More than three decades after a landmark decision called for Los Angeles to limit its taking of water to raise the level of Mono Lake, California regulators are reexamining why the lake still hasn’t rebounded and what should be done about it. At the request of state water officials, UCLA climate scientists developed a new model to analyze why the lake remains far below its state-mandated target level. In a new report, they said that without L.A.’s use of water from creeks that feed the lake, its waters would be about 4 feet higher — closer to that required threshold. … DWP managers said they have questions and want to vet the UCLA analysis.