DOCSLIB.ORG

Discover the Potomac Gorge

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Discover the Potomac Gorge Discover the Potomac Gorge: A National Treasure n the outskirts of Washington, D.C., O the Potomac River passes through a landscape of surprising beauty and ecological significance. Here, over many millennia, an unusual combination of natural forces has produced a unique corridor known as the Potomac Gorge. This 15-mile river stretch is one of the country’s most biologically diverse areas, home to more than 1,400 plant species. Scientists have identified at least 30 distinct natural vegetation communities, several of which are globally rare and imperiled. The Gorge also supports a rich array of animal life, from rare invertebrates to the bald eagle and fish like the American shad. g g n n In total, the Potomac Gorge provides habitat to i i m m e e l l F F more than 200 rare plant species and natural . P P y y r r communities, making it one of the most important a a G G © © natural areas in the eastern United States. The heart of the Potomac Gorge is also known as Mather Gorge, named This riverside prairie at Great Falls, Virginia, results from periodic river flooding, after Stephen T. Mather, first director of the National Park Service. a natural disturbance that creates and sustains rare habitats. g g g n n n i i i e n m m m e r y e e e l l l a e l F F F P C . y e P P P e L y y y v f r r r r f a a a a e G G H G J © © © © © Flowering dogwood, a native forest understory species in our Specially adapted to withstand river The Potomac Gorge is home to Clinging precariously to the cliff’s edge, Brightly colored in its immature form, a reptile known as the region, is being decimated by an introduced fungal disease. flooding and scouring, rare plants like myriad bird species, from mig- Virginia pine is a characteristic species of five-lined skink is a regular sight in the Potomac Gorge. riverbank goldenrod take root and ratory songbirds to our national the rare bedrock terrace woodland of Great survive in rock crevices. emblem, the bald eagle. Falls and Bear Island. WHAT IS THE POTOMAC GORGE? BE SAFE AND Over thousands of years, natural forces at dangerous rapids known as Great Falls — the of the longest, steepest fall zones on FOLLOW THE PARK RULES work in the Potomac Gorge have created a water level drops 60 feet in a half-mile stretch. the Atlantic slope. Despite its location in deep, narrow valley. Here, rainwater the Washington, D.C. metro region, the • It is unlawful to enter the Potomac River While a fall zone is characteristic of many gathered from an approximately 11,500- Potomac Gorge has one of the and C&O Canal from National Park lands U.S. east coast rivers, the Potomac has one square mile area upstream is funneled continent’s most intact fall zones, for wading, swimming, or bathing. The river through a constricted passageway, where unaffected by major dams and largely is extremely dangerous at all water levels, plants have adapted the ability to survive in unspoiled by riverfront development. especially near dams, falls, and rapids. the face of intense flood scouring. River currents are strong and unpredictable. Large rainstorms and melting snows A crossroads for plants and animals, this upriver regularly produce powerful •Stay on marked trails. Bicycles and area also supports a many different flooding in the Gorge. At times, horses are allowed only on designated habitats, including scoured bedrock river floodwaters rise high enough to wash trails. Check with each park for specific terraces, mature upland woods, rich over the Gorge’s 50–foot cliffs, but even rules before you visit. floodplain forests, streams, and wetlands. lesser floods can scour the river’s • Pet owners must keep dogs on leash in It is this diversity of life that makes the ancient bedrock terraces, filling side all park areas and must remove their pets’ Gorge a nationally significant conservation channels and inland ravines. Moreover, waste. Dogs are prohibited on Olmsted area. floods wash away years or decades of Island, Bear Island, and the Billy Goat Trail plant growth, rearrange soils and plants, d The Potomac Gorge is located in the “fall n Section A. a and deposit new sediments and seeds g zone,” where the river passes from the e i in their place. • Damaging, disturbing, collecting, or W hard, erosion-resistant bedrock of the . H removing natural, cultural, archaeological, . Piedmont to the softer, sandy deposits of R The Potomac Gorge is a dynamic, and paleontological resources is prohibited. the Atlantic Coastal Plain. Over this 15–mile © highly disturbed environment, yet this corridor, the river drops from an elevation The unique geology, geography, and hydrology of the disturbance is a natural process and • Keep off archaeological and historic re- of 140 feet to 10 feet above sea level. At its Potomac Gorge produce its array of rare species and critical to the extraordinary natural sources unless explicitly permitted by parks. steepest point — the fast-flowing, diversity of the Gorge. natural communities. • Keep wildlife wild; don’t feed the animals. • Poisonous snakes and other wildlife live WHO OWNS AND CARES FOR THE POTOMAC GORGE? in the park. Watch where you put your hands and feet, particularly in rocky areas. We’re all responsible for the Gorge. Much of Public parkland in the Gorge includes the public infrastructure runs through the Gorge the Potomac Gorge’s 15–mile shoreline is National Park Service’s Chesapeake & Ohio — including water, sewer, gas, and power • Hunting and trapping in park areas are public parkland, where park managers Canal National Historical Park and George lines — providing critical services to the D.C. prohibited; fishing is subject to state or D.C. protect natural and cultural resources and Washington Memorial Parkway, which metro region population. While much of the licensing regulations. provide recreational opportunities for current administers Turkey Run Park, Great Falls Gorge’s immediate riverfront property is • Camping and campfires are permitted and future generations to enjoy. The river Park, and Glen Echo Park. In Virginia, the “protected” by being publicly owned and not only in designated areas. itself belongs to the State of Maryland, Fairfax County Park Authority oversees vulnerable to private development, it still extending back to colonial times. However, Riverbend Park and Scotts Run Nature faces a number of threats. • Alcohol, firearms, and metal detectors are responsibility for long-term stewardship of the Preserve, and there are several county prohibited in park areas. Gorge belongs to all who visit or live around stream valley parks on both sides of the river. this important natural area. Two private nonprofit conservation groups are active in the Gorge. The Nature Conservancy co–owns Bear Island, home of the popular Billy Goat Trail, with the National SELECTED Park Service. Potomac Conservancy owns e ATTRACTIONS c i Minnie’s Island and administers the C&O v r e S Canal’s Lockhouse 8 Learning Center. George Washington Memorial Parkway k r a P Other public and private lands are included in d l Great Falls Park (VA) n a a n the nearly 10,000–acre area that’s the focus o g Hiking, picnicking, kayaking, rock i t e i a of conservation action in the Potomac Gorge. climbing, bicycling, and horseback N W . y Many homes and businesses exist in and s H riding. e . t r around the Gorge, as well as schools, R u 703-285-2965 o © C hospitals, and other institutions. Important www.nps.gov/gwmp/grfa Paddlers putting in from the Park rangers guide visitors at Great Falls. Turkey Run Park Angler’s Inn access area. Hiking, picnicking, spring wildflowers. 703-289-2500 WHAT ARE THE THREATS TO THE POTOMAC GORGE? www.nps.gov/gwmp/vapa/turkey.htm Several factors threaten the natural resources This oasis in the middle of an urban environ- Fort Marcy & Theodore Roosevelt Island e c i Hiking and historic interpretation. of the Gorge. More than 250 introduced v ment faces ongoing threats from human r e nonnative species, including garlic mustard, S activity as well. Stresses include expanding 703-289-2500 t s Japanese honeysuckle, and kudzu crowd e residential and commercial development, www.nps.gov/gwmp/home.htm r o F out native plants. The region's large deer road and utility construction, and increased Glen Echo Park A population harms natural areas by D demand for water. Within the parks, high S Dance, theater, and art classes. U g / n overeating native vegetation, altering natural t levels of visitor use create pressure to build i t Call 301-492-6229 e m g habitats, and preventing tree regeneration. e additional infrastructure, such as parking l www.nps.gov/glec g F a l Introduced plant diseases like dogwood . lots. And insensitive recreational practices C P Clara Barton National Historic Site y y l r anthracnose also take a toll on native l can destroy natural areas by trampling a Home of American Red Cross founder. a S G vegetation. vegetation, fragmenting habitats, and Call 301-492-6245 © © promoting the spread of invasive species. www.nps.gov/clba Kudzu White-tailed deer HOW CAN WE PROTECT THE POTOMAC GORGE? C&O Canal National Historical Park As one of the more than restore the parks’ resources. Be safe and For more information, get the Good Neighbor Georgetown Visitor Center two million people who follow the park rules. Above all, practice Handbook: A Guide to River Friendly Living in Canal towpath open to hiking and visit the Potomac Gorge “Leave No Trace” sensitive recreational use the Middle Potomac Region, on The Nature biking.
Load more

Recommended publications
  • Park Sites of the George Washington Memorial Parkway
    National Park Service Park News and Events U.S. Department of the Interior Virginia, Maryland and Potomac Gorge Bulletin Washington, D.C. Fall and Winter 2017 - 2018 The official newspaper of the George Washington Memorial Parkway Edition George Washington Memorial Parkway Visitor Guide Drive. Play. Learn. www.nps.gov/gwmp What’s Inside: National Park Service U.S. Department of the Interior For Your Information ..................................................................3 George Washington Important Phone Numbers .........................................................3 Memorial Parkway Become a Volunteer .....................................................................3 Park Offices Sites of George Washington Memorial Parkway ..................... 4–7 Alex Romero, Superintendent Partners and Concessionaires ............................................... 8–10 Blanca Alvarez Stransky, Deputy Superintendent Articles .................................................................................11–12 Aaron LaRocca, Events ........................................................................................13 Chief of Staff Ruben Rodriguez, Park Map .............................................................................. 14-15 Safety Officer Specialist Activities at Your Fingertips ...................................................... 16 Mark Maloy, Visual Information Specialist Dawn Phillips, Administrative Officer Message from the Office of the Superintendent Jason Newman, Chief of Lands, Planning and Dear Park Visitors,
    [Show full text]
  • Site Report: Alexandria Federal Courthouse, Phase I
    Alexandria' Federal Courthouse Phase I Historical and Archaeological Investigation' Alexandria, Virgi,nia ;~?~: :fr<,»1:' ~/ v" \~ :"::;~, <"' ,'" Submitted to Sverdrup Corporation ' Arlington, Virginia for General- Services Administration Washington, D.C. i',';' , ":" .•. ,, . June 19S1 'FW020 Engineering-Science, Inc. 1133 Fifteenth Street, N.W. Washington, D.C. 20005 ALEXANDRIA FEDERAL COURTHOUSE PHASE I HISTORICAL AND ARCHAEOLOGICAL INVESTIGATION ALEXANDRIA, VIRGINIA Madeleine Pappas Janice G.Artemel Elizabeth A. Crowell June 1991 " • Submitted to Sverdrup Corporation Arlington, Virginia for General Services Administration Washington, D.C. Engineering-Science, Inc. 1133 Fifteenth Street, N.W. Washington, D.C. 20005 • ) . J Alex{llIdria Federal Courthouse Phase I Ardzaeological Investigation • TABLE OF CONTENTS Table of Contents 1 List of Figures II List of Plates . III Acknowledgements IV I. Introduction A ProjeCt Location and Description 1 B. Methodology and Research Orientation 1 II. Existing Conditions 4 A .Climate 4 B. Geology and Soils 4 C. Stratigraphy 5 ill. Previous Investigations 11 IV. Previous Land Use 14 A. Prehistoric Summary 14 B. Historic Background 18 C. Project Area Property Title History 37 /V. Evaluation of Resources 41 • A Summary of Previous Site Use 41 B. Analysis of Subsurface Testing 42 C. Prehistoric Archaeological Potential 44 D. Historic Archaeological Potential 45 E. Summary of Archaeological Potential at BlockI 48 VI. Recommendations 51 Bibliography 54 , Appendices 63 A. List of Personnel 63 B. Resumes of Key Personnel 64 • Alexandria Federal Cowthouse Phase I Archaeological Investigation 11 LIST OF FIGURES • 1 . Project Location 2 2. Soil Borings 6 3. VVestAJexandria, 1804 20 4. AJexandria, 1845 23 5. U.S. Army Encampments South and VVest of AJexandria, 1861 25 6.
    [Show full text]
  • Marilandica, Summer/Fall 2002
    MARILANDICA Journal of the Maryland Native Plant Society Vol. 10, No. 2 Summer/Fall 2002 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Marilandica Journal of the Maryland Native Plant Society The Maryland Native Volume 10, Number 2 Summer/Fall 2002 Plant Society ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (MNPS) is a nonprofit organization that uses education, research, and Table of Contents community service to increase the awareness and appreciation of Native Woody Flora of Montgomery County native plants and their habitats, By John Mills Parrish leading to their conservation and Page 3 restoration. Membership is open to ~ all who are interested in Maryland’s MNPS Field Botany Updates native plants and their habitats, preserving Maryland’s natural By Rod Simmons, Cris Fleming, John Parrish, and Jake Hughes heritage, increasing their knowledge Page 8 of native plants, and helping to ~ further the Society’s mission. In Search of Another Orchid Species By Joseph F. Metzger, Jr. MNPS sponsors monthly meetings, Page 11 workshops, field trips, and an ~ annual fall conference. Just Boil the Seeds By James MacDonald Page 13 Maryland Native Plant Society ~ P.O. Box 4877 MNPS Contacts Silver Spring, MD 20914 www.mdflora.org Page 15 ~ Some Varieties of Andropogon virginicus and MNPS Executive Officers: Andropogon scoparius By M.L. Fernald, Rhodora, Vol. 37, 1935 Karyn Molines-President Page 16 Louis Aronica-Vice President Marc Imlay-Vice President Roderick Simmons-Vice President Jane Osburn-Secretary Jean Cantwell-Treasurer MNPS Board Of Directors: Carole Bergmann Blaine Eckberg Cris Fleming Jake Hughes Carol Jelich Dwight Johnson James MacDonald Joe Metzger, Jr. Lespedeza repens John Parrish Mary Pat Rowan Submissions for Marilandica are welcomed. Word documents are preferred but Louisa Thompson not necessary.
    [Show full text]
  • Northern Virginia
    NORTHERN VIRGINIA SALAMANDER RESORT & SPA Middleburg WHAT’S NEW American soldiers in the U.S. Army helped create our nation and maintain its freedom, so it’s only fitting that a museum near the U.S. capital should showcase their history. The National Museum of the United States Army, the only museum to cover the entire history of the Army, opened on Veterans Day 2020. Exhibits include hundreds of artifacts, life-sized scenes re- creating historic battles, stories of individual soldiers, a 300-degree theater with sensory elements, and an experiential learning center. Learn and honor. ASK A LOCAL SPITE HOUSE Alexandria “Small downtown charm with all the activities of a larger city: Manassas DID YOU KNOW? is steeped in history and We’ve all wanted to do it – something spiteful that didn’t make sense but, adventure for travelers. DOWNTOWN by golly, it proved a point! In 1830, Alexandria row-house owner John MANASSAS With an active railway Hollensbury built a seven-foot-wide house in an alley next to his home just system, it’s easy for to spite the horse-drawn wagons and loiterers who kept invading the alley. visitors to enjoy the historic area while also One brick wall in the living room even has marks from wagon-wheel hubs. traveling to Washington, D.C., or Richmond The two-story Spite House is only 25 feet deep and 325 square feet, but on an Amtrak train or daily commuter rail.” NORTHERN — Debbie Haight, Historic Manassas, Inc. VIRGINIA delightfully spiteful! INSTAGRAM- HIDDEN GEM PET- WORTHY The menu at Sperryville FRIENDLY You’ll start snapping Trading Company With a name pictures the moment features favorite like Beer Hound you arrive at the breakfast and lunch Brewery, you know classic hunt-country comfort foods: sausage it must be dog exterior of the gravy and biscuits, steak friendly.
    [Show full text]
  • Potomac Gorge Side 2
    Discover the Potomac Gorge: A National Treasure On the outskirts of Washington, D.C., the Potomac River passes through a landscape of surprising beauty and ecological significance. Here, over many millennia, an unusual combination of natural forces has produced a unique corridor known as the Potomac Gorge. This 15-mile river stretch is one of the country’s most biologically diverse areas, home to more than 1,400 plant species. Scientists have identified at least 30 distinct natural vegetation communities, several of which are globally rare and imperiled. The Gorge also supports a rich array of animal life, from rare invertebrates to the bald eagle and fish like the American shad. In total, the Potomac Gorge provides habitat to more than 200 rare plant species and natural communities, making it one of the most important natural areas in the eastern United States. © Gary P. Fleming P. Fleming © Gary © Gary P. Fleming The heart of the Potomac Gorge is also known as Mather Gorge, named This riverside prairie at Great Falls, Virginia, results from periodic river flooding, after Stephen T. Mather, first director of the National Park Service. a natural disturbance that creates and sustains rare habitats. © Gary P. Fleming Fleming P. © Gary Payne © Harvey P. Fleming © Gary LeClere © Jeff © Gary P. Fleming P. Fleming © Gary Flowering dogwood, a native forest understory species in our Specially adapted to withstand river The Potomac Gorge is home to Clinging precariously to the cliff’s edge, Brightly colored in its immature form, a reptile known as the region, is being decimated by an introduced fungal disease.
    [Show full text]
  • Scenic Landforms of Virginia
    Vol. 34 August 1988 No. 3 SCENIC LANDFORMS OF VIRGINIA Harry Webb . Virginia has a wide variety of scenic landforms, such State Highway, SR - State Road, GWNF.R(T) - George as mountains, waterfalls, gorges, islands, water and Washington National Forest Road (Trail), JNFR(T) - wind gaps, caves, valleys, hills, and cliffs. These land- Jefferson National Forest Road (Trail), BRPMP - Blue forms, some with interesting names such as Hanging Ridge Parkway mile post, and SNPMP - Shenandoah Rock, Devils Backbone, Striped Rock, and Lovers Leap, National Park mile post. range in elevation from Mt. Rogers at 5729 feet to As- This listing is primarily of those landforms named on sateague and Tangier islands near sea level. Two nat- topographic maps. It is hoped that the reader will advise ural lakes occur in Virginia, Mountain Lake in Giles the Division of other noteworthy landforms in the st& County and Lake Drummond in the City of Chesapeake. that are not mentioned. For those features on private Gaps through the mountains were important routes for land always obtain the owner's permission before vis- early settlers and positions for military movements dur- iting. Some particularly interesting features are de- ing the Civil War. Today, many gaps are still important scribed in more detail below. locations of roads and highways. For this report, landforms are listed alphabetically Dismal Swamp (see Chesapeake, City of) by county or city. Features along county lines are de- The Dismal Swamp, located in southeastern Virginia, scribed in only one county with references in other ap- is about 10 to 11 miles wide and 15 miles long, and propriate counties.
    [Show full text]
  • 8. Terrain and the Battle of Fredericksburg, December 13, 1862
    6. The Incision History of a Passive Margin River, the Potomac Near Great Falls By Paul Bierman,1 E-an Zen,2 Milan Pavich,3 and Luke Reusser1 Introduction done at the Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, Ca., in This field trip focuses on the emerging significance of collaboration with Robert Finkel. complex geomorphic processes that have operated in a pas- sive margin setting in the mid-Atlantic region (fig. 1A). The application of cosmogenic exposure dating to understanding the responses of rivers to Quaternary tectonic, eustatic, and Regional Framework: The Complexity of climatic variations is providing unprecedented information Passive Margin Settings about landscape histories. This trip presents new information about the response of the Potomac River to regional variabili- Passive margins, the trailing edges of continental plates, ty in sea level and climate over the late Pleistocene and are geomorphically complex. Despite the absence of active Holocene. We present a regional framework, field observa- tectonics, passive margins exhibit features such as great tions of the morphology of the Potomac River gorge below escarpments (Matmon and others, 2002; Bank and others, Great Falls (fig. 1B), and data on the age relations of strath 2001), river gorges, and marine terraces (Flint, 1940; Cooke, terraces associated with the Potomac River gorge. 1952). New analytical techniques, such as fission track ther- mochronology (Naeser and others, 2001) and cosmogenic iso- tope exposure dating (Bierman and others, 2002) are provid- Acknowledgments ing insights into the processes that control passive margin evolution. Passive margins exhibit both stable and active fea- We want to recognize the exceptional contributions of tures.
    [Show full text]
  • Courier-V35n10.Pdf
    COURIER COVER This month's cover photo, taken by (DURIER Harpers Ferry Center photographer NEWSMAGAZINE OF THE NATIONAL PARK SERVICE Ashton Graham, exemplifies some of the vigor Volume 35, Number 10 October 1990 and enthusiasm that goes into an HFC produc­ tion. Although this "Spaniard" is not dressed in the typical clothing of the day, his enthusiasm makes up for the minor details. Other actors in San Juan NHS's soon-to-be released film come closer to the "real thing," as indicated by the photo spread which begins on page 9. FEATURES STAFF Mary Maruca — Editor THE IMAGES STILL WORK 500 YEARS LATER — 5 Ricardo Lewis — Art & Production WHY TAKE A TRIP TO BOUNTIFUL - WONT ANAHEIM DO? — 9 RANGERS BRING HISTORY TO LIFE ADVISORS AT INDEPENDENCE NHP — 12 George J. Bcrklacy — Associate Publisher Theresa Wood — Executive Director, E&AA NPS EMPLOYEE FINDS DREAM CAREER Naomi Hunt — E&AA Editor AT CHANNEL ISLANDS — 16 Editorial Offices — 202/208-4996 A SENSE OF SOLITUDE — 18 FTS - 268-4996 NEW DIRECTIONS — 20 National Park Service U.S. Department of the Interior DEPARTMENTS COMMENTARY — 2 PARK BRIEFS —21 NPS PEOPLE —23 E&AA —27 The Director's Report COLUMBUS' LEGACY This month we observe Columbus Day, and I the encounter between the many Indian cultures thought it a good time to focus attention on some in the Americas and the Europeans. of the many programs and efforts already begun In interpreting the Columbus Quinccntenni­ in preparation for the Columbus Quinccntennial. al and the role the Spanish have played in our As we all learned as children, "In fourteen hun­ history, we have the complex task of recogniz­ dred and ninety-two, Columbus sailed the ocean ing and dealing not only with their role, but all blue." Thus, 1992 will be the 500th anniversary the dimensions and facets of our history.
    [Show full text]
  • Corridor Analysis for the Potomac Heritage National Scenic Trail in Northern Virginia
    Corridor Analysis For The Potomac Heritage National Scenic Trail In Northern Virginia June 2011 Acknowledgements The Northern Virginia Regional Commission (NVRC) wishes to acknowledge the following individuals for their contributions to this report: Don Briggs, Superintendent of the Potomac Heritage National Scenic Trail for the National Park Service; Liz Cronauer, Fairfax County Park Authority; Mike DePue, Prince William Park Authority; Bill Ference, City of Leesburg Park Director; Yon Lambert, City of Alexandria Department of Transportation; Ursula Lemanski, Rivers, Trails and Conservation Assistance Program for the National Park Service; Mark Novak, Loudoun County Park Authority; Patti Pakkala, Prince William County Park Authority; Kate Rudacille, Northern Virginia Regional Park Authority; Jennifer Wampler, Virginia Department of Conservation and Recreation; and Greg Weiler, U.S. Fish and Wildlife Service. The report is an NVRC staff product, supported with funds provided through a cooperative agreement with the National Capital Region National Park Service. Any assessments, conclusions, or recommendations contained in this report represent the results of the NVRC staff’s technical investigation and do not represent policy positions of the Northern Virginia Regional Commission unless so stated in an adopted resolution of said Commission. The views expressed in this document are those of the authors and do not necessarily reflect the views of the jurisdictions, the National Park Service, or any of its sub agencies. Funding for this report was through a cooperative agreement with The National Park Service Report prepared by: Debbie Spiliotopoulos, Senior Environmental Planner Northern Virginia Regional Commission with assistance from Samantha Kinzer, Environmental Planner The Northern Virginia Regional Commission 3060 Williams Drive, Suite 510 Fairfax, VA 22031 703.642.0700 www.novaregion.org Page 2 Northern Virginia Regional Commission As of May 2011 Chairman Hon.
    [Show full text]
  • Arlington County, Virginia (All Jurisdictions)
    VOLUME 1 OF 1 ARLINGTON COUNTY, VIRGINIA (ALL JURISDICTIONS) COMMUNITY NAME COMMUNITY NUMBER ARLINGTON COUNTY, 515520 UNINCORPORATED AREAS PRELIMINARY 9/18/2020 REVISED: TBD FLOOD INSURANCE STUDY NUMBER 51013CV000B Version Number 2.6.4.6 TABLE OF CONTENTS Volume 1 Page SECTION 1.0 – INTRODUCTION 1 1.1 The National Flood Insurance Program 1 1.2 Purpose of this Flood Insurance Study Report 2 1.3 Jurisdictions Included in the Flood Insurance Study Project 2 1.4 Considerations for using this Flood Insurance Study Report 2 SECTION 2.0 – FLOODPLAIN MANAGEMENT APPLICATIONS 13 2.1 Floodplain Boundaries 13 2.2 Floodways 17 2.3 Base Flood Elevations 18 2.4 Non-Encroachment Zones 19 2.5 Coastal Flood Hazard Areas 19 2.5.1 Water Elevations and the Effects of Waves 19 2.5.2 Floodplain Boundaries and BFEs for Coastal Areas 21 2.5.3 Coastal High Hazard Areas 21 2.5.4 Limit of Moderate Wave Action 22 SECTION 3.0 – INSURANCE APPLICATIONS 22 3.1 National Flood Insurance Program Insurance Zones 22 SECTION 4.0 – AREA STUDIED 22 4.1 Basin Description 22 4.2 Principal Flood Problems 23 4.3 Non-Levee Flood Protection Measures 24 4.4 Levees 24 SECTION 5.0 – ENGINEERING METHODS 27 5.1 Hydrologic Analyses 27 5.2 Hydraulic Analyses 32 5.3 Coastal Analyses 37 5.3.1 Total Stillwater Elevations 38 5.3.2 Waves 38 5.3.3 Coastal Erosion 38 5.3.4 Wave Hazard Analyses 38 5.4 Alluvial Fan Analyses 39 SECTION 6.0 – MAPPING METHODS 39 6.1 Vertical and Horizontal Control 39 6.2 Base Map 40 6.3 Floodplain and Floodway Delineation 41 6.4 Coastal Flood Hazard Mapping 51 6.5 FIRM
    [Show full text]
  • 2015 Corridor Analysis of the Potomac Heritage National Scenic Trail in Northern Virginia
    2015 Corridor Analysis Of the Potomac Heritage National Scenic Trail in Northern Virginia 0 http://www.novaregion.org/index.aspx?nid=299 Acknowledgements The Northern Virginia Regional Commission (NVRC) thanks the following individuals for their contributions to this report: • Donald Briggs, Superintendent of the Potomac Heritage National Scenic Trail for the National Park Service; • Ursula Lemanski, Rivers, Trails and Conservation Assistance Program for the National Park Service; • Mark Novak, Loudoun County Park Authority; • Debbie Andrews of Prince William County Department of Parks and Recreation; and • Members of the Potomac Heritage Trail Association. The report is an NVRC staff product, supported with funds provided by a cooperative agreement with the National Capital Region National Park Service (Grant Cooperative Agreement P14AC01704). Any assessments, conclusions, or recommendations contained in this report represent the results of the NVRC staff’s technical investigation and do not represent policy positions of the Northern Virginia Regional Commission unless so stated in an adopted resolution of said Commission. The views expressed in this document are those of the authors and do not necessarily reflect the views of the jurisdictions, the National Park Service, or any of its sub agencies. Report prepared by: Corey Miles, Senior Environmental Planner Northern Virginia Regional Commission Debbie Spiliotopoulos, Senior Environmental Planner Northern Virginia Regional Commission Figure 1 Potomac Heritage National Scenic Trail Corridor 1 http://www.novaregion.org/index.aspx?nid=299 The Northern Virginia Regional Commission 2015 Commissioners Listed by Jurisdiction (As of December 2015) Commissioners are appointed by and from the governing bodies of NVRC’s member localities on a population-based representation formula.
    [Show full text]
  • 46 Pola Negri in 1927
    Courtesy LofC, Prints & Photo Div, LC-DIG-ggbain-37938 Pola Negri in 1927 46 ARLINGTON HISTORICAL MAGAZINE Pola Negri Slept Here? Unraveling the Mystery of a Screen Siren's Stay in Arlington BY JENNIFER SALE CRANE With Arlington having few Hollywood connections to boast of, save For­ rest Tucker, Warren Beatty, Shirley MacLaine, and Sandra Bullock, the story about a modest stone bungalow nestled in the Gulf Branch stream valley off of Military Road is curious indeed. According to a long-held local legend, silent film star Pola Negri once stayed there. Local accounts have varied- some say the house was rented by Negri as her "Virginia hideaway," others think it was built as Negri and Rudolph Valen­ tino's love nest, and played host to Hollywood-style pool parties. The cozy bungalow at 3608 N. Military Road, 1 with quite a few additions and alterations, is now home to the Gulf Branch Nature Center, established in 1966 and operated by Arlington County Department of Parks, Recreation and Cultural Resources. The swimming pool, filled in and planted with a garden, can still be identified by the exposed segments of its curved concrete walls. The Nature Center's connection to the early Hollywood star was investi­ gated in the 1970s by ComeliaB. Rose, Jr., a founding member of the Arlington Historical Society. Rose's documentation leaves a few questions unanswered. But despite the lack of unequivocal primary source evidence, the story of Pola egri and the Gulf Branch Nature Center has become an important part of the oral tradition of Arlington County.
    [Show full text]