Jenner Bombing Target Archive Search Report Findings

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Section 4 – History Page 30 ARCHIVES SEARCH REPORT – FINDINGS Jenner 12th Naval District Target No. 29 Jenner, CA the edge of the coastline, as opposed to 3 mile ones around the two other targets associated with NAAS Santa Rosa (i.e. Petaluma and Stewart’s Point). Ostensibly, the size of the DA is a function of types of munitions used. The Jenner DA is on the edge of another DA that extends about 85 miles into the Pacific Ocean at Jenner. Typical Target Installations (P.W. Drawing 1219) 22 August 1944, revised 16 March 1945 Appendix K-3 20 This Naval Air Station Alameda drawing lays out the typical designs for five types of targets: Land Dive Bombing, Rocket Firing Range, Water Borne Dive Bombing, Skip Bombing and Detached Cruiser. The Navy constructed only a dive bombing target at Jenner. The plan for the Land Dive Bombing Target called for a 250-foot clearing in all directions from the target with a 100-foot diameter, 4-foot wide ringed boardwalk circling a 12-foot square platform target center. Rake stations were to be placed in line and perpendicular to the line of attack, each a thousand feet from the target center. Dive Bombing Target Location Jenner, Vicinity of NAAS Santa Rosa B.T. No. 29 (P.W. Dwg. 2464) 15 May 1945, revised 27 February 1947 Appendix K-4 21 Although given a different Public Works Drawing number, this drawing is essentially the same as the 1944 one discussed above. The real estate information is removed and the location of the Dive Bombing Target added. Depicted is a single circular target with coordinates listed as N38 o 26', W123 o 07', which is accurate to the minute of the location. The target lies +660 feet south of the State Park Road #2681 near a rock outcropping. A second rock outcropping to the south is also denoted. Map of Auxiliary Air Station Santa Rosa Showing Conditions On June 30 1947 30 June 1947 Appendix K-5 22 This map shows the layout of NAAS Santa Rosa. The magazine area includes: Inert Storehouse, Pyrotechnics Magazine, Small Arms Magazine, Fuze and Detonator Magazine and 3 High Explosive Magazines. The station also had a “Machine Gun Range”, which given its attachment to the runway, appears to be an airplane firing-in butt. 4.4.2 Air Photo Interpretation Government and contractor personnel conducted an aerial photography database search, included in section 4.2). The aerial photography retrieved covered Jenner 12th Naval District Target No. 29 prior to, during and following military use. The imagery acquired
Section 4 – History Page 31 ARCHIVES SEARCH REPORT – FINDINGS Jenner 12th Naval District Target No. 29 Jenner, CA is in photographic print format. The analyst performed the interpretation using the following source materials: PHOTO DATE APPROX. SCALE 12 January 1942 1:26,000 23 September 1945 1:11,200 6 October 1947 1:20,000 10 June 1961 1:20,000 11 September 1998 1:40,000 The analyst delineated imagery containing important areas on hard copy plots and digitized it using Computer-Aided Drafting and Design (CADD) software. The digitized features overlay scanned aerial photography, resulting in the final plots (see Plate 3). The analysis involved using stereo viewing of photography, which allows more accurate identifications than monoscopic interpretations. The resolution and scale of the imagery limited the identification of features discussed in this study. The analyst used the word “probable” when discussing features for which identification is reasonably accurate. The analyst used the term “possible” when identification was not positive, but the object/area matched known features/locations on other sources. Analysis of the aerial photographs referenced the site maps discussed in sections 4.4.1 above. The boldfaced numbers in parentheses referenced in the sub-paragraphs below refer to the feature descriptions on the annotated aerial photography plates. The sub-paragraphs below describe the relevant features identified on the imagery: 4.4.2.1 1942 Imagery The 1942 imagery shows the site south of the Russian River nearly three years prior to the Navy’s acquisition. A 10-acre plot of land is being cultivated on the site with farm buildings just to the south along Highway 1. Further to the south, additional plots are being cultivated. 4.4.2.2 1945 Imagery (Plate 3) The 1945 imagery shows the condition of the site during Navy use and is at an excellent scale. The target is clearly visible as a 100 foot diameter white ring (A) about 750 feet east of the coastline and less than 200 feet southeast of a series of rock outcrops that are approximately 900 feet across (B). The target center is about 25 feet across. There are lots of single rock outcrops that rise above the surrounding field. There are no distinct rake stations present a thousand feet out as was the typical design. The target lies at the approximate center of three hills or rock outcrops between 800 and 1,250 feet away (C, D & E). This configuration closely matches the 1947 site plan. A trail leads to the target from “State Park Road 26181” (F). The 10 acre cultivated plot (G) remains clearly
Page 1 and 2: Defense Environmental Restoration P
Page 3 and 4: Table of Contents ii ARCHIVES SEARC
Page 5 and 6: 1 INTRODUCTION 1.1 AUTHORITY Sectio
Page 7 and 8: 2 PREVIOUS SITE INVESTIGATIONS 2.1
Page 9 and 10: Month Section 3 - Site Description
Page 11 and 12: Section 3 - Site Description Page 7
Page 17 and 18: 3.6.6 Typical Cross Sections of the
Page 19 and 20: Section 4 - History Page 15 ARCHIVE
Page 23 and 24: Entry 253, Index to Central Corresp
Page 29 and 30: 4.2.11 U.S. Army Corps of Engineers
Page 33: 4.3 SUMMARY OF INTERVIEWS Section 4
Page 37 and 38: 5 REAL ESTATE 5.1 CONFIRMED DOD OWN
Page 39 and 40: Section 6 - Site Inspection Page 35
Page 41 and 42: 8 TECHNICAL DATA OF ORDNANCE AND EX
Page 43 and 44: APPENDIX A REFERENCES Appendix A Re
Page 45 and 46: Appendix A References A-2 ARCHIVES
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Page 55 and 56: USATHMA U.S. Army Toxic and Hazardo
Page 57 and 58: TEXT / MANUALS Appendix C - Text /
Page 59 and 60: BOMB, PRACTICE, 100-LBS, Mk 15 Mod
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Appendix D - Reports / Studies Page
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APPENDIX E Appendix E - Letters / M
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Appendix E - Letters / Memorandums
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APPENDIX E-2 Appendix E - Letters /
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APPENDIX F Appendix F - Real Estate
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APPENDIX H Appendix H - Interviews/
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Appendix H - Interviews/Points of C
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TABLE OF CONTENTS Appendix I - Pres
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Photo #3 Jenner 12th Naval District
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APPENDIX K Appendix K- Historical M
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ARCHIVES SEARCH REPORT - FINDINGS J
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SITE SAFETY AND HEALTH PLAN (SSHP)
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19. Other (specify) ARCHIVES SEARCH
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SITE SURVEY SAFETY BRIEFING (Check
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APPENDIX M Appendix M - Report Dist
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PLATES Plates ARCHIVES SEARCH REPOR
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Plates Page 2 - Plates ARCHIVES SEA
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pn Branch iusslan Gulch Crab - JENN
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Jenner Bombing Target Archive Search Report Findings

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