In a report to the committee, staff said the benefits were having a significant recreational asset within the city which would bring more tourists in.
But the council has not set any money aside in its budgets to carry out the maintenance which includes monthly inspections to the concrete cycleway, timber boardwalk and bridges and gardening and would have to make savings to pay for it. Maintenance on existing river paths is already provided for.
The city council this year rejected a $300,000 request for the new cycleway but signalled its support for the project. It has also agreed to complete a path from the Waikato Equestrian Centre along Pukete Rd to Meadowview Lane.
In the next two months, Waikato District will be asked to sign a similar agreement to maintain its 33km stretch of new cycleway despite the council already contributing $900,000 over three years for capital work.
Waipa District will consider formalising an agreement once issues regarding Mighty River Power land are worked out.
Te Awa River Trail Charitable Trust project manager Jennifer Palmer said the councils had all agreed in principle to covering maintenance and she wasn't sure what would happen if the councils declined to sign.
"Luckily we haven't started anything yet so we would then have to go back to the planning stages, but presumably our trust would then become responsible for maintenance or we would look to liaise with landowners.
"We just haven't explored that at all. This is obviously our preference. The indication from council is it's also their preference but there's obviously a process we have to go through."
The entire 70km river trail, running from Ngaruawahia to Karapiro, is expected to be completed by the end of 2015. The more achievable sections are to be built first with the more troubling parts, such as Horotiu and areas with large numbers of landowners or steep banks, being dealt with later.