Aspen prepared an EIR for PG&E Company's proposed construction of a new 27-mile 230 kV transmission line from the Jefferson Substation (in San Mateo County) to the Martin Substation in the City of Brisbane.

Aspen was presented with the 2004 Award for Outstanding Environmental Analysis Document by the Association of Environmental Professionals (AEP) for the Jefferson-Martin 230 kV Transmission Project Final EIR. This award recognizes the hard work of Aspen and the CPUC in preparing detailed alternatives analysis, extensive public outreach, and high quality document production. The jury said that, "the Jefferson-Martin 230 kV Transmission Line Project EIR provides a model for thoroughness and clarity in the preparation of a CEQA document. The document is extremely well-organized, with a precise and concise narrative supported by excellent graphics. The mitigation measures, in particular, are extremely well-crafted, and cumulative impacts are carefully enumerated."