The Manuherikia Catchment has been studied extensively during the past 150 years. The following historical reports provide: An insight into why certain infrastructure decisions were made and what other options were considered at the time; A record of dam material and construction methods; The challenges of the existing infrastructure and ideas for improvement; Numerous ideas on new development options; and Hydrological data dating back more than a century. Central Otago irrigation Report of working party on Central Otago irrigation Irrigation in Central Otago and Appendices Ministry of Works 1954 B Ministry of Works – irrigation in Central Otago Central Otago Irrigation Investigation Committee Dam safety Otago irrigation dams – design flood check August 1989 Ministry of Agriculture and Forestry policy – Central Otago irrigation dams Otago irrigation dams – dam break hazard assessment Dunstan Flats Proposed Dunstan rural water supply scheme Falls Dam Manuherikia River Falls Dam Falls Dam – Manuherikia River The Manuherikia Rock Fall Dam Falls Dam site visit report (1985) Galloway Lower Manorburn Dam Ministry of Works – Galloway Irrigation Scheme, Lower Manorburn Dam Lower Manorburn construction Idaburn Idaburn Dam Refurbishment of Hawkdun and Idaburn irrigation schemes Idaburn Irrigation Scheme Early water races in Central Otago Ida Valley Ida Valley Irrigation Scheme 1954 (Part A) (Part B) Ida Valley Irrigation Scheme 1955 (Part A) (Part B) (Part C) Ida Valley Irrigation and Increased 1965 Supply (Part A) (Part B) (Part C) (Part D) Ida Valley Irrigation Scheme 1966 (Part A) (Part B) Cover letter 1979 Map Notes from file Poolburn Dam Upper Manorburn Dam Ida Valley Irrigation Scheme Manorburn, Hopes Creek and Poolburn dams PART A PART B Manuherikia Manuherikia Irrigation Scheme PART A PART B PART C Manuherikia Irrigation Scheme geotechnical studies for feasibility study and Appendix A Refurbishment of old Central Otago irrigation schemes Manuherikia River – catchment water resources Part 1 Part 2 Manuherikia Valley – pre-feasibility study on civil engineering Manuherikia Valley – pre-feasibility study on social and economic impacts Manuherikia Catchment water resource study – summary Manuherikia Valley irrigation – feasibility study Omakau Omakau Irrigation Scheme Part A Part B Refurbishment of Omakau Irrigation Scheme headworks Omakau Scheme feasibility report Lower Manuherikia Manuherikia drinking water security review Manuherikia high level overview Manuherikia mini-hydropower station pre-feasibility Manuherikia summary Hydrology study Manuherikia detailed concept study Other Flood Damage Report Niwa’s freshwater update Water Quality in New Zealand: land use and nutrient pollution and the proposed Amendments to the National Policy Statement for Freshwater Management.