Know More about Miyagase Dam
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Miyagase Dam's related Facilities
Ishigoya Dam
The auxiliary Ishigoya Dam is located 800 m downstream of Miyagase Dam. It was built to help stabilize discharge flow, maintain an appropriate water level in the Tsukui Channel, still discharge from Miyagase Dam, and secure water for electricity generation. It stores water discharged from Miyagase Dam, controls the amount of water necessary for maintaining rivers in a healthy and safe state and discharges water to the downstream of Nakatsugawa River.
It was designed to incorporate the landscape of the former Nakatsugawa Valley and the vicinity's natural environment.Specifications Dam Location:
Left bankMukaihara, Aikawa-machi, Aiko-gun, Kanagawa Prefecture Right bank Osawa, Aikawa-machi, Aiko-gun, Kanagawa Prefecture Type Concrete gravity dam Dam Height 34.5m Crest Length 87m Volume of dam body Approx. 45,000m³ Elevation of controlled part EL. 160m Reservoir Submerged Area 0.043km² Gross Storage Capacity 557,000m³ Effective Storage Capacity 386,000m³ Normal Top Water Level EL. 153m Related Facilities
Aikawa Power Station No.1
Located immediately downstream of Miyagase Dam. Utilizes hydraulic power generated by the difference in its elevation to Miyagase Dam to generate electricity during peak hours of demand.
Aikawa Power Station No.2
This power plant generates electricity 24 hours a day using discharged water stored and controlled at Ishigoya Dam.Role of Channels
The two channels play an important role as facilities necessary for integrated water management.
Doshi Channel
Conducts water from Doshigawa River to Miyagase Dam to maintain sufficient water levels within Miyagase Dam.Tsukui Channel
Sends water stored in Miyagase Dam to the upstream of Shiroyama Dam when water levels of dams along the mainstream decrease.-
Doshi Channel outlet
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Tsukui Channel intake
Doshi Channel Tsukui Channel Inlet Aone, Tsukui-machi, Sagamihara city, Kanagawa Prefecture Hanbara, Aikawa-machi, Aiko-gun, Kanagawa Prefecture Outlet Toriya, Tsukui-machi, Sagamihara city, Kanagawa Prefecture Aoyama, Tsukui-machi, Sagamihara city, Kanagwa Prefecture Length Approx. 8km Approx. 5km Flow volume 20m³/s (max) 40m³/s (max) -