A state-ordered analysis of engineering plans for the Tysons tunnel has blasted the multimillion-dollar independentproposal as incomplete, charging that the document lacks critical details supporting arguments on costs and schedule.

Fort Worth, Texas-based Carter & Burgess prepared the analysis at the request of Virginia officials after the release of the engineering study from Tysonstunnel.org. The group delivered the documents earlier this year in an effort to convince officials to resurrect the tunnel.