DOCSLIB.ORG

FINAL Supplemental Final Environmental Impact Statement

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Chapter 2 – Alternatives United States Department of FINAL Agriculture Forest Service Supplemental Final November 2011 Environmental Impact Statement Bozeman Municipal Watershed Project Bozeman Ranger District, Gallatin National Forest Gallatin County, Montana Looking north from the BMW Project area between the Hyalite and Leverich Creek divide toward Bozeman, MT. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual‟s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDAs TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250- 9410, or call (800) 795-3272 (voice) or (202)720-6382 (TDD). USDA is an equal opportunity provider and employer. 2 Chapter 2 – Alternatives Changes Between SFEIS (May 2011) and Final SFEIS (November 2011) Incorporation of the following changes and the inclusion of Appendix B – Response to Comments are the extent of the changes to the Supplemental Final Environmental Impact States (May 2011) that make up the Final SFEIS (November 2011). The Final SFEIS (November 2011) replaces SFEIS (May 2011) in its‟entirety. An errata sheet with the following updates and Appendix B will be circulated. Abstract, page v: Paragraph 1, add this sentence : The Final Supplemental EIS (November 2011) incorporates minor changes to the SFEIS and incorporates Appendix B – Response to Comments. The Final SFEIS (November 2011) replaces SFEIS (May 2011) in its‟ entirety. Replace paragraph 3 with: The Final Environmental Impact Statement (March 2010) contains all other supporting analysis. A notice of availability for this Final SFEIS will be published in the Federal Register in December and the changes will be circulated. A Record of Decision will be released shortly after the Final SFEIS (November 2011). A legal notice announcing availability of the Record of Decision will be published in the Bozeman Daily Choronicle and will initiate a 45 day administrative appeal period. Summary, page vi: Replace the last sentence of paragraph 4 and all of paragraph 5 with this paragraph: The Final SFEIS (November 2011) replaces the May 2011 version in its entirety and includes minor changes along with the agency responses to comments from the comment period in June 2011. Responses are in Appendix B of the Final SFEIS. A NOA for the Final SFEIS will be in the Federal Register in December and the decision will be published shortly thereafter. A legal notice announcing availability of the Final SFEIS and the Record of Decision will be published in the Bozeman Daily Chronicle and will initiate a 45 day administrative appeal period. Table of Contents, page viii: Add to the Table of Contents: Appendix B - Response to Comments ………………………………………………………… 244 Background, page 3: Replace paragraph 2 with: In addition, a few court cases were decided that may have implications or precedent setting findings for the BMW project. These include direction on species viability, a ninth circuit decision on the Smith Creek Fuels Reduction project concerning big game habitat components and an Oregon case (Northwest Environmental Defense Center v. Brown) concerning the use of a Clean Water Act exemption for forest roads. The reader will find a discussion of these findings in this SFEIS. Finally, based on claims raised in appeal of the February 2011 decision, it was determined that the February 2011 version of the supplemental EIS should be revised to further clarify the analysis of certain issues and to address new additions to the sensitive species list. The SFEIS was released for public comment in May 2011. The Final SFEIS (November 2011) includes Appendix B –Response to Comments and minor changes to incorporate discussion about the comment period. See the list of changes behind the cover page. The Final SFEIS (November 2011) replaces the May 2011 version in its entirety. Public Involvement, p. 5: Replace the last two paragraphs in this section with: A supplemental FEIS (SFEIS) and new Record of Decision (ROD) were published in February 2011. The SFEIS contained these additional analyses and reviews, and a correction related to sensitive plants. In May of 2011 and based on input from others in the Forest Service, the Gallatin Forest Supervisor felt it was best to offer a more formal period for the public to comment on the SFEIS before finalizing her decision. Based on claims raised in appeal of the February 2011 decision she also believed that the supplemental EIS should be revised to further clarify the analysis of certain issues and to address new additions to the sensitive species list. Therefore she chose to withdraw the February 2011 Record of Decision and released the SFEIS for public review and comment in May 2011. A Notice of Availability (NOA) of the Supplemental FEIS (May 2011) was published in the Federal Register on June 7, 2011. A legal notice announcing the comment period for the SFEIS was published in the Bozeman Daily Chronicle, which is the newspaper of record for the Gallatin National Forest. The Final SFEIS (November 2011) replaces the May 2011 version in its entirety and includes minor changes along with the agency responses to comments from the comment period in June 2011. Responses are in Appendix B of the Final SFEIS. A NOA for the Final SFEIS will be in the Federal Register in December and the decision will be published shortly thereafter. A legal notice announcing availability of the Final SFEIS and the Record of Decision will be published in the Bozeman Daily Chronicle and will initiate a 45 day administrative appeal period. Mailings will be sent to all commenters and interested persons announcing availability of the Final SFEIS, Record of Decision and administrative appeal rights. Appendix A – Header, p. 229: Fix typo in the header, replace with: Appendix A – Soil and Water Best Management Practices Appendix B –Response to Comments: Appendix B is added, pages 244-271. Note: Based on the public comment period in June/July 2011, there was no need for additional analysis in the Supplemental Final Environmental Impact Statement (May 2011). However, we are providing responses to the comments in Appendix B. The Appendix includes factual corrections, sources where comments are addressed and minor changes in the content. In accordance with CFR 1503.4 the comments, responses and changes will be circulated. The addition of minor changes to the SFEIS (May 2011) described in this section and Appendix B are the only revisions to the SFEIS since May. iv Bozeman Municipal Watershed Project Final Supplemental Environmental Impact Statement Gallatin County, Montana Lead Agency: USDA Forest Service Responsible Official: Mary C. Erickson Gallatin Forest Supervisor For Information Contact: Teri Seth NEPA Team Leader 3710 Fallon St., Ste C. Bozeman, MT (406) 522-2520 Abstract: The Supplemental Final Environmental Impact Statement (SFEIS) presents supplemental analysis to the Final EIS. The need for additional information resulted from an administrative appeal review in June 2010 and court decisions since the Final EIS and Record of Decision in March 2010. The court decisions had direct bearing on the standards and analysis for this project. This Supplement presents new information on elk and other big game species, fisheries, sensitive species, soils, water quality, weeds, management indicator species, roadless areas, climate change alternative and consideration of reasonably foreseeable actions identified since March 2010. The supplemental analysis generally discloses reduced impacts to these resources as compared to effects previously discussed; and affirms previous conclusions about the potential alternatives and compliance with current direction. The Final Supplemental EIS (November 2011) incorporates minor changes to the SFEIS and incorporates Appendix B – Response to Comments. The Final SFEIS (November 2011) replaces SFEIS (May 2011) in its‟ entirety. Six alternatives were considered: All alternatives except the No Action were designed in whole or in part to address the purpose and need for action. Alternative 1 – No Action, Alternative 2 – Proposed Action, Alternative 3 – increased treatment and effectiveness from the proposed action, Alternative 4 – Prescribed burning emphasis with small tree thinning, Alternative 5 – mitigation for scenery, west slope cut throat trout and water quality, Alternative 6 – mitigates for scenery, west slope cut throat trout and water quality while recognizing the implementation limitations associated with helicopter logging. Alternative 6 is the preferred Alternative in the FEIS. Alternative 4 is the environmentally preferred alternative but was not selected because it does not meet the purpose and need as aeffectively as other alternatives. The Final Environmental Impact Statement (March 2010) contains all other supporting analysis. A notice of availability for this Final SFEIS will be published in the Federal Register in December and the changes will be circulated. A Record
Recommended publications
  • Distribution, Biology and Harvest of Common Snipe (Capella Gallinago Delicata)

    Distribution, Biology and Harvest of Common Snipe (Capella Gallinago Delicata)

    Distribution, biology and harvest of Common Snipe (Capella gallinago delicata) in Montana by Graham Stuart Taylor A thesis submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE in Fish and Wildlife Management Montana State University © Copyright by Graham Stuart Taylor (1978) Abstract: Distribution, migration chronology, breeding biology and harvest of Common Snipe (Capella gallinago delicata) were studied during 1976 and 1977 in Montana. Seven census sites, including one intensive study site, were maintained: Jackson and Divide in southwest Montana, Helm- ville and Choteau in the westcentral portion of the state, Malta and Medicine Lake in the northeast and Belgrade, which doubled as an intensive study site, in southcentral Montana. Spring arrival dates varied from 11 April to 11 May at Belgrade and Medicine Lake, respectively. Fall migration observed at the Belgrade area peaked the last two weeks of October in both years. Breeding pair densities (pairs per 100 hectare of habitat) for each census site, based on winnowing censuses were 14 pairs at Jackson, 17 at Divide, 14 at Helmville, 21 at Choteau, 50 at Malta, 8 at Medicine Lake and 34 at Belgrade. Breeding habitat surveyed ranged in size from 269 hectares at Jackson to 26 at Malta. Based on information from 20 nests, peak hatch occurred the last week of May and the first two weeks in June at Belgrade. Ninety-five percent of twenty-one nests were successful while individual egg success was equally high at 93 percent. Clutch size averaged 4 eggs. Vegeta-tional analysis of nest sites showed a strong preference by nesting snipe for stands of Carex spp.
  • East Gallatin Nutrient Monitoring Project: Summary Report, 2017 Data Collection and ‘Site H’ Algal Spike

    East Gallatin Nutrient Monitoring Project: Summary Report, 2017 Data Collection and ‘Site H’ Algal Spike

    East Gallatin Nutrient Monitoring Project: Summary Report, 2017 Data Collection and ‘Site H’ Algal Spike 215 W. Mendenhall, Suite 300 Bozeman, MT 59715 406.582.3168 www.glwqd.org Prepared by Torie Haraldson, Water Quality Tech. Specialist January, 2019 Project Background The Gallatin Local Water Quality District (GLWQD) led water quality data collection for a modeling effort by the City of Bozeman (the City) from 2014-2016. The purpose of the model is to understand the potential implications of Montana Department of Environmental Quality’s (DEQ) Total Maximum Daily Load assessment on the City’s Montana Pollutant Discharge Elimination System permit for their water reclamation facility (WRF) that discharges to the East Gallatin River, just north of Bozeman, Montana. Modeling (by HDR of Missoula) has provided insight into nutrient processing within the river system and its potential responses to nutrient management activities. The modeling process employs the river and stream water quality model QUAL2K, which couples nutrient data with light, weather, topography, and other inputs to predict algal growth in reaches along the river continuum. A project progress report by City of Bozeman staff at the GLWQD Board of Directors May 4, 2017 meeting included results that indicated a spike in algal density at ‘Site H’, a site on the main stem of the East Gallatin River approximately 13 miles downstream of the WRF (Figure 1). Chlorophyll-a is a photosynthetic pigment that is isolated from algae samples and used to quantify algal density. Mean Algal Chlorophyll-a at Main Stem Sites, 2014-2016 200 ) 180 2 160 140 120 July August Area Area (mg/m Density 100 a - September 80 Overall Mean 60 40 Mean Chlorophyll 20 0 ← Site ID ← River mi.
  • Montana Fishing Regulations

    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
  • Fisherman Use and Fish Harvest on the West Gallatin River, Montana by Richard Seth Lyden a Thesis Submitted to the Graduate Facu

    Fisherman Use and Fish Harvest on the West Gallatin River, Montana by Richard Seth Lyden a Thesis Submitted to the Graduate Facu

    Fisherman use and fish harvest on the West Gallatin River, Montana by Richard Seth Lyden A thesis submitted to the Graduate Faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE in Fish and Wildlife Management Montana State University © Copyright by Richard Seth Lyden (1973) Abstract: Estimates of fishing intensity and yield of game fish were made on the canyon portion of the West Gallatin River, Montana during the summer fishing seasons, of 1971 and 1972» Two sections each about 11 miles long were selected for intensive study» These sections were the most accessible and most heavily fished portions of the river. An estimated 57 percent in 1971 and 36 percent in 1972 of all fisherman were interviewed. During 1971, total fisherman days per stream mile were estimated to be 181 and 224 for the upper and lower sections, respectively while during 1972 these values were 196 and 274, respectively. An increase in fishing pressure of 35 percent in the lower section was attributed to a shorter high and turbid water period in 1972. The catch varied from 5,318 fish caught in 3,305 fisherman days in section B during 1972 to 3,618 fish caught in 2,616 fisherman days in section B during 1971. The average number of fish caught per fisherman' day ranged from 1.38 to 2.02. Catch rates for wild rainbow trout ranged from 0.15 to 0.35 and for hatchery trout ranged from 0.05 to 0.30. Wild and hatchery rainbow trout combined, contributed 67.2 to 93.4 percent of the total game fish catch for both sections both years.
  • Proceedings for Science, Policy and Communication: the Role of Science in a Changing World

    Proceedings for Science, Policy and Communication: the Role of Science in a Changing World

    Proceedings for Science, Policy and Communication: The role of science in a changing world American Water Resources Association Montana Section 2017 Conference October 18 - October 20, 2017 Great Northern Hotel -- Helena, Montana Contents Thanks to Planners and Sponsors Full Meeting Agenda About the Keynote Speakers Concurrent Session and Poster Abstracts* Session 1. Surface Water Session 2. Science, Policy and Communication Session 3. Forestry Session 4. Ground Water Session 5. Restoration Session 6. Water Quality Session 7. Water Data Systems and Information Session 8. Models, Water Quality and Geochemistry Poster Session *These abstracts were not edited and appear as submitted by the author, except for some changes in font and format. 1 THANKS TO ALL WHO MAKE THIS EVENT POSSIBLE! • The AWRA Officers Aaron Fiaschetti, President -- Montana DNRC Emilie Erich Hoffman, Vice President -- Montana DEQ Melissa Schaar, Treasurer -- Montana DEQ Nancy Hystad, Executive Secretary -- Montana State University • Montana Water Center, Meeting Coordination Whitney Lonsdale And especially the conference presenters, field trip leaders, moderators, student judges and volunteers. Aaron Fiaschetti Emilie Erich Hoffman Melissa Schaar Nancy Hystad 2 A special thanks to our generous conference sponsors! 3 WEDNESDAY, OCTOBER 18, 2017 REGISTRATION 9:30 am – 7:00 pm REGISTRATION Preconference registration available at http://www.montanaawra.org/ WORKSHOP, FIELD TRIP and HYDROPHILE RUN 10:00 am - 12:00 pm Workshop: Science and Public Collaboration Led by Susan Gilbertz, Oriental Ltd. Room 1:00 pm – 5:00 pm Field Trip: Canyon Ferry - Present, Past Led by Melissa Schaar, MT DEQ and AWRA Treasurer Bus leaves Great Northern Hotel promptly at 1 pm, returns at 5 pm 5:40 pm – 7:00 pm Hydrophile 5k Run/Walk Meet at field trip bus drop off location at 5:40 or 301 S.
  • Dnrc Summary Report Sb330 Water Reservation Ten Year Review

    Dnrc Summary Report Sb330 Water Reservation Ten Year Review

    DNRC SUMMARY REPORT SB330 WATER RESERVATION TEN YEAR REVIEW June 2016 Water Resource Division Water Rights Bureau 1424 9th Avenue P.O. Box 201601 Helena, Montana 59620-1601 http://dnrc.mt.gov/divisions/water/water-rights for questions call (406) 444-6614 TABLE OF CONTENTS Project Description .............................................................................. …….. 1 Municipal Reservations ……………………………………………………………………………. 2 Yellowstone Final Order ..................................................................... 3 Lower Missouri Final Order................................................................. 5 Upper Missouri Final Order ................................................................. 6 Conservation District Reservations ……………………………………………………………. 8 Yellowstone Final Order …………………………………………………………………. 9 Lower Missouri Final Order …………………………………………………………….. 10 Upper Missouri Final Order …………………………………………………………….. 11 State & Federal Reservations ……………………………………………………………………. 11 Yellowstone Final Order …………………………………………………………………. 12 Upper Missouri Final Order ……………………………………………………………. 13 Appendix A, (Yellowstone Municipal Reservations).…………………………………. 14 Big Timber .......................................................................................…. 15 Billings ................................................................................................. 19 Broadus ............................................................................................... 23 Columbus ...........................................................................................
  • Planning Guide TOC.Pmd

    Planning Guide TOC.Pmd

    Revised in 2008 A Planning Guide for Protecting Montana’s Wetlands and Riparian Areas A Planning Guide for Protecting Montana’s Wetlands and Riparian Areas Written and Coordinated by Janet H. Ellis Jim Richard Updated June 2008 This publication is a cooperative effort of Montana Watercourse Montana Department of Environmental Quality Montana Audubon Produced By Montana Watercourse PO Box 170575 Montana State University Bozeman, MT 59717-0575 www.mtwatercouse.org (406) 994-6671 MTW-01-03 Updated 6/08 Table of Contents Acknowledgments ............................................................................................................................................. iv Acronyms........................................................................................................................................................... v Preface .............................................................................................................................................................. vi CHAPTER 1. Why Should Local Governments Protect Wetlands and Riparian Areas? The Benefits of Wetlands and Riparian Areas to Local Governments ............................................................... 1 - 1 Pollution Control of Surface Water Ground water Protection Public Health Flood Control Erosion Control Economic and Community Values Agricultural Benefits Recreational Benefits Wildlife Habitat Fisheries Threatened and Endangered Species Habitat Why Local Governments Protection Programs Make Sense ............................................................................
  • Lower Gallatin Watershed Restoration Plan

    Lower Gallatin Watershed Restoration Plan

    Lower Gallatin Watershed Restoration Plan LOWER GALLATIN WATERSHED RESTORATION PLAN prepared by Jeff Dunn, Watershed Hydrologist Karen Filipovich, Independent Consultant Katherine Boyk, Big Sky Watershed Corps RESPEC 3810 Valley Commons Drive, Suite 4 Bozeman, Montana 59718 prepared for Greater Gallatin Watershed Council P.O. Box 751 300 North Willson Avenue, Basement Suite E Bozeman, Montana 59715 December 22, 2014 Lower Gallatin Watershed Restoration Plan TABLE OF CONTENTS Table of Contents ........................................................................................................................................... i List of Tables ................................................................................................................................................ iii List of Figures ............................................................................................................................................... iii Attachments ................................................................................................................................................. iii 1.0 Introduction ............................................................................................................................................ 1 1.1 EPA’s Nine Minimum Elements ........................................................................................................... 2 1.2 Progress Evaluation ............................................................................................................................
  • Gallatin County, Montana Hazard Mitigation Plan Final Draft

    Gallatin County, Montana Hazard Mitigation Plan Final Draft

    GALLATIN COUNTY, MONTANA HAZARD MITIGATION PLAN FINAL DRAFT PREPARED FOR Gallatin County, Montana 311 W. Main Street Bozeman, MT 59715 APRIL 2019 Photo Credit: Gallatin County Emergency Management EXECUTIVE SUMMARY Disasters can strike at any time in any place. In many cases, actions can be taken before disasters strike to reduce or eliminate potential negative impacts. These actions can often mitigate the adverse effects of disasters and protect life, property, the economic and other values. The Gallatin County Hazard Mitigation Plan (HMP) addresses 19 major hazards with respect to risk and vulnerabilities countywide, including the communities of Bozeman, Belgrade, Big Sky, Manhattan, Three Forks, and West Yellowstone. Through a collaborative planning process, the Gallatin County hazards were identified, researched, profiled, and prioritized. In addition, Montana State University (MSU) elected to update their 2013 Pre- Disaster Mitigation (PDM) Plan as an annex to the county’s HMP. The MSU Annex is designated as Annex A and is included in its entirety following the HMP Sections. The major hazards are each profiled in terms of their hazard description, history, probability and magnitude, mapping, vulnerabilities, data limitations, and other factors. The vulnerabilities to critical facilities; critical infrastructure; structures; the population; economic, ecologic, historic, and social values; and future development are updated for each hazard. Based on the probability and extent of potential impacts that were identified in the risk assessment, the prioritizations of hazards within Gallatin County are displayed in Table ES-1. The countywide prioritizations are derived from hazard prioritization and ranking exercises held in five distinct community areas (districts) across the county in February 2018.
  • Gallatin River Channel Migration Mapping

    Gallatin River Channel Migration Mapping

    December 31, 2017 Gallatin River Channel Migration Mapping Prepared by: Karin Boyd Applied Geomorphology, Inc. Prepared for: 211 N Grand Ave, Suite C Bozeman, MT 59715 Ruby Valley Conservation District P.O. Box 295 Sheridan, MT 59749 Tony Thatcher DTM Consulting, Inc. 211 N Grand Ave, Suite J Bozeman, MT 59715 Abstract This report contains the results of a Channel Migration Zone (CMZ) mapping effort for the Gallatin River from the Highway 191 bridge at the mouth of Gallatin Canyon its confluence with the Missouri River at Missouri River Headwaters State Park in Three Forks, Montana. The Gallatin River is a coarse grained, dynamic river system that shows active channel migration and avulsion processes. Maximum migration distances since 1965 exceed 600 feet in some areas, with average migration distances for that time frame typically exceeding 200 feet. As a result, 100-year erosion hazard area buffer widths range from 80 feet just below the mouth of Gallatin Canyon where the channel is geologically confined to about 500 feet from Norris Road to Headwaters State Park. The river tends to support multiple channels that are also dynamic, with new channels forming and older channels becoming frequently abandoned. Those changes were measured as a total of 63 avulsion events between 1965 and 2015. The avulsions formed within the woody riparian corridor, through ditches, and in grassy floodplain areas. The new channels range in length from hundreds of feet to over a mile long, and once they form they commonly rapidly enlarge and migrate laterally. Upstream of the I-90 bridge, mile-long avulsions have relocated the river over a thousand feet laterally across its floodplain.
  • East Gallatin River Channel Migration Mapping

    East Gallatin River Channel Migration Mapping

    December 31, 2017 East Gallatin River Channel Migration Mapping Prepared by: Tony Thatcher DTM Consulting, Inc. Prepared for: 211 N Grand Ave, Suite J Bozeman, MT 59715 Ruby Valley Conservation District P.O. Box 295 Sheridan, MT 59749 Karin Boyd Applied Geomorphology, Inc. 211 N Grand Ave, Suite C Bozeman, MT 59715 Abstract This report contains the results of a Channel Migration Zone (CMZ) mapping effort for the East Gallatin River from Bridger Creek to its confluence with the Gallatin River north of Manhattan, Montana. The study covers 41.4 river miles. The East Gallatin River has undergone extensive agricultural and residential development within the project reach. About 4.5 miles of bank armor have been mapped between Bridger Creek and the mouth, and that is probably a conservative estimate due to the long history of manipulation on the river. By 1965 much of the riparian corridor had been cleared and substantial sections of river had been channelized (straightened). Although the CMZ has been encroached into by various land uses, segments of the river remain very dynamic, with channel migration and avulsions common. Migration distances measured for the 50 years from 1965-2015 are typically between 50-100 feet, but in some areas migration measurements between 250 and 400 feet are common. Some of the areas of more rapid migration were historically channelized, reflecting the tendency for a straightened stream to regain length and re-establish an equilibrium slope. A total of 33 avulsions were mapped between 1965 and 2015, with another nine sites that appear to be highly susceptible to such an event in the coming decades.
  • The Responses of Insect Communities in the East

    The Responses of Insect Communities in the East

    The responses of insect communities in the East Gallatin River, Montana, to sewage effluents by Thomas Harvey Glorvigen A thesis submitted to the Graduate Faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE in Zoology Montana State University © Copyright by Thomas Harvey Glorvigen (1972) Abstract: The responses of insect communities in the East Gallatin River, Montana, to two sewage effluents were studied. Numbers of Ephemer-optera, Plecoptera and Trichoptera were low and numbers of Diptera were high 0.72 km below Outfall I. The diversity index of this community was low. The community structure was believed to be primarily due to the abundant growths of "sewage fungus" present. Mayflies appeared to increase in numbers rapidly at Station 2 shortly after the use of Outfall I was discontinued. Nine months later the diversity index at this location was similar to those of the other stations. There was no apparent effect of the sewage effluent from Outfall II on the insect community 6.32 km below it. Statement of Permission to Copy In presenting this thesis in partial fulfillment, of the require­ ments for an advanced degree at Montana State University, I agree that the Library shall make it freely available for inspection. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by my major professor, or, in his absence, by the Director of. Libraries. It is understood that any copying or publication of this thesis for financial gain shall not be allowed without my written permission. Signature Date c .