Donnelly Stream Crossings and Pond Project (Lake or Streambed Alteration Agreement No. 1600-2018-0789-R1)

Donnelly Stream Crossings and Pond Project (Lake or Streambed Alteration Agreement No. 1600-2018-0789-R1)

The project is limited to four encroachments (Table 1). One encroachment is for the impoundment of water by an on-stream pond located on an unnamed tributary to the South Branch North Fork Navarro River. Water is diverted by the pond impoundment for aesthetic use and fire protection. There is no consumptive water use from the pond except emergency fire protection. One proposed encroachment is to upgrade a failing and undersized stream crossing. Work for this encroachment will include excavation, removal of the failing crossing, replacement with new properly sized crossing, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. The other two encroachments are to upgrade existing stream crossings, without proper crossing infrastructure, to culverted stream crossings. Work for these encroachments will include excavation, placement of new properly sized culvert crossings, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. The Permittee has disclosed two water wells located at approximately 39.1512, -123.3981 and 39.1514, -123.3972. The well’s potential for hydraulic connectivity to streams was not addressed in the Notification by a professional hydrogeologist licensed in the state of California and the Department has not evaluated this well. No other projects that may be subject to FGC1602 were disclosed. This Agreement does not retroactively permit any stream crossings, water diversions or other encroachments not described in Table 1.

Mendocino