DOCSLIB.ORG

Effects of a 2006 High-Flow Release from Tiber Dam on Channel Morphology at Selected Sites on the Marias River, Montana

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Effects of a 2006 High-Flow Release from Tiber Dam on Channel Morphology at Selected Sites on the Marias River, Montana In Cooperation with the Bureau of Reclamation Effects of a 2006 High-Flow Release from Tiber Dam on Channel Morphology at Selected Sites on the Marias River, Montana By Gregor T. Auble and Zachary H. Bowen Open-File Report 2008–1234 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director U.S. Geological Survey, Reston, Virginia 2008 For general product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Suggested citation: Auble, G.T., and Bowen, Z.H., 2008, Effects of a 2006 High-Flow Release from Tiber Dam on Channel Morphology at Selected Sites on the Marias River, Montana: U.S. Geological Survey Open File Report 2008-1234, 39 p. This product is available online at http://pubs.usgs.gov/. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. ii Contents Executive Summary...........................................................................................................................................1 Introduction ........................................................................................................................................................2 Marias River Site Description .........................................................................................................................3 Setting..............................................................................................................................................................3 Hydrology ........................................................................................................................................................3 Cottonwood and Russian-olive ...................................................................................................................8 Limnology and Aquatic Communities.......................................................................................................10 Pallid Sturgeon.............................................................................................................................................11 Effects of a High-Flow Release on Channel Geometry.............................................................................12 Methods ........................................................................................................................................................12 Results ...........................................................................................................................................................13 Discussion.....................................................................................................................................................34 Acknowledgments...........................................................................................................................................36 References Cited .............................................................................................................................................37 iii Figures 1. Marias River ................................................................................................................................................4 2. Mean daily discharge at selected Marias River gages in 2006 and in periods before (1922–1955) and after (1957–2006) Tiber Dam......................................................................................6 3. Annual peak discharge at selected Marias River gages....................................................................7 4. Changes in mean daily discharge by month and year from gage 06101500 to gage 06102050 ....9 5. Aerial imagery of study region on lower Marias River from 2005 ...................................................13 6. Aerial imagery of Sites IS and BC on Marias River from 2005.........................................................14 7. Cross sections 1 and 2 at Site IS ...........................................................................................................16 8. Cross sections 3 and 4 at Site IS ...........................................................................................................17 9. Cross sections 5 and 6 at Site IS ...........................................................................................................18 10. Cross sections 7 and 8 at Site IS ...........................................................................................................19 11. Cross sections 9 and 10 at Site IS .........................................................................................................20 12. Cross sections 11 and 12 at Site BC......................................................................................................21 13. Cross sections 13 and 14 at Site BC......................................................................................................22 14. Cross sections 15 and 16 at Site BC......................................................................................................23 15. Cross sections 17 and 18 at Site BC......................................................................................................24 16. Cross sections 19 and 20 at Site BC......................................................................................................25 17. Cross section 3 at Site IS from right (facing downstream) head pin ..............................................26 18. Cross section 2 at Site IS from left (facing downstream) head pin.................................................27 19. Deposition creating primary levee landform on bank lip of right (facing downstream) bank near cross section 10 at Site IS............................................................................................................28 20. Flowing back channel at Site BC...........................................................................................................29 21. Cross section 14 at Site BC from left (facing downstream) head pin .............................................30 22. Box plots of changes in cross-sectional area ....................................................................................31 23. Box plots of wetted perimeter at cross sections................................................................................32 24. Profiles of bed elevation and water surface at Sites IS and BC. Channel-bed profiles were estimated by thalweg (lowest point in channel) locations and elevations at the cross sections .........................................................................................................................................33 iv Conversion Factors SI to Inch/Pound Multiply By To obtain Length centimeter (cm) 0.3937 inch meter (m) 3.281 foot (ft) kilometer (km) 0.6214 mile (mi) meter (m) 1.094 yard (yd) Area square meter (m2) 0.0002471 acre square kilometer (km2) 247.1 acre square centimeter (cm2) 0.001076 square foot (ft2) square meter (m2) 10.76 square foot (ft2) square centimeter (cm2) 0.1550 square inch (ft2) Volume liter (L) 0.2642 gallon (gal) cubic meter (m3) 264.2 gallon (gal) liter (L) 61.02 cubic inch (in3) cubic meter (m3) 35.31 cubic foot (ft3) cubic meter (m3) 0.0008107 acre-foot (acre-ft) Flow rate cubic meter per second 70.07 acre-foot per day (acre- (m3/s) ft/d) cubic meter per second 35.31 cubic foot per second (m3/s) (ft3/s) Mass gram (g) 0.03527 ounce, avoirdupois (oz) kilogram (kg) 2.205 pound avoirdupois (lb) Hydraulic gradient meter per kilometer 5.27983 foot per mile (ft/mi) (m/km) Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows: °F=(1.8×°C)+32 Vertical coordinate data was determined relative to the North American Vertical Datum of 88 (NAVD88). Horizontal coordinate data was determined relative to the North American Datum of 83(99) (NAD83[99]). v Effects of a 2006 High-Flow Release from Tiber Dam on Channel Morphology at Selected Sites on the Marias River, Montana By Gregor T. Auble and Zachary H. Bowen Executive Summary In June 2006, an opportunistic high-flow release was made from Tiber Dam on the Marias River in Mont., to investigate possible alternatives for partially restoring the river’s natural flow pattern and variability. At two sites along the river, we measured channel geometry before and after the high-flow release to evaluate channel change and alteration of physical habitat. Streamflow downstream from Tiber Dam has been stabilized by reduction of high flows and augmentation of low flows. This has produced flood-control benefits as well as some possible adverse environmental effects downstream from the dam. The 2006 high-flow release resulted in a downstream hydrograph with high flows of above-average magnitude in the post- dam flow regime of the Marias River. Timing of the peak and the declining limb of the release hydrograph were very similar to a historical, unregulated hydrograph of the Marias River. Furthermore, the high flow produced many of the qualitative elements of ecologically
Load more

Recommended publications
  • GEOLOGY and COAL RESOURCES of NORTHERN TETON COUNTY, MONTANA. by EUGENE STEBINGER. the Paper Here Presented Describes the Coal R
    GEOLOGY AND COAL RESOURCES OF NORTHERN TETON COUNTY, MONTANA. By EUGENE STEBINGER. INTRODUCTION. The paper here presented describes the coal resources of a large area in Teton County,1 northwestern Montana, including the Black- feet Indian Eeservation and a considerable area of the country lying to the east. The scope of the paper is limited to a consideration only of those features having a bearing on the value and quantity of the coal present. The geology of the region is briefly described, the aim being to give a general understanding of the geologic setting in which the coals occur. Nearly all the rocks in northern Teton County belong to formations that are of the same age as others which, elsewhere in Montana, con­ tain almost all the coal found in the State. This fact led to several generous estimates as to the extent of the coal-bearing areas likely to be found in this region. Weed 2 and Rowe 3 have published maps on which the valuable bituminous coal area of the Great Falls field is shown as extending northward entirely across Teton County to the Canadian boundary. Similarly, the presence of an extensive coal field, long actively developed at Lethridge, Alberta, 50 miles north of the boundary, gave rise to forecasts that a southward extension of that field, following the strike of the geologic formations, would be found on the line of the Great Northern Railway in northern Teton County. The result of the present work shows that although the coal-bearing formation of the Great Falls field, the Kootenai forma­ tion, is present in the area here described, the only coal in it is a bed 6 or 8 inches thick in Marias Pass, also that although the horizon of the coal mined at Lethbridge is traceable entirely across this area, it shows only thin coal beds, nowhere over 18 inches thick.
    [Show full text]
  • Compilation of Reported Sapphire Occurrences in Montana
    Report of Investigation 23 Compilation of Reported Sapphire Occurrences in Montana Richard B. Berg 2015 Cover photo by Richard Berg. Sapphires (very pale green and colorless) concentrated by panning. The small red grains are garnets, commonly found with sapphires in western Montana, and the black sand is mainly magnetite. Compilation of Reported Sapphire Occurrences, RI 23 Compilation of Reported Sapphire Occurrences in Montana Richard B. Berg Montana Bureau of Mines and Geology MBMG Report of Investigation 23 2015 i Compilation of Reported Sapphire Occurrences, RI 23 TABLE OF CONTENTS Introduction ............................................................................................................................1 Descriptions of Occurrences ..................................................................................................7 Selected Bibliography of Articles on Montana Sapphires ................................................... 75 General Montana ............................................................................................................75 Yogo ................................................................................................................................ 75 Southwestern Montana Alluvial Deposits........................................................................ 76 Specifi cally Rock Creek sapphire district ........................................................................ 76 Specifi cally Dry Cottonwood Creek deposit and the Butte area ....................................
    [Show full text]
  • Federal Register/Vol. 74, No. 68/Friday, April 10, 2009
    16426 Federal Register / Vol. 74, No. 68 / Friday, April 10, 2009 / Notices Agreement of the Settlement Agreement 31. LU Sheet Company, Boysen Unit, INTERNATIONAL TRADE on Operating Procedures for Green P–SMBP, Wyoming: Contract renewal of COMMISSION Mountain Reservoir Concerning long-term water service contract. [Investigation No. 337–TA–604] Operating Limitations and in Resolution 32. Busch Farms, Inc., Boysen Unit, of the Petition Filed August 7, 2003, in P–SMBP, Wyoming: Contract renewal of In the Matter of Certain Sucralose, Case No. 49–CV–2782 (The United long-term water service contract. Sweeteners Containing Sucralose, and States v. Northern Colorado Water Related Intermediate Compounds Conservancy District, et al., U.S. District 33. Gorst Ranch, Boysen Unit, P– SMBP, Wyoming: Contract renewal of Thereof; Notice of Commission Court for the District of Colorado, Case Issuance of a Limited Exclusion Order; long-term water service contract. No. 2782 and Consolidated Case Nos. Termination of Investigation 5016 and 5017). 34. Helena Sand & Gravel, Helena 20. Colorado River Water valley Unit, P–SMBP, Montana: request AGENCY: U.S. International Trade Conservation District, Colorado-Big for a long-term water service contract for Commission. Thompson Project, Colorado: M&I purposes up to 1,000 acre-feet per ACTION: Notice. Consideration of a request for a long- year. term contract for the use of excess SUMMARY: Notice is hereby given that 35. City of Cheyenne, Kendrick the U.S. International Trade capacity for storage and exchange in Project, Wyoming: the of Cheyenne has Green Mountain Reservoir in the Commission has issued a limited requested an amendment to its water exclusion order against eleven Colorado-Big Thompson Project.
    [Show full text]
  • Montana State Parks Guide Reservations for Camping and Other Accommodations: Toll Free: 1-855-922-6768 Stateparks.Mt.Gov
    For more information about Montana State Parks: 406-444-3750 TDD: 406-444-1200 website: stateparks.mt.gov P.O. Box 200701 • Helena, MT 59620-0701 Montana State Parks Guide Reservations for camping and other accommodations: Toll Free: 1-855-922-6768 stateparks.mt.gov For general travel information: 1-800-VISIT-MT (1-800-847-4868) www.visitmt.com Join us on Twitter, Facebook & Instagram If you need emergency assistance, call 911. To report vandalism or other park violations, call 1-800-TIP-MONT (1-800-847-6668). Your call can be anonymous. You may be eligible for a reward. Montana Fish, Wildlife & Parks strives to ensure its programs, sites and facilities are accessible to all people, including those with disabilities. To learn more, or to request accommodations, call 406-444-3750. Cover photo by Jason Savage Photography Lewis and Clark portrait reproductions courtesy of Independence National Historic Park Library, Philadelphia, PA. This document was produced by Montana Fish Wildlife & Parks and was printed at state expense. Information on the cost of this publication can be obtained by contacting Montana State Parks. Printed on Recycled Paper © 2018 Montana State Parks MSP Brochure Cover 15.indd 1 7/13/2018 9:40:43 AM 1 Whitefish Lake 6 15 24 33 First Peoples Buffalo Jump* 42 Tongue River Reservoir Logan BeTableaverta ilof Hill Contents Lewis & Clark Caverns Les Mason* 7 16 25 34 43 Thompson Falls Fort3-9 Owen*Historical Sites 28. VisitorMadison Centers, Buff Camping,alo Ju mp* Giant Springs* Medicine Rocks Whitefish Lake 8 Fish Creek 17 Granite11-15 *Nature Parks 26DisabledMissouri Access Headw ibility aters 35 Ackley Lake 44 Pirogue Island* WATERTON-GLACIER INTERNATIONAL 2 Lone Pine* PEACE PARK9 Council Grove* 18 Lost Creek 27 Elkhorn* 36 Greycliff Prairie Dog Town* 45 Makoshika Y a WHITEFISH < 16-23 Water-based Recreation 29.
    [Show full text]
  • Lake Elwell (Tiber Dam)
    Upper Missouri River Basin Water Year 2013 Summary of Actual Operations Water Year 2014 Annual Operating Plans U.S. Department of Interior Bureau of Reclamation Great Plains Region TABLE OF CONTENTS SUMMARIES OF OPERATION FOR WATER YEAR 2013 FOR RESERVOIRS IN MONTANA, WYOMING, AND THE DAKOTAS INTRODUCTION RESERVOIRS UNDER THE RESPONSIBILITY OF THE MONTANA AREA OFFICE SUMMARY OF HYDROLOGIC CONDITIONS AND FLOOD CONTROL OPERATIONS DURING WY 2013 ........................................................................................................................ 1 FLOOD BENEFITS...................................................................................................................... 12 UNIT OPERATIONAL SUMMARIES FOR WY 2013 .............................................................. 14 Clark Canyon Reservoir ............................................................................................................ 14 Canyon Ferry Lake and Powerplant ......................................................................................... 21 Helena Valley Reservoir ........................................................................................................... 32 Sun River Project ...................................................................................................................... 34 Gibson Reservoir .................................................................................................................. 34 Pishkun Reservoir ................................................................................................................
    [Show full text]
  • GLACIERS and GLACIATION in GLACIER NATIONAL PARK by J Mines Ii
    Glaciers and Glacial ion in Glacier National Park Price 25 Cents PUBLISHED BY THE GLACIER NATURAL HISTORY ASSOCIATION IN COOPERATION WITH THE NATIONAL PARK SERVICE Cover Surveying Sperry Glacier — - Arthur Johnson of U. S. G. S. N. P. S. Photo by J. W. Corson REPRINTED 1962 7.5 M PRINTED IN U. S. A. THE O'NEIL PRINTERS ^i/TsffKpc, KALISPELL, MONTANA GLACIERS AND GLACIATTON In GLACIER NATIONAL PARK By James L. Dyson MT. OBERLIN CIRQUE AND BIRD WOMAN FALLS SPECIAL BULLETIN NO. 2 GLACIER NATURAL HISTORY ASSOCIATION. INC. GLACIERS AND GLACIATION IN GLACIER NATIONAL PARK By J Mines Ii. Dyson Head, Department of Geology and Geography Lafayette College Member, Research Committee on Glaciers American Geophysical Union* The glaciers of Glacier National Park are only a few of many thousands which occur in mountain ranges scattered throughout the world. Glaciers occur in all latitudes and on every continent except Australia. They are present along the Equator on high volcanic peaks of Africa and in the rugged Andes of South America. Even in New Guinea, which many think of as a steaming, tropical jungle island, a few small glaciers occur on the highest mountains. Almost everyone who has made a trip to a high mountain range has heard the term, "snowline," and many persons have used the word with­ out knowing its real meaning. The true snowline, or "regional snowline" as the geologists call it, is the level above which more snow falls in winter than can he melted or evaporated during the summer. On mountains which rise above the snowline glaciers usually occur.
    [Show full text]
  • Montana Fishing Regulations
    MONTANA FISHING REGULATIONS 20March 1, 2018 — F1ebruary 828, 2019 Fly fishing the Missouri River. Photo by Jason Savage For details on how to use these regulations, see page 2 fwp.mt.gov/fishing With your help, we can reduce poaching. MAKE THE CALL: 1-800-TIP-MONT FISH IDENTIFICATION KEY If you don’t know, let it go! CUTTHROAT TROUT are frequently mistaken for Rainbow Trout (see pictures below): 1. Turn the fish over and look under the jaw. Does it have a red or orange stripe? If yes—the fish is a Cutthroat Trout. Carefully release all Cutthroat Trout that cannot be legally harvested (see page 10, releasing fish). BULL TROUT are frequently mistaken for Brook Trout, Lake Trout or Brown Trout (see below): 1. Look for white edges on the front of the lower fins. If yes—it may be a Bull Trout. 2. Check the shape of the tail. Bull Trout have only a slightly forked tail compared to the lake trout’s deeply forked tail. 3. Is the dorsal (top) fin a clear olive color with no black spots or dark wavy lines? If yes—the fish is a Bull Trout. Carefully release Bull Trout (see page 10, releasing fish). MONTANA LAW REQUIRES: n All Bull Trout must be released immediately in Montana unless authorized. See Western District regulations. n Cutthroat Trout must be released immediately in many Montana waters. Check the district standard regulations and exceptions to know where you can harvest Cutthroat Trout. NATIVE FISH Westslope Cutthroat Trout Species of Concern small irregularly shaped black spots, sparse on belly Average Size: 6”–12” cutthroat slash— spots
    [Show full text]
  • Morton J. Elrod: Glacier Park Naturalist
    The University of Montana Sawtooth Mountain on the Rocky Mountain Front Issue 2 - December 2012 Morton J. Elrod: Glacier Park Naturalist Morton Elrod Photographing Chaney Glacier, Glacier National Park, 1911, Photographer Unknown, Archives & Special Collections, Mansfield Library, The University of Montana—Missoula. Dispatches is a publication of The University of Montana’s Crown of the Continent Initiative and is an adjunct to the University of Montana’s Crown of the Continent E Magazine. It is issued periodically throughout the calendar year. For information contact [email protected] Morton J. Elrod: THE Naturalist Editor’s note: This excerpt comes from a major piece on which “are but remnants of the larger ice masses Morton J. Elrod that George Dennison1 is writing on one which in former ages extended far into or over of Montana’s most eminent naturalist-educators. the valley on the east and down the stream and river valleys on the western slopes.” 6 ears before he accepted the offer of a summer position in Glacier Na- e constructed a set of notes con- tional Park, Morton J. Elrod had long cerning the “First Map of Glacier since succumbed to the allure of this National Park,” identifying the 2 Y“Priceless Pleasure Ground For All.” “For him various places with and those who seeks rest,” he rhapsodized, “for him who Hwithout names. The map either did not name or loves nature, for him who is weary of urban life identify the vast majority of places—as examples and its monotony, for him who can read sermons of unnamed places, Pumpelly Glacier, Lake El- in stones, Glacier Park speaks God’s own mes- len Wilson, Oberlin Mountain, Crosby Lake and sage.” Even earlier, prior to the enactment of Ridge, Lincoln Mountain, Mount Henkel, Mount the statute creating the Park, he made scientific Altyn, Josephine Lake, Ptarmigan Lake, Helm excursions into the area in 1906, 1909, and 1910, Lake, Elizabeth Lake, Kipp Mountain, Swift arguing for designation as a national park as Current Mountain, Sue Lake, Washboard Falls, 3 the only way to preserve it.
    [Show full text]
  • Glacier Area Emergency Response Action Plan
    GLACIER AREA EMERGENCY RESPONSE ACTION PLAN PHMSA Sequence Number 2987 EPA FRP ID Number (Pending) Owner/Operator: Phillips 66 2331 City West Blvd. Houston, Texas 77042 24-Hour Number: (800) 231-2551 or (877) 267-2290 Page A7-1 Confidentiality Notice: This document is for the sole use of the intended recipient(s) and contains information that is considered to be proprietary to Phillips 66. Any unauthorized review, use, disclosure or distribution is strictly prohibited. Glacier Area Appendix 7: Response Zone Appendix ERAP Appendix 7: ERAP Table of Contents 7.1 Area Information ........................................................................................................1 7.1.1 Glacier Crude North .......................................................................................1 7.1.2 Cut Bank Station ............................................................................................ 4 7.1.3 Tank Table .....................................................................................................5 7.2 Communication Equipment ........................................................................................6 7.3 Notification Sequence ................................................................................................7 7.4 Emergency Notification Contact List ........................................................................ 10 7.5 Emergency Response Equipment, Testing & Deployment ....................................... 13 7.6 Evacuation Plan ......................................................................................................
    [Show full text]
  • 107 Part 208—Flood Control Regulations
    Corps of Engineers, Dept. of the Army, DoD § 208.10 PART 208—FLOOD CONTROL sponsible for the efficient operation REGULATIONS and maintenance of all of the struc- tures and facilities during flood periods Sec. and for continuous inspection and 208.10 Local flood protection works; mainte- maintenance of the project works dur- nance and operation of structures and fa- ing periods of low water, all without cilities. cost to the United States. 208.11 Regulations for use of storage allo- (3) A reserve supply of materials cated for flood control or navigation and/ or project operation at reservoirs subject needed during a flood emergency shall to prescription of rules and regulations be kept on hand at all times. by the Secretary of the Army in the in- (4) No encroachment or trespass terest of flood control and navigation. which will adversely affect the effi- 208.19 Marshall Ford Dam and Reservoir cient operation or maintenance of the (Mansfield Dam and Lake Travis), Colo- project works shall be permitted upon rado River, Tex. 208.22 Twin Buttes Dam and Reservoir, Mid- the rights-of-way for the protective fa- dle and South Concho Rivers, Tex. cilities. 208.25 Pensacola Dam and Reservoir, Grand (5) No improvement shall be passed (Neosho) River, Okla. over, under, or through the walls, lev- 208.26 Altus Dam and Reservoir, North Fork ees, improved channels or floodways, Red River, Okla. nor shall any excavation or construc- 208.27 Fort Cobb Dam and Reservoir, Pond (Cobb) Creek, Oklahoma. tion be permitted within the limits of 208.28 Foss Dam and Reservoir, Washita the project right-of-way, nor shall any River, Oklahoma.
    [Show full text]
  • FISHING NEWSLETTER 2020/2021 Table of Contents FWP Administrative Regions and Hatchery Locations
    FISHING NEWSLETTER 2020/2021 Table of Contents FWP Administrative Regions and Hatchery Locations .........................................................................................3 Region 1 Reports: Northwest Montana ..........................................................................................................5 Region 2 Reports: West Central Montana .....................................................................................................17 Region 3 Reports: Southwest Montana ........................................................................................................34 Region 4 Reports: North Central Montana ...................................................................................................44 Region 5 Reports: South Central Montana ...................................................................................................65 Region 6 Reports: Northeast Montana ........................................................................................................73 Region 7 Reports: Southeast Montana .........................................................................................................86 Montana Fish Hatchery Reports: .......................................................................................................................92 Murray Springs Trout Hatchery ...................................................................................................................92 Washoe Park Trout Hatchery .......................................................................................................................93
    [Show full text]
  • US Fish & Wildlife Service Revised
    U.S. Fish & Wildlife Service Revised RECOVERY PLAN for the Pallid Sturgeon (Scaphirhynchus albus) Original Plan Approved: November 1993 Prepared by: Pallid Sturgeon Recovery Coordinator U.S. Fish and Wildlife Service Montana Fish and Wildlife Conservation Office Billings, Montana For Mountain-Prairie Region U.S. Fish and Wildlife Service Denver, CO January 2014 DISCLAIMER Recovery plans delineate reasonable actions that are believed necessary to recover and/or protect listed species. Plans are prepared by the U.S. Fish and Wildlife Service, sometimes with the assistance of recovery teams, contractors, State agencies, and others. Plans are reviewed by the public and subject to additional peer review before they are adopted by the U.S. Fish and Wildlife Service. Objectives will only be attained and funds expended contingent upon appropriations, priorities, and other budgetary constraints. Recovery plans do not obligate other parties to undertake specific tasks. Recovery plans do not necessarily represent the views nor the official positions or approval of any individuals or agencies involved in the plan formulation, other than the U.S. Fish and Wildlife Service. They represent the official position of the U.S. Fish and Wildlife Service only after they have been signed by the Regional Director or Director as approved. Approved recovery plans are subject to modification as dictated by new findings, changes in species’ status, and the completion of recovery tasks. Copies of all documents reviewed in development of the plan are available in the administrative record, located at the U.S. Fish and Wildlife Service’s Montana Fish and Wildlife Conservation Office, Billings, Montana.
    [Show full text]