65.
YASAKA
DAM
l,ocation
Nearest
Citv
River
Purpose
Catchment
area
Mean
annual
discharge
Years
of construction
Type
Foundation
Height
Crest
length
Volume
Spillway
Type
Type
and
number
of
gate
.
Maximum
discharge
capacity
Reservoir
Gross
capacity
Effective
capacity
Area
Drawdown
range
Owner
Engineering
by
Construction
by
/
Iwakuni-shi, Yamaguchi-ken
(right
b_ank)
Otake-shi
Oze
bank),
Otake-shi,
Hir,cshima-ken
(left
Flood control, Maintenance
of normal
function
of the
river water.
Water
supply and Hydroelectric
301km'
11.8m3/s
1e8H1987)
Gravity
Slate, Chert and Sandstone
l20m
540m
1,6ffi,000m3
Controlled
Crest radial
gateX4
and
Orifice radial
gate X
3
4,050m3/s
lLzx 10tn3
106
X
101n3
3.6lkm2
75m
Ministry
of Construction
Ditto
J. v. of Maeda construction
co.,
Ltd.,
okumura
Gumi
(corporation
and
Japan Development
& Construction
Co.,
Ltd.
-
_'.76