OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 00927
PWS Name: TIDEWATER GRANGE DIST IMP CO
 
Who Was Contacted: Christopher Morton
Contact Phone: 541-270-5702
Contact Date: 08/08/2022
Contacted By: CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location: Field
 
Assistance Type: CIRCUIT RIDER ASSISTANCE
 
Details: Background/Problem Identification:
The circuit rider was contacted by Daniel Hough of OHA and was requested to assist the Tidewater Corporation water system with either developing their existing spring collection site into a groundwater source, or by assisting in providing guidance in upgrading the spring source to include a treatment system that is compliant with OHA’s new OVS classification.

Assistance Provided:
The circuit rider visited the water system on 08/12/22 to assess the spring source and the potential to develop it into a groundwater (non-GWUDI) system. The spring source as explained by Chris Morton was a 55 gallon plastic drum, perforated and filled with gravel, with the pipe intake bulkhead mounted to the barrel. The barrel was buried underneath what is now a small pond that appears to be formed by damming a large ravine with rock. The appearance and location of the “spring” was more likely an impoundment on an existing small creek.

The circuit rider does not recommend trying to develop this spring without a secondary source in place. There is inherently a risk of losing the spring when trying to chase it back via excavation or finding out that it is simply an impoundment on a surface water creek.

We recommend installing treatment to meet the requirements of the new OVS regulations. More specifically, the water system could install UV and residual maintenance disinfection to comply. The UV system shall meet NSF Standard 55, and be Class A. The Viqua Pro30 UVMax system would satisfy the OVS treatment requirement. We recommend a 30 gpm unit be installed with a flow restrictor to limit the flow to <30 gpm.

Residual maintenance disinfection can be achieved using a flow-paced dosing pump/meter such as the Stenner Econ-FP series system. We recommend a small mixing tank be in place after the injection point to allow for mixing of the pulsed injections.

Follow-Up Actions Needed:
The circuit rider is available to assist further if needed.

Technical Re

More information for this water system: SDWIS ID 2022
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