Hope Valley Restoration and Aquatic Enhancement (Lake or Streambed Alteration Agreement No. 1600-2020-0082-R2)
1 Documents in Project
Summary
SCH Number
2020060469
Public Agency
California Department of Fish and Wildlife, North Central Region 2
(CDFW)
Document Title
Hope Valley Restoration and Aquatic Enhancement (Lake or Streambed Alteration Agreement No. 1600-2020-0082-R2)
Document Type
NOE - Notice of Exemption
Received
Posted
6/23/2020
Document Description
Project Site 1: Restoration techniques will mimic an abandoned oxbow feature by excavating an approximately 2.5ft deep by 14ft wide trench behind a failing riverbank and filling it with live sod blocks, willow stakes, and live shrub transplants. The trench construction will avoid disturbance of mature vegetation and will maintain a minimum 3 to 4ft setback from the top of the riverbank. Approximately 500 cubic yards of soil will be excavated and hauled off-site. Meadow sod blocks will be salvaged prior to excavation and reinstalled over the side slopes and bottom of the excavated floodplain bench during the revegetation phase. A temporary irrigation system will be installed to minimize plant stress and erosion by means of slow water delivery with low impact nozzles. The irrigation system will remain in place until November 15. The work at Project Site 1 will temporarily impact approximately 0.14 acre of palustrine wet meadow and 0.01 acre of riverine habitat. Project Site 2: The restoration work’s primary focus at Project Site 2 is to update previous restoration work by providing additional stability to divert stream energy from scouring behind the current log crib structure. This will be accomplished by installing slash to the ends of the reach. Slash will consist of locally-sourced conifer and willow cuttings and will be weaved in between vertically-placed 8in x 10ft slash anchor logs. The slash anchor logs will be embedded 7ft into the ground using an auger to drill 8in holes for placement. Live willow stakes, installed down to or near groundwater, will also be placed vertically within the end of reach project areas. Live stakes will be installed along the reach at an average spacing of 5ft. The ends of the reach will be regraded slightly to maintain stable bank conditions and facilitate placement of slash anchor logs. Approximately 9 cubic yards of soil will be excavated during the bank regrading. Excavated soil will be dispersed in adjacent upland areas. Soil dispersal will not exceed a depth of 6in. Soils will be hand raked to further disperse material. The work at Project Site 2 will temporarily impact approximately 0.01 acre of riverine habitat.
Contact Information
Name
Gabriele Quillman
Agency Name
California Department of Fish and Wildlife
Contact Types
Lead/Public Agency
Phone
Name
Agency Name
Alpine Watershed Group
Contact Types
Project Applicant
Location
Coordinates
Counties
Alpine
Regions
Northern California
Waterways
W Fork Carson River
Township
11N
Range
18E
Section
25
Base
MtDiablo
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 4(d); California Code of Regulations, title 14, section 15304
Reasons for Exemption
under Class 4(d) because it consists of minor alterations in the condition of land, water, and vegetation in an existing officially-designated wildlife area (Hope Valley Wildlife Area) which will result in improvement of habitat for fish and wildlife resources. No trees will be removed.
Attachments
Notice of Exemption
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