Integrated Resource Plan

Project Specifications

Client: Truckee Donner Public Utility District

Location: Nevada County

Services: Energy Resource Planning & Utility Analysis

Aspen is part of a two-firm team developing the first ever Integrated Resource Plan for the public utility district in Truckee, California. Aspen is providing overall leadership, support to resource contract negotiations, and developing the forecast of district electricity consumption. Truckee is a unique mountain community located on the major east-west interstate traffic route through the Sierra Nevada, known for both summer and winter recreation. As such, a large percentage of homes are occupied only part-time, and both the forest and snow load mean rooftop solar is not an option for most homeowners. Aspen used automated meter data to develop a monthly and hourly forecast of load by customer class (almost entirely residential and small commercial). The load forecast is an input to a resource model, to which Aspen also provides insight into the resources to consider and scenarios to offer for public review. Another consideration is electric vehicle (EV) load: small EV charging stations require as much as 4 MW of capacity to charge vehicles. Several charging stations exist already and Aspen is projecting how many stations the District should add to allow residents, visitors and potentially even large electric trucks interstate-bound to charge during winter when batteries are less efficient. The Aspen Team will be presenting its results in late 2023.