University of Kentucky Center for Applied Energy Research

October 1st, 2015

Location: Lexington, KY
Client/Owner: University of Kentucky
Services: Materials Testing

Overview:
Thelen Associates, Inc. performed construction review services for the University of Kentucky’s Center for Applied Energy Research Building 2 located at Spindletop Research Park. Our services included soil compaction testing, concrete testing and review of drilled shaft installations. The Center for Applied Energy Research Laboratory is a multidisciplinary research center which focuses on energy related industries. The new 36,000 square foot facility houses The Kentucky Biofuels Laboratory, in addition to new labs for process development, prototype manufacturing and applied research on batteries, capacitors, solar energy materials and biofuels.

 

Work performed by Thelen Associates, Inc.

THE_ForProjects

Spirit Energy, Underground Storage Tanks (UST)

February 17th, 2014

Owner/Client: Spirit Energy, LLC
Location: Missouri and Illinois
Services: Environmental, Geophysics, Drilling,

Geotechnology conducted environmental sampling at 69 retail gasoline service stations for Spirit Energy. The work was the result of a nationwide owner of convenience stores/service stations purchasing these sites from Spirit Energy. Fifty-nine of the sites were located in Missouri while 10 were in Illinois. Geotechnology previously provided environmental services at some of the sites through our relationships with Site Oil and Shell. Spirit Energy is a joint business venture between the two firms.

Geotechnology’s scope of services involved completing an established number of borings at each site to assess potential soil and groundwater impacts from underground storage tanks. The drilling was accomplished with a direct-push sampling unit. Temporary monitoring wells were constructed in each of the borings to assess groundwater conditions. The wells were also used to assess the groundwater flow direction at each site.

Prior to drilling, Geotechnology developed a site specific Health and Safety Plan for each site, and contacted the appropriate state one-call system to locate utilities in public right-of-ways. We also utilized our geophysics group to clear private utilities prior to drilling. The geophysicists used Ground Penetrating Radar (GPR), Radio Detection (RD 4000) Magnetics and Electromagnetics (EM31) to identify underground utilities.

Underground Storage Tank (UST) Geophysical Survey

February 17th, 2014

Client: Hospitality Builders of America
Location: Memphis, Tennessee
Services: Environmental, Geophysics

Geotechnology conducted geophysical surveying at the subject property consisting of a 1.21-acre asphalt-covered parking lot located at 235 Union Avenue in Memphis, Tennessee. In the northern portion of the subject site (approximately 120 foot by 200 foot area), ground penetrating radar (GPR) was used in an attempt to locate possible
underground storage tanks (USTs) that were associated with a former service station that was located in the northern portion of the subject site (based on the preliminary findings of our Phase I Environmental Site
Assessment).

The remainder of the site will be surveyed using frequency-domain electromagnetics with an EM31. A Scope of Services is attached. The field survey required only one day to complete. Preliminary findings of the geophysical surveying were provided to the client within 5 business days of data acquisition.

After collecting and analyzing the GPR and EM31 data, Geotechnology summarized the geophysical survey results in the Phase I Environmental Site Assessment report that included a description of the geophysical methods, data collection procedures, a contour map of the EM data, representative GPR data, and a site plan showing interpreted locations of USTs based on the geophysical data.

Illinois Department of Transportation (IDOT)

June 18th, 2013

Owner: Illinois Department of Transportation (IDOT)
Client: Various
Location: Various locations throughout Southwestern Illinois
Services: Geotechnical, Geophysics, Drilling, Environmental, Construction Materials Testing, Soils & Materials Testing

Overview:
Geotechnology, Inc. has provided geotechnical engineering, drilling, geophysics, construction observation and materials testing, and environmental engineering services on a significant number of road and bridge projects. Services have included:

  • Drilling, sampling, laboratory testing, and engineering analyses to develop foundation and site design parameters for proposed roadway alignments, new and existing bridge structures, renovation and repair of existing pavements, new asphalt and concrete pavements, and seismic retrofit evaluations of existing bridge structures.
  • Subsurface Utility Engineering Quality Levels D, C, B and A including record searches, site reconnaissance, geophysical surveys, and vacuum excavation (a drilling technique using high pressure air and vacuum to remove soil without harming subsurface structures), all combined with land surveying, and GIS to produce a final map depicting locations of identified utilities.
  • Geophysical surveys and analyses related to proposed roadway alignment geology, structural condition of existing bridge support systems, bridge subsidence investigations and analyses, and investigation of pavement subgrade systems.
  • Materials testing services for new and existing asphalt and concrete pavement, including concrete and asphaltic concrete mix design; Superpave mix design, verification of aggregate quality and compaction testing; slump and air content testing; compressive strength testing of samples; flexural strength testing of beams and structural components; testing of welded and bolted connections; foundation construction observation and testing, including Pile Dynamic Analyses™ (PDA) testing of steel H-piles, Pile Integrity testing of cast-in-place augercast piles, static load tests to determine actual load stresses and/or coordinate PDA test results; cross-hole sonic logging, TV camera inspections, and contract drilling of drilled shafts; and developing temperature models to predict temperature variations on main bridge cast-in-place elements in order to control cracking.
  • Environmental assessments, asbestos surveys, and underground storage tank management related to proposed roadway alignments.

Geotechnology, Inc. has provided these and related services for numerous municipalities, cities and counties, as well as for State agencies and the Federal Highway Administration interstate highway system. This includes projects in the Illinois counties of St. Clair and Madison in the Metro East St. Louis area.

Details:
A sampling of projects performed for IDOT include:

Little Rock Airport Void Detection

June 18th, 2013

Owner: Little Rock National Airport
Client: Grubbs, Hoskyn, Barton and Wyatt, Inc.

Location: Little Rock, Arkansas
Services: Geophysics

Overview: Geotechnology was contracted to help determine the condition of the subgrade beneath a section of distressed taxiway pavement. An ongoing geotechnical evaluation and soil sampling program discovered areas of irregular fill and voids beneath a section of taxiway.

Detail: Geophysical services, such as ground penetrating radar (GPR) data were collected using both 400 and 270 MHz antennae along parallel and perpendicular lines over the taxiway. The grid of 2D GPR lines were combined and processed as 3D data volumes to help resolve potential voids beneath the concrete taxiway. Our geophysicist identified several suspected voids which were verified and grouted during subsequent coring investigations.

Charles B. Wheeler Airport

March 7th, 2013

Owner/Client: Kansas City, Missouri Aviation Department
Location: Kansas City, Missouri
Services: Geophysics

Overview:
Geotechnology conducted geophysical services, including ground penetrating radar (GPR) and multichannel analysis of surface waves (MASW) surveys over a failed portion of a 42-inch corrugated metal pipe beneath a taxiway. The geophysical survey was sparked from video inspections of the pipe, demonstrating that sand and silt migrated into the pipe at the point of failure, creating a concern about voids forming beneath the active taxiway.

Details:
Geotechnology used a GSSI SIR 3000 GPR system with 400 MHz antenna. GPR data were collected along closely spaced parallel lines and processed as a 3D data block. Active mode MASW surveys were conducted using a Seistronix RAS 24 seismograph and 4.5 Hz geophones.  Data were collected over the alignment of the subject sewer and perpendicular to the subject sewer at the suspected location of the failure. Profiles of seismic shear wave velocities were generated based on dispersion analysis of frequency curve picks. The one-dimensional inversion velocity models along the MASW line were combined and contoured to produce velocity profiles. A high amplitude, bowl-shaped GPR anomaly (suspected void) was observed immediately beneath the concrete over the expected pipe failure.  This anomaly was observed in multiple depth slices of the 3D GPR data. The purpose of the MASW data was to extend the depth of the geophysical investigation beyond the limits of the GPR survey. Our MASW interpretation focused between depths of approximately 10 feet and 50 feet beneath the pavement surface. The MASW data indicated power velocity material in the vicinity of the suspected sewer failure, which may indicate the presence of voids or less consolidated soils.

MSD Combined Sewer Overflow Remediation

December 27th, 2012

Owner: Metropolitan St. Louis Sewer District
Client: Jacobs
Location: St. Louis, Missouri
Services: Geophysics, Geotechnical, DrillingSoils and Materials Laboratory Testing

Overview:
Metropolitan Sewer District (MSD) has begun its $4.7 billion, 23‐year, wastewater/stormwater system overhaul to remediate the combined sewer system originally built before the Civil War and the first system to be built west of the Mississippi River. Obviously the needs and laws have changed in the last 150 years and the system needs to be improved to be compliant with USEPA and MDNR standards. These improvements will include technology updates, new sewer separators, and construction of new conveyance and storage tunnels.

Details:
The Lemay Redundant Force Main (RFM) is the initial phase of the overall combined sewer overflow (CSO) remediation. The Lemay RFM project is a second force main from the Lemay Pump Station #1 to the Lemay Waste Water Treatment Plant (WWTP) and will provide additional conveyance capacity. The RFM alignment roughly parallels the existing force main and is located slightly deeper in profile. The RFM is planned as a nominal 10‐foot diameter tunnel, 3,262 feet long through bedrock. Geotechnology is providing geotechnical, field and laboratory testing, and geophysical surveys for the RFM, and prepared a geotechnical data report that provided critical information for the geotechnical aspects of design and construction of the RFM.

The Jefferson Barracks (JB) Tunnel will be approximately 3.5 miles long, approximately 10-foot excavated diameter tunnel in rock.  The tunnel will be used to convey and store sanitary sewage and storm water pending its treatment at the Lemay WWTP near the confluence of the River Des Peres and Mississippi River in St. Louis, Missouri.  The JB Tunnel alignment generally parallels the Mississippi River from Koch Road just south of I-255 and terminates at the Lemay WWTP.  The JB Tunnel alignment generally traverses through the grounds of St. Louis Veterans Administration Medical Center, Jefferson Barracks National Cemetery, a county park, a high school, and a number of private properties.  The current alignment crosses I-255 near the south end of the alignment.  Based on preliminary data the invert of the JB Tunnel is planned to slope 18 feet from the south to the north.  A pump station will be constructed at the downstream (north) end to lift the combined sewage into the Lemay WWTP.

The River Des Peres (RDP) Tunnel, some 8.7 miles long, approximately 30-foot excavated diameter tunnel in rock, and running essentially below the existing River Des Peres channel at a depth of 220 feet is the largest element of the project.  The RDP Tunnel will be used to store and convey sanitary sewage and storm water pending its treatment at the Lemay WWTP near the confluence of the River Des Peres and Mississippi River in St. Louis, Missouri. The considered alignment crosses under railroad tracks at two locations, a rail switching yard, Interstate Highways I-44 and I-55, and the River Des Peres channel at several locations. Based on preliminary data the invert of the RDP Tunnel is planned to slope about 45 feet from the north to the south end.  A pump station will be constructed at the downstream (south) end to lift the combined sewage into the Lemay WWTP.

Hedge Lane Pumping Station

December 27th, 2012

Owner: Water District No. 1 of Johnson County
Client: Black & Veatch Corporation
Location: Olathe, Kansas
Services: Geotechnical, Geophysical

Overview:
A seismic refraction survey was performed as part of a geotechnical site suitability study for a proposed pump station and reservoir located in Johnson County, Kansas. Approximately 3,680 feet of seismic refraction data were acquired, processed and interpreted. Top of bedrock was imaged and rock velocities were calculated for rippability, which was of particular interest at the proposed foundation depths for the new pumping station. The survey was performed across a busy road with minimal disturbance to traffic flow. A Propelled Energy Generator (PEG) was used for greater source strength and to improve the signal-to-noise ratio. Seismic data were processed using Rayfract refraction tomography software (Intelligent Resources, Inc.) and were correlated with borings drilled by Geotechnology during the study.

Safe & Sound Bridge Program

December 27th, 2012

Owner: Missouri Department of Transportation (MoDOT)
Client: Design/Build Team KTU Constructors
Location: Northwest Missouri
Services: Geophysics, Drilling

Overview:
Geotechnology was contracted by the Design/Build Team to provide Subsurface Utility Engineering (SUE) Quality Level B, drilling and lab testing services in support of construction of 479 of State’s 554 bridges in the Safe and Sound program. SUE services included utility drawings and supporting field notes for 226 bridges within 20 counties due 70 days from Notice to Proceed.

Details:
The team designed and executed a precise and thorough protocol to rapidly accomplish site research, SUE Quality Level B geophysical surveying, land surveying, and plan preparation for each of the remote and widely scattered bridge locations during inclement winter weather.

Prior to performing SUE work at each of the 226 sites, a Missouri One-Call was initiated by the team at headquarters. Known utilities were then marked by One-Call personnel to be later verified by our personnel. Despite challenges with One-Call, our crews were able to survey four or more bridges on most days both swiftly and accurately, which exceeded the scheduled two per day. Field work was completed in 12 days.

To accomplish the SUE surveying, Geotechnology organized six, two-person, SUE survey crews headed by a senior geophysicist who supervised the field activities to ensure consistency and quality control amongst all the crews and to assist with large and complex bridge sites. The crews developed efficient methods of locating bridge sites using hand-held GPS units (for which each bridge location was pre-programmed) and identifying the locations of known and unknown utilities using an RD-400/4000 radio detection meter and an EM31 terrain conductivity meter. Each crew prepared site sketches that depicted the relative locations of each identified underground or aboveground utility.

Each geophysics crew was followed by a survey crew from one of three survey companies contracted to Geotechnology for this effort. Each of Geotechnology’s crews were responsible for coordinating with their corresponding survey crew and providing them with copies of their site sketches. The surveyors prepared the final utility drawings for our review and ultimately for our submission to MoDOT. The Geotechnology Team was requested to perform the same services for a second phase of an additional 80+bridges throughout the state the following year.

Results:

  • 226 Bridges
  • 20 Counties
  • 6 SUE Geophysical crews 2012 – 2013 Website Updates Page 4 of 11
  • 226 Utility maps developed
  • 24% Under budget
  • Completed ahead of schedule
  • 115 Utility companies contacted
  • 3 Survey companies

The fast-track drilling portion of this program began in late September 2009 and concluded at the end of March 2010. At any given time eight drill rig crews, three laboratories and a number of support staff were engaged to meet this aggressive schedule. A number of the drill crews utilized PLog to electronically log the information acquired during drilling directly into drilling log software to shorten the time needed to produce the final boring logs.

Winner of the 2008 ACEC Missouri Grand Award for engineering excellence.

Missouri Department of Transportation (MoDOT)

December 27th, 2012

Owner: Missouri Department of Transportation (MoDOT)
Client: Various
Location: Various locations throughout Missouri and Illinois
Services: Geophysics, Drilling, Geotechnical, Environmental, Construction Materials Testing, Soils & Materials Testing

Overview:
Geotechnology, Inc. has provided geotechnical engineering, drilling, geophysics, construction observation and materials testing (CMT), and environmental engineering services on a significant number of road and bridge projects. Services have included:

  • Drilling, sampling, laboratory testing, and engineering analyses to develop foundation and site design parameters for proposed roadway alignments, new and existing bridge structures, 2012 – 2013 Website Updates Page 2 of 11 renovation and repair of existing pavements, new asphalt and concrete pavements, and seismic retrofit evaluations of existing bridge structures.
  • Subsurface Utility Engineering Quality Levels D, C, B and A including record searches, site reconnaissance, geophysical surveys, and vacuum excavation a drilling technique using high pressure air and vacuum to remove soil without harming subsurface structures, all combined with land surveying, and GIS to produce a final map depicting locations of identified utilities.
  • Geophysical surveys and analyses related to proposed roadway alignment geology, structural condition of existing bridge support systems, bridge subsidence investigations and analyses, and investigation of pavement subgrade systems.
  • Materials testing services for new and existing asphalt and concrete pavement, including concrete and asphaltic concrete mix design; Superpave mix design, verification of aggregate quality and compaction testing; slump and air content testing; compressive strength testing of samples; flexural strength testing of beams and structural components; testing of welded and bolted connections; foundation construction observation and testing, including Pile Dynamic Analyses™ PDA testing of steel H-piles, Pile Integrity testing of cast-in-place augercast piles, static load tests to determine actual load stresses and/or coordinate PDA test results; cross-hole sonic logging, TV camera inspections, and contract drilling of drilled shafts; and developing temperature models to predict temperature variations on main bridge cast-in-place elements in order to control cracking.
  • Environmental assessments, asbestos surveys, and underground storage tank management related to proposed roadway alignments.

Geotechnology, Inc. has provided these and related services for numerous municipalities, cities and counties, as well as for State agencies and the Federal Highway Administration interstate highway system.

Details:
A sampling of projects performed for MoDOT include: