A top fundraising arm for Brooklyn Bridge Park said yesterday it believes the 85-acre development can’t be completed without building more controversial high-rise housing.

As the city held a public hearing yesterday on alternatives to fund the park’s anticipated $16.1 million maintenance budget beyond new housing slated for John Street in DUMBO and by Pier 6 in Brooklyn Heights, the Brooklyn Bridge Park Conservancy issued a statement saying it supports private sponsorship, metering street-level parking and some other option the city is studying.

But the Conservancy said it believes these options can’t cover the $8.2 million in annual revenues anticipated through the new housing and, instead, should be used to “reduce the scale of residential development in the park.”

The group called on the city to make a quick decision rather than allowing the project to remain partially built for many years.

Opponents to housing in the park, however, called on the city to continue exploring all funding options.

Regina Myer, president of the city Brooklyn Bridge Park Corp. said, “we’re looking seriously at all funding opportunities. We remain open to ideas, as long as they involve the full build-out of the park and an ironclad, self-sustaining maintenance plan.”