Cal. Code Regs. tit. 17 § 60109
That segment of the southwestern boundary line of Hydrologic Unit Number 18100100 within Riverside County1, further described as follows:
Beginning at the Riverside-Imperial County boundary and running north along the range line common to R. 17 E. and R. 16 E., San Bernardino Base and Meridian; then northwest along the ridge line of the Chuckwalla Mountains, through T. 8 S., R. 16 E. and T. 7 S., R. 16 E., until the Black Butte Mountain, elev. 4504'; then west and northwest along the ridge line to the southwest corner of T. 5 S., R. 14 E.; then north along the range line common to R. 14 E. and R. 13 E.; then west and northwest along the ridge line to Monument Mountain, elev. 4834'; then southwest and then northwest along the ridge line of the Little San Bernardino Mountains to Quail Mountain, elev. 5814'; then northwest along the ridge line to the Riverside-San Bernardino County line.
Beginning at the San Bernardino-Riverside County boundary and running north along the range line common to R. 3 E and R. 2 E, San Bernardino Base and Meridian; then west along the township line common to T. 3 N and T. 2 N to the San Bernardino-Los Angeles County boundary.
Beginning at the Los Angeles-San Bernardino County boundary and running west along the township line common to T. 3 N and T. 2 N, San Bernardino Base and Meridian; then north along the range line common to R. 8 W and R. 9 W; then west along the township line common to T. 4 N and T. 3 N; then north along the range line common to R. 12 W and R. 13 W to the southeast corner of Section 12, T. 5 N, R. 13 W; then west along the south boundaries of Sections 12, 11, 10, 9, 8, 7, T. 5 N, R. 13 W to the boundary of the Angeles National Forest which is collinear with the range line common to R. 13 W and R. 14 W; then north and west along the Angeles National Forest boundary to the point of intersection with the township line common to T. 7 N and T. 6 N (point is at the northwest corner of Section 4 in T. 6 N, R. 14 W); then west along the township line common to T. 7 N and T. 6 N; hen north along the range line common to R. 15 W and R. 16 W to the southeast corner of Section 13, T. 7 N, R. 16 W; then along the south boundaries of Sections 13, 14, 15, 16, 17, 18, T. 7 N, R. 16 W; then north along the range line common to R. 16 W and R. 17 W to the north boundary of the Angeles National Forest (collinear with township line common to T. 8 N and T. 7 N) then west and north along the Angeles National Forest boundary to the point of intersection with the south boundary of the Rancho La Liebre Land Grant; then west and north along this land grant boundary to the Los Angeles-Kern County boundary.
Beginning at the Kern-Los Angeles County boundary and running north and east along the northwest boundary of the Rancho La Libre Land Grant to the point of intersection with the range line common to R. 16 W. and R. 17 W., San Bernardino Base and Meridian; north along the range line to the point of intersection with the Rancho El Tejon Land Grant boundary; then southeast, northeast, and northwest along the boundary of the Rancho El Tejon Land Grant to the northwest corner of S. 3, T. 11 N., R. 17 W.; then west 1.2 miles; then north to the Rancho El Tejon Land Grant boundary; then northwest along the Rancho El Tejon line to the southeast corner of S. 34, T. 32 S., R. 30 E., Mount Diablo Base and Meridian; then north to the northwest corner of S. 35, T. 31 S., R. 30 E.; then northeast along the boundary of the Rancho El Tejon Land Grant to the southwest corner of S. 18, T. 31 S., R. 31 E.; then east to the southeast corner of S. 13, T. 31 S., R. 31 E.; then north along the range line common to R. 31 E. and R. 32 E., Mount Diablo Base and Meridian, to the northwest corner of S. 6, T. 29 S., R. 32 E.; then est to the southwest corner of S. 31 T. 28 S., R. 32 E.; then north along the range line common to R. 31 E. and R. 32 E. to the northwest corner of S. 6, T. 28 S., R. 32 E., then west to the southeast corner of S. 36, T. 27 S., R. 31 E., then north along the range line common to R. 31 E. and R. 32 E. to the Kern-Tulare County boundary.
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1 Hydrologic Unit Map, 1978, State of California (Southern Half), Department of the Interior, Geological Survey, Reston, Virginia (Reprinted 1987), incorporated by reference herein.
Cal. Code Regs. Tit. 17, § 60109
2. Repealer of subsection (b) and renumbering of subsections (c), (d), (e) and (f) filed 6-16-77; effective thirtieth day thereafter (Register 77, No. 25).
3. Editorial correction of NOTE (Register 82, No. 11)
4. Amendment of subsection (e) filed 8-20-96; operative 9-19-96 (Register 96, No. 34).
5. Change without regulatory effect amending subsection (e) filed 3-18-97 pursuant to section 100, title 1, California Code of Regulations (Register 97, No. 12).
6. Amendment of section heading, repealer of subsection (a), subsection relettering, amendment of newly designated subsection (a) and amendment of NOTE filed 4-8-97; operative 5-8-97 (Register 97, No. 15).
Note: Authority cited: Sections 39601 and 39606.1, Health and Safety Code. Reference: Sections 39001, 39606(a) and 39606.1, Health and Safety Code.
2. Repealer of subsection (b) and renumbering of subsections (c), (d), (e) and (f) filed 6-16-77; effective thirtieth day thereafter (Register 77, No. 25).
3. Editorial correction of Note (Register 82, No. 11)
4. Amendment of subsection (e) filed 8-20-96; operative 9-19-96 (Register 96, No. 34).
5. Change without regulatory effect amending subsection (e) filed 3-18-97 pursuant to section 100, title 1, California Code of Regulations (Register 97, No. 12).
6. Amendment of section heading, repealer of subsection (a), subsection relettering, amendment of newly designated subsection (a) and amendment of Note filed 4-8-97; operative 5-8-97 (Register 97, No. 15).