Early Twentieth Century (Temporal Keyword)

26-31 (31 Records)

Sample of processed Kongsberg Sector Scan Sonar Image Exports (2011-2020 field deployments) (2020)
IMAGE Joseph Grinnan. Jeffrey M. Enright. Mason Miller.

Representative sample of exported Kongsberg Mesotech Ltd. model 1171 sector-scan sonar sweep images around the 41OR90 wreck collected during multiple field deployments between 2011 and 2020. File names include deployment year. Where they're included, references to "pre" or "post" refer to if the scan was taken before a construction action or after.

Side-Scan Sonar Mosaics of Site 41OR90 Files from multiple field deployments (2013-2020) (2020)
IMAGE Joseph Grinnan. Jeffrey M. Enright. Mason Miller.

Side-scan sonar mosaic files from investigations at Site 41OR90 collected using an Edgetech 4125 CHIRP system during multiple field deployments between 2012 and 2020.

T-Down Snowberry Burn (1983)
DOCUMENT Citation Only Lloyd McNeil.

This resource is a citation record only, the Center for Digital Antiquity does not have a copy of this document. The information in this record has been migrated into tDAR from the National Archaeological Database Reports Module (NADB-R) and updated. Most NADB-R records consist of a document citation and other metadata but do not have the documents themselves uploaded. If you have a digital copy of the document and would like to have it curated in tDAR, please contact us at comments@tdar.org.

Teledyne BlueView Multibeam Scanning Sonar Processed Data Export Representative Images (2020)
IMAGE Bryan Herling. Mason Miller.

A collection of 18 exported images from the processed BlueView sonar dataset collected around Site 41OR90 in January of 2020.

VAFB-2019-21: DRAFT Point Conception Light Station Conditions Assessment and Repairs Study, Contract No. GS10F0059N, Task Order FA8903-15-F-0023 (PWS Task 4.12.3) (2019)
DOCUMENT Full-Text Jeremy Hollins. Dennis Pearson. Shannon Wright. Richard Bambam. Scott McCrady. Mark Taberner.

This document is a study intended to serve as a preliminary analysis of the current conditions and possible repairs for the Point Conception Lighthouse and Family Quarters C. The field investigations consisted of visual surface observations, avoided destructive analysis, and did not include the preparation of structural calculations, structural or material testing, or development of design or construction drawings. This report and cost estimates are intended to provide the USAF with a rough...

Wayne N, Aspinwall Federal Building, U.S. Courthouse, Grand Junction, Colorado: Final Report of the Conservator (1980)
DOCUMENT Citation Only Anonymous.

This resource is a citation record only, the Center for Digital Antiquity does not have a copy of this document. The information in this record has been migrated into tDAR from the National Archaeological Database Reports Module (NADB-R) and updated. Most NADB-R records consist of a document citation and other metadata but do not have the documents themselves uploaded. If you have a digital copy of the document and would like to have it curated in tDAR, please contact us at comments@tdar.org.