Flashcards in Willits Bypass Deck (129):
Listed fish in Little Lake Valley
State threatenedSouthern Oregon Northern California Coast Coho Salmon
areas temporarily affected by onsite or offsite construction activities that would be returned to pre-project conditions
Outlet Creek tribs supporting anadromous fish
Category I Riparian Corridor
- Where anadromous fish are known to occur- Provide designated critical habitat- Extend 100 feet from OHWM
Catergory II Riparian Corridor
- Vegetated areas 1000 upstream from confluence with Category I stream- e.g., Fulweiter Creek- Extend 50 feet from OHWM
Category III Riparian Corridor
- Tribs to Category I greater than 1,000 ft from the confluence- Extend 25 feet from OHWM
Term used for non Category I, II, or III riparian corridors
other riparian woodlands
Mixed Scrub Riparian constituents
Generally lacks herbaceous layercoyote bush (baccharis pilularis)poison oak (Toxicodendron diversilobum)california rose (rosa californica)Himalayan blackberry (Rubus armeniacus)blue elderberry (Sambucus cerulea)arroyo willow
2 kinds of marsh community
Mixed MarshTule Marsh
Where mixed marsh occurs
Internally drained basins and low lying troughs in northern portion of valleyQuail Meadows area
enhancement of an existing sensitive biological resource
4 types of oak
how temp impact area was calculated
3 m beyond perm fill line
Permanent Impacts to wetlands and other waters
Temp project impacts
Mitigation impacts (temp) wetlands and other waters
Most extensive wetland type in valley
Viaduct temp impact area
100 feet east, 50 feet to the west
"wetlands in the project vicinity carry out three general hydrologic functions",- groundwater recharge- groundwater discharge- floodflow alteration"
wetlands in the vicinity carry out three general biogeochemical functions""
a measure of the total concentration of dissolved substances
wetlands in the project vicinity carry out three general flora and fauna habitat support functions""
- wildlife habitat diversity- connectivity of wetland wildlife corridors- aquatic habitat diversity
Overall goal of the mitigation program""
To compensate for unavoidable impacts on sensitive biological resources resulting from bypass project construction by improving the valley's ecological functions and values through a combination of habitat re-establishment
What was used to develop the mitigation program?
A watershed approach with a nexus to the sediment and temperature TMDL for the Upper Main Eel River and tributaries.
The Project's key to compliance with the TMDL is dependent upon the following" four things"
1. Collection of baseline stream temperature data2. Implemenation of a successful riparian mitigation plan3. Aseessing and rehabilitating existing erosion sites4. Developing an effective grazing plan
Why is baseline stream temperature data being gathered?
To draw correlations between stream temperatures and the removal, reestablishment, establishment, and rehabilitation of riparian vegetation
Post-Mitigation wetland establishment
Conceptual Watershed ModelProject objectives--Watershed needs for LLV--aka, the mitigation presumptions""
What is meant by beneficial hydrology?""
Both water quality and quantity
Most of the hydrological disruption in LLV is attributed to:
Conceptual Watershed ModelMitigation categories and practices
the following actions are expected to help address the effects of ongoing stream maintenance and traditional grazing" (4)"
Conceptual Watershed Modelaquatic resource types
Conceptual Watershed ModelWatershed attributes
Conceptual Watershed Modelassessment criterion
Sustain and improve the functioning of aquatic resources watershed profile""
what is a watershed profile?""
a tabular account of the abundance
The conceptual model will support a determination that the unavoidable loss in current acreage of wetlands will be offset with future:""
federally-listed fish species in Outlet Creek
Chinook salmon and steelhead
Post-mitigation riparian establishment
North and South Fork of Ryan Creek. Which fish passage project is getting built?
South fork. North fork only designed
post-mitigation riparian rehabilitation
post-mitigation wetland rehabilitation
Mill Creek Monitoring StationsAlignment Footprint
Parcels with high-quality riparian and oak habitat
Old Outlet Creek Monitoring StationsAlignment Footprint
Parcels with high-quality wet meadow wetlands
most abundant wetland type in LLV
Construction Water quality monitoring StationsNew alignmentUp and DownEast Haehl Creek
Creeks where fish passage is planned
Construction Water quality monitoring StationsUp and DownNew alignmentHaehl Creek
existing resources will be actively managed to prevent a decline in condition
Resources protected by conservation easement on parcels where mitigation actions are proposed.
Where is the Niesen Parcel
West of Old Outlet Creek at southern end of Quail Meadows Interchange
Baechtel Creek Construction Monitoring StationsAlignment Footprint
6 and 710
Outlet Creek Construction Monitoring StationsAlignment Footprint
3 listed fish species found in Outlet Creek
2 types of groundwater aquifers supporting wetlands in LLV
Groundwater elevations may fluctuate seasonally from ____ to ____ feet
5 to 15
Seasonal fluctuations in groundwater level result primarily from, and secondarily from
Where were groundwater wells installed in the bypass area? Why?
- 20 wells in semaphore grass habitat (8 wet meadow, five riparian, 7 upland) - wet meadows in the haul road alignment- to determine whether project impacts from the haul roads would be temporary, as expected, or permanent
Type 1wetland rehab
Passive successional developmentWatson West, and some of Watson EastAlready wetland in good condition(> 60% of target wetland sp)
Where were groundwater wells installed in the mitigation area? Why?
Groundwater levels in LLV and seasonality
highest in spring, lowest in fall
Soil saturation--Benbow v. Ford parcels, mid-December
Soil staurated on Ford parcels, not Benbow
Where has the City of WIllits installed shallow groundwater monitoring wells?
Along Outlet Creek where they irrigate the wet meadow with effluent and where they constructed treatment/storage wetland ponds in 2010.
Affect of incised streams on groundwater
R1-2010-0066 August 6, 2010
Type 2wetland rehab
Passive successional development (< 60% of target wetland sp)2 Benbow parcels
When did Caltrans begin implementing a surface water quality sampling program?
Submitted in May 2012
Stream temperature is affected by a variety of environmental factors:
grazing measurescease hayingplant palettes
Environmental factors affecting stream temperature are associcated with:
LLV is underlain by a layer of ____ ______ approximately a maximum of _____ feet deep
Holocene alluvium, 250
Where CRAM field survey results are presented
2011 Baseline Report
Data evaluation of water quality objectives includes:
- BU designations;- WQO criteria to protect uses;- Implementation plans;- Antidegradation
BPCTRMCL (Ca and Fed Drinking Water)Suggested No Adverse Response LevelsAgricultural Use Protective LimitsHealth AdvisoriesTaste and odor based criteria
6 major other waters affected by project
Length of new segment
5.6 miles long
Mitigation parcels east of project footprint
Acreage of Oil Well Hill borrow area
5 parcels 212 acres192 acres wetlands1.73 acres other waters
53 acres50.98 wetland acres1.4 acres other waters
5 parcels491 acres399 acres wetlands9 acres other waters
47 acres42 acres wetlands
Type 4wetland rehab
- Aggressive conversion of existing vegetationExisting relative cover of up to 20% target spp.
10 acres8.45 acres wetlands
13 acres4.2 acres wetlands
3 parcels109 acres60.3 acres wetlands2.7 acres other waters
Where will livestock be excluded from?
All Category I, II, and III riparian corridors
MGC Plasma North Middle extent
45 acres6.6 acres wetlands
74 acre parcel72.5 acres wetlands
27 acres19.3 acres wetlands
Headcut and Erosion RepairBenbow
One in a swale tributary to an intermittent stream.Step pool sturcure
6 parcels372 acres301 acres wetlands7 acres other waters
Headcut and Erosion RepairFord Parcel
Outlet creekGrade back bank, plant, structure at toe
Preservation acreages occur only on these 2 parcels where no mitigation is planned
Huff and Taylor
167 acres2 parcels130.4 acres wetlands0.45 acres other waters
Where will semaphore grass establishment occur? How much?
2.96 acres on Huffman site
Headcut and Erosion RepairFrost Parcel
Five headcuts NE corner, trib to Berry3 instream, 2 uplandStep pool structures
Creek that is a priority for Category 1 riparian establishment
Caltrans will establish _____ acres of wetlands on the offsite mitigation parcels that are currently upland.
Wetland EstablishmentGroup 1 v. Group 2
2010 MMP sites (G1)2011 MMP sites (G2)
Rehabilitation mitigation acreage for offsite mitigation parcels
2 different management methods to be used to rehabilitate wetlands
1. grazing management on ~2/3 of the properties2. Removing grazing on the other 1/3
Mitigation for 4.07 acres of perm and temporary onsite other waters impacts
Headcut and Erosion RepairLusher Parcel
Trib to Old Outlet CreekInstreamstep pool structure
These 4 parcels contain portions of the bypass as well as additional mitigation acreage
Where oak woodland establishment will occur
Watson East parcel
Category II riparian corridor offsite establishment and rehab, in acres
Mitigation goals for Arkelian Parcel
- NCSG rehab- Wetland rehab (grazing, 10 acres)
Category III riparian corridor offsite establishment and rehab, in acres
Mitiagtion GoalsBenbow (108-030-07)
- BM rehab- WL rehabgrazing 34 acresType 3 20 acres
Offsite other riparian woodland establishment and rehabilitation
0.2 and 108
riparian establishment and grazing
riparian establishment will include permanently exluding cattle from the riparian corridors
riaprian areas and flash grazing
would only occur during long term mgmt period
What is involved in riparian rehabilitation?
estimated completion date for 2 lane facility
Who is responsible for off-site maintenance?
Plant establishment: CaltransShort-Term: Land managerLong-term: Land manager
Duration of plant establishment maintenance period
WHo will be the conservation easement holder?
Who will be the property owner and land manager, long-term?
Who will place an easement over the parcels?
Caltrans, or its designee
?How will long-term management tasks be funded
through a non-wasting endowment
Difference between wet meadows and rangeland
annual plant-dominated rangelandperennial plant-dominated wet meadows
Long term management plan--who will be the compliance monitor?
Who will be the endowment holder?