The study team worked collaboratively with partner agencies, stakeholders, and the public to apply a systematic alternative screening process. The process was designed to identify those concepts that best satisfy the study’s Purpose and Need and warrant additional study, while eliminating under-performing concepts. For this study, the process was broken down into three (3) screening levels. Those concepts that remained at the end of each consecutive level underwent increasingly rigorous analysis to determine which concept(s) best suited the Purpose and Need identified at the beginning of the study while minimizing environmental impacts. The end result was a preferred alternative that was thoroughly evaluated for environmental impacts and possible mitigation measures. The preferred alternative, its impacts, and associated mitigation measures will then be described in detail within the Environmental Impact Statement (EIS). Click here to see an illustration of the screening process.  Below is a summary of the three levels of alternative screening.

Level 1 Screening

The first level of screening considered concepts in the entire study area.  Many of the concepts were taken from the 2001 Pyramid Corridor Management Plan and reconsidered alongside new concepts. The analysis consisted of qualitative Purpose and Need and fatal flaw analysis. System, transit, and lane type alternatives were considered in addition to roadway concepts. A total of thirty-four alternatives were considered and the results summarized in the Level 1 Screening Matrix. The roadway concepts are illustrated and summarized here.

Level 2 Screening

The second level of screening was broken into two parts; Level 2A and Level 2B. The intent was to further reduce the number of feasible concepts in Level 2A through general traffic and environmental analysis so there remained a manageable number of concepts in Level 2B to apply conceptual engineering, more detailed traffic and environmental analysis. Level 2 focused solely on roadway concepts totaling eight in Level 2A and two in Level 2B. Click here to see the Level 2A Screening Matrix and here to see the roadway concepts illustrated and summarized. The Level 2B Screening Matrix can be found here.

Level 3 Screening

Using the results of the Level 2 screening process, Level 3 focused on different alternatives of the remaining general roadway concept (H17). That concept being a conversion of Pyramid Highway to a freeway from Eagle Canyon/La Posada south and connecting to an east/west freeway that ultimately interchanges with US 395 at or near Parr Boulevard. The alternatives focused on system interchange locations with US 395, interchange and crossing locations in the Sun Valley area, freeway alignment options in the Pyramid Highway corridor south of Sparks Boulevard, and interchange configuration between Dolores Drive and Eagle Canyon/La Posada. The Level 3 roadway alternative screening process summary can be found here. In addition to roadway alternatives, supplemental alternatives that were carried forward from Level 1 screening were considered and further screened as well.

DEIS Alternatives

The various options that resulted from the Level 3 Screening process were packaged into a series of four distinct alternatives for analysis in the Draft EIS document. The various concepts could be mixed and matched to create other alternatives; however, the four were assembled to provide a reasonable yet manageable range of alternatives and resulting impacts. The four alternatives were as follows:

  • Alternative 1: US 395 interchange at Parr Boulevard, at Sun Valley Boulevard Interchange, northern Sun Valley crossing, off-alignment at Pyramid, expansion/extension of existing Disc Drive, a Pyramid Freeway from Sparks Boulevard to north of Eagle Canyon/La Posada, widening of Pyramid to Calle de la Plata, and of Pyramid from Disc Drive to Queen Way.
  • Alternative 2: US 395 interchange at Parr Boulevard, at Sun Valley Boulevard Interchange, southern Sun Valley crossing, on-alignment at Pyramid, expansion/extension of existing Disc Drive, a Pyramid Freeway from Sparks Boulevard to north of Eagle Canyon/La Posada, widening of Pyramid to Calle de la Plata, and of Pyramid from Disc Drive to Queen Way.
  • Alternative 3: US 395 interchange at Parr Boulevard, West of Sun Valley Interchange, southern Sun Valley crossing, ridge-alignment at Pyramid, expansion/extension of existing Disc Drive, a Pyramid Freeway from Sparks Boulevard to north of Eagle Canyon/La Posada, widening of Pyramid to Calle de la Plata, and of Pyramid from Disc Drive to Queen Way.
  • Alternative 4: US 395 interchange at Parr Boulevard, West of Sun Valley Interchange, northern Sun Valley crossing, on-alignment at Pyramid, expansion/extension of existing Disc Drive, a Pyramid Freeway from Sparks Boulevard to north of Eagle Canyon/La Posada, widening of Pyramid to Calle de la Plata, and of Pyramid from Disc Drive to Queen Way.

Detailed maps of these alternatives that were evaluated in the Environmental Impact Statement can be found on the Draft EIS page.