Category Archives: AEG

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

http://www.aegweb.org

SECTION MEETING

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.

ABOUT THE PRESENTER:

 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 (www.outofthecube.net) and traveling.

MEETING INFORMATION:

 DATE: Wednesday November 16th, 2016

TIME:  6:00 pm to 8:00 p.m.

LOCATION:

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

MEETING SCHEDULE:

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

2015-16 AEG-BWH OFFICERS

Chair:  William Mikalik,   Applied Environmental, Inc., (703) 648-0822, wmikalik@appenv.com

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

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

Secretary: Katelyn Vieten, ECS Mid-Atlantic, LLC, (703) 471-3835, kvieten@ECSLimited.com

RESERVATIONS:

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

www.AEG-BWH.org

Or email Katelyn Vieten

by Monday, November 14th, 2016 at  KVieten@ecslimited.com

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

www.aegweb.org

www.potomacgeophysical.com

JOINT SECTION MEETING

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 fraser.robert@comcast.net. 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.

Spring Symposium, AEG-BWH, April 18 (Saturday)

Geologists and friends:

AEG-BWH is sponsoring a Spring Symposium on Saturday April 18, 2015. The Symposium will this year be held at James Madison University in Harrisonburg, VA. The theme of the Symposium is: The many facets of engineering geology

Our goal is to gather together leaders and students in geo-science, geo-engineering, and related disciplines to discuss their experiences with innovative methods (applied or research) being used in today’s projects. Our hope is that, through such gatherings, the AEG community will continue to grow and better serve to protect property and the environment.

We have a full-day program (see below) and offer 5 PDH’s.

My goal is to make the conference a yearly event. I hope to make it an opportunity for those universities with geology departments with an engineering bent to showcase their achievements.

For those students who wish to just attend the symposium, the cost is nominal ($20). Scholarships are available. Students making a presentation will have a scholarship. Others may be supported when recommended by their department professors.

Professional registration is $70. Contact:

Patrick Hastings
Seismic Surveys, Inc.
604 Solarex Court # 105
Frederick, MD 21703
Phone: (301) 663-6630
AEGBWHSecretary

Below is the current program.

Steve
S. J. Stokowski, PG
Chairman, AEG-BWH
Web: www.linkedin.com/in/stevenstokowski/
cell: 508-259-3536

**********************************************

Presentation Schedule:

8:30 am Registration
9:00-9:10 am Welcome & Introductions
9:10-9:35 am Steve Stokowski, TEC Services, “History and Geology of Aggregate Supply to Washington, DC”
9:35-10:00 am April Kelly, James Madison U, “Earthquake Detection in Central Virginia Using a Dual Template and Autocorrelation Method”
10:00 am BREAK
10:15-10:40 am Stephen Lane, VA Highway Res. Council., Application of Petrography to Highways
10:40-11:05 am Aida Farough, VA Tech, “Evolution Of Physical Properties Of Ultramafic Rocks At High Pressures And Variable Temperatures: Implications To Fault Zones”
11:05-11:30 am Jeremy Butcher, James Madison U, “Sediment source for Smith Creek, Shenandoah County, VA”
11:30-12:40 pm Poster Session and LUNCH (sandwiches and soft drinks included)
12:40 pm-1:00 pm Dr. Steve Whitmeyer, James Madison U. “Visualizing the Geology of Virginia Appalachians”.
1:00-1:25 pm Skip Watts, Radford U, “Do You Need More Geo In Your Geotechnical? Lessons Learned From Hydrogeology and Slope Stability”
1:25-1:50 pm, Louie, Timothy, James Madison U, “The Origins Of Late Silurian Cherts In The Sandstone Member Of The Tonoloway Formation In Bath County, VA”
1:50-215 pm Matt Heller, VA DMME, “Surface Exposure Dating of Debris Deposits in the Valley and Ridge Province, Rockingham County, VA”
2:15 pm BREAK
2:15-2:40 pm Elliott Andelman, James Madison U, “Pangea Breakup Revisited: A New Web Interface For Student Inquiry”
2:40-3:05 pm Dave Fenster, Bechtel Power, “Using Multiple Investigative Methods to Reduce Uncertainty in Karst Characterization”
3:05 -4:00 pm Mineral Museum
Poster Session (Noon)
Aida Farough, VA Tech, “An Experimental Study On Evolution Of Fracture Permeability Of Ultramafic Rocks Undergoing Serpentinization At Hydrothermal Conditions”
Kent Weidlich, Dylan Dwyer*, and Skip Watts, Radford U, “Potential Auxiliary Water Sources For Mountain Lake, Giles County, VA”
Dylan Dwyer, David Imberg*, and Skip Watts, Radford U, “Effects Of Terrain Modification On Surface Water Runoff From The Blueberry Cottages Watershed At Mountain Lake, Giles County, VA”
*Poster presenter

Peridotite Xenoliths! AEG-BWH Meeting, Thursday, January 15

Geologists and students:

I want to personally invite you and your colleagues to the January 15, 2015 AEG-BWH meeting featuring Fred Davis of The Smithsonian. He will be speaking on: Peridotite Xenoliths: A Window into the Mantle. The meeting is at Brewer’s Alley in Frederick. Please register immediately via email to Patrick Hastings at AEGBWHSecretary. Below is the full notice.

Steve Stokowski, PG
Chairman, AEG-BWH
508-259-3536

**********************

Notice of Meeting

Announcement from the BWH Section of the
Association of Environmental & Engineering Geologists

Date: Thursday Jan. 15, 2015

(http://www.aegweb.org)
SECTION MEETING
Baltimore MD – Washington DC – Harrisburg PA

TOPIC: Peridotite Xenoliths: A Window into the Mantle

ABSTRACT:
Xenoliths are rocks from the deep crust and upper mantle that are carried to the surface by violent volcanic eruptions. Peridotite xenoliths are a direct source of information about the chemistry and petrology of Earth’s mantle, which cannot be observed directly. The mantle is the largest layer of the Earth and is the source of basaltic lavas. In my research, I analyze the chemical compositions of the minerals olivine, orthopyroxene, clinopyroxene, spinel, and garnet from peridotite xenoliths to investigate how the composition of Earth’s mantle has changed over time due to recycling of crust and sediments from the surface back into the deep earth through subduction. I am particularly interested in using the concentrations of transition metals, such as Mn, Fe, and Zn, to learn about mantle rocks that partially melt to form basaltic magmas. This work connects with information from seismology and high-pressure experiments to give a clearer picture of the present state of Earth’s interior and how it has evolved through time.

PRESENTER:
Dr. Fred Davis, Ph.D. is a postdoctoral fellow in the division of petrology and volcanology at the Smithsonian Institution. Fred is interested in the chemical evolution and dynamics of the solid Earth and terrestrial planets, particularly as expressed by the chemistry of basaltic lavas. He investigates the processes of melt generation and evolution through experimentation at high temperature and pressure in the piston cylinder apparatus and under varying redox conditions in gas-mixing furnaces. He is also interested in investigating the petrology of the upper mantle by examining natural basalts and mantle xenoliths.

2014-15 AEG-BWH OFFICERS

Chair: Steve Stokowski, AEG BWH, (508) 259-3536, Ettringite@aol.com
Vice Chair: William Mikalik, Applied Environmental, Inc.,
703-282-0835, wmikalik@appenv.com
Secretary/Treasurer: Patrick Hastings, Seismic Surveys Inc.,
240-578-1981, AEGBWHSecretary@gmail.com

MEETING INFORMATION:

DATE: Thursday Jan. 15, 2015
TIME: 6:00 p.m. to 8:45 p.m.

LOCATION

Brewers Alley
124 N. Market Street
Frederick, MD 21701 (Downtown)

Here is the Google Map link to Brewers Alley. (or here:
https://maps.google.com/?daddr=124+North+Market+Street,+Frederick,+MD+21701,+USA&pw=0&t=h&z=16
); Parking is either where you can find it on the street, OR, there is a
multistory, municipal parking garage directly behind the restaurant (note
the long rectangular building east of Brewers Alley when you open the Google
Map/Satellite link). The clearance is approximately 6”8”, which is lower
than some vans.

The parking garage entrance is off Church Street, a one-way heading east. If
coming north on 355/N. Market Street (from I-270), cross over Patrick Street
(the divider between N & S street designations), and turn Right on Church,
and left into the garage. If exiting I-70 (from Balto, for ex), go north
on North on S. East Street, cross over canal, turn left on E. Patrick, Right
on Frederick and Right on Church into garage on left.

COST (dinner & mtg):
Bring personal or company check or cash to the meeting and pay treasurer
before presentation.
Members: $35
Non-members: $40
Students: $25

MEETING SCHEDULE:

6:00 to 7:00 pm Social, Networking and Registration
7:00 to 7:45 pm Dinner
7:45 to 8:45 pm Presentation, Questions, Closing Statements

RESERVATIONS:
To reserve a seat, please email Patrick Hastings by Monday, January 12,
2015 at AEGBWHSecretary.

AEG-BWH 2015 Upcoming Meetings/Field Trips
February 19 – Employment Roundtable at George Mason University
March 19 – Presenter TBD
April 18 (Saturday) – AEG-BWH Spring Symposium (NEW! and at James Madison
University)
May 21 – Presenter TBD

AEG BWH Christmas Dinner Party Dec. 18, 2014

Geologists and students:

I want to personally invite you, your spouse, your friend, and your colleagues to the December 18th, 2014 AEG-BWH Christmas dinner party. We will hear a bang-up talk about rockfall protection for our PDH’s, AND get AEG Gear, sparkly rocks, minerals and gems as party favors and during our annual holiday gift drawing. Come in the combined geology and holiday themed sweater that you cannot wear anyplace else! As additional enticement, note that there is a special Couples Discount (only $60 per couple). The meeting is at Brewer’s Alley in Frederick. Please register immediately via email to Patrick Hastings by Monday, December 15, 2014 at AEGBWHSecretary. Below is the full notice.

Steve Stokowski, PG
Chairman, AEG-BWH
508-259-3536

**********************

Notice of Meeting

Announcement from the BWH Section of the
Association of Environmental & Engineering Geologists

Date: Thursday Dec. 18, 2014

(http://www.aegweb.org)
SECTION MEETING
Baltimore MD – Washington DC – Harrisburg PA

TOPIC: Design Guidelines for Rockfall Fences

ABSTRACT:
The design of rockfall protection interventions is part of the rock mechanics science which needs to be addressed from a geologic and engineering approach. The fact to combine the design with an uncertain and unknown space as the rock mass requires a meticulous statistic analysis. The purpose of this paper is to propose a design guideline for rockfall fences, which will take under consideration the uncertainties of the collected data from the project site. A design begins with site investigations to define morphology, geology and geometry of the slope. A good cooperation between geologists and engineers is the base for the successful project. Once the information is obtained, a statistical parametric analysis on trajectories, velocities, bounds height and energies will be carried out. This analysis will allow the designer to adopt the appropriate rockfall solution in accordance with the safety coefficient applied to the uncertainties. The design can be based on the Service Energy Level (SEL) or Maximum Energy Level (MEL), depending on the frequency of events probability, installation and maintenance cost. The adoption of Rockfall Fence Kit designed in accordance with full scale crash tests (ETAG 027) is recommended in order to provide the values of loads and deformations acting through the fence. The location for the installation of the fence needs to take into account also the practicality of the site, in order to create a safe work environment for the installers. Both the design and on-site assistance by the manufacturer is always recommended for achieving the best final results, which is the safety of the people.

PRESENTER:
Ghislain Brunet has been working in the field of erosion control and rock slope stabilization for more than 25 years. He has implemented and organized the sales and the manufacturing of the rockfall mitigation products in the USA for Maccaferri. He has an MBA and a degree in engineering. He is a chairman on the ASTM International Committee for the Geohazard Protection Systems. He has been involved in developing ASTM standards for more than 15 years. He is vice-president and one of the founding members of the Association of Geohazard Professional.

2014-15 AEG-BWH OFFICERS

Chair: Steve Stokowski, AEG BWH, (508) 259-3536, Ettringite@aol.com
Vice Chair: William Mikalik, Applied Environmental, Inc.,
703-282-0835, wmikalik@appenv.com
Secretary/Treasurer: Patrick Hastings, Seismic Surveys Inc.,
240-578-1981, AEGBWHSecretary@gmail.com

MEETING INFORMATION:

DATE: Thursday Dec. 18, 2014
TIME: 6:00 p.m. to 8:45 p.m.

LOCATION

Brewers Alley
124 N. Market Street
Frederick, MD 21701 (Downtown)

Here is the Google Map link to Brewers Alley. (or here:
https://maps.google.com/?daddr=124+North+Market+Street,+Frederick,+MD+21701,+USA&pw=0&t=h&z=16
); Parking is either where you can find it on the street, OR, there is a
multistory, municipal parking garage directly behind the restaurant (note
the long rectangular building east of Brewers Alley when you open the Google
Map/Satellite link). The clearance is approximately 6”8”, which is lower
than some vans.

The parking garage entrance is off Church Street, a one-way heading east. If
coming north on 355/N. Market Street (from I-270), cross over Patrick Street
(the divider between N & S street designations), and turn Right on Church,
and left into the garage. If exiting I-70 (from Balto, for ex), go north
on North on S. East Street, cross over canal, turn left on E. Patrick, Right
on Frederick and Right on Church into garage on left.

COST (dinner & mtg):
Bring personal or company check or cash to the meeting and pay treasurer
before presentation.
Couples $60
Members: $35
Non-members: $40
Students: $25

MEETING SCHEDULE:

6:00 to 7:00 pm Social, Networking and Registration
7:00 to 7:45 pm Dinner
7:45 to 8:45 pm Presentation, Questions, Closing Statements

RESERVATIONS:
To reserve a seat, please email Patrick Hastings by Monday, December 15,
2014 at AEGBWHSecretary.

AEG-BWH 2014-15 Upcoming Meetings/Field Trips
January 15 – Fred Davis, PhD. of the Smithsonian
February 19 – Employment Roundtable
March 19 – Presenter TBD
April 18 (Saturday) – AEG-BWH Spring Symposium (NEW! and at James Madison University)
May 21 – Presenter TBD

AEG-BWH Meeting, Thursday, November 20

Geologists and students:

I want to personally invite you and your colleagues to the November 20,
2014 AEG-BWH meeting featuring Bill Roman of Gannett Fleming. He will be speaking on: Using Digital Photogrammetry for Rock Slope Mapping and Characterization. The meeting is at
Brewer’s Alley in Frederick. Please register immediately via email to Patrick Hastings by Monday, November 17, 2014 at AEGBWHSecretary. Below is the full notice.

Steve Stokowski, PG
Chairman, AEG-BWH
508-259-3536

**********************

Notice of Meeting

Announcement from the BWH Section of the
Association of Environmental & Engineering Geologists

Date: Thursday Nov. 20, 2014

(http://www.aegweb.org)

SECTION MEETING
Baltimore MD – Washington DC – Harrisburg PA

TOPIC: Using Digital Photogrammetry for Rock Slope Mapping and Characterization

ABSTRACT:
New applications of photogrammetry have emerged with the advent of digital cameras, high-speed computers, and software capable of capturing and processing digital images and vast amounts of point cloud data. One such application is the mapping and characterization of rock slopes, which offers several advantages: 1) data can be collected safely from challenging to reach areas; 2) exposure to traffic and rockfalls is reduced; 3) a robust set of measurements can be collected quickly; 4) photogrammetry provides coordinates of each measurement; 5) discontinuities with limited exposure or having shallow dips can be measured by digitizing their trace; and 6) human error in recording the measurements is reduced. Although photogrammetry is useful for quickly and safely mapping rock surfaces and measuring discontinuity orientations, additional field reconnaissance may be necessary to collect other data depending on project requirements. Field reconnaissance is also necessary for validating the image model and mapping areas obscured by occlusion, vegetation, or other features. This presentation will cover the process of using terrestrial digital photogrammetry for rock slope mapping and illustrate how it was applied to the proposed conversion of a diabase quarry to a water supply reservoir in Virginia and highway rockfall mitigation projects in Pennsylvania.
PRESENTER:
Bill Roman works out of the headquarters of Gannett Fleming, Inc., in Camp Hill, Pennsylvania, where he is Chief Geologist in the geotechnical section of the company’s earth sciences and hydraulics practice. He earned a Bachelor’s degree at Beloit College in Beloit, Wisconsin, majoring in Geology and French. During his 31-year career with Gannett Fleming, he has used both majors, having begun his career as a marketing rep in Gannett Fleming’s international department and having worked on a variety of geotechnical projects in the realms of transportation, water supply, and environmental engineering since joining the firm’s geotechnical section in 1988. Bill is a registered Professional Geologist in Wisconsin, Pennsylvania, and Tennessee and a past president of the Harrisburg Area Geological Society.

2014-15 AEG-BWH OFFICERS

Chair: Steve Stokowski, AEG BWH, (508) 259-3536, Ettringite@aol.com
Vice Chair: William Mikalik, Applied Environmental, Inc.,
703-282-0835, wmikalik@appenv.com
Secretary/Treasurer: Patrick Hastings, Seismic Surveys Inc.,
240-578-1981, AEGBWHSecretary@gmail.com

MEETING INFORMATION:

DATE: Thursday Nov. 20, 2014
TIME: 6:00 p.m. to 8:45 p.m.

LOCATION

Brewers Alley
124 N. Market Street
Frederick, MD 21701 (Downtown)

Here is the Google Map link to Brewers Alley. (or here:
https://maps.google.com/?daddr=124+North+Market+Street,+Frederick,+MD+21701,+USA&pw=0&t=h&z=16
); Parking is either where you can find it on the street, OR, there is a
multistory, municipal parking garage directly behind the restaurant (note
the long rectangular building east of Brewers Alley when you open the Google
Map/Satellite link). The clearance is approximately 6”8”, which is lower
than some vans.

The parking garage entrance is off Church Street, a one-way heading east. If
coming north on 355/N. Market Street (from I-270), cross over Patrick Street
(the divider between N & S street designations), and turn Right on Church,
and left into the garage. If exiting I-70 (from Balto, for ex), go north
on North on S. East Street, cross over canal, turn left on E. Patrick, Right
on Frederick and Right on Church into garage on left.

COST (dinner & mtg):
Bring personal or company check or cash to the meeting and pay treasurer
before presentation.
Members: $35
Non-members: $40
Students: $25

MEETING SCHEDULE:

6:00 to 7:00 pm Social, Networking and Registration
7:00 to 7:45 pm Dinner
7:45 to 8:45 pm Presentation, Questions, Closing Statements

RESERVATIONS:
To reserve a seat, please email Patrick Hastings by Monday, November 17,
2014 at AEGBWHSecretary.

AEG-BWH 2014-15 Upcoming Meetings/Field Trips
December 18 – AEG BWH Christmas Party
January 15 – Fred Davis, PhD. of The Smithsonian
February 19 – Employment Roundtable
March 19 – Presenter TBD
April 18 (Saturday) – AEG-BWH Spring Symposium (NEW! and at James Madison
University)
May 21 – Presenter TBD

AEG-BWH Meeting: Multiple Investigative Methods to Reduce Uncertainty in Karst

Meeting Announcement:
BWH Section of the Association of Environmental & Engineering Geologists

RESERVATIONS:
To reserve a seat, please email Kris McCandless up until Noon on Wednesday, February 19, 2014 at aegbwhsecretary

Date: Thursday, February 20, 2014

TOPIC: Using Multiple Investigative Methods to Reduce Uncertainty in Karst Characterization

PRESENTER: David F. Fenster, PG, Principal Geologist, Eng’g Geology Group Supervisor, Geotechnical & Hydraulic Engineering Group, Bechtel Power Corporation
This subject was presented at the AEG Annual Meeting in Seattle and involved three other authors: W. Godwin (lead author), J. Sowers, and R. Cutsinger.

ABSTRACT:
Characterizing sites underlain by carbonate rock for construction purposes can be tricky at best. When the goal is the construction of critical facilities, it is essential to conduct a site investigation that will result in the reduction of uncertainties to an acceptable level. Carbonate bedrock dissolution can form shallow depressions that initiate at the earth’s surface and propagate in a downward direction, and can form integrated conduit systems at depth. This type of terrain, known as karst, is characterized by dissolution features such as open cavities and fissures, sinkholes, and underground drainage. The hazards to structures built over this type of terrain are well documented. However in cases where karst is not clearly expressed at the surface, for example where the rock is mantled by thick soil, uncertainties in site characterization are increased. Careful geologic characterization using multiple investigative techniques is necessary to facilitate adequate design and mitigate hazard.
In this paper we describe engineering geologic investigations for a nuclear power generating facility sited on carbonate rock in the southern Appalachians, in particular the use of multiple methods to reduce the uncertainty with respect to karst/dissolution hazards at the site. These methods include surface geophysics, vertical and angled borings, surface geologic and geomorphic mapping using LiDAR imagery, statistical analysis of voids, laboratory analysis using XRD/XRF, and development of a site geologic model. Even after the completion of a thorough surface-based investigation, it may be necessary to excavate to foundation depths and to map both floors and walls to further reduce uncertainties.

ADDED SURPRISE: Early indications are that we might be joined at this meeting by several students and their Engineering Geology professor from James Madison University at this meeting. This is encouraging as BWH is hoping to help start a Student Chapter of AEG at JMU.

MEETING INFORMATION:
DATE: Thursday, February 20, 2014
TIME: 6:00 p.m. to 8:45 p.m.
LOCATION – NEW!!
Brewers Alley
124 N. Market Street
Frederick, MD 21701 (Downtown)
Here is the Google Map link to Brewers Alley. (or here: https://maps.google.com/?daddr=124+North+Market+Street,+Frederick,+MD+21701,+USA&p
w=0&t=h&z=16); Parking is either where you can find it on the street, OR, there is a multistory, municipal parking garage directly behind the restaurant (note the long rectangular building east of Brewers Alley when you open the Google Map/Satellite link). Parking garage entrance is off Church Street, a one-way heading east. If coming north on 355/N. Market Street (from I-270), cross over Patrick Street (the divider between N & S street designations), and turn Right on Church, and left into the garage. If exiting I-70 (from Balto, for ex), go north on North on S. East Street, cross over canal, turn left on E. Patrick, Right on
Frederick and Right on Church into garage on left.

COST (dinner & mtg):
Bring personal or company check or cash to the meeting and pay treasurer before presentation.
Members: $35
Non-members: $40
Students: $25
Members, if you’d like to sponsor one of the students’ dinners, that offer will gladly be accepted.
Details on this in subsequent email announcements.

MEETING SCHEDULE:
6:00 to 7:00 pm Social, Networking and Registration
7:00 to 7:45 pm Dinner
7:45 to 8:45 pm Presentation, Questions, Closing Statements

RESERVATIONS:
To reserve a seat, please email Kris McCandless up until Noon on Wednesday, February 19, 2014 at aegbwhsecretary

Steve
S. J. Stokowski
Vice-Chair, AEG-BWH
508-259-3536508-259-3536 cell