Permanente Creek Restoration Project (File PLN17-2250)

Project Description:

Lehigh submitted a Grading Approval application for the Permanente Creek Restoration Project (PCRP) on November 2, 2017. The PCRP would restore and modify specific segments of Permanente Creek located within and outside of the existing Reclamation Plan boundary for Lehigh Permanente Quarry. The proposed PCRP includes the following significant modifications:

  • Removal of non-native species, installation of native vegetation, and preservation of existing native vegetation;
  • Removal of concrete road segments, tractor tires, imported sediment, 260 linear feet of culverts in the channel widening area, 960 linear feet of culverts in the Rock Pile Area, and retired Rock Plant conveyor system;
  • Construction of floodplain bench areas with habitat elements and reduction of access road width;
  • Construction of new channel with floodplain bench areas;
  • Removal of overburden/fill, and a relic concrete structure;
  • Re-alignment of the centerline of Permanente Creek to the north, which will push the toe of the restored streambank approximately 25 feet northward, except near Pond 4A where it will move 16 feet northward.

Project Status

Lehigh’s proposed PCRP is currently undergoing environmental review through the preparation of a Supplemental Environmental Impact Report (SEIR). The County is currently in the process of finalizing the scope and bid of the SEIR. Once the scope and bid have been finalized, the County will prepare and circulate a Notice of Preparation (NOP) and post the NOP to the project website. The County provides periodic updates to interested members of the community. If you are interested in receiving information from the County about this project, please consider signing up to be added to the Lehigh Interested parties list​.

Project Materials


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