Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
-
[1]NavSource Online, Amphibious Photo Archive, USS LSM-497 [other_primary]
- Locator
- History bullets for USS LSM-497
- Finding type
- vessel_history
- Finding
- NavSource records this hull as laid down 17 March 1945 at Brown Shipbuilding Co., Houston, Texas; launched 7 April 1945; commissioned USS LSM-497 on 11 May 1945; assigned during World War II to the Asiatic-Pacific Theater, LSM Flotilla Sixteen, LSM Group Forty-Seven, LSM Division Ninety-Five; assigned to Far East occupation service from 8 November through 25 December 1945; decommissioned 16 September 1946 at Green Cove Springs, Florida; laid up in the Atlantic Reserve Fleet; struck from the Naval Register on an unknown date; sold in January 1958 to Western Contracting Corp., converted to a barge, and reported scrapped during the 1980s.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-02
- Study period
- 1945-1980s
- Limitations
- Ship-history and disposition record; it does not document asbestos content, an asbestos survey, abatement, individual exposure, causation, or legal eligibility. NavSource reports the struck date as unknown and gives the 1980s scrapping as final disposition.
- Atlas source
- true
- Evidence ID
- ev-uss-lsm-497-lsm497-01
-
[2]NavSource Online, USS LSM-497 specifications block [other_primary]
- Locator
- Specifications: complement and propulsion
- Finding type
- vessel_history
- Finding
- The USS LSM-497 specifications block lists a complement of 5 officers and 54 enlisted; two General Motors GM 16-278A reversible diesel engines with hydraulic clutches, direct drive, 1,440 BHP each at 720 rpm; ship's-service generators of two diesel-drive 100 kW 450 V AC units and one diesel-drive 20 kW 120 V DC unit; twin propellers; and 2,800 shp.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-02
- Study period
- 1945
- Population
- Ship's company: 5 officers and 54 enlisted
- Limitations
- Specification record only; it does not identify insulation products or prove asbestos aboard this hull. It does not establish individual exposure, quantity, condition, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-lsm-497-lsm497-02
-
[3]NavSource Online, Landing Ship Medium (LSM) / LSM(R) class index [other_primary]
- Locator
- LSM/LSM(R) class narrative and hull index entry for LSM-497
- Finding type
- historical_record
- Finding
- The LSM class index identifies LSM-497 within the World War II Landing Ship Medium series and describes the class as a group of 558 LSM and LSM(R) hulls built during World War II, most serving in the Asiatic-Pacific Theater.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-02
- Study period
- World War II
- Population
- World War II LSM/LSM(R) class
- Limitations
- Class-level background only; the index does not establish materials aboard LSM-497, asbestos content, quantity, location, condition, exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-lsm-497-lsm497-03
-
[4]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 [gao]
- Locator
- GAO product page: report description and highlights
- Finding type
- asbestos_application
- Finding
- The GAO product page describes a review of asbestos use in Navy ships and Navy policies for removing and replacing damaged insulation or insulation removed during repairs.
- Verification
- partial
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-02
- Study period
- 1979-1980 review period
- Population
- U.S. Navy ships and Navy maintenance policy
- Limitations
- Navy-wide/program-level context, not a record for LSM-497. The full report was not retrieved in this session; the live GAO product page does not establish that asbestos was installed aboard this hull, where it was located, in what quantity, or what remains.
- Atlas source
- true
- Evidence ID
- ev-uss-lsm-497-lsm497-04
-
[5]NIOSH Health Hazard Evaluation Report HETA 85-021-1654, Portsmouth Naval Shipyard [other_primary]
- Locator
- PDF pp. 4-5, Background: asbestos-insulation storage and shipboard rip-outs/pipe covering
- Finding type
- environmental_record
- Finding
- NIOSH documents that a Portsmouth Naval Shipyard insulation shop had prepared and stored asbestos insulation and that insulators performed rip-outs and pipe-covering work aboard Navy ships and submarines.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-02
- Study period
- 1985 evaluation; prior shipyard work history
- Population
- Portsmouth Naval Shipyard insulation workers and Navy ships/submarines
- Limitations
- Different shipyard and later period; the report does not identify LSM-497, Brown Shipbuilding, or any material aboard this hull. It does not establish individual exposure, quantity, condition, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-lsm-497-lsm497-05
-
[6]Accessible-source research sweep and negative finding [other_primary]
- Locator
- Search ledger rows sl-uss-lsm-497-lsm497-01 through -10
- Finding type
- asbestos_application
- Finding
- No ship-specific asbestos survey, abatement contract, hazmat disclosure, material inventory, or other primary asbestos record for USS LSM-497/LSM-497 was located in the accessible sources reviewed. Ship-specific asbestos documentation is unknown, not established absent.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-02
- Limitations
- Negative finding is limited to accessible public sources reviewed. Firecrawl search was unavailable because the keyless service reported a multi-hour quota wait; the authenticated CourtListener helper was stopped when the fleet pacing limiter remained saturated before an HTTP request issued; underlying Navy technical files and non-digitized archival holdings were not reviewed. This does not prove absence of asbestos or defeat any exposure claim.
- Atlas source
- true
- Evidence ID
- ev-uss-lsm-497-lsm497-06