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2022-06-22 22:59:33 +01:00
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<title>Cambridge Underground 1982: 115 sketch survey</title>
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2004-04-21 10:35:34 +01:00
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<center><font size=-1>Cambridge Underground 1982 p 9-10</font>
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<h2>115 provisional survey (1981)</h2></center>
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<p><img alt="A4 survey at 100 dpi - 20 k gif" width=800 height=565
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src="115.png">
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2004-04-29 16:24:54 +01:00
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<hr />
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<h2><a name="survey">The</a> Survey</h2>
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<p>Surveying was not the strong point of this year's expedition; it is hoped
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that we can do better next year. The entrance series of 115 to the head of
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the Ramp and 41 down to the pitch just above Junction Chamber were surveyed
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to BCRA grade 5 in 1980 and these surveys have been published in Proc. UBSS
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Vol. 16(1). 115 from the ramp to the bottom of the pitches and the connection
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were both surveyed to Grade 4 (the survey of the connection is reproduced
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here), making a closed traverse with the surface survey between the
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entrances. Unfortunately, though they closed vertically to within 2m, the
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plan closure was wildly out. It is thought that this might have been due to a
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sticky compass on the 1980 survey. The length of Pete's Purgatory was found
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to be 800m, but no other details were measured. Below this, the section of
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the streamway from the inlet to the 'twelve foot climb' (marked as c5) was
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surveyed to grade 3 and this is extrapolated downstream on the grade 1 survey
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to give a total depth of 680m plus or minus 40m. One point which the
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elevation does not bring out is the way that Stellerweg spirals round on
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itself with changes of direction at the big pitch and at Junction Chamber.
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The final direction of the streamway seems to be northwest - heading back
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into the mountain and away from the lake.
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<hr />
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<!-- LINKS -->
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<ul id="links">
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<li><a href="report.htm">Back to C.U. Report</a></li>
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<li>Cambridge Underground 1982
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<a href="http://cucc.survex.com/jnl/1982/index.htm">Table of Contents</a></li>
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<li>1981 Expedition info:
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<ul>
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<li><a href="log.htm">Logbook</a></li>
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<li><a href="bcracc.htm">BCRA Caves & Caving Report</a></li>
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</ul></li>
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<li><a href="../../pubs.htm#pubs1981">Index</a> to all publications</li>
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<li><a href="../../index.htm">Back to Expeditions intro page</a></li>
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2004-04-30 22:56:57 +01:00
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<li><a href="../../../index.htm">CUCC Home Page</a></li>
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</ul>
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