January 16, 2026

Harness a Data-Driven Approach to Evaluate Cost, Risk and Resilience 

As wildfire and extreme weather risks intensify, utility leaders are under growing pressure to make infrastructure investments that remain defensible over the full life of their assets. Long-term performance, reliability, maintenance demands and risk exposure increasingly define the true cost of ownership. A lifecycle cost perspective enables decision-makers to assess investments based on sustained value rather than short-term spend. 

While undergrounding utility infrastructure is often viewed as cost prohibitive at the outset, that assumption can overlook meaningful long-term benefits, including reduced wildfire ignition risk, fewer outages and lower ongoing maintenance needs. Lifecycle cost analysis can provide a structured way to quantify these trade-offs. Utilities can compare alternatives based on real operating conditions and long-term system impacts rather than simplified cost comparisons. 

TRC’s Lifecycle Cost Calculator supports this game-changing analysis by integrating capital, operations and maintenance, reliability and risk-related costs over the life of the asset. By modeling multiple scenarios, our tool helps utilities align engineering, financial and risk management perspectives, strengthening capital planning decisions and regulatory defensibility. 

Learn more about the benefits in our Insight: Hardening vs. Hiding: Is Undergrounding Always the Best Wildfire and Weather Solution?  

How To Use

Toggle the sliders below to test different scenarios and see the estimated lifecycle net benefits per mile of undergrounding. Additional information specific to each category is available and can be viewed by clicking the expand icon.

Costs (Per Mile)

$

Lifecycle (Capital + O&M)

$

Costs per mile including engineering, procurement, construction, materials, permitting, and long-term maintenance. Typically for distribution (13-25kV): rural $1.5-5M, urban $5-10M; higher end reflects conversion or congested ROWs. Transmission may be higher.

$1,000,000

$10,000,000

Environmental

$

Cost per mile covering disturbance, trenching, soil disposal, and site restoration. Higher in coastal, wetland, or urban zones with complex permitting.

$50,000

$250,000

Health and Safety

$

Worker injury risk, community disruption, traffic control, and safety compliance normalized per line mile. Based on OSHA recordable-rate valuation; higher for dense urban construction.

$10,000

$75,000

Benefits (Per Mile)

$

Improved Reliability (CAIDI Minutes Reduced)

Customer Average Interruption Duration Index (CAIDI) minutes reduced from avoided outage cost from reduced frequency/duration. Reliability benefit has been calculated based on a generalized average case of DOE’s ICE calculator with set assumptions. Customers per line mile set at 75 per PH Larson Et Al 2016. Residential customers assumed to be in a 7:1 ratio with C&I customers based on investor owned utility and large co-op and municipality averages. 40-year asset life and 6% discount rate assumed.

0

200

Storm / Wildfire Risk Reduction

$

Benefit per mile from avoided asset loss, fire suppression cost, and liability. For high-hazard or Wildfire Threat Districts (CPUC Tier 2/3); could be parameterized as % of capital cost (5-20%).

$100,000

$1,000,000

Aesthetic / Property Value

$

Benefit per mile from visual improvement, reduced vegetation maintenance, and property value uplift. Highly qualitative; consider 1-5% property-value gain in residential areas.

$10,000

$250,000

O&M Savings

$

Benefit per mile from reduced vegetation management, inspection, and storm repair. Underground O&M ~30-50% lower than overhead, though fault repair higher.

$20,000

$300,000

Net Benefit (Per Mile)

$

Explore Your Options with TRC 

Hardening reduces risk. Undergrounding redefines it. Let’s help you find the solution that fits your system and your future.

Contact TRC to begin a site-specific strategy session.

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