(sketches; elevation; cross-section; site) (4-26)
Set 4-3. TUNNEL RECONNAISSANCE REPORT
FRAME 4-63
Tunnel reconnaissance obtains essential information about underground galleries, or portions of roads or
railroads that have manmade covers, such a snow-sheds.
Underground or covered portions of roads or railroads are the subject of _______________________________
_______________________ .
(sketches) (4-90)
FRAME 4-91.
The profile sketch indicates the water level, and an elevation o the stream bottom and approaches.
The water level. stream bottom and approaches are sketched in the _________________________________ .
4-14
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