E01 01 Figs 01 10.Pdf, 15.38 MB

Home , Brownlee Dam, Oxbow Dam

Theme: i:\relic\hellscan\watermng\vicinity.mxd

12 Dayton Lewiston

r ive WALLA WALLA R 13 e 129 nd o R e Grangeville nd ra 11 G

3 r e v i

204 r

R e v

a i

h R

n r n

e o m

I iv m R l

82 82 e Enterprise k a n S La Grande Hells Canyon Dam

95 Oxbow Dam P . i n v e e R C rs o r h e d e il

203 k 86 W

71 McCall 86 Baker City Brownlee Dam Council

Cambridge 245

84 Cascade

95 55

26 Weiser 201

. v R e e 201 21 h y w BOISE O

Nampa

Features Legend Tech. Report E.1-1 Figure 1 HELLS CANYON HYDROELECTRIC COMPLEX WASHINGTON Water Body

R na ke i S ve r

C olumbi River a o Area and Vicinity Map lm Sa n River Streams Hells Canyon Oxbow Brownlee OREGON Interstate Highway IDAHO

Snak e River State Highway Major Road Vicinity Map Urban Areas

03.75 7.5 15 22.5 Cities Miles

Scale = 1:950000 Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 142 Hells Canyon Complex Theme: i:\relic\hellscan\watermng\e11f02.mxd

12 Dayton Lewiston

r ive WALLA WALLA R 13 e 129 nd o R e Grangeville nd ra 11 G

3 r e v i

204 r

R e v

a i

h R

n r n

e o m

I iv m R l

82 82 e Enterprise k a n S La Grande Hells Canyon er Dam iv R 95 e rs P o i h n ld e i C W McCall re e Oxbow Dam

203 k 86

71 86 Brownlee Dam Baker City Council

245 Cambridge

84 Cascade

95 55

26 Weiser 201

. v R e e 201 21 h y w BOISE O

Nampa

Features Legend Tech. Report E.1-1 Figure 2 HELLS CANYON HYDROELECTRIC COMPLEX WASHINGTON Alluvium Gneiss/Schist Metamorphic e R na k iv S e r

C lumb River o ia m Geology of the Study Area l o Argillite and Slate Granite Sand Dune ve S a n Ri r Hells Canyon Oxbow Brownlee OREGON Basin/Range Intrusive Sedimentary IDAHO

Snake River Carbonate and Shale Lake Sediment and Playa Tuff Conglomerate Landslide Ultramafic Vicinity Map Glacial Dift or Ice Loess Volcanic Water 03.75 7.5 15 22.5 Miles

Scale = 1:950000 Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 144 Hells Canyon Complex Theme: i:\relic\hellscan\watermng\e11f03.mxd Lake e a v t i i R n R iv Wirth Reservoir, 1966 er Thief Valley, 1932 Salmon

k r o Hells Canyon, 1967 F Cla rk r

n nyon e Ca

iver o R v Day i Reservoir m R R h e

n d ut Sal Lake o R Hebgen Lost Valley, 1910 o Jo Lost Valley S o hn Payette Lake m Reservoir l c a k

S R Fork Pow i k v r r e der o r R ive F iver le North eR d ill Middle id Buffalo B ak n Oxbow, 1961 M Reservoir S Fork Lima Reservoir enry's John Day River H Lake r e Phillips Brownlee, 1958 iv R Reservoir stone River Yellow ll u b Cascade Reservoir y e e C Ben Ross, 1937 Lak r Unity, 1938 G

R e ive is Burnt r e 15 eservoir Shoshone 84 W Island Park R ewis Lake L Lake Heart Willow Creek 3, 1944 Mann Ck (Spangler), 1967 Lake

Deadwood eek CraneCreek r Higgins, 1932 Reservoir C Reservoir Sunshine Reservoi r Paddock Crane Creek, 1912 Camas Valley Reservoir er Li t

Riv e e Jackson t Redfish ake Payet Lake L Lost Paddock Valley, 1918 Redfish Agency Valley (Beuhla), 1935 Bully Creek, 1963 Lake Ri rk ver Mud Lake Fo Leigh Lake er Black Canyon, 1924 iv ny R Beulah nry's Jen Reservoir Lake Alturas He

Lake Snake

Sn M er alheu r R iv ake Deer Flat Lower Dike, 1907 River

F ivem Boise River ile Warm Springs,War 1919m Springs Owyhee, 1932 Deer Flat Upper, 1908 r e woody C Reservoir Riv Din r Big Los Lakes ee Arrow Lucky Peak, 1955 k Rock t Reservoir Lake Lucky Peak Owyhee Reservoir Lake Lowell

Star Mountain, 1961 S Anderson n 15 a Ranch Bull ke Reservoir R Pal isades Lake iv voir e Reser r Malheur Lake New For k Blacks Creek, 1915 Magic Lake Reservoir illow Harn W

ey South Fork Reservoir, 1968 r e Lake Twin Lakes Lak

Reservoir ve Fremont

River Ri 84 Grays Lake Lake

Cow Lakes

Swan Falls, 1950 ood

he g i

B Portneuf Reservo ir Bla ckfoot Owy Reservoir Am e rican Falls Antelope Reservoir Reservoir

Bluejoint Lake Lake Walcott 86 S nake River

BigSandy Reservoir

C lo v e

Alvord r r C Lake e r v e i e R k r a 84 e B B

ee R u v yh i i v le Ow er n Fontenel R e Reservoir a e e u h y R Gre w i en v alls 15 R O Salmon F i e ve Sout r ek r le Cre t it Reservoir

L L h it

Wes tl Bear t e Lake Fo

r k

Ow O yhee w y hee

K R F iv 84 ks o i n c rk er la g R B s iver R iv e

r Muddy Cre

Wild e Horse k Reservoir

er Summit v Lake Ri at n Gre in u Q Causey Reservoir 80 bo um ldt H River Salt Flaming Gorge oir High Humbol Reserv Rock Lake d t Lake

ttle 84 i L

Features Legend Tech. Report E.1-1 Figure 3 Vicinity Map Washington HELLS CANYON HYDROELECTRIC COMPLEX Lake, Reservoir Upper Snake Dams Montana Hells Canyon Hells Canyon Complex Oxbow Brownlee Dry Lake Upstream Basin Development Oregon Upstream Terminus Dams Idaho Wyoming Rivers and Streams Other Dams (circa 1968) Interstate Highway Nevada Utah State Boundary Available for Sediment Supply Sediment Supply Trapped

030609015 Miles

Scale = 1:2200000 Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 146 Hells Canyon Complex E G D I R

Theme: i:\relic\hellscan\watermng\e11f04.mxd

k T

e I

r M C M

U C r S e Hells e Hells Canyon Cr. Canyon k t Rec. Site ich i Dam R m m Su D e

p Snake River at Hells Canyon Dam i d r ap e R v i

k ree C C re

ek w ot a bo r ek m G e u a c orth r G h M N C a 255

m m I ku Skoo

Big Bar

e e

k Cr ee k

k ree 260 C Duck ek Cre k e e r C

R E IV R

Hells r a Canyon e e 265 B

i Park

Pine Creek near n Oxbow, Oregon ia d h In lc u G h r rt e o v k N Copperfield 270 i e R Park e Oxbow r Dam C

F n i i k s a e h e L r 275 lt c C Sa M

Oxbow Boat e n Ramp P i Cr eek E K A N S e rs o h Carters 280 il d Halfway Landing W

E a g l e

OX Ranch

Brownlee McCormick Dam Park Wildhorse River W 285 A T D at Brownlee Dam E T P u R O o ke B B s U s IN R y Y

V alle C D y Woodhead re I e T Park k C C H r e

k k

D 86 e IT 290 r C Richland H RE S. C 71

Powd Hewitt and E er EE a ver Holcomb NL st Ri W C Parks RO e o e B l t t n

w n w o

L r o B o

n o Council

d g

l d

d 71

H i

o 300 M

l o k e w re C t s S e t u C W r g r N i e or ll e th Fork k

E V I 3R 05 y l C a r e D e k

Durkee C o nnor

. 31E0S R Mountain Cambridge Man Resort Creek Denn ett

C r e e E k E L N OW 31B5R W olf reek C T r a 84 i l

r Dixie . 320 R Midvale ock

S Cre ek

95 Lime 325

G Crane Creek Spring ro Reservoir Rec. Site Steck u se Bu r Rec. Site rn ive t R

Huntington 330 Cr.

Farewell 84 Snake River at Bend 335 Weiser, Idaho

Snake Rv. 340 Cobb R.V. Park Oasis Paddock 201 345 350 Weiser Valley Reservoir 84

Features Legend Tech. Report E.1-1 Figure 4

Water Body Flow Gaging Station HELLS CANYON HYDROELECTRIC COMPLEX W A S H I N G T O N

e R na k iv S e r

u ver C o l m bi Ri Streams a m Hells Canyon Complex Development l o v S a nRi er Hells Canyon Oxbow Brownlee Primary Route O R E G O N I D A H O

Snake Riv Secondary Route er

Urban Areas Vicinity Map Cities 320 0 1.5 3 6 9 River Mile Miles

Scale = 1:340000 Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 148 Hells Canyon Complex Theme: i:\relic\hellscan\watermng\e11f05.mxd o C k e D re C

D R r IV e E v D R i ide R Div

D D n

C mDo Creek D l

h Sa

r China Bar y C D o o k 190 Bar 193.80 D

D D D D

D Bar 196.75 k C e D e r r ee C k D D Bar 201.05 D D 200 D D D D f D Wol Bar 204.25 D SN A D K Ge r D E tta e iv R D D Creek e e p D Li

g h t n D i n C Bar 208.25 g o w r. D C es a n k h o e J e a r n D C m I 210 Canyon D g Bi

k C C D

r e r e r e

e e e r

e e k C k k D RI VE R y D urr K

D Pittsburg n C pto o Landing Klo w D

S C le ou Fish Trap Bar e g D py a C r o r ra L D l i g C Triangle h C r C r tn ee D K Mtn . i r ir n b k e y g S e 220 al k D t Kirkwood C Historic r. D C C Ranch r r D e . K e i Imnaha k rk D wo Creek od

D C C r r e e e e k k ce n DC ra a e ribo p u Salt Creek Bar m D e

T Cre

r D ek

v i

R Pine Bar D H o R k r r s u Fo e s h s D rk la Sh C 230 ee D p C S r l C . D uice r. Johnson Bar

a D

h a C

C n r

r e

m e e I

e D k

D Riggins

Creek D

r D e R v E i V R I R D T h re e D k Cree e l d 240 d D

r ek D a re n

C i

D e

s E rou

G K D

A N

k S

e a

r D h Barton

C r a

Heights e

n k

e i

e D

I R

r C D C re e Hells k Hells Canyon Cr. D Canyon t Rec. Site ich i m Dam R D m Su D Features Legend Tech. Report E.1-1 Figure 5 Vicinity Map HELLS CANYON HYDROELECTRIC COMPLEX Washington Water Body Montana Streams l Hells Canyon Significant Sites in Hells Canyon l Oxbow l Brownlee Primary Route Oregon Idaho Secondary Route Wyoming Sandbar Study Areas 225 D Nevada Utah River Mile

02.557.51.25 Ê Miles Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 150 Hells Canyon Complex Theme: \\dallas\gis_rpm\relic\hellscan\watermng\e11f06.mxd D D D D20 D D D

I d a Washington h D o Oregon se Hor D C r D ee k Cochran DRapids Cougar180 DRapids

k e S re D N C C A R

K W s

E R

g a

n D a

i n

r i A p t p b t S I a s l

D G e C h d s l i o l n C k l e D a a re C k e D R r IV e E iv D R ide RM iv O D

U D NT D o n A R

C lmD IN Cr eek D a i

h S d e g

r e r R C y D i o d ok g 190 D e D D D D D k e C e D r re e C k D D

D D 200 D D D D lf D Wo D S N D A G r S DK ett e E a iv U R D D Creek M e e M p D L

i g I h T t n D i n C g o w . R D r s C a I ne k h D J o e a e r n G D C m I E 210 Canyon D g Bi

C k

C C D e

r r eek r e

e e r

e e C

k k D R IV E R y D urr K Pleasant Valley D Island n D Pittsburg o C Landing pt ow Klo D

S Co le u D ep g y a C r o r ra L D l i g C Triangle C h r C r e Mtn tn D Ki . i e r rb n e y k g S e 220 a k D lt Kirkwood C r. D Historic C Cr Ranch

e . D K Imnaha e ir

k k D wo Creek od

D C C r r e e e e e c k k n D ra C e ar p ibou m D e

T Cr r e

D ek

e v E

i G R ID D H R o R k r or s u F e s s h D rk la S C 230he D ep C S r l C . D

uice r.

a h D

a C C

n r

r e m e

I D e e IT k k M M U S D Riggins

Creek D

r D e R E iv V R I R D T h re e D reek e l C d 240 d D a

r ek E D a re n C G i t D e I R D

se E u ro K

G A D

N k S e

e a r D h Barton r

C a

e k Heights n

T v e

I i

e D I R

r M C M D U C S re Hells e Hells Canyon Cr. D k t i Canyon h Rec. Site c m Ri Dam m D u S D e

D p

250 D

d Features Legend Tech. Report E.1-1 Figure 6 HELLS CANYON HYDROELECTRIC COMPLEX W A S H I N G T O N Water Body Year of Photography

e R na k iv S e r 1946 er C olumbia Riv Streams lmon S a iver Aerial Photography Coverage in the R Hells Canyon 1948 l Oxbow D l Brownlee River Mile 235 O R E G O N 1949 Hells Canyon Reach of the Snake River I D A H O

Snake 1955 Rive r 1961 1964 Vicinity Map 1968 1973

1977 03691.5 1982 Ê Miles 1997 Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 152 Hells Canyon Complex Idaho Power Company Sediment Transport, Supply, and Stability

Figure 7. Bed-material structure in a typical gravel-bed river or stream.

Figure 8. Photograph of a dry gravel bar with the PVC frame and two golf balls for scaling.

Figure 9. Underwater photograph of surface particles.

Hells Canyon Complex Page 153 Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 154 Hells Canyon Complex Theme: \\dallas\gis_rpm\relic\hellscan\watermng\e11f10.mxd

D D

D 290 D D D B

D r D o

D D D w

D n l

D e

D D D e

D D C re

D e k

D 300 D

D S t u r g i D ll C re e D k

D Con nor C D ek r e e r C e 310 k D t et n n D De

D D

D 320 D Ro ck

D C reek

D 330 D

D D D D irch Cr B ee D k D 340 D

D D D

D D 350 D D D D D D D D D D D D

D D D

360 D

Features Legend Tech. Report E.1-1 Figure 10 (Panel 1 of 3) Vicinity Map HELLS CANYON HYDROELECTRIC COMPLEX Washington Water Body Montana Streams l Hells Canyon Tributaries Selected for Sediment Oxbow l Brownlee 235 D River Mile Oregon Supply Calculations Idaho Wyoming Basins

Nevada Utah

03691.5 Ê Miles Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 156 Hells Canyon Complex Theme: \\dallas\gis_rpm\relic\hellscan\watermng\e11f10.mxd D

D 230 D

h e D e p

D e k

D reek Bernar le C d d d C a D

S r

e e

k D

D 240 D

r. C Battl e D G r a D n i t e

C D r e ek D

250 D

De e D p C re ek D , ID

k D e e nney C r Ki ree C k

w D

G D

c M

D ek D re C n a 260 di D In k e re D C r a e lk Creek B E D

k D e e M r

C a i D k n c

P L i

n k

e e D

e C r

r C e e e D in D k D P h k rt 270 e o D

C e N D

r l

e C

a e D r

C i P F r t is

e s a h D

e E

C k r e e D k

D r e iv R r d D e e v k i o R ro e D C rs o h 280 ild D W

D D

D 290 D D D Features Legend Tech. Report E.1-1 Figure 10 (Panel 2 of 3) Vicinity Map HELLS CANYON HYDROELECTRIC COMPLEX Washington Water Body Montana Streams l Hells Canyon Tributaries Selected for Sediment Oxbow l Brownlee 235 D River Mile Oregon Supply Calculations Idaho Wyoming Basins

Nevada Utah

03691.5 Ê Miles Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 158 Hells Canyon Complex Theme: \\dallas\gis_rpm\relic\hellscan\watermng\e11f10.mxd D

D 180 D

k e D e r D C

k o k o D ee C D r C D d e D Divi k e

C D

e 190

h D C D D D D D D

D k

D e

e r

D C D 200 lf D D o D D D W

D G D etta Cre ek D D

e e p D

e D

O R D

D d , I yon 210 Big Can D

S C o a D r l r t a C l C r re e D ek e k 220 D

D Kir D kw oo d

k D C e r re e C e c e k n D ra e p m D e T D

D 230 D

h e D e p

D e k

D Bernar Creek d e l C dd a D r

S e e

D 240 D

Features Legend Tech. Report E.1-1 Figure 10 (Panel 3 of 3) Vicinity Map HELLS CANYON HYDROELECTRIC COMPLEX Washington Water Body Montana Streams l Hells Canyon Tributaries Selected for Sediment Oxbow l Brownlee 235 D River Mile Oregon Supply Calculations Idaho Wyoming Basins

Nevada Utah

03691.5 Ê Miles Sediment Transport, Supply, and Stability Idaho Power Company

This page left blank intentionally.

Page 160 Hells Canyon Complex