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But to critics of the beleaguered MTA, the sinkage of the Hollywood Freeway is reminiscent of a series of subway-related problems - including a sinkhole along Hollywood Boulevard last June.
Los Angeles Mayor Richard Riordan, a member of the MTA board, said he wasn't aware of the sinkage problem, but has ordered a review and daily reports, said his spokeswoman Noelia Rodriguez.
As the sinkage continued during construction, Adams said, additional grout - chemical- and cement-based - was injected into the soil, hardening into a protective underground "arch" that bears up the soil and should prevent further settling.