WSP07668

• File Number: 8240.200.10.C.5
• Description: UCRBRIP
• Basin: Colorado Mainstem
• Date: 3/21/1994
• Author: USFWS
• Title: Federal Register - Determination of Critical Habitat for Four Colorado River Endangered Fishes - Final Rule
• Water Supply Pro - Doc Type: Publication

.Federal Register I Vol. 59, No. 54 I Monday, March 21, 1994 I Rules and Regulations

.any decision to exclude areas.from
designation as critical habitat, including
information provided during the public
comment period, the Service.
detennined that no exclusions were
justified due to economic e,nd other
relevant impacts.

Critical Habitat Designation

Critical habitat for each species is
shown by State in"Figure 1 and
summarized in Table 4. The 100.year
flood plain delineates the lateral
bolindaxy of the critical habitat for the
razorback sucker and Colorado
sqllawfish, This. boundaxy encompasses
the productive areas adjacent to the

rivers, including the confluence of
-smaller tributaries ilnd other habitats
that provide essential fish habitat when
inundated.
Figure 1. Map of combined critical
habitat for the four Colorado River
endangered fishes.
IUlUHO CODE .u1Q-66-P

'-'.. -

.-

13383

BfLLfrtG CODE 431o.A-C

.TABLE 4.-RIVER KJi.OM~RS (MILES) OF CRri1CAL HAsITAT FOR FOUR ENDANGERED COLORADO RIVER FISHES. .

... .. Razorback Colorado ~ ~
'.'.~'" .:.,~ . .. ... .StaIe .. sucker squawfish TOIaI'
.
. \. .' " . . 349 583 , 95' 95. .. 583
CoIoraiiti"';::~..........~_......':....~:....____.;"......._..__.....__.._............._.
v .. (217) (362) (59) (59) (362)
Ulah. .. .--.............-......---..--...-...........-.............--. 1107 1168 224 .224 .1172
, (688) (726) (139) (139) (728)
New MeJdcO ___.'____.~-,__,~,___.;....__...___,__ 63 97 - .. . 97
.' . (39) (60) , (60)
. . " . I'.. .------ -----
Arti;&{i::.:.:~~_.._........._~..~~.......__.~..~....._....._._.....~.:-~~- .- 832 -..-. 291 ---- 832
~.~_m_:..'_..._.._.:_..__.._.._,_.:.__.:.._:.__.;..;"..~_._~. .. (517) ,---,...- (181) '-'- (517)
209 .-----... --~, -- 103 209
.... . .. . (130) -....-..----. ---........-.. (64) (130)
~ ...............-..-....-................................-.-.....-.-..........- 214 ---.-..--. -----.. 80 294
. (133) -----... .- (SO) . (183)
Basin TOIaI' __...n_.._._n_.n_.n.....n_....._---n...._._...._.n._.. 2n6 1848 610 502 3188
(1724) (1148) (379) (312) 3(1'960)

1 TOl8I-lliotances include all ~ criIical habitat reaches by Stale for aD lotJ- Colorado River endangered fish-
· Basin T otaI-Oistsnc:es inclUde total extent of criIicaI habitat by species for the entire Basin.
3 Total Basin TotaI-Note thai the sum of critical _ by species Is grsater than acIuaI river distance due to extensive overlap.

RazOrback Sucker

4). This represents approximately 49
percent of the historiCal habitat for the
The Service is designating 15 'reaches species. In the Upper Basin, critical
of the Colorado River system as critical habitat is designated for portions of the
habitat for the 1'll2Orback sucker. These Green, Yampa, Duchesne, Colorado,
reaches tota12,776 km (1,724 mil as White, Gunnison, and San Juan Rivers.
measUred along the center line of the Portions of the Colorado, Gila, Salt, and
river. within the subject reaches (Table Verde Rivers are designated in the
TABLE S.-oWNERSHIP OF SHOREUNE IN KilOMETERS (MILES) FOR CRrnCAl HABITAT FOR THE ENDANGERED t;OlORADO
. . RIVER FISHES 1

Lower Basin. These reaches flow
through a variety of landownerships,
both public and private, The amount of
critical habitat for the razorback sucker
by landownership. in kilometers of
shoreline is presented in Table 5.

NPS ___._,_,...__.....nn......._._...___..m......__.._..._......_,'.......,...___..._..__..,..

BLM ____.,_......_........._................._.........._,_...._._..................._.....,__.._._...__.

RazClback Colorado H~ Bony1aiI
sucl<er squawfish cIl:b cIl:b
1,955 900 545 676
(1,215) . (559) (338) (420)
1,140 1,119 203 114
(708) (695) (126) (71)

Ownership'