 opinion and docket sweeps for 'USS Dahlgren' / 'Dahlgren asbestos' / 'DD-187' / 'AG-91' (authenticated, cl-auth-search.py) [court_record]
- Locator
- CourtListener type=o result sets ('USS Dahlgren' 8 collisions incl. /opinion/431832/, /opinion/8929616/, /opinion/499753/, /opinion/474852/, /opinion/8953085/, /opinion/1613524/, /opinion/8664854/, /opinion/8666773/; 'DD-187' 0; 'AG-91' 7 artifacts; 'Dahlgren asbestos' 25 surname/expert collisions, 20 classified); type=r ('USS Dahlgren' 3 collisions; 'Dahlgren asbestos' 98 surname/bankruptcy collisions)
- Finding type
- litigation_documented
- Finding
- CourtListener sweeps - no qualifying vessel litigation located. Opinion index: '"USS Dahlgren"' = 8 hits, all name collisions on USS Dahlgren (DDG-43, ex-DLG-12, in service 1961-1992) - the Ta Chi Navigation (Panama) Corp. / SS Eurybates collision litigation (E.D. La. 1981 limitation origin; 5th Cir. opinions 1984, 1986, 1988) and United States v. Connor (NMCR 1984, CMA 1989 - court martial of a DDG-43 crew member); '"DD-187"' = 0 hits; '"AG-91"' = 7 hits, all citation/docket-number artifacts (attorney-general opinion numbers, unrelated case numbers) in non-vessel litigation - non-qualifying. Docket index: '"USS Dahlgren"' type=r = 3 hits, all collisions on administrative cases whose docket text contains the name string (Kelly v. Hegseth, D.D.C. 1:26-cv-00081 and D.C. Cir. 26-5070; State of Washington v. U.S. Dep't of State, W.D. Wash. 2:20-cv-00111) - these references cannot concern DD-187 (scrapped 1946) and match either the DDG-43 hull or the Dahlgren naval facility; no asbestos context, non-qualifying; 'Dahlgren asbestos' type=r = 98 hits, all person-surname collisions (Dahlgren v. Owens-Illinois D. Mass. 1983 x2, Dahlgren v. Foster Wheeler / Armstrong / Seatrain / U.S. Steel / A-C Product Liability Trust - plaintiffs surnamed Dahlgren) plus bankruptcy mass-dockets (Asbestos Corp. Ltd., Bestwall) - none name the vessel. 'Dahlgren asbestos' type=o = 25 hits; the 20 first-page results are all non-vessel litigation in which 'Dahlgren' appears only inside opinion text (asbestos/personal-injury cases incl. DeLisle v. Crane, Estes v. Eaton, Phipps v. Copeland, Lockheed Martin v. Superior Court, Faust v. BNSF, Chavez v. OWCP, Todd Shipyards v. Director OWCP - party-name and expert-witness surname collisions; none names USS Dahlgren or any Navy hull).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- sweep run 2026-09-27
- Limitations
- Opinion-index coverage complete for the exact name and both hull numbers; docket coverage complete for the exact name and surname+asbestos; surname+asbestos opinion coverage complete for the classified first page. The 'Dahlgren asbestos' opinion sweep returned 25 hits of which the first-page 20 were classified (all non-vessel surname/expert-witness collisions); the 5 second-page results were unretrieved at close (fleet pacing) - a residual classification gap logged rather than assumed. An asbestos opinion about this hull would in ordinary citation practice also match '"DD-187"' (0 hits) or '"USS Dahlgren"' (8 collisions, all classified) - the core queries exclude qualifying vessel litigation absent an informal bare-'Dahlgren' vessel reference in the 5 unclassified page-2 results. A negative sweep does not exclude unindexed dockets, unreported settlements, or state-court matters outside RECAP. Two later USS Dahlgrens exist (DLG-12/DDG-43) and a naval base shares the name - hull attribution is required for any future hit.
- Atlas source
- true
- Evidence ID
- ev-uss-dahlgren-dd187-08
-
[10]Batch-3191 search ledger (this record): NHHC DANFS (Wayback-verified), hazegray DANFS transcription (Wayback), BuShips Ships' Data 1938, NHHC photo captions, NavSource DD-187 index, NARA Special List 44, NARA RG 19 Ship Plan Index, CourtListener sweeps, marketing-list sweep [other_primary]
- Locator
- search_ledger rows sl-uss-dahlgren-dd187-01 through sl-uss-dahlgren-dd187-14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located for DD-187/AG-91: no asbestos survey, abatement contract, disposal hazmat disclosure, or docketed asbestos case naming the vessel was found in the public sources searched (see search_ledger). The hull was sold for scrap 17 June 1946 - before the Navy's documented asbestos-control program era (GAO HRD-80-2: standing removal policy dates from 1975) and before disposal hazmat documentation practices - so no U.S.-custody abatement or disposal-phase material record is expected to exist.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 2026-09-27
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1918-20 steam-plant hull is consistent with retained era materials through its service life and 1946 scrapping. 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-dahlgren-dd187-09