101. The e x i s t i n g p r o j e c t was a d o p t e d i n 1922, p r o v i d i n g a 7 , 5 0 0 - f t
j e t t y on t h e n o r t h e r n s i d e of t h e mouth by e x t e n d i n g a 3 , 3 9 0 - f t j e t t y con-
s t r u c t e d by l o c a l i n t e r e s t s d u r i n g
t o 1919. C o n s t r u c t i o n began i n 1923,
was h a l t e d i n 1926 due t o lack of f u n d s w i t h t h e j e t t y 70 p e r c e n t c o m p l e t e ,
and completed d u r i n g 1928 t o 1930. The j e t t y was restored d u r i n g
1942, i n c l u d i n g p l a c i n g a c o n c r e t e c a p on t h e o u t e r 3 , 9 7 7 f t .
102. A s h o r t s o u t h j e t t y was a u t h o r i z e d i n 1930 and c o n s t r u c t e d d u r i n g
1933 t o 1934. I n 1935, a ,
e x t e n s i o n was a u t h o r i z e d . The work was
completed i n 1938, i n c l u d i n g a m o n o l i t h i c c o n c r e t e b l o c k , 46 f t l o n g by
ft
wide by 16 f t h i g h , p l a c e d a t t h e head of t h e e x t e n s i o n and f l a n k e d by f o u r
wing blocks and two end b l o c k s . The s o u t h j e t t y was t h e n 4 , 2 0 0 f t l o n g and
s o u t h of t h e end of t h e n o r t h j e t t y . A 550-ft shore con-
t e r m i n a t e d 1,800
n e c t i o n was added i n 1940.
103. The o r i g i n a l j e t t i e s d i d n o t p r o v i d e a n a d e q u a t e e n t r a n c e . I n
a d d i t i o n , t h e e b b c u r r e n t s met t h e s o u t h j e t t y a t a n a b r u p t a n g l e , c a u s i n g
d e t e r i o r a t i o n and s u b s i d e n c e of t h e s t r u c t u r e . A h y d r a u l i c model s t u d y was
c o n d u c t e d a t t h e U Army E n g i n e e r Waterways Experiment S t a t i o n
during
S
to
t o d e t e r m i n e t h e b e s t method of improvement. Based on t h e model
s t u d y r e s u l t s , a 4 , 2 4 0 - f t t r a i n i n g j e t t y was c o n s t r u c t e d p a r a l l e l t o a n d a l o n g
t h e s o u t h s i d e of t h e e n t r a n c e c h a n n e l d u r i n g 1950 t o 1951. The t r a i n i n g
j e t t y t e r m i n a t e d a b o u t o n e - h a l f mile s h o r t of t h e end of t h e s o u t h j e t t y .
104. The s o u t h j e t t y was r e h a b i l i t a t e d i n 1963. I n
a second
h y d r a u l i c model s t u d y was i n i t i a t e d a t
which recommended e x t e n d i n g t h e
t r a i n i n g j e t t y t o t h e end of t h e s o u t h j e t t y . The n o r t h j e t t y was r e h a b i l i -
to
and t h e t r a i n i n g j e t t y was e x t e n d e d d u r i n g
tated i n
The j e t t i e s a p p e a r t o be i n good c o n d i t i o n a t t h i s time. A chro-
n o l o g y of e v e n t s r e l a t e d t o t h e development a n d r e p a i r of t h e j e t t y s t r u c t u r e s
Yaquina Bay, Oregon
Yaquina Bay i s l o c a t e d on t h e Pacific coast o f Oregon, 113 miles
s o u t h of t h e Columbia R i v e r .
The town of Newport, Oregon, is located a t t h e
mouth of t h e bay.
107. The o r i g i n a l p r o j e c t was a u t h o r i z e d i n 1880 and i n c l u d e d two con-
f t to
v e r g i n g h i g h - t i d e rubble-mound j e t t i e s . The n o r t h j e t t y e x t e n d e d
t h e p r e s e n t a n g l e i n t h e j e t t y , and t h e s o u t h j e t t y was 3 , 6 0 0
long, with
t h e e n d s of t h e j e t t i e s 1 , 0 0 0
The o r i e n t a t i o n of t h e j e t t i e s was
apart.
30
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