Copper Mountain Route
If developed, this 3.6-mile road would connect the community of Diablo Grande to Del Puerto Canyon Road, providing Diablo Grande with an evacuation route northward to Del Puerto Canyon. From there, travelers could head either west or east on Del Puerto Canyon Road, depending on conditions.
This route would also offer residents in the Del Puerto Canyon area a southern connection to Diablo Grande Parkway, which leads to Interstate 5 and the city of Patterson. Access to this potential route from Diablo Grande would be via Panoz Court, where there is an existing gravel access road ending at Del Puerto Canyon Road.
The route would cross private property, so agreements, including access easements, would need to be negotiated with parcel owners before construction. Starting at Panoz Court, the elevation of this route is approximately 1,041 feet above mean sea level (AMSL). It peaks at 1,392 feet AMSL before descending to about 667 feet AMSL, connecting with Del Puerto Canyon Road. A map of the potential route and an elevation profile is shown in the complete version of the plan.
Mt. Oso Route
Utilizing the existing Mt. Oso Rd, this 10.5-mile route provides Del Puerto Canyon residents with access to evacuate northward, eventually connecting with Ingram Creek Rd and Interstate 5. This single-lane road is partially paved and eventually becomes a gravel road until it connects with Ingram Creek Rd near the interchange with I-5. Improvements to the existing roadway and gravel portions would need to be made, and any agreements with impacted landowners would need to be negotiated prior to construction.
Beginning at its intersection with Del Puerto Canyon Rd, Mt. Oso Rd is at an elevation of 630 ft AMSL. It climbs to a peak of 1,438 ft AMSL before eventually descending to 265 ft AMSL at Ingram Creek Rd and Interstate 5. The complete version of the plan shows a map of the potential route and an elevation profile.
Orestimba Route
The Orestimba Route utilizes the existing Oak Flat Rd beginning in Diablo Grande. It travels nearly 22 miles until connecting with Bell Rd and Stuhr Rd, providing access to Interstate 5. This route would provide an evacuation route south and east for Diablo Grande residents.
Rising sharply from elevation 1041 ft. AMSL and peaking at 1742 ft. AMSL descends to an elevation of 193 ft. AMSL at Interstate 5. Due to these elevation changes, substantial earthwork and multiple switchbacks would likely be required to make this a viable route. The complete version of the plan shows a map of the potential route and an elevation profile.
Oak Flat Route
Beginning in Diablo Grande, Oak Flat Road travels for approximately fifteen miles, connecting with Fink Rd at Interstate 5. As with the Orestimba Route, Oak Flat Rd provides a southerly escape route for Diablo Grande and surrounding areas.
Beginning at 1042 ft. AMSL, it rises sharply to 1522 ft. AMSL and descends to approximately 234 ft. AMSL at Fink Rd and Interstate 5. As with the Orestimba Route, it would most likely require substantial earthwork and multiple switchbacks to make it a viable evacuation route. The complete version of the plan shows a map of the potential route and an elevation profile.