President Biden plans to add another national monument, this one near Joshua Tree National Park, and is making plans to travel to California in the coming days to dedicate the Chuckwalla National Monument, according to people familiar with the matter. Some Native American tribes, environmentalists and members of Congress have been pushing Mr. Biden to set aside land for the proposed Chuckwalla monument, which lies between the Colorado River and Coachella Valley in Southern California. The designation will add a large new chunk of land to the area next to the Joshua Tree National Park — making it the biggest contiguous protected area in the country. …The designation will bolster the Biden administration’s efforts to protect at least 30% of lands and waters by 2030, and will block the Chuckwalla from mining, drilling and logging, sources said. …Biden has created six monuments and expanded two others officials have said.