ReportInvestigative insert, Portland, re Columbia River dredging (file copy, page one)13 February 19801 page
reportLegibility: medium

Part 43, page 376

DB Cooper-17611Serials PD 164-41, SE 164-81, SE 164-81-5349

Document date 13 February 1980

Open in FBI Vault (Part 43, page 376 of the PDF)

FBI 164-81, Vault Part 43 p. 376 (DB Cooper-17611), Report, dated 13 Feb 1980, serial SE 164-81-5349 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-43/pages/376

Places

319 S.W. PineColumbia RiverOregonPortland, OregonVancouver, Washington

Dates mentioned

1974-08-06/1974-09-181974-08-19/1974-08-25February 10, 1980February 13, 1980November 24, 1971

Transcript

The scan is the source; the transcript is machine-generated from it.

SE 164-81 PD 164-41 SLH:pkg 1

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[guess: Suriz]. 6, [guess: 9], M

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The following investigation was conducted by SAs [REDACTED] on February 13, 1980:

AT PORTLAND, OREGON

[REDACTED] Waterways Maintenance Branch, Navigation Division, U.S. Army Engineer District, 319 S.W. Pine, telephone [REDACTED] was contacted regarding dredging operations on the Columbia River since November 24, 1971. The purpose of obtaining this information was to determine if it was possible that the bait money located on the beach property on the [REDACTED] Vancouver, Washington, on February 10, 1980, could have been placed there through dredging operations on the Columbia River.

[REDACTED] after a review of his records, advised that the only dredging operation between November 24, 1971, and the present in the vicinity of the [REDACTED] was during August 6 through September 18, 1974.

Material dredged from the river channel in the Columbia River was placed in several locations on or near the [REDACTED] as well as one location across the river on the Oregon side.

The dredge material deposited at the site where the money was located came from the north half of the ship channel, which is 300 feet wide, between river mile 96 plus 38 feet and river mile 97 plus 17 feet. This material was deposited on the beach area of the [REDACTED] between August 19 through the 25th, 1974, and consisted of 91,100 cubic yards of fill.

The channel is maintained at 40 feet in depth and all the material above 40 feet is dredged out. The dredge "Washington" of the General Construction Company did the dredging on this project. It had a 24 inch pipe with wiper bar inside the pipe. The wiper bar keeps large objects such as rocks from passing through the pipe. [REDACTED] [REDACTED] stated it would be possible for a 16x16x4 inch pack- age to get through the pipe; however, it is likely that a package that size or a human body or parts thereof would [cut off]

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DB Cooper-17611 Se 164-81-5349

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