Sudden New Year's Day 2003dam tourThe second of the "2", Yokogawa Dam
Location: Aza Iriya, Oaza Yokogawa, Tatsuno-cho, Kamiina-gun, Nagano
View of the flood discharge from the top
The second dam in the "2003 Sudden New Year's Day Dam Tour" is the Yokogawa Dam.
To reach Yokogawa Dam, head toward Prefectural Route 201 at the traffic light near Shinano-Kawashima Station on the JR Chuo Main Line along Route 153 (Sanshu-kaido). The rest of the way is straight. It is quite deep in the mountains, so the snow was indeed deep.
View of the embankment from the left bank
No one is there.... At most, one neighbor was walking around.
View of the embankment from the left bank
The dam lake is frozen solid. It looks thickly frozen, but I think it is actually thin, so skating is definitely not allowed. Even though it was frozen, the water was discharged from the gate.
Yokogawa Dam Specifications
| form (something takes) | gravity-fed concrete dam |
| Objective | Flood control, agricultural disaster prevention, unspecified water, river maintenance water |
| Bank height | 41m |
| Bank length | 282m |
| levee length and width | 5m |
| Dam volume | 105,000 m3 |
| Elevation of non-overflow area | EL.918.6m |
| Foundation bedrock elevation | EL.877.6m |
| Watershed Area | 38.8km2 |
| Reservoir area | 14 ha |
| Total storage capacity | 1,860,000 m3 |
| Effective water storage capacity | 1,570,000 m3 |
| Name of Dam Lake | Lake Yokogawa |
| emergency flood discharge | 18 gates x 8.5m (natural overflow by crest) |
| ordinary flood discharge | 3.75m x 2.4m (natural overflow with orifice) |
| conduit gate | Φ400mm |
| River Name | Tenryu River System Yokogawa River |
| Year of launch | 1972 |
| Year Completed | 1986 |
Other facilities/observations
I don't know if there was a parking lot because it was covered with snow.... There was a place to park, so I did.
I am not sure if it was a parking lot or not.
But I put a "circle" on it just in case.
| Parking lot | ○ |
| Toilet | × |
| Park | × |
| PR Exhibition Hall | × |
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