129 lines
2.9 KiB
Plaintext
129 lines
2.9 KiB
Plaintext
moving lhe mum-mg smps unul lhe wilEV level lsn
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both cork finals) IN u pmdsdy lhe Sim messumnenl
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marked on lhe stakes loam lhe lubes
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ln lhe lleld, une person walks pesl lhe other
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:lle‘mnlely. dnving a sub every I: m ls In all m 50
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[2(1) m gulde 31350: or mnehlne operators, and allow-
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mg len lhe else (at mll ol dnlns by allowing une (ark
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ball Io he in ml. or so lewer lhnn m: ulhee nl lne nrx|
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peg, moving me pole up at downhill m aduev: lhls,
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The flakes mustbe kepl v1mn| when mlasunng
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l cm in 5 m .s l-lllu x s equels l-soo (all, ample for
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enusl divnsiml drains In carry run-ell le dams Dead
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level llnes can else be mn M'mss landscape, end dam
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wells eheeked run level or m used lor mdsl a gemle
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use I mntly saw 1 I2 km dmn "owing gemly all lhe
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way "I sand at l mu. lu.d..n nul by a skilled surveyun
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uul by two wmnen hned lune week and ruined .n 30
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nnnules en a hose level.
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THE PLANE TABLE is a shudy lnpod wlueh (an
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huld a Ufihaptd puee ul plum tube on sham curked
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and dhbubbied as (or me hnse level, eseepl nus all
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“M be 5 velled iboul us 515)“ “I all dinaians mime
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5¢H0$MW5MHH5
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a-”
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m bull .v HM lulhlus
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clay Mae:
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z anal Adv: decks
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mun: 9.5
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uuwr HOSE lMl
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used mm mm. (aim-ll Ismlnifl) m mum mlnu: luu
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nuund . Ml
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9.7.3). many Iubmg, a bowl ul WIM on wind: films
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a pleee ol pslnled wmd wuh lwn mus ol qufl lehglh
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:5 ”nghfl‘ wllldeiglne 9.7,».
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Although Model a ls sufrlevelhng, u may be
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necessary R: up In an! nil‘ a 1m un Model A by way ol
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admsumnl
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Tn died a plane lable, sel up lwd marked slekes
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lwnh usdyrvislbln whlle mash“! lapel a lmle up h.ll
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[mm lne pelnl you will stand .l, dnvlng [he mus lo
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level using lhe \dbk
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Vlewlng lhe stakes lmm posmall a wl|h lhe plune
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leule, cheek "til lne level snows new level marks lb) lo
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be exactly .he same dlslnnee ldl bduw lhe slnke mp5
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unessuve lnisl One can lnen proceed lu level, lmm
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panda" B, anylnlng Ihal can be staked, Pinned, or
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nleleed uy anmher pensen (figure am
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This .s a vuy handy atmsvvaflev level ld see ln
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slphdns, or u) find mu when lhe oullel ul a dam will
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send walk! by We and gravity flow, or u: see u e hlll
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en wlueh you wenl I0 plnee a Ian): el 4. dlslnnee .s
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hlghenhnn ynnrslmwer heed .l home
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leeflmg need an|y be done onee if done right ll in
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ml doubt, buy a dumpy level or lhedddlne, and read
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lhe Inslrudmns, or ll wealthy and lnmlnyelem, hue .
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surveyor lwhnse mfl lab is mapping) Thousands ol
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mllrs a! dam: have been surveyed, and levels sel, by
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very simpk mls Plane cables 0! Venous deslens «I!
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used by survtyms, lml lhese usually lnelude a lelesmpe
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lee \nng ensrsnee walk
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Ralph Lung ul Ausmflia has dewsed a mum.
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.nnunled Ichrl whlch he has sueeessluly used lu eul
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mp
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FIEHIE
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we runs was
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Slmnn mlmmnum xluhtslcmsi villevsol film lnnu
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mums
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K‘MK‘_ 4
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B
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mull! u
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MEASURING run wcnmv or m: PLANE ml:
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run sums and M msmunancmcyuh Mel
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233
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