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<br />Point. .
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<br />g~rg~~~: ::::::: ::::::::::::::::::::: ::-:::::::::::
<br />Eightmile Creek..........., 0..',..,.,. 0' _......0 _...
<br />Hardscrabble Creek. _ _ ...... ............... ...;." ...
<br />Deaver Creek......40..... ...... ......... ........ __..
<br />Red Creek. ..... ................ ...; ........ .........
<br />Pecks Creek. ..._........_...............,............
<br />Union Avenue Bridge, Pueblo.. ..... ........... .....
<br />
<br />St. Charles River..a.......... ................ .... ...
<br />Huerfano RiYer... ......... .... .......... ........ ...
<br />Apishapa Rl'rer.. .............. ....... ....... ....._.
<br />Brldgonorth of Rocky Ford.......... ...............
<br />La Junta. .............. ......u.......... ;.. ........
<br />Adobe Creek.. ....... .....,.,.. 0...,.,....,. 0....,. 0
<br />Purgatoire River... .......... h.. ..~............. .~.
<br />Caddoa.............~... .............. .,... ...... ~....
<br />Lamar...................._........... ,...... ........
<br />Bl~ Sandy Creek.. .........,.......,. .".. ...0., '... 0'
<br />Bndge north or Granada................... ...........
<br />COlorado-Kansasllne.............:....... ......: ....
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<br />-----
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<br /> Distance. Descent bctw
<br />Jt':leva- points.
<br />tlon -
<br />11boye From
<br />a level. Canon Point to Total. Perm
<br /> City, point.
<br />, "Feet. Mila. jfila. Fer/. F,
<br />5,320 . ~..._.... .-.-.-.... .......750 ......
<br />5,245 3,0 3.0
<br />5,125- 9,8 6,8 120
<br />5,020 14,5 407 105
<br />4,970 18,0 3,5 50
<br />4,900 23,2 5,2 70
<br />4775 32.0 8,8 125
<br />4;670 43.0 11,0 105
<br />4,560 51,8 8,8 110
<br />4,430 6701 1.\.3 130
<br />4,28) 89.8 22.7 150
<br />4,100 104,8 1.\.0 130
<br />.4,050 117,6 1208 100
<br />3,930 133.1 1.\,.\ 120
<br />3,850 142,5 9,4 80
<br />3,760 1.\6,3 13.8 90
<br />3,600 176,3 20,0 160
<br />3550 18,\,0 8.7 50
<br />3;4&1 194,8 908 70
<br />3,3.?O 211,4 1606 130
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<br />CA USE OF FLOOD.
<br />
<br />The cause of the flood was a series of cloud-bursts r, resulting from
<br />he~vy rain-bearing clouds striking against the mountains and being
<br />deflected upward.
<br />The daily weather maps for the first week in June show that an
<br />area of high pressure (e~ceeding .30.5 .inches) appeared over the
<br />
<br />I The" phenomena. called- H cloud.bursts'" are 'Very intense rainfalls ot short duration
<br />"OT'er small areas that are sharply defined.. ' "Cloud-bursts are common along the eastl!rn
<br />slope of the Rocky Mountain8 wherever cany(ms have cut deeply into the mountain
<br />mass{'s. Each of these canyons acts like a "chJlmney flue in creating a strong upward
<br />draft for the warm and relativt~ly moist- air frolll the plains, which passes up the canJ'on
<br />and reaches an altitude whert~ the temperatur'e becomes low enough to condense_, the
<br />moisture." "The upward dl'aft is SUfficiently strong 'to support the moisture for som:e
<br />time after condensation 'begins, but finally the weight of moisture In the air becomes'
<br />too great to be .longer sustained and it is precipitated In torrents.
<br />Cloud-bursts or less violence also, Occur on thle plaIns. The air over a small nrea be-
<br />comes abnormally heated, and the convectJonal currents force the air upward.
<br />Coincident with. a cloud-burst is the other phe'Domenon of a U wall of water" rushl.ng
<br />down the stream." Where the - soU is clayey and has been _ baked bard by the sun, the
<br />conditions are ideal for'rapid l'Uri-off after a heavy- rain. The following explanation of
<br />the It wall of water" Is taken trom Enginperlng aDd Contracting for .Tune 8, 1021:
<br />to When rain begIns to tall more rapidly than the Boll can absorb it, the first thhi
<br />sheet of water that OOWA down the watercourses moves slowly, becam;;e the friction of.
<br />the water Is proportionately greater the shallower toe stream. The friction act~ like n
<br />dam, holding the stream back. Hence it follows that the water tenus to bank up, so that
<br />the rain that f~1I first Is ov~t"taken by rain that tell many minuteR Inter. The cleplH'r
<br />"f~ej ,8~reaDl the faster it flows, fOI' the, frictional resistance is then. l}rOportionatelJ' If'Ss.
<br />.l;otis~u~ntl~' the time come~ when the flood movt's rapIdly down the wuter'~Ol1l'~;:H\ its
<br />fronli{!~egt oftpn being severnl feet dpep and Jooking' like n hug-e sea wn"e nbout to
<br />br{>ak' on ashore."
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