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The annual result for the 2014-15 year reported the fund's value grew from about $75.5million to $85.4million, before distributions to the council of $3.4 million.
That left the value of the fund at $81.6million, comfortably above the inflation-adjusted target of about $80million.
That was the figure needed to stay ahead of the official cash rate and consumer price index and maintain the fund's capital base.
Council group chief financial officer Grant McKenzie said the ''solid'' result reflected strong equity in bond markets and a weakening New Zealand dollar.
The distribution to council was budgeted to increase slightly over the period of the council's 10-year plan, but there were no plans to increase that as a consequence of the better-than-expected result, he said.
''We haven't been above that inflation-adjusted amount for a number of years, but I think it would be prudent for us to continue to build a bit of a buffer, so that when the market does change we do have some facility still available for us.
''The problem you've got is ... the market changes up and down like a yo-yo.''
However, councillors would consider a report later this year on the council's existing asset portfolio - including the Waipori Fund - which would consider the appropriateness of continued ownership of the assets, he said.
The report was still being prepared and the exact due date was not yet known, he said.
The annual distribution from the Waipori Fund was not earmarked for specific projects, and instead went into the council's general pot, helping to offset rates.
''It's just a funding stream for council,'' Mr McKenzie said.
The exact amount to be distributed was based on an estimate of free cashflow expected once the fund's capital base was protected, he said.
The fund was created from the sale of the Waipori electricity generation scheme, and was worth $56 million in 1999.
Annual distributions had grown steadily over the years, from $1.3 million in 1998-99 to $4.1 million in 2010-11.
Distributions were later pared back to $1 million a year in 2011-12 and 2012-13, before increasing again to $5.4 million in 2013-14.
That decision came after the fund's capital value eroded from a peak of $76.1million in 2007 to $67million two years later. It has recovered in the years since.