FLOOD10503

• County: Otero
• Community: La Junta
• Basin: Arkansas
• Title: La Junta Flood Documents
• Floodplain - Doc Type: Correspondence

JUN-08-88 10,28 FROM,ALBUQUERQUE OISTRICT-EOC.
'JUN-03-99 09:30 FROM:DIU 2 DWI~ 719-544'0800

10,5053423488
TO:~S3123499

PAGE 3/10
P~E:002/00,=,

. ,

.

TO:

S&:eve Wiae

nOM:

Frank Kipplc
November f2, 1997

DATE;

SUBJECT:

ArJcan$ll$ Riyer at La Juara, ColoRdo

ClIANGES IN ARKANSAS RIVER CHA.NNEL. 19(;3 -1997

TIIis is in response co a request ro look ill Acbnsas Rive. ~el changes anbe La JUllta saSWg s&itico
and. higbway &ridge. nlC period includes Ibe 1965 flood; and the bcgiMint of storage at Pueblo ~oit,

"[be fim table (Table No. 1) ofth~s memo shows the gage height of the poinr of zero flow tor seven oCthe
ratings trom 1963 to the presem. The poim of 2Zro tl.ow was obtained for 7 ratings (Nos. 30 _ 32. 34 _ 37)
from citherthe raling DJbJes or r:aI~ ~Ne ~D_ It also tndiclWS the ~hangc In the point af ~ t10w
compared to that Oft Ocb)ber I. I 96~. The flood or l~S lowtl'ltd tb~ point of zero nearly a halffoor. but it
has raised a couple of feet s~ th.ar. time,

Table No, 2 compares gage heights of tbe seven ~ tables for S sefec~ discharges ranging froD12D as
to 10,000 cfs_ The dam for 20 cfs. bas trends simiJar to ~ for the poillt of 2t{o flow, The channel
scoured in 1965 dleu gradllaUyaggraded from 1965 to pRSCnt. The cb.anncl is:"bout 1 ~ fOOL higber thaD
i12 J 963. At Cbe high end of the rariDg$. tile gage height was about 5 f= higher in 1991. compared to 1963
for ) 0.000 cfs. The earlier ~. 30 -~2. 34. aDd 35 did not show D'lU1::h c:haage at their upper mds. This
c:oo.ld have bca1 C8u$e([ by an insufficient t1umber of discharge measu.l"ema11s to define the h.igh end of
sorne mings, The 1965 flood probably changed. the ~ ~-discbllCge retaIioa.s&ip, rather tfjllJl just the
lower end.

TABLE NO. I
Point of Zero Flow (PZF) Comparison fqr Sdected ~tiag Tables

Ibtiag Table No. 1

Period Covered by
Rafilag
10.1~3 tCl9-30-64
10-1-64 to 14-65
6-14-6 to9-3~
11.1 1to ~3o-71
10-1-71109-30-80
10-1-80 to 2-28-91
3- - I 1.0 present

roiut of Zt:I"Q Flow (P'
(pge datura)

ill feet Ch3~ of PZ,(l' from Ratint 1130
(in feet)

3(J
31
:32
34
3S

3.30
3.50
3.00
2,88
3.28
4_06
4.75

0_00
+.20
-.30
-.42
-,02
+.16
+L45

37

Ratmg Period Co.ered Di5eb.argc =20 Disdiarge - 80 DisehaFCe - Dixhargc_ Disebargc: -
Table by Rating cfs. ds. SOD cfs, 2000 as 10,000 efs
No. Gage 4 Gage .do Cage ^ Gage ll. Gage .do
Height 2h Heigfllt gll Height 311. Heigbt gJ& Height gh
30 ] 0-.1-'63 [l) 9-30-64 3.61 0 4.QO 0 4.83 0 6.14 0 8.86 0
31 10-1-64 to 6-14-65 ),81 +.20 4.10 +.10 4_8I!f -,03 6.14 0 8,86 0
32 6-14-6S to 9-30.65 3.26 -,35 3.65 -.35 4.67 -,16 6.14 0 8.86 0
34 11-1-6110 9-30-11 3:27 3.92 ' . 1,86 0
-,34 -,08- S.02 "".19 6.23 +.09
3~ 10.:1-71 to~30-80 4.08 +_47 4.46 +.46 5.32 +.99 .6.46 +.32 &.96 +.10
36 I O-I-8D to 2-2g..9 ( 4.52 1'31 4,14 +.84- 5,80 -1-.97 7,08 +-94 9_71 +.85
37 3-1-1991 to~ $.04 1.43 5,4,2 + 1.42 6..5& + I. 75 8.61 +2.47 13,8 -+4.94-
' -.

TABLE NO. 2
Comparison of Gage 8eigilts for Difrerbt~gs at Severa! Disebzrg;es