## [[Risk Action Plan]] ### [[Risk Description|Description]] Due to a discrepancy between the specified incoming utility voltage (13.8kV) and the actual service voltage at the site (12.47kV), there is a threat that the electrical switchgear and transformer specifications may require redesign, which may lead to equipment procurement delays and additional engineering costs. > [!abstract]- Risk Analysis — Key Assumptions & Current Controls (click to expand) > > **Key Assumptions:** > - The original electrical design was based on 13.8kV service voltage per the utility interconnection information provided during the feasibility phase; however, a field verification request to the utility revealed the actual distribution system serving this facility substation is 12.47kV. > - The main switchgear specified in the 60% design documents is rated for 15kV class service (covering both voltages) and does not require replacement, but the primary transformer taps and relay settings must be revised. > - The voltage discrepancy was identified during Star Road Engineering's 90% design self-check; it is not yet reflected in the issued-for-construction documents. > - A 6-week minimum lead time is required to obtain revised transformer tap changer specifications from the manufacturer, which falls on the critical path for equipment procurement. > > **Current Controls:** Star Road Engineering has issued a design hold notice on the transformer procurement package pending resolution of the voltage discrepancy. [[Yoshi]] has submitted a formal data request to the utility for written confirmation of the actual service voltage and available fault current at the delivery point. > [!abstract]- Sources of Information & References (click to expand) > > **Sources:** > - [[EXHIBIT C - General Conditions]] > > **Attachments:** > - None ### [[Risk Mitigation Strategy]] Avoid the consequence of a procurement delay by resolving the voltage discrepancy and issuing corrected specifications before the transformer procurement package is released for bidding. [[Yoshi]] is to obtain written utility service confirmation, direct Star Road Engineering to revise the transformer specifications to the correct voltage, and issue a design change order within 3 weeks. The specification revision is a well-defined engineering task with low technical uncertainty — the primary risk is delay in obtaining the utility's written service confirmation, which must be actively managed. ### Possible Additional Actions - Escalate the utility data request to EPIC Water Authority's utility liaison contact, who may be able to facilitate a faster response than a direct design team inquiry. - Confirm with the switchgear manufacturer that the 15kV class rating of the specified equipment is compatible with 12.47kV service and that no equipment substitutions are required beyond the transformer tap revision. - Issue a schedule impact notification to EPIC Water Authority documenting the delay to the transformer procurement package and the expected recovery timeline once corrected specifications are issued. - Review all other voltage-sensitive equipment in the specification package (motor protection relays, voltage regulators, VFD input ratings) to confirm no other items are affected by the 12.47kV service voltage. ### Comments & Recommendations This discrepancy was caught during design self-check before equipment was procured — a positive outcome. The consequence is rated "high" because the transformer is a long-lead critical path item; any delay to its procurement directly extends the project schedule. Star Road Engineering's design hold was the correct response. The fastest path to resolution is EPIC Water Authority facilitating the utility's written service confirmation, which should be the primary focus of [[Yoshi]]'s next steps. ### Status - [ ] [[2026-03-05]] ^status-2026-03-05 - 🟡 **Utility Confirmation Pending:** The regional utility provided verbal confirmation of 12.47kV service on February 28 but has not yet issued written documentation; [[Yoshi]] is following up for the formal letter required before the transformer specification revision can be finalized. - ⏳ **Specification Revision:** Star Road Engineering has drafted the revised transformer tap specification for 12.47kV service; final issue is on hold pending receipt of the utility's written service confirmation letter. - [ ] [[2026-02-05]] ^status-2026-02-05 - 📊 **Switchgear Confirmation:** Switchgear manufacturer confirmed in writing that the 15kV class rating of the specified main switchgear is fully compatible with 12.47kV service with no equipment changes required — only transformer tap settings are affected. - 🟡 **Relay Review:** Star Road Engineering completed review of all voltage-sensitive relay settings; three motor protection relays require revised settings for 12.47kV service, which can be addressed in a single specification revision alongside the transformer corrections. > [!abstract]- Status History (click to expand) > > - [x] [[2025-12-01]] Voltage discrepancy identified during Star Road Engineering 90% design self-check — specified service voltage of 13.8kV does not match the 12.47kV distribution system confirmed through field inquiry. Design hold issued on transformer procurement; utility data request submitted. Risk added to register. ^status-2025-12-01