3. Project Plans.pdf

This document is a set of construction design and engineering plans for the Ash Creek Helispot Phase 1 project, located within the Shasta-Trinity National Forest in California's Pacific Southwest Region 5.

The project encompasses the development of a helicopter landing facility with associated infrastructure improvements. Key work items include site preparation and grading (6,980 cubic yards of excavation and recompaction), placement of compacted engineered fill and aggregate base materials, construction of reinforced concrete pavement with 6-inch minimum thickness and Type II mix design, and installation of 24-inch minimum depth asphalt pavement. Supporting infrastructure requirements include water line construction with 3-inch PVC piping, electrical and communications duct installation, utility connections with specific valve and fitting specifications, fire hydrant and water system components, and subsurface conduit systems. The plans specify site sections detailing soil preparation requirements including scarification and recompaction of existing materials, grading to elevation 3675-3677 feet depending on section location, and minimum 12-inch overexcavation limits beneath finished surfaces. Construction standards require compliance with California Specifications for aggregate base materials and specific testing procedures for compaction verification using ASTM D1557 and D2435 methodologies. The project includes detailed specifications for water line materials and connections, electrical service requirements, fire suppression systems with Mueller 2.5-inch and 3-inch check valve assemblies, and drainage considerations. Nine sheets of design plans are provided, including survey control, grading and paving layouts, site section details, utility routing, miscellaneous technical details, and power company underground requirements documentation.