Jellison 101 Farms Stream Crossings, Restoration, Pond, and Water Diversions Project (Lake or Streambed Alteration Agreement No. 1600-2019-0236-R1)
378 Documents in Project
Summary
SCH Number
2016112028
Lead Agency
Mendocino County
Document Title
Jellison 101 Farms Stream Crossings, Restoration, Pond, and Water Diversions Project (Lake or Streambed Alteration Agreement No. 1600-2019-0236-R1)
Document Type
NOD - Notice of Determination
Received
Posted
2/11/2021
Document Description
The project is limited to 14 encroachments (Table 1). Three encroachments are for water diversion
from unnamed tributaries to Tenmile Creek. Water is diverted for domestic use at PODs 2 & 3 and irrigation at the onstream pond (POD-1). CDFW could find no records of water rights associated with diversions at POD-2 and POD-3. Work
for the water diversion will include use and maintenance of the water diversion infrastructure. If diversion infrastructures
are inconsistent with the measures in this Agreement, then then they shall be removed or modified, and the Permittee
shall install new water diversion structures consistent with this Agreement. One of the water diversions is from an existing
on-stream pond and the other two are spring diversions. The diversion at POD-3 is equally split between the Permittee
and a neighbor. The Permittee and all other water users shall cooperate with the POD owner to achieve compliance in a
coordinated fashion.
The on-stream pond diversion encroachment also includes the proposed reconstruction of the dam and spillway for the
on-stream pond. The spillway culvert is undersized and improperly installed with a bend in the middle of the dam. The
dam is also showing signs of failure and will be reconstructed when the new spillway culvert is installed. Currently, the
sloped road west of the dam drains runoff directly onto the dam face, draining over the downstream edge. This has led to
seasonal saturation on the top of the dam surface/road, as well as surface erosion of the outer face of the dam. A
drainage dip will be installed just to the west of the dam surface to direct road runoff downhill towards the new culvert
outlet rather than over the dam face. Work for this encroachment will include draining the pond, excavating the dam,
removal of the undersized culvert, replacement with new properly sized culvert with no kinks or bends, backfilling and
mechanical compaction of fill, and rock armoring as necessary to minimize erosion. Construction activities for this
encroachment shall not commence until the Dam Reconstruction and Design Plans are reviewed and approved by
CDFW.
Six proposed encroachments are to upgrade failing and undersized stream crossings. Work for these encroachments will
include excavation, removal of the failing culverts, replacement with new properly sized culverts, backfilling and
compaction of fill, and rock armoring as necessary to minimize erosion. Two proposed encroachments are to rock armor
existing stream crossing culverts as necessary to minimize erosion.
One encroachment is for culvert removal, stream restoration, and revegetation on an unnamed tributary to Grub Creek
(STX-6). An undersized culvert is located on a legacy road that is no longer in use. In-stream work for this encroachment
will include excavation and removal of the unpermitted culvert. Stream restoration activities such as bank stabilization,
grading, channel clearing and revegetation are proposed to return the channel to natural conditions using an undisturbed
upstream reference reach as a guide. Construction activities for this encroachment shall not commence until the Stream
Restoration Plan and Revegetation Plan are reviewed and approved by CDFW.
To: From:
Office of Planning and Research Department of Fish and Wildlife
For U.S. Mail: Northern Region
P.O. Box 3044 619 Second Street
Eureka, California 95501
Sacramento, CA 95812-3044 Contact: John Herrera
Street Address: Phone: 707-962-9044
1400 Tenth Street
Sacramento, CA 95814 Lead Agency (if different from above)
County of Mendocino
860 N. Bush Street
Ukiah, CA 95482
Contact: Mary Lynn Hunt
Phone: 707-234-6650One encroachment is for a stream crossing upgrade and improvement (STX-9) with two components, 1) an existing
stream crossing that has diverted a stream out of its natural channel will have a new culvert installed; and 2) a unused
legacy road directly below the stream crossing and lacking any stream crossing infrastructure will be restored to its
natural contours and the disturbed area will be revegetated. At the stream crossing site on the main road, the stream
does not cross the road but enters an inboard ditch and flows downhill into a projecting ditch relief culvert (DRC). Flow out
of the DRC has eroded an incised ditch that flows roughly 60 feet before meeting up with original channel. A new culvert
will be installed in line with the stream channel at the site of the stream crossing to disconnect flow from the ditch. Below
the new crossing on the legacy road, the fill will be removed, and the stream channel will be restored, re-vegetated, and
recontoured as close to the original condition as possible. Work for the second component will include excavation and
removal of the fill. Stream restoration activities such as bank stabilization, grading, channel clearing and revegetation are
proposed to return the channel to natural conditions using an undisturbed upstream reference reach as a guide.
Construction activities for this encroachment shall not commence until the Stream Restoration Plan and Revegetation
Plan are reviewed and approved by CDFW.
The final encroachment (DRC-2) is to remove a ditch relief culvert that has become hydrologically connected to a nearby
stream and to disconnect the contributing inboard ditch. The culvert will be replaced with an out-sloped rock-lined dip. The
associated inboard ditch will be filled, and the road will be out-sloped. A second out-sloped rock-lined ditch will be
installed on the road 150 ft uphill of the first dip. Work for this encroachment will include, excavation, removal of the ditch
relief culvert, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion.
Project activities at all stream crossings and the on-stream pond shall require pre-construction surveys by a Designated
Biologist if surface water is or becomes present during construction.
Contact Information
Name
John Herrera
Agency Name
CDFW
Contact Types
Responsible Agency
Address
Phone
Location
Cities
Laytonville
Counties
Mendocino
Regions
Northern California
Other Location Info
The project is located within the Tenmile Creek watershed, approximately 7.6 miles northwest of the
town of Laytonville, County of Mendocino, State of California; Section 7, T22N, R15W, Mt. Diablo Base and Meridian, in
the Tan Oak Park U.S. Geological Survey 7.5-minute quadrangle; Assessor’s Parcel Number 013-540-46; latitude
39.7716 N and longitude 123.5762 W at the first point of diversion (POD1).
Notice of Determination
Approving Agency
CDFW
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Mendocino
Final Environmental Document Available at
County of Mendocino
860 N. Bush Street
Ukiah, CA 95482
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. For more information, please visit OPR’s Accessibility Site.