The park commissioners reported in June 1860 that $4 million had been spent on the construction to date.[119] As a result of the sharply rising construction costs, the commissioners eliminated or downsized several features in the Greensward Plan.[120] Based on claims of cost mismanagement, the New York State Senate commissioned the Swiss engineer Julius Kellersberger to write a report on the park.[121] Kellersberger's report, submitted in 1861, stated that the commission's management of the park was a "triumphant success".[122][123]