DOCSLIB.ORG

CEQA Initial Study and Mitigated Negative Declaration Summer Flow

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
CEQA Initial Study and Mitigated Negative Declaration Summer Flow CEQA Initial Study And Mitigated Negative Declaration Summer Flow Augmentation of Malibu Creek January 2019 Prepared by: Las Virgenes – Triunfo Joint Powers Authority 4232 Las Virgenes Road Calabasas, California 91302 Technical Assistance Provided by: Stantec Consulting Services Inc. 300 North Lake Avenue, Suite 400 Pasadena, California 91101 Table of Contents Section Name Page Number Section 1 Project and Agency Information .............................................................................. 1-1 1.1 Project Title and Lead Agency .................................................................................... 1-1 1.2 Project Background and Objectives ............................................................................. 1-1 1.2.1 Project Background ................................................................................................. 1-2 1.2.2 Project Objective ..................................................................................................... 1-2 1.3 Project Location and Environmental Setting ............................................................... 1-3 1.4 Project Description....................................................................................................... 1-3 1.4.1 Conveyance Pipeline ............................................................................................... 1-3 1.4.2 Water Treatment ..................................................................................................... 1-4 1.4.3 Construction ............................................................................................................ 1-6 1.4.4 Operations ............................................................................................................... 1-6 1.5 Public Agency Review and/or Approval ..................................................................... 1-6 Section 2 Environmental Analysis ............................................................................................ 2-1 2.1 Environmental Factors Potentially Affected ................................................................ 2-1 2.2 Agency Determination ................................................................................................. 2-1 2.3 Environmental Checklist .............................................................................................. 2-2 2.3.1 Aesthetics ................................................................................................................ 2-2 2.3.2 Agricultural and Forest Resources .......................................................................... 2-3 2.3.3 Air Quality .............................................................................................................. 2-4 2.3.4 Biological Resources ............................................................................................ 2-10 2.3.5 Cultural Resources ................................................................................................ 2-19 2.3.6 Geology and Soils ................................................................................................. 2-23 2.3.7 Greenhouse Gas Emissions ................................................................................... 2-25 2.3.8 Hazards and Hazardous Materials ........................................................................ 2-29 2.3.9 Hydrology and Water Quality ............................................................................... 2-31 2.3.10 Land Use and Planning ......................................................................................... 2-34 2.3.11 Mineral Resources ................................................................................................ 2-37 2.3.12 Noise ..................................................................................................................... 2-38 2.3.13 Population and Housing ........................................................................................ 2-44 2.3.14 Public Services ...................................................................................................... 2-45 2.3.15 Recreation ............................................................................................................. 2-46 2.3.16 Transportation and Traffic .................................................................................... 2-47 2.3.17 Tribal Cultural Resources ..................................................................................... 2-50 2.3.18 Utilities and Service Systems................................................................................ 2-52 2.3.19 Mandatory Findings of Significance ..................................................................... 2-54 Section 3 References, Abbreviations and Report Preparation .............................................. 3-1 3.1 References and Bibliography ....................................................................................... 3-1 3.2 Acronyms and Abbreviations ...................................................................................... 3-6 3.3 Preparers of the Initial Study ....................................................................................... 3-9 Summer Flow Augmentation of Malibu Creek Page i Initial Study January 2019 Table of Contents Table Name Page Number Table 1 SCAQMD Air Quality Significance Thresholds .......................................................... 2-5 Table 2 Estimated Peak Day Construction Air Pollutant Emissions ......................................... 2-7 Table 3 Estimated Fugitive Dust Emissions .............................................................................. 2-8 Table 4 Localized Significance Threshold Analysis Before Mitigation .................................... 2-8 Table 5 Estimated Annual Construction Air Pollutant Emissions ........................................... 2-27 Table 6 Estimated Annual GHG Emissions from Project Construction .................................. 2-28 Table 7 Los Angeles County Construction Noise Ordinance .................................................. 2-40 Table 8 Construction Equipment Noise Levels ....................................................................... 2-42 Figure Name Page Number Figure 1 Location Map................................................................................................................ 1-8 Figure 2 Area Plan ...................................................................................................................... 1-9 Figure 3 Pipeline Alignment ..................................................................................................... 1-10 Figure 4 View Under LA County Bridge: Method of Pipe Mounting ...................................... 1-10 Appendices A Biological Resources Technical Report B Cultural Resources Technical Report C Native American Consultation Summary Table Page ii Summer Flow Augmentation of Malibu Creek January 2019 Initial Study Section 1 Project and Agency Information 1.1 PROJECT TITLE AND LEAD AGENCY Project Title: Summer Flow Augmentation of Malibu Creek Lead Agency Name: Las Virgenes – Triunfo Joint Powers Authority Lead Agency Address: 4232 Las Virgenes Road, Calabasas, CA 91302-1994 Contact Person: Mr. Brett Dingman Contact Phone Number: (818) 251-2330 Project Sponsor: Same as Lead Agency 1.2 PROJECT BACKGROUND AND OBJECTIVES The Las Virgenes Municipal Water District (LVMWD) provides potable water, wastewater treatment, recycled water and biosolids composting to more than 75,000 residents in the cities of Agoura Hills, Calabasas, Hidden Hills, Westlake Village, and unincorporated areas of western Los Angeles County. The Triunfo Sanitation District serves approximately 33,000 residents of east Ventura County, including Oak Park, Lake Sherwood, Bell Canyon, and the Westlake Village and North Ranch portions of Thousand Oaks. In 1964, the Las Virgenes - Triunfo Joint Powers Authority (JPA) was established between LVMWD and Triunfo to treat wastewater within the Malibu Creek watershed. The JPA owns and operates the Tapia Water Reclamation Facility (Tapia WRF), which currently treats approximately 7 million gallons per day (mgd) of wastewater. The JPA is the lead agency for the proposed Summer Flow Augmentation of Malibu Creek project (proposed project) under the California Environmental Quality Act (CEQA). The JPA has prepared this Initial Study (IS) and proposed Mitigated Negative Declaration (MND) to address the impacts of construction and operation of conveyance of potable water to Tapia WRF, and facilities for ammonia removal at Tapia WRF prior to discharge to Malibu Creek for augmentation of summer stream flows. The IS has been prepared in accordance with CEQA, Public Resources Code Section 21000 et seq., and the State CEQA Guidelines, Title 14 California Code of Regulations (CCR) Section 15000 et seq. The IS serves to identify the site-specific environmental impacts, evaluate their potential significance, and determine the appropriate document needed to comply with CEQA. As described in this IS, with mitigation incorporated into the proposed project, the augmentation of summer flows in Malibu Creek would not have a significant impact on the environment. Based on the information reviewed and contained herein, a MND is the appropriate CEQA document. Summer Flow Augmentation of Malibu Creek Page 1-1 Initial Study January 2019 Section 1 – Project and Agency Information 1.2.1 Project Background Wastewater treated at the Tapia WRF is either reused
Load more

Recommended publications
  • West Americano Dal 12 Giugno Al 24 Giugno 2019
    WEST AMERICANO DAL 12 GIUGNO AL 24 GIUGNO 2019 PROGRAMMA DI VIAGGIO 1 GIORNO Los Angeles SISTEMAZIONE Standard Hilton Los Angeles Airport Solo pernottamento Un incaricato vi accoglierà nella zona bagagli (arrivi nazionali) oppure all'uscita dalla dogana (arrivi internazionali) e vi fornirà tutte le indicazioni necessarie riguardanti il trasferimento al vostro albergo. PUNTI DI INTERESSE Los Angeles Los Angeles è un' importante città della California, la più grande di questo stato e la seconda di tutti gli Stati Uniti d'America. Insieme a New York e Chicago è una delle tre città più importanti del paese ed è un centro economico, culturale, cinematografico e scientifico di rilevanza mondiale. Diventata città il 4 aprile 1850, è il capoluogo dell'omonima contea. L'area costiera dove sarebbe sorta Los Angeles venne abitata per millenni da popolazioni native, come i Tongva, i Chumash e altri gruppi etnici, anche più antichi. L'economia di Los Angeles ha i suoi maggiori punti di forza nel commercio internazionale, nell'industria dell'audiovisivo (film, produzioni televisive, musica), nei settori aeronautico e aerospaziale, nell'agricoltura, nel turismo e nell'industria petrolifera. Los Angeles è divisa in diversi distretti, molti dei quali erano comunità autonome, entrate nel tempo a far parte della città 2 GIORNO Los Angeles SISTEMAZIONE Los Angeles Hilton Airport Prima colazione e pranzo Prima colazione. Partenza per il giro città dove si visiteranno Hollywood, Beverly Hills e Rodeo Drive. Pranzo. Pomeriggio interamente a disposizione. PUNTI DI INTERESSE Beverly Hills Beverly Hills è interamente circondata dalla città di Los Angeles. Pur essendo una città a sè, culturalmente fa ancora largamente parte di Los Angeles.
    [Show full text]
  • 18-Daagse Familiereis
    NOORD AMERIKA, WEST KUST The Best of The West Tijdens deze reis worden natuurgebieden afgewisseld met kleurrijke wereldsteden zoals Los Angeles met de beroemde wijken Santa Monica, Hollywood en Beverly Hills, San Fransisco met de Golden Gate Bridge en cable cars en de 'gokstad Las Vegas met haar vele casino's en themahotels. Een populaire route onder Amerika-reizigers is de California State Route 1, ook wel Highway Number 1 genoemd die van San Francisco naar Los Angeles loopt met een lengte van ca. 650-700 kilometer. Je passeert onderweg de juweeltjes van de Pacific Coast zoals Santa Barbara en de kustlijn is verbluffend fraai met uitgestrekte vergezichten over de Stille Oceaan. In Arizona ligt Sedona, prachtig gelegen tussen de Red Rock Canyons waar een bezoek aan de Montezuma Castle vanwege de Indianen cultuur niet mag ontbreken. Page 2 REIS SCHEMA DAG 1 Amsterdam – San Francisco DAG 2 San Francisco DAG 3 San Francisco DAG 4 San Francisco - Monterey DAG 5 Monterey DAG 6 Monterey - Santa Barbara DAG 7 Santa Barbara DAG 8 Santa Barbara – Santa Monica DAG 9 Santa Monica DAG 10 Santa Monica DAG 11 Santa Monica – Las Vegas DAG 12 Las Vegas DAG 13 Las Vegas – Grand Canyon DAG 14 Grand Canyon DAG 15 Grand Canyon - Sedona DAG 16 Sedona DAG 17 Sedona DAG 18 Sedona – Phoenix - Amsterdam Page 3 DAG TOT DAG PROGRAMMA DAG 1 Amsterdam San - Francisco Vertrek Amsterdam om 09.50 en aankomst in San Franciso om11.45 per KLM De auto kan op de luchthaven worden opgehaald. Overnachting San Francisco DAG 2 en 3 San Francisco Voldoende tijd om deze heerlijke stad te verkennen.
    [Show full text]
  • Historic P U B Lic W Ork S P Roje Cts on the Ce N Tra L
    SHTOIRICHISTORIC SHTOIRIC P U B LIC W ORK S P ROJE TSCP ROJE CTS P ROJE TSC ON THE CE N TRA L OCA STCOA ST OCA ST Compiled by Douglas Pike, P.E. Printing Contributed by: Table of Contents Significant Transportation P rojects......2 El Camino Real................................................... 2 US Route 101...................................................... 3 California State Route 1...................................... 6 The Stone Arch Bridge ..................................... 11 Cold Spring Canyon Arch Bridge..................... 12 Significant W ater P rojects...................14 First Dams and Reservoirs................................ 14 First Water Company........................................ 14 Cold Spring Tunnel........................................... 15 Mission Tunnel ................................................. 16 Gibraltar Dam ................................................... 16 Central Coast Conduit....................................... 18 Water Reclamation In Santa Maria Valley....... 23 Twitchell Dam & Reservoir.............................. 24 Santa Maria Levee ............................................ 26 Nacimiento Water Project................................. 28 M iscellaneous P rojects of Interest.......30 Avila Pier .......................................................... 30 Stearns Wharf.................................................... 32 San Luis Obispo (Port Harford) Lighthouse..... 34 Point Conception Lighthouse............................ 35 Piedras Blancas Light ......................................
    [Show full text]
  • LWHC Once Upon Laguna Woods
    Once Upon Laguna Woods by Dean O. Dixon Once upon a time in a magical land there were fiery volcanos, roiling seas, and fearsome animals. Then came warriors, conquerors, banishment, empires, slaves, wars, pirates, corruption, bandits, posses, lynching, ghosts, invasion, exploitation, riches, scandal and, yes, even happily ever after. Fiction? No. These are true stories about the land right under your feet in and around Laguna Woods. So what did happen once upon Laguna Woods? Well, are you up for some time travel? The beloved natural vistas from Laguna Woods reflect decades of conservation efforts that preserved tens of thousands of pristine acres from any future human development. You get to enjoy this in perpetuity without it ever being disturbed. Woods End Wilderness Preserve, Laguna Coast Wilderness Park, Aliso & Wood Canyons Wilderness Park, Crystal Cove State Park, Laguna Niguel Regional Park, and City of Irvine Open Space Preserve are contiguous in a synergistic display of your natural history. But what exactly do you see? Once Upon Laguna Woods February 27, 2016 page !2 of !60 Natural erosion has exposed up to 65 million years of rock strata laid down and compressed one layer atop another by eons of changes in the earth’s crust as influenced by climate, flora and fauna. Sand from deserts and beaches, mud from swamps and rivers, skeletons of sea and land creatures, recurrences of these, and still more are solidified and revealed like layers in a slice of cake for the delight of geologists and further study by anyone so inclined. Related tectonics further changed and are changing your area even today as the Atlantic Plate pushes the North American Plate westward into the Pacific Plate along that constant worry of yours, the San Andreas Fault.
    [Show full text]
  • 3.4 Biological Resources for the Purpose of This EIR, Biological Resources Comprise Vegetation, Wildlife, Natural Communities, and Wetlands and Other Waters
    Impact Analysis Alameda County Community Development Agency Biological Resources 3.4 Biological Resources For the purpose of this EIR, biological resources comprise vegetation, wildlife, natural communities, and wetlands and other waters. Potential biological resource impacts associated with the program and the two individual projects are analyzed. Potential impacts are described quantitatively and qualitatively in Section 3.4.2, Environmental Impacts. This section also identifies specific and detailed measures to avoid, minimize, or compensate for potentially significant impacts on biological resources, where necessary. 3.4.1 Existing Conditions Regulatory Setting Federal Endangered Species Act Pursuant to the federal Endangered Species Act (ESA), USFWS and the National Marine Fisheries Service (NMFS) have authority over projects that may result in take of a species listed as threatened or endangered under the act. Take is defined under the ESA, in part, as killing, harming, or harassing. Under federal regulations, take is further defined to include habitat modification or degradation that results, or is reasonably expected to result, in death or injury to wildlife by significantly impairing essential behavioral patterns, including breeding, feeding, or sheltering. If a likelihood exists that a project would result in take of a federally listed species, either an incidental take permit, under Section 10(a) of the ESA, or a federal interagency consultation, under Section 7 of the ESA, is required. Several federally listed species—vernal pool fairy shrimp (Branchinecta lynchi), longhorn fairy shrimp (Branchinecta longiantenna), vernal pool tadpole shrimp (Lepidurus packardi), California tiger salamander (Ambystoma californiense), California red‐legged frog (Rana draytonii), Alameda whipsnake (Masticophis lateralis euryxanthus), and San Joaquin kit fox (Vulpes macrotis mutica)—have the potential to be affected by activities associated with the Golden Hills and Patterson Pass projects as well as subsequent repowering projects.
    [Show full text]
  • Cal Poly, San Luis Obispo
    EVENTS CENTER COMPLEX FEASIBILITY STUDY CAL POLY, SAN LUIS OBISPO AUGUST 2014 FINAL REPORT INSPIRE. EMPOWER. ADVANCE. This Page Left Intentionally Blank TABLE OF CONTENTS SECTIONS EXHIBITS 1.0………….Preface A………….ESRI Market Demographic Profile 2.0………….Executive Summary B………...STR Hotel Survey 3.0………….Market Analysis C………….Arena Pro Forma & Outline Program 3.0………Local Market Conditions D………….Hotel/Conference Center Pro Forma & Outline Program 3.1………Events Center Analysis E………….Arena Development Budget (Form 2-7) 3.2………Hotel/Conference Center Analysis F………….Hotel/Conference Center Development Budget (Form 2-7) 4.0………….Financial Analysis 5.0………….Economic Impact Analysis August 2014 0.1 This Page Left Intentionally Blank SECTION 1 This Page Left Intentionally Blank PREFACE 1.0 - PREFACE In December of 2013, California Polytechnic State University (“Cal Poly”) and Communitas LLC engaged Brailsford & Dunlavey (“B&D”) to analyze the market potential for an events center complex consisting of two primary projects: an events center arena and an integrated hotel, conference center, and museum. To complete this assignment, B&D conducted a market study for each project type that culminates in financial analyses with an outline program, project budget, and ten-year pro forma for each project type. QUALIFICATIONS The findings of this study constitute the professional opinions of B&D personnel based on the assumptions and conditions detailed throughout. B&D analysts have conducted research using both primary and secondary sources which are deemed reliable, but whose accuracy B&D cannot guarantee. Due to variations in the national and global economic conditions, actual expenses and revenues may vary from projections, and these variances may be material.
    [Show full text]
  • Hydrology and Water Quality Modeling of the Santa Monica Bay Watershed
    JULY 2009 19. Hydrology and Water Quality Modeling of the Santa Monica Bay Watershed Jingfen Sheng John P. Wilson Acknowledgements: Financial support for this work was provided by the San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy, as part of the “Green Visions Plan for 21st Century Southern California” Project. The authors thank Jennifer Wolch for her comments and edits on this paper. The authors would also like to thank Eric Stein, Drew Ackerman, Ken Hoffman, Wing Tam, and Betty Dong for their timely advice and encouragement. Prepared for: San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy 100 N. Old San Gabriel Canyon Road Azusa, CA 91702. Preferred Citation: Sheng, J., and Wilson, J.P., 2009. The Green Visions Plan for 21st Century Southern California: 18, Hydrology and Water Quality Modeling for the Santa Monica Bay Watershed. University of Southern California GIS Research Laboratory, Los Angeles, California. This report was printed on recycled paper. The mission of the Green Visions Plan for 21st Century Southern California is to offer a guide to habitat conservation, watershed health and recreational open space for the Los Angeles metropolitan region. The Plan will also provide decision support tools to nurture a living green matrix for southern California. Our goals are to protect and restore natural areas, restore natural hydrological function, promote equitable access to open space, and maximize support via multiple-use facilities. The Plan is a joint venture between the University of Southern California and the San Gabriel and lower Los Angeles Rivers and Mountains Conservancy, Santa Monica Mountains Conservancy, Coastal Conservancy, and Baldwin Hills Conservancy.
    [Show full text]
  • 16. Watershed Assets Assessment Report
    16. Watershed Assets Assessment Report Jingfen Sheng John P. Wilson Acknowledgements: Financial support for this work was provided by the San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy and the County of Los Angeles, as part of the “Green Visions Plan for 21st Century Southern California” Project. The authors thank Jennifer Wolch for her comments and edits on this report. The authors would also like to thank Frank Simpson for his input on this report. Prepared for: San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy 900 South Fremont Avenue, Alhambra, California 91802-1460 Photography: Cover, left to right: Arroyo Simi within the city of Moorpark (Jaime Sayre/Jingfen Sheng); eastern Calleguas Creek Watershed tributaries, classifi ed by Strahler stream order (Jingfen Sheng); Morris Dam (Jaime Sayre/Jingfen Sheng). All in-text photos are credited to Jaime Sayre/ Jingfen Sheng, with the exceptions of Photo 4.6 (http://www.you-are- here.com/location/la_river.html) and Photo 4.7 (digital-library.csun.edu/ cdm4/browse.php?...). Preferred Citation: Sheng, J. and Wilson, J.P. 2008. The Green Visions Plan for 21st Century Southern California. 16. Watershed Assets Assessment Report. University of Southern California GIS Research Laboratory and Center for Sustainable Cities, Los Angeles, California. This report was printed on recycled paper. The mission of the Green Visions Plan for 21st Century Southern California is to offer a guide to habitat conservation, watershed health and recreational open space for the Los Angeles metropolitan region. The Plan will also provide decision support tools to nurture a living green matrix for southern California.
    [Show full text]
  • USGS DDS-43, Status of Terrestrial Vertebrates
    DAVID M. GRABER National Biological Service Sequoia and Kings Canyon Field Station Three Rivers, California 25 Status of Terrestrial Vertebrates ABSTRACT The terrestrial vertebrate wildlife of the Sierra Nevada is represented INTRODUCTION by about 401 regularly occurring species, including three local extir- There are approximately 401 species of terrestrial vertebrates pations in the 20th century. The mountain range includes about two- that use the Sierra Nevada now or in recent times according thirds of the bird and mammal species and about half the reptiles to the California Wildlife Habitat Relationships System and amphibians in the State of California. This is principally because (CWHR) (California Department of Fish and Game 1994) (ap- of its great extent, and because its foothill woodlands and chaparral, pendix 25.1). Of these, thirteen are essentially restricted to mid-elevation forests, and alpine vegetation reflect, in structure and the Sierra in California (one of these is an alien; i.e. not native function if not species, habitats found elsewhere in the State. About to the Sierra Nevada); 278 (eight aliens) include the Sierra in 17% of the Sierran vertebrate species are considered at risk by state their principal range; and another 110 (six aliens) use the Si- or federal agencies; this figure is only slightly more than half the spe- erra as a minor portion of their range. Included in the 401 are cies at risk for the state as a whole. This relative security is a function 232 species of birds; 112 species of mammals; thirty-two spe- of the smaller proportion of Sierran habitats that have been exten- cies of reptiles; and twenty-five species of amphibians (ap- sively modified.
    [Show full text]
  • Watershed Summaries
    Appendix A: Watershed Summaries Preface California’s watersheds supply water for drinking, recreation, industry, and farming and at the same time provide critical habitat for a wide variety of animal species. Conceptually, a watershed is any sloping surface that sheds water, such as a creek, lake, slough or estuary. In southern California, rapid population growth in watersheds has led to increased conflict between human users of natural resources, dramatic loss of native diversity, and a general decline in the health of ecosystems. California ranks second in the country in the number of listed endangered and threatened aquatic species. This Appendix is a “working” database that can be supplemented in the future. It provides a brief overview of information on the major hydrological units of the South Coast, and draws from the following primary sources: • The California Rivers Assessment (CARA) database (http://www.ice.ucdavis.edu/newcara) provides information on large-scale watershed and river basin statistics; • Information on the creeks and watersheds for the ESU of the endangered southern steelhead trout from the National Marine Fisheries Service (http://swr.ucsd.edu/hcd/SoCalDistrib.htm); • Watershed Plans from the Regional Water Quality Control Boards (RWQCB) that provide summaries of existing hydrological units for each subregion of the south coast (http://www.swrcb.ca.gov/rwqcbs/index.html); • General information on the ecology of the rivers and watersheds of the south coast described in California’s Rivers and Streams: Working
    [Show full text]
  • Southern Steelhead Populations Are in Danger of Extinction Within the Next 25-50 Years, Due to Anthropogenic and Environmental Impacts That Threaten Recovery
    SOUTHERN CALIFORNIA STEELHEAD Oncorhynchus mykiss irideus Critical Concern. Status Score = 1.9 out of 5.0. Southern steelhead populations are in danger of extinction within the next 25-50 years, due to anthropogenic and environmental impacts that threaten recovery. Since its listing as an Endangered Species in 1997, southern steelhead abundance remains precariously low. Description: Southern steelhead are similar to other steelhead and are distinguished primarily by genetic and physiological differences that reflect their evolutionary history. They also exhibit morphometric differences that distinguish them from other coastal steelhead in California such as longer, more streamlined bodies that facilitate passage more easily in Southern California’s characteristic low flow, flashy streams (Bajjaliya et al. 2014). Taxonomic Relationships: Rainbow trout (Oncorhynchus mykiss) historically populated all coastal streams of Southern California with permanent flows, as either resident or anadromous trout, or both. Due to natural events such as fire and debris flows, and more recently due to anthropogenic forces such as urbanization and dam construction, many rainbow trout populations are isolated in remote headwaters of their native basins and exhibit a resident life history. In streams with access to the ocean, anadromous forms are present, which have a complex relationship with the resident forms (see Life History section). Southern California steelhead, or southern steelhead, is our informal name for the anadromous form of the formally designated Southern California Coast Steelhead Distinct Population Segment (DPS). Southern steelhead occurring below man-made or natural barriers were distinguished from resident trout in the Endangered Species Act (ESA) listing, and are under different jurisdictions for purposes of fisheries management although the two forms typically constitute one interbreeding population.
    [Show full text]
  • Los Angeles County
    Steelhead/rainbow trout resources of Los Angeles County Arroyo Sequit Arroyo Sequit consists of about 3.3 stream miles. The arroyo is formed by the confluence of the East and West forks, from where it flows south to enter the Pacific Ocean east of Sequit Point. As part of a survey of 32 southern coastal watersheds, Arroyo Sequit was surveyed in 1979. The O. mykiss sampled were between about two and 6.5 inches in length. The survey report states, “Historically, small steelhead runs have been reported in this area” (DFG 1980). It also recommends, “…future upstream water demands and construction should be reviewed to insure that riparian and aquatic habitats are maintained” (DFG 1980). Arroyo Sequit was surveyed in 1989-1990 as part of a study of six streams originating in the Santa Monta Mountains. The resulting report indicates the presence of steelhead and states, “Low streamflows are presently limiting fish habitat, particularly adult habitat, and potential fish passage problems exist…” (Keegan 1990a, p. 3-4). Staff from DFG surveyed Arroyo Sequit in 1993 and captured O. mykiss, taking scale and fin samples for analysis. The individuals ranged in length between about 7.7 and 11.6 inches (DFG 1993). As reported in a distribution study, a 15-17 inch trout was observed in March 2000 in Arroyo Sequit (Dagit 2005). Staff from NMFS surveyed Arroyo Sequit in 2002 as part of a study of steelhead distribution. An adult steelhead was observed during sampling (NMFS 2002a). Additional documentation of steelhead using the creek between 2000-2007 was provided by Dagit et al.
    [Show full text]