SCIGN Site Evaluation Report Site Name Wind Gap Pumping Plant (Chrisman Pumping Plant) Site Code WGPP Report status complete in progress blank Organization Department of Water Resources

ECI Completion Date SCIGN Board Acceptance Yes No Date Signed by EldonGath 6/30/99

Permit StatusWaiting EvaluatorsCPW, TKG Revision # Reason for Revision Revisions are underlined ECI Site Evaluation Summary

ECI Evaluation excellent ECI Recommendationaccept Basis for Rejectionnone or Further Assessment Recommended Percussion fair to good no Drill Rig Sky view Recommend Moving Site Estimated Remediation/Additional noneCost Recommended Site Relocation Distance

Comments Site is located on a cut pad of consolidated alluvium and requires a percussion drill.

Overall the sky view is fair to good. The surrounding Wheeler Ridge sky mask is up to 17 degrees.

Solar power and freewave radio communications will be required.

The Land Use Agreement for this site and the two other pumping plant sites in the southern are still in review by the Department of Water Resources, Division of Land and Right of Way in Sacramento. ECI and Gradient Engineers are in the process of expediting the permitting process.

Site Location Street Address 4201 Sabodan Road City Bakersfield Zip Code 93313 County Kern

Latitude 35.01076 Longitude -118.98367 UTM North 3875836 UTM East 318993 Thomas Brothers Map Del 63 5D 7.5' QuadrangleMettler Primary Contact Information (not to be web posted w/o consent of individual)

Name Len Marino Secondary Contact Information

Title Engineering Supervisor, San Joaquin Section Buena Vista Pumping Plant, 805-858-5690 Address 4201 Sabodan Road For access: Len Marino, Engineering Supervisor City Bakersfield (Wheeler Ridge) Zip 93313 805-858-5516 Phone # 805-858-5518 Robert Warner, Chief Engineer, San Joaquin Fax 805-632-3732 pager Section, 805-858-5518, 805-632-3732 pager e-mail For keys and lock arrangements: Monty Freeman, Civil Maintenance Assistant Excellent Reception 805-858-5539 805 858 5539

Site Geology and Physical Attributes WGP Present Unused open area west of the aqueduct, on an essentially level, graded pad of steeply dipping consolidated alluvial land use fan deposits of the Tulare Formation.

Earth Materials Age Type Lithology Artificial Fill Quaternary alluvium Gravel/cobble none yes maybe

Earth Materials Site overlies a graded surface composed of moderately consolidated alluvial fan deposits of the Plio-Pleistocene Comments Tulare Formation that dip ~30 degrees north. The alluvial gravels contain primarily granitic clasts.

Oil wells w/in 2km yes no Water wells w/in 2km yes no Landslides none yes

Subsidence none yes maybe Declination 14.2 deg Ground slope essentially level

Precultural none yes maybe Local drainage good fair poor surface water The site is located at the north end of the wind gap, west of the aqueduct, on a graded pad. The underlying Local Physical coarse alluvial stratigraphy is well indurated and moderately cemented. Locally, the units dip 25-40 degrees Attributes north as part of the northern limb of the Wheeler Ridge anticline. Field reconnaissance and analysis of low-altitude aerial photography of the area suggest that there are no landslides that impact the site. There ar several oil wells within about 2 km of the site. Although differential subsidence from oil and water extraction has been reported in the region, there has been no subsidence along this section of the aqueduct.

Additional The east-west-trending Wheeler Ridge anticline is located within the “Big Bend” region of the San Andreas geologic fault, along the north flank of the San Emigdio Mountains, at the boundary between the information and the San Joaquin Valley (See Additional Graphics)(Keller et al., 1998). “It is the northernmost topographic expression of the Pleito-Wheeler Ridge thrust-fault system (Davis, 1983), where active deformation is occurring simultaneously along the Wheeler Ridge thrust fault (Zepeda et al., 1986) and Pleito thrust fault (Hall, 1984) (from Keller et al., 1998).” The north-vergent east plunging Wheeler Ridge anticline is 12 km long 3 km wide and has a maximum structural relief of 500 meters. Folding was initiated around 400 ka (Keller et al., 1998). The main strand of the south-dipping White Wolf fault system strikes southwestward from the Tejon Hills across the San Joaquin Valley and merges with the Pleito-Wheeler Ridge thrust-fault system at Wheeler Ridge, 2 km northwest of the proposed GPS site. Approximately 13 miles east of the site is the epicenter location of the Ms 7.8 1952 Kern County earthquake which occurred on the White Wolf fault. Motion on the fault was reverse with a left-lateral component. The earthquake produced about 1 meter of uplift along and south of the Wheeler Ridge anticline (Stein and Thatcher, 1981). Recent tectonic geomorphic investigations of Wheeler Ridge by Keller et al. (1998) suggest the anticline is propagating eastward at a rate of ~ 30 mm/yr and is uplifting at a minimum rate of 3 mm/yr near I-5. The uplift rate at the proposed GPS site is anticipated to be less than 3 mm/yr. The wind gap where the proposed GPS site is located was formed about 60 ka when an antecedent stream was defeated by the growing anticline, forcing the stream east around the nose of the fold. The site is within 1000 feet (100 meters) of the surface projection of the Wheeler Ridge thrust. The inferred trace of the White Wolf fault is 2 miles (3.2 km) north of the site. The San Andreas fault is 12 miles (20 km) south-southwest. The Garlock fault is 13 miles southeast (22 km), on the south side of the . Sky View and Potential for Interference of Signal Sky view comments WGP Sky view fair to good Sky view is fair to good overall. Wheeler Ridge masks the southern horizons up to 17 degrees. The northeast sky mask is below 4 degrees. Trees none Low multipath environment. Fences none yes Overhead wires none yes

Site Horizon North

Objects >15 deg none

Squares above 15 deg JPEG error #62 none

Objects above 45 deg none

Objects above antenna within 3m

none

Site Horizon South

Objects >15 deg 1 ridge top

Squares above 15 deg 8 partial JPEG error #62 Objects above 45 deg none Objects above antenna within 3m none

Directions to site Access Hours to be arranged WGPP From Orange (105 miles): (see Map A) 1) Take CA-91 west for 9 miles to I-5 north. 2) Go north on I-5 for ~80 miles to CA-99. (see Map B) 3) Continue on CA-99 and go north for 3.2 miles. 4) Bear right on ramp at sign reading "CA-166 to Maricopa- Taft" and go north for 0.2 miles. 5) Follow the signs to Chrisman Pumping Plant. 6) Continue on CA-166 and go northwest for 0.8 miles. 6) Turn left on S Sabodan St and go south for 4.8 miles to the Chrisman Pumping Plant Visitors Center. 7) Check in and get an escort or a key to the aqueduct gate. (see Map C) 8) To get to the site, head north on S Sabodan St for ~0.5 miles. Turn left on “B Road”. There will be a vineyard in the northwest corner of the intersection of S Sabodan and B Road. Continue west on B Road for 1.0 mile to a rise in the road. At this point the powe lines that feed the pumping plant cross B Road. Turn left and cross over the aqueduct. After 0.1 miles veer left (southeast) and follow the main road past a couple oil pumps. Continue for 1.6 miles along the ridge, past the bee hives on the left hand side of the road, and up through the wind gap. Turn left (north) onto the access road before crossing the aqueduct at the apex of the wind gap. You will need a key for this gate. Drive north for ~1500 feet. The site is at the lowest point on the graded pad to your left, 160 feet southwest of the shed and 40 feet west of the ditch. Map to site Thomas Brothers Map Del 63 5D WGPP Site Attributes Power source solar Radio Capability yes Security good Communication sourceradio Outside Line at plant Permanence yes Telephone Carrier unknown Expected Future Changes none expected Summary of Reconnaissance This area is rattlesnake country. Watch your step. Site requires solar power and freewave radio. Gradient Engineers will need to coordinate placement of the fax/modem at the pumping plant with Robert Warner. Arvin Maintenance Yard (ARMY) ~20 miles east may also be used to receive data from WGPP. There is water at the pumping plant for drilling purposes, but not at the monument location. The are no plans to use the graded pad. A fence is not required, however, bollards should be placed around the antenna. SCIGN should contact Monty Freeman, Civil Maintenance Assistant, to arrange to have a USGS lock added to the appropriate gate.

Site plan WGP Site View In North Site View In South

Site View In West Site View In East

Site View Out North Site View Out South WGP Site View Out West Site View Out East

Additional Graphics Figure 1 from Keller, Zepeda, Rockwell, Ku and Dinklage; Active tectonic southern San Joaquin Valley, : GSA Bulletin; March 1998; v. 110 Date Received 10/26/98