by the construction of the following generation stations: Matahina Power Station: Commissioned in 1967 the associated 86 m high Matahina Dam has impounds the river to create Lake Matahina. Due to the lake's limited storage capacity the power station operates as a run of the river scheme. The power station can generate up to 80 MW. Aniwhenua Power Station: Commissioned in 1981, above the Āniwaniwa Falls its associated 10 high dam impounds the Rangitaiki River and Pokairoa Stream at their confluence at Black Road, Galatea, approximately upstream from the river mouth to create Lake Āniwaniwa (unofficially known as Lake Aniwhenua). The lake supports a regionally significant trout fishery, as well as duck shooting and other recreation activities. Due to the lake's limited storage capacity the power station operates as a run of the river scheme. The power station can generate up to 25 MW. Wheao and Flaxy Power Scheme: Located in the Kaingaroa forest this scheme was commissioned in 1980 and diverts water from the Flaxy Creek, Rangitaiki and Wheao rivers to power the 24 MW Wheao and the 2.1 MW Flaxy Power Stations. Due to the scheme's limited storage capacity it operates as a run of the river scheme. Stopbanks The development of flood control, mitigation schemes and drainage schemes was undertaken u to the requirements of the Land Drainage Act 1908, Soil Conservation and Rivers Control Act 1941, and specificity for the Rangitaiki catchment Rangitaiki Land Drainage Act 1910 and the Rangitāiki Land Drainage Act 1956. To assist in controlling floods settlements and productive land downstream of Te Teko is protected by a system of stopbanks (also known as floodbanks). These are designed to provide protection from a 1% Annual Exceedance Probability (AEP) flood (also known as the “100 year” flood). Tributaries Heading downstream from its source the river has the following tributaries: Otamatea River. Otangimoana Stream. Also known as Dry Fly Creek Wheao River. This joins the Rangitaiki upstream of Murupara. Horomanga River. This river which joins the Rangitaiki north of Murupara has a catchment of 218 km. Like the Whirinaki this rises in the Ikawhenua Ranges and also contributes relatively large flood flows (and quantities of shingle) to the Rangitaiki. Haumea Stream. Whirinaki River. This rivers which joins the Rangitaiki north of Murupara has a catchment of 527 km. This river rises in the steep bush–covered Ikawhenua Ranges. Being composed of greywacke rock, with little absorption