Category Archives: AEG

AEG: Ground Vibration Control from Explosives Demolition of the Kosciuszko Bridge

Association of Environmental & Engineering Geologists

D.C. – Maryland – Virginia Chapter (

Thursday, November 16, 2017, from 5:30 PM to 7:45 PM
at Brewer’s Alley in Frederick, MD

AEG Members $40, Non-members $45 (includes dinner; student and retiree discounts available). Please RSVP by Monday, November 13, via email ( or via online payment (

Patrick T. Hastings, G.I.T. and David K. Miller, P.G.

Seismic Surveys, Inc.

Ground Vibration Control from Explosives Demolition of the Kosciuszko Bridge

The project involved designing and building the new eastbound structures of Interstate 278 over the Newtown Creek from Brooklyn to Queens, New York City, and the subsequent explosives felling of the existing Kosciuszko Bridge. The explosive demolition of the old Kosciuszko Bridge included 10 steel trusses on the Brooklyn approach and 10 steel trusses on the Queens approach. This presentation discusses the methods and procedures that were developed to protect third-party buildings, buried gas transmission pipelines, the Long Island Railroad, the Historical Old Calvary Cemetery and the new K-Bridges. During the explosive demolition on October 1, 2017, SSI used 52 seismographs at adjacent structures to monitor vibrations. The conclusion of the presentation will include a video compilation of Controlled Demolition, Inc. (CDI) successful explosives felling of the 3,104’ long, 20-span, structural steel, iconic Kosciuszko Bridge.

Please refer to our meeting announcement for full details (


AEG: USGS’s Pratt on seismic shaking

Association of Environmental & Engineering Geologists

D.C. – Maryland – Virginia Chapter

Notice of Meeting

Thursday, October 19, 2017

Topic:                      Amplification of earthquake ground motions by Atlantic Coastal Plain sediments: Implications for Central and Eastern U.S. seismic hazards

Presenter:           Thomas Pratt, PhD
Research Geophysicist, U.S. Geological Survey

Damage in Washington, D.C., during the 2011 Mw5.8 Mineral, Va., earthquake was surprisingly high for an epicenter 130 km away, and “Did-You-Feel-It” felt reports suggest that ground motions in the city were amplified by Atlantic Coastal Plain and other unconsolidated deposits. We measure this potential ground amplification relative to bedrock sites in the city using teleseismic and regional earthquake signals recorded on a temporary seismometer array. The resulting spectral ratios show amplification in the 0.7 to 4 Hz frequency range, which overlaps resonant frequencies of buildings in the city as inferred from their heights, suggesting amplification at frequencies to which many buildings are vulnerable to damage. The 2011 earthquake thus emphasizes the importance of local ground motion amplification in stable continental regions, where low attenuation extends shaking levels over wide areas and unconsolidated, shallow deposits on crystalline or igneous bedrock can create strong contrasts in near-surface material properties. Thicker Atlantic Coastal Plain and Mississippi Embayment strata throughout the central and eastern U.S. produce strong fundamental resonance peaks in the 0.2 to 4 Hz frequency range on spectral ratios computed from crustal-scale seismic experiments. These spectral ratios can be converted from frequency to depth, resulting in depth-converted spectral ratios across the array that produce an image of the strata causing the resonances. The data sets thus provide an average velocity function for the sedimentary sequence, the frequencies and amplitudes of the major resonance peaks, and a subsurface image of the major reflectors producing resonance peaks, and show that teleseismic signals can be used to characterize sedimentary strata in the upper km.

Dr. Thomas Pratt is a research geophysicist at the U.S. Geological Survey’s Geologic Hazards Science Center within the Earthquake Hazards program. His research interests are in seismic imaging of fault systems beneath the surface, computer modeling of geologic structures, studying the tectonic settings of active faults, and understanding ground motions during earthquakes. His past research has focused on active faults throughout the continental U.S. and Alaska, as well as Japan and Panama, and ground motion studies in the Pacific Northwest and the eastern U.S. Dr. Pratt was based in Seattle, WA, for twenty years but recently moved to Reston, VA, where the primary focus of his research is earthquake hazards in the Central and Eastern United States. Dr. Pratt serves as Editor-in-Chief of the Bulletin of the Seismological Society of America, which is one of the premier scientific journals for earthquake science. He received his bachelor’s degree in geology at Cornell University in 1980, and his master’s (1982) and doctorate (1986) degrees in geophysics at Virginia Tech.
Meeting Information

Date/Time:                                                       Location:

Thursday, October 19, 2017              Amphora Restaurant

5:00 PM to 7:30 PM                             377 Maple Ave W

Vienna, VA 22180

Cost (dinner and meeting):                        Agenda:

Members                    $40                    5:00-5:30 PM     Social & Check-in

Non-members           $45                         5:30-6:15 PM     Dinner

  Discounts Available:                                           6:15-6:30 PM     Section Announcements &

      Students save $20                                                                     Sponsor Presentation

Retirees save $10                                          6:30-7:30 PM     Presentation followed by Q&A

A special thank you to our meeting sponsor:

Roctest, the leading manufacturer of geotechnical and structural monitoring instrumentation, has been in operation since 1967. In 2006, Roctest acquired Smartec SA, of Switzerland, specializing in the development, production and distribution of structural health monitoring systems using fiber optic technology. FISO Technologies, also in the Roctest family, leads development and manufacturer of fiber optic systems specializing in the aerospace, industrial control, energy and health sectors. Roctest is represented worldwide by an established network of partners in 75 countries.

Roctest products use reliable technologies including vibrating wire and fiber optics. Our products are used in all phases of projects: planning, construction, operation and rehabilitation. Roctest offers custom solutions designed for non-standard requirements and specific needs such as training, installation and maintenance.

Roctest products are found in dams, tunnels, mines, bridges, cliffs, buildings, pipelines, energy plants and LNG. Roctest is the leading manufacturer and distributor of pressuremeters.

Roctest provides topnotch quality service and the highest level of competence and support.

AEG DMV Officers (2017-2019)

Chair:  Drew Thomas, CPG
ECS Mid-Atlantic, LLC
(703) 471-8400

Vice Chair:  Katelyn Foster, PG
GeoStructures, Inc.
(703) 987-4499

Treasurer:  John Garber
ECS Mid-Atlantic, LLC
(571) 237-5865

Secretary:  Cheryl Gannon, CPG
(703) 418-3276

AEG: Titus on The Pentagon & FEMA’s 9/11 Search and Rescue Mission

AEG-DMV Members and Friends,

Please join us for the September AEG-DMV Chapter meeting.

RSVP by Monday, Sept. 25!

Meeting Info:

Thursday, September 28, 2017

5:30-8:00 PM

Cooper’s Hawk Restaurant

19870 Belmont Chase Dr, Ashburn, VA 20147

Topic: The Pentagon – September 11th, 2011, FEMA’s Urban Search and Rescue Mission

Presenter: Leo J. Titus, Jr., P.E.,

President, ECS Mid-Atlantic

Mr. Titus was a civilian member of Fairfax County’s Urban Search and Rescue Team (VA-TF1) for 11 years and was one of the Structural Specialists deployed as part of the search, rescue, and recovery mission on September 11, 2001. Mr. Titus’ presentation will be an overview of the involvement of the FEMA Urban Search and Rescue teams at the Pentagon from September 11th through September 18th, 2001. There will be an emphasis on the damage to structural members and the shoring process used to stabilize the building during the first several days following the attack.

Please reserve a seat by Monday, September 25!

Two options for RSVP:

1) Reply to Cheryl Gannon ( and plan to pay in person (check or cash) at the meeting, or

2) Use the AEG-DMV website to RVSP and pay online via PayPal ( We are working on updating the website, so please ignore the incorrect dates. Contact Katelyn Foster ( if you have questions regarding the PayPal site.

A special thank you to our meeting sponsor:

Connelly and Associates Drilling Services

Geotechnical, Environmental, and Geothermal Drilling

Service Locations:

– 1513 Tilco Dr, Frederick, MD 21704

– 6882 Wellington Rd, Manassas, VA 20109

If you have questions or trouble viewing this email, please reply to Cheryl Gannon (

AEG Environmental and Engineering Geology Symposium

Visit for all of the information regarding the symposium and other AEG-DMV events.

Third Annual Environmental and Engineering Geology Symposium

April 7th and 8th, 2017 at James Madison University, Harrisonburg, Virginia

Convened by the DC-Maryland-Virginia (DMV) Chapter and the JMU Student Chapter of the Association of Environmental and Engineering Geologists (AEG)

The third annual AEG-DMV spring environmental and engineering geology symposium will be held on the campus of JMU in Memorial Hall. The spring symposium was established to provide a forum for the exchange of ideas, allow for students to meet potential employers, and to further the fellowship that exists between geoscientists.  Last year’s symposium was attended by over 50 geo-professionals, academics, and students from five universities. Lasting personal and professional relationships were forged. The Symposium will consist of the traditional poster and oral presentations on Saturday and a half-day field trip is planned on Friday to observe and learn about a cut slope failures on Interstate-64 crossing the Blue Ridge.

Friday, April 7, 2017

12:00 to 5:00 pm– Half-day field trip.  The field trip will involve visiting the nearby Blue Ridge Mountains near where Interstate-64 crosses the mountain where a slope failed in the past and where historical debris flows can be observed in the nearby vicinity.  In addition, a planned stop will also visit an old railroad tunnel that crosses the Blue Ridge and is under the cut slope.  The tunnel is now being converted into a bike trail.  Dr. Scott Eaton and Dr. Yonathan Admassu will discuss the cut slope features and tunnel.  Dr. Steven Whitmeyer, a structural geologist will guide the group to several stops to explain the geology of the Blue Ridge Mountains.  Please note the field trip is limited to the first 30 participants that sign up.

Saturday, April 8, 2017

08:00 to 08:30 – Symposium registration and continental breakfast

08:30 to 12:00 – Oral presentations – Memorial Hall, Room 6110

12:00 to 1:00 – Lunch & Poster presentations   Mineral Museum open for viewing

(Lunch provided by the AEG-DMV and JMU Student Chapter)

1:00 to 3:00 – Oral presentations – Memorial Hall, Room 6110

Symposium attendance is open to anyone with an interest in environmental and engineering geology.  Fees are based on your standing within AEG and as detailed below:

  • Student                        $30
  • Member                      $75
  • Non-member              $90
  • Field Trip                     $45

Since overnight travel is likely for some attendees, AEG-DMV has made arrangements with the following hotels:

Holiday Inn Express                            $91 per night (two Queen beds)

3325 South Main Street                      $129 per night (King bed)

Harrisonburg, Virginia

(540) 433-9999                                   4.1 miles south of Memorial Hall


Hampton Inn                                       $134 per night (two Queen beds)

85 University Boulevard

Harrisonburg, Virginia                         2.8 miles east of Memorial Hall

(540) 432-1111

The Symposium will be held in Room 6110, Memorial Hall, located at 395 South High Street, Harrisonburg, VA 22801.  Parking is available near Memorial Hall, see attached map.

AEG-DMV and the JMU Student Chapter are excited to host this event and look forward to seeing you in Harrisonburg.  To register and pay via Paypal for the symposium, please log onto the AEG-DMV website (   Attendees can also pay by check at time of registration; however, please complete the event sign-up sheet at the bottom of this page, scan it, and return it to the AEG-DMV Spring Geology Symposium e-mail ( for head count purposes.

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General Directions to JMU Memorial Hall

From  I-81, get off at Exit 245 in Harrisonburg onto VA Rt. 253 / Port Republic Road – Maryland Avenue towards the west. After approximately 0.9 mile, turn right onto High Street.  Travel approximately 0.4 mile to the University parking lot on the left.

AEG: Swearingen on Controlled Release Environmental Reactants

AEG Members & Friends,

This is a notice that our first chapter meeting of 2017 will occur on Thursday January 19th  from 6:00 pm to 8:00 pm at the office of ECS Mid-Atlantic LLC at 14026 Thunderbolt Place, in Chantilly, Virginia. The presentation, Controlled Release Environmental Reactants – Green and Sustainable Approach to In-Situ Remediation, will be given by Dr. Lindsay Swearingen, Co-Owner and Managing Partner at Specialty Earth Sciences.

Please use our E-Pay/RSVP system to register for this event.

Visit for all information about our chapter, upcoming events, etc!

We look forward to seeing you all there.

TOPIC: Controlled Release Environmental Reactants – Green and Sustainable Approach to In-Situ Remediation

 PRESENTER: Dr. Lindsay Swearingen – Co-owner and Managing Partner at Specialty Earth Sciences


 DATE: Thursday January 19, 2017

TIME:  6:00 pm to 8:00 p.m.


ECS Mid-Atlantic, LLC

14026 Thunderbolt Place

Suite 100

Chantilly, Virginia 20151


COST (dinner & meeting):

Members:                    $40

Non-members:            $45

Discounts Available:

Students save $20

Retirees save $10


6:00 p.m. to 7:00 p.m.                         Check-In, Social Hour & Dinner

7:00 p.m. to 8:00 p.m.                         Section Business & Presentation


To reserve a seat, please visit our website & E-Pay System at:

AEG: Shana Carroll on Geopier Rammed Aggregate Case Studies

Notice of Meeting

Announcement from the BWH Section of the

Association of Environmental & Engineering Geologists

Date: Wednesday 11/16/2016


Baltimore MD – Washington DC – Harrisburg PA

 TOPIC: Geopier Rammed Aggregate Pier™ Applications & Regional Case Studies

 PRESENTER: Ms. Shana Carroll, P.E., Northeast Preconstruction Manager; GeoStructures, Inc.

Rammed aggregate pier systems are a ground improvement technology that can be used to increase bearing capacity and control settlement of buildings, tanks, Retaining walls and embankments to close tolerances.  Depending on site requirements, RAP systems can be installed using replacement (Geopier GP3®) or displacement (Geopier Impact®) methods. RAP systems are used to reinforce good to poor soils, including soft to stiff clay and silt; loose to dense sand; organic silt and peat; variable, uncontrolled fill; and soils below the ground water table. They can be used as an alternative to deep foundations or over-excavation, and provide cost and time savings on sites where poor soils and/or existing undocumented fill are a concern in terms of bearing capacity and settlement. This presentation reviews fundamental Geopier design and construction techniques and includes regional case studies such. Projects discussed include the National Cancer Institute’s Advanced Technology Research Facility located in Frederick Maryland and underlain by karst geology in the Piedmont Province, the Gaylord National River Ballroom located in National Harbor, MD in the Coastal Plain Province, and the George Mason University Fenwick Library in the Piedmont Province.


 Shana Carroll currently serves as Northeast Preconstruction Manager for GeoStructures, Inc. and was formerly an Engineer with GeoSyntec, Inc. Shana has been involved in the design, estimating, and pre-construction management of specialty geotechnical systems throughout the East Coast since 2001. Shana holds a B.S. & M.S. degree in Civil and Environmental Engineering from Bucknell University and is a registered Professional Engineer in 5 states.  She is the immediate past president of the Baltimore Chapter of American Society of Professional Estimators (ASPE) and on the Program Committee for the National Capital Section Geotechnical Executive Committee of the American Society of Civil Engineers (ASCE). In her spare time, Shana enjoys writing about topics related to young professionals on her blog ( and traveling.


 DATE: Wednesday November 16th, 2016

TIME:  6:00 pm to 8:00 p.m.


Brewer’s Alley

124 N Market Street

Frederick, Maryland

COST (lunch & meeting):

Members:                   $40

Non-members:          $45

Discounts Available:

Students save $20

Retirees save $10


6 p.m. to 6:30 p.m.                            Social & Check-In

6:30 p.m. to 7:00 p.m.                      Dinner

7:00 p.m. to 8:00 p.m.                      Section Business & Presentation


Chair:  William Mikalik,   Applied Environmental, Inc., (703) 648-0822,

Vice Chair: R. Drew Thomas, ECS Mid-Atlantic, LLC, (703) 995-1717,

Treasurer:  Ashley Hogan, GeoCapital Engineering, LLC Inc., (703-926-5438)

Secretary: Katelyn Vieten, ECS Mid-Atlantic, LLC, (703) 471-3835,


To reserve a seat, please visit our website & E-Pay System at:

Or email Katelyn Vieten

by Monday, November 14th, 2016 at

Upcoming Events:

  • Wednesday, December 21, 2016 – Holiday Party (Location TBD)
  • Thursday January 12, 2017 – Jahn’s Lecturer (Location TBD)
  • April 7-9, 2017 – Spring Symposium (James Madison University)

AEG/PGS: Conventional Tunneling at Tyson’s Corner

BWH Section of the Association of Environmental &

Engineering Geologists and the Potomac Geophysical Society

Date: Thursday May 21, 2015


Baltimore MD – Washington DC – Harrisburg PA

The Meeting will be held at the Amphora Restaurant, 377 Maple Ave., Vienna VA, 6:00-8:30pm. Reservations are necessary,  we need a head count for the restaurant, so, if you wish to attend dinner ($40, members; $45, non-members), please inform Bob Fraser by May 15th at 703-624-3965 (takes both voice and cell text messages) or via E-mail at Non-members and guests are welcome but must have a reservation. Let’s make this joint meeting a success: make a reservation!

TOPIC: Conventional Tunneling (SEM) at: Tysons Corner, Virginia

PRESENTER: Vojtech Gall, Ph.D., P.E. Gall Zeidler Consultants, Ashburn, VA

BIO: Dr. Gall is a Principal of Gall Zeidler Consultants, a tunnel engineering and consulting company headquartered in Northern Virginia. He has over twenty-five years of experience in the design, construction, and construction management of tunnels and underground structures. He frequently serves on expert review panels dedicated to the investigation and improvement of tunneling schemes ranging from initial inception stages through final design development at bid document level. His services relate to a wide variety of facilities ranging from hydro-power schemes in remote settings to complex transit structures at shallow overburden in difficult, over-built urban settings. He has led tunneling efforts on large infrastructure project such as Dulles Metrorail in DC, the Caldecott 4-th bore tunnel in San Francisco and the East Side Access project in New York City. He holds M.Sc. and B.Sc. degrees in Civil Engineering from the RWTH University in Aachen, Germany, a M.Sc. in Mineral Engineering from the University of Alabama and a Ph.D. in Civil Engineering from the University of Maryland. He is a registered Professional Engineer in 18 states and has authored over 40 technical publications on the subjects of tunneling.

ABSTRACT: The Metropolitan Washington Airports Authority (MWAA) is constructing the Dulles Corridor Metrorail Project (DCMP), which will extend Washington Metropolitan Area Transit Authority’s (WMATA) rail services from the Metrorail Orange Line in Fairfax County, Virginia to Route 772 near Ashburn in eastern Loudoun County, Virginia. The extension will be known as the Silver Line and once completed will add 23 miles to the existing Washington Metro System. The project was subdivided in two phases. Phase I segment is 12 miles long and involves 5 stations (two at grade and three elevated) and was opened to public in 2014. Phase II will extend the rail by another 11 miles with a station at Dulles International Airport and a terminus station in Ashburn.

Both phases use the design-build (DB) delivery method. Phase I was constructed by Dulles Transit Partners (DTP) a Joint Venture of Bechtel and URS and included twin 1,700 feet long single track, 22 feet diameter conventional tunnels (excavated by the Sequential Excavation Method or SEM) that are situated in the urban setting of Tysons Corner.

The presentation will address design and construction of these soft ground tunnels that emerged as the most feasible alternative to practically all other tunneling methods including open and closed face TBM drives and cut-and-cover techniques. Tunneling was accomplished with shallow overburden of as low as about 7 feet from the tunnel crown. Because of the shallow depth, soft ground conditions, and the need to control settlements, the tunnel design included use of a double row grouted pipe arch canopy as pre-support for the first 300 feet of excavation and a single row pipe arch canopy for the remaining length of tunnels thereafter. A real-time monitoring of the surface when tunneling the first 90 m under International Drive was implemented to assure VDOT of the tunneling performance.