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| Tunnel east of 3a ... Laura Gawlinski ... northwest Rotate 180 ... 2 Aug 2018 ... Tunnel east of 3a. |
| Tunnel east of 3a ... Laura Gawlinski ... northwest Rotate 180 ... 2 Aug 2018 ... Tunnel east of 3a. |
| Tunnel east of 3a ... Laura Gawlinski ... southeast Rotate 270 CW ... 3 Aug 2018 ... Tunnel east of 3a. |
| Tunnel east of 3a ... Laura Gawlinski ... northwest 3506 Horizontal (normal) ... 2 Aug 2018 ... Tunnel east of 3a. |
| Tunnel east of 3a, southeast end ... Laura Gawlinski ... southeast Rotate 180 ... 2 Aug 2018 ... Tunnel east of 3a, southeast end. |
| Tunnel east of 3a, southeast end ... Laura Gawlinski ... northwest 3500 Horizontal (normal) ... 2 Aug 2018 ... Tunnel east of 3a, southeast end. |
| Tunnel east of 3a, northwest end ... Laura Gawlinski ... west 3506 Horizontal (normal) ... 2 Aug 2018 ... Tunnel east of 3a, northwest end. |
| Drain A cleared, looking down (east) from tunnel ... AMS Horizontal (normal) ... Drain A cleared, looking down (east) from tunnel. |
| Tunnel east of 3a, edge of tunnel before enlarging at southeast end ... Laura Gawlinski ... northwest ... 2 Aug 2018 ... Tunnel east of 3a, edge of tunnel before enlarging at southeast end. |
| Tunnel east of 3a, southeast end, tile supports ... Laura Gawlinski ... east Rotate 270 CW ... 2 Aug 2018 ... Tunnel east of 3a, southeast end, tile supports. |
| Late Roman Wall, east face, before tunnel ... AMS Horizontal (normal) ... Late Roman Wall, east face, before tunnel. |
| Northern line of tunnel east of 3a ... Laura Gawlinski ... northwest ... 2 Aug 2018 ... Northern line of tunnel east of 3a. |
| Northern line of tunnel east of 3a ... Laura Gawlinski ... northwest ... 2 Aug 2018 ... Northern line of tunnel east of 3a. |
| Northern line of tunnel east of 3a ... Laura Gawlinski ... northwest 3504 Horizontal (normal) ... 2 Aug 2018 ... Northern line of tunnel east of 3a. |
| Full extent of tunnel east of 3a ... Laura Gawlinski ... southeast Horizontal (normal) ... 3 Aug 2018 ... Full extent of tunnel east of 3a. |
| Tunnel east of 3a, southeast end, after cleaning ... Laura Gawlinski ... southeast Rotate 90 CW ... 2 Aug 2018 ... Tunnel east of 3a, southeast end, after cleaning. |
| Tunnel east of 3a, southeast end, collapsed structure ... Laura Gawlinski ... southwest Rotate 180 ... 2 Aug 2018 ... Tunnel east of 3a, southeast end, collapsed structure. |
| Tunnel east of 3a, southeast end, after cleaning ... Laura Gawlinski ... southeast Rotate 270 CW ... 2 Aug 2018 ... Tunnel east of 3a, southeast end, after cleaning. |
| Tunnel east of 3a, from rock cut shaft ... Laura Gawlinski ... northwest Rotate 180 ... 2 Aug 2018 ... Tunnel east of 3a, from rock cut shaft. |
| Ω, end of season, tunnel east of 3a ... Craig Mauzy ... Same as color 2018.09.0216. northwest Horizontal (normal) ... 7 Aug 2018 ... Ω, end of season, tunnel east of 3a. |
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