Their original design cost three-hundred-thousand dollars; it was the most expensive restaurant built in 1956.
Private donations of $7 million covered design costs, construction and interior renovations that are still under way.
That will cost about $55,000 in additional excavation and design costs.
The construction of a second skin may also present a significant increase in materials and design costs.
Others preferred expendables for their lower design risk, and lower design cost.
The Crown family, for whom the fountain is named, donated $10 million of the $17 million construction and design cost.
That was on top of $11.4 million allocated last year for architects' fees and other so-called soft design costs.
Typically they pay for design costs and workshops.
Since the information on the website is excluded from the relief, it follows that the associated design costs are also excluded.
One amendment would subject any project costing more than $40 million to an independent review of the project's design, feasibility, cost and environmental consequences.