; and (2) be managed in accordance with this section, the Wilderness Act ( 16 U.S.C. 1131 et seq.), and any other applicable law. (k) Climatological data collection In accordance with the Wilderness Act ( 16 U.S.C. 1131 et seq.) and subject to such terms and conditions as the Secretary may prescribe, the Secretary may authorize the installation and maintenance of hydrologic, meteorologic, or climatological collection devices in the wilderness areas or wilderness additions designated by section 2 if the Secretary determines that the facilities and access to the facilities are essential to flood warning, flood control, or water reservoir operation activities. 4. Designation of wild and scenic rivers (a) Designation Section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) is amended by adding at the end the following: (213) East fork san gabriel river, California The following segments of the East Fork San Gabriel River, to be administered by the Secretary of Agriculture in the following classes: (A) The 10-mile segment from the confluence of the Prairie Fork and Vincent Gulch to 100 yards upstream of the Heaton Flats trailhead and day use area, as a wild river. (B) The 2.7-mile segment from 100 yards upstream of the Heaton Flats trailhead and day use area to 100 yards upstream of the confluence with Williams Canyon, as a recreational river. (214) North fork san gabriel river, California The 4.3-mile segment of the North Fork San Gabriel River from the confluence with Cloudburst Canyon to .25 miles upstream of the confluence with the West Fork San Gabriel River, to be administered by the Secretary of Agriculture as a recreational river. (215) West fork san gabriel river, california The following segments of the West Fork San Gabriel River, to be administered by the Secretary of Agriculture in the following classes: (A) The 6.7-mile segment from 0.25 miles downstream of its source near Red Box Gap in section 14, T2N, R12W, to the confluence with the unnamed tributary .25 miles downstream of the power