FLOOD07230

• Designation Number: 29
• County: Larimer
• Community: Fort Collins
• Stream Name: Cache La Poudre River
• Basin: South Platte
• Title: Floodplain Information Report - Cache La Poudre River, Colorado, Volume I, Fort Collins, Larimer County
• Date: 10/1/1973
• Designation Date: 3/1/1974
• Floodplain - Doc Type: Floodplain Report/Masterplan

GLOSSARY OF rER~S

I
II
II

E1earing

The horizontal angularmeasurUllnntotaline, inae'lree5,
'Hot or west ot a north-south reference line.

Flood Profile
--

FloM

~, graph sho; i ng the re I"tionship of water surface a leva-
tien to location, the latter gonerally oxpres5e~ as distance above ~out,
forastreaMof"atcrflo.;ing Inanorenchanr:el. Itisgenerallydr""n
tosho.;surf<.>ceeleyationforthecrestofaspeclficflood,butmav
,~ prepared for conditions at a given tiMe or sta~e.

An oyerflow On lands not normally covered by w~ter and
that are used or u$able by man. Floods have two essential characteristics:
The inuM"tjonof I"no Is tpmpor-"ry; "no the land is adjacent to and inun-
detedbyoverfIO'wfromar-ivcr-orstr-eamor-anocean, lake or other body
of standing water.
l.Jarmallya flood Is considered "5 any t""'pornry rise in
stroamfloO/orstilqe, butr\Qfthi>p.ondingof sur/acewilter, thatresu Its
In sinnlflcant adverse effOGts in the vicinity. Adverse effects ~~y
Include damages frem overflo" of landare3s,tempor3ryback"atereffocts
In sewers and local dr3inaqechnnnels, crOdtlonof unsanitary conditions
or other unfaverable situations ~y dcpositlon of materials in stream c~annols
durinn flooo recossions. use of qround "ater- coincident with increased
5tre,.nflow,dndotnerprool","s.

Flood Stage

Thestaf]eorelBvationatwhlcllovurflCtiofthenatural
Clanks of a stre"m or body 01 water beg Ins I n the reac.~ or arca in which
the elevation is moasured.

Head loss

The effect 01 cbstructions, such as MrrOll bridqeoreni"'1S
or bu 11<:lngs th"t Ilmjt the arell thrOJg~ w h ;eh water must f 101, raisin;)
tho surtaceof the ",,,ter upstream frO'" the dJstruction.

Flo0dCrest

InterMedl3te

Reoional Flood
-,-~----

A f lood h~vlng il one percent prcb3b Illty 01 occurrencO
In ilny yenr or iln nyerago frn~"ency of occurronco in tho ordor of onco
I n 100 yoars, The f load mav occur Tn anv yCiJr. It 15 bJS()C On stat I s~i-
calanalysisnfstreamflOll recordsand3nalysesol reinfall "ndrur>olf
characteristics in the gener~1 region of tho "ater;~~d.

The rni;lX i"'urn st~qe or eleyatio~ r~"ched by the w~turs of ;,
11004 at a giyon location.

FloodPI/lin

Tne rel,Jtively fla~ ."<13 or lo'~ !anclS Jdjolnin'1 ne channel
of J r ivor, stre"", or w~t<)r course or ocedn, I~ke or o~her !lOdy of r,tM1C In'1
'~J'er. which 1"'5 been or ",~y he covered by f lood '~rlter.

Left [lank

T~e bank on the le't $ idB of il river, 5treum or w"ter

course,looklngdo.,nstrcam.

'leference Point

::'4

..~ nunt; ,-,rod ~c i nt i I:"nt i f y: r.g a socc I f i: : OCJt i o~ for

C0rrQ lat ing thD ,1;Jt~ 5hc)N n in Yrlri""S for"1S thr()!jg~owt the ,.,,'o,'t.

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