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Beltz 10 Aquifer Storage and Recovery & Beltz 11 Well Injection Pilot Tests

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State & Local

Contract Overview

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AI Contract Overview

The City of Santa Cruz Water Department is conducting a pilot test at its existing Beltz 10 and Beltz 11 well facility to evaluate the feasibility of aquifer storage and recovery and well injection as a means to store excess surface water in the Santa Cruz Mid County Groundwater Basin. The project involves modifying both wells for integration with the municipal distribution system, including downhole cleaning, pump adjustments, and installation of necessary appurtenances. A new 2.5-inch diameter monitoring well will be installed at the Beltz 10 facility using direct rotary drilling with bentonite-based fluid, with all waste material hauled offsite. This monitoring well, equipped with a vault and manhole, will collect data on water levels and quality throughout the pilot period, which is expected to last up to 150 days between 2026 and 2027. All construction will occur during weekday business hours from 8 a.m. to 5 p.m. to comply with local noise ordinances, and limited tree limb removal will be performed only as needed for drill rig access. The ASR pilot at Beltz 10 will involve three staged injection and recovery cycles, beginning with a recovery of 0.44 million gallons, followed by 3 million gallons, and potentially up to 13 million gallons in the third cycle if water quality results from the first two cycles are favorable. Water from the first two cycles will be discharged to an unnamed creek via the raw water pipeline, while water from Cycle 3, if approved, will be treated at the Beltz Water Treatment Plant and introduced into the distribution system. The Beltz 11 injection pilot will involve two to three cycles injecting up to 10 million gallons total, with water levels monitored at an existing well to assess aquifer response. Discharges from well development are managed based on turbidity levels, with high-turbidity water directed to the treatment plant reclaim tank and low-turbidity water routed to the creek. The results of these tests will inform the design and permitting of a potential long-term, full-scale ASR system. Environmental compliance is governed by CEQA Class 1 and Class 6 categorical exemptions, with all activities constrained to the existing facility footprint and no expansion permitted. No formal procurement structure, contract value, or contractor selection criteria are outlined, indicating this is an internally managed feasibility study.

General Info

Pilot ASR test at Beltz wells to store excess water, monitor aquifer response, inject up to 13M gallons, comply with CEQA exemptions, 2026–2027.

Agency

California → City of Santa Cruz

NAICS

237990 - Other Heavy and Civil Engineering ConstructionView NAICS

Place of Performance

34th Ave and Roland Drive, CA, 95062

Set-Aside

NONE

Documents

(1)

Santa Cruz Beltz 10 ASR and Beltz 11 Well Injection Pilot Tests Notice of Exemption

PDF•notice-of-exemption

AI Contract Breakdown

Uniform Contract Format

Timeline

PostedJan 5

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Organization & Contact Information

AgencyCalifornia → City of Santa Cruz

Contacts1 person available

OfficeN/A

Organization / Agency

California → City of Santa Cruz

Office AddressN/A

Contacts

Heidi LuckenbachWater Director

contact@example.gov

+1 (555) 000-0000

Full Description

The City of Santa Cruz Water Department is seeking to pilot test aquifer storage and recovery and well injection at its existing Beltz 10 well facility, which has two wells on site, Beltz 10 and Beltz 11, as part of a feasibility study to assess the viability of diverting excess surface water to the Santa Cruz Mid County Groundwater Basin. The Beltz 10 pilot test requires installing a monitoring well at the City's existing Beltz 10 well facility. The pilot testing is expected to last up to 150 days from 2026 to 2027. The City of Santa Cruz Water Department is seeking to pilot test aquifer storage and recovery (ASR) and well injection at its existing Beltz 10 well facility, which has two wells on site, Beltz 10 and Beltz 11 , as part of a feasibility study to assess the viability of diverting excess surface water to the Santa Cruz Mid County Groundwater Basin. The Beltz 10 well facility is shown on figure one. The ASR pilot testing of the Beltz 10 well seeks to field demonstrate the potential application of ASR in the in the A/AA unit Purisima Aquifer system. A new monitoring well will be installed as part of this work. The injection pilot testing of the Beltz 11 well seeks to investigate the potential to raise water levels in the Tu aquifer. The pilot testing results will be used to assess viability of the storage of drinking water underground at the Beltz 10 well facility and will provide the basis for the design and permitting for a long-term full-scale ASR and/or well.injection project. Preparation of Beltz 10 and Beltz 11 wells for pilot testing will include downhole cleaning procedures and modifications to the wells to establish a connection to the distribution system, retain or exchange pumps and add appurtenances. The ASR pilot test at Beltz 10 requires installing a monitoring well at the City's existing Beltz 10 well facility. This new monitoring well will be used to collect water level and water quality data. The monitoring well will be 2.5 inches in diameter. Drilling will be performed using the direct rotary method with bentonite-based fluid, which will be hauled offsite for disposal. Higher turbidity discharges from well development will be routed to the to the Beltz Water Treatment Plant (Beltz WTP) reclaim tank, which drains to the sanitary sewer system. Lower turbidity discharges from well development will be routed via the existing raw water pipeline to the unnamed creek at 30th Ave, a tributary to Moran Lake. A monitoring well vault and manhole will be installed to provide access for instrumentation, monitoring, or sampling. All construction activities will occur during working hours Monday through Friday 8am to 5pm consistent with County noise ordinance requirements. Construction of the monitoring well will require 12 working days. Some tree limbs will be required to be removed to allow the drill rig to access the site. The ASR pilot test at Beltz 10 will involve three repeated injection storage and recovery cycles with increasing quantities of water. Cycle 1 is expected to recover about 0.44 million gallons (mg). Cycle 2 is expected to recover about 3 mg. Water from Cycles 1 and 2 will be routed via the existing raw water pipeline to the unnamed creek at 30th Ave, a tributary to Moran Lake. Cycle 3 injection operations, if water quality pilot testing results from Cycles 1 and 2 are favorable, will result in the recovery of 13 mg that will be treated at the Beltz WTP will go into the distribution system. Water levels will be monitored after recovery. The injection pilot test at Beltz 11 will involve two repeated injection storage and recovery cycles at with increasing quantities of water extracted after injection. Cycle 1 is expected to recover about 0.1 million gallons (mg). Cycle 2 is expected to recover about 1 mg. Cycle 3 injection operations, if water quality pilot testing results from Cycles 1 and 2 are favorable, will result in the storage of 10 mg. Water levels at an existing monitoring well will be monitored to assess the response to injection at Beltz 11. Noise typical of existing operation noise will occur during pilot testing. The pilot testing is expected to last up to 150 days from 2026 to 2027.