Shubow said his organization is actively encouraging Congress, which appropriates some of the funding for the monument, to intervene.
Rep. Rob Bishop (R-Utah), chairman of the Natural Resources subpanel dealing with national parks, suggested in March that he could recommend withholding further appropriations if stakeholders are unable to reach an agreement.
A spokeswoman for the Natural Resources Committee told Roll Call the panel is continuing to watch the situation closely but no decisions have been made about how to proceed.
Terri Henderson, 6, center, whose mother is El Salvador, attends a rally with members of Congress at Union Station's Columbus Circle to announce the Restore Opportunity, Strengthen, and Improve the Economy (ROSIE) Act on July 29, 2014. The legislation provides incentives for government contractors to pay a living wage and other benefits that would help low-income workers.