Juniper provides ongoing oversight, procurement and coordination of subsurface explorations and geotechnical engineering services for new and existing electrical substations located in Missouri and Kansas for Evergy Energy.

The services were performed at new and existing substations located throughout Missouri and Kansas

Services Provided:
• Performed an exploration program to log the borings.
• Performed laboratory tests on samples obtained from the borings to evaluate pertinent engineering properties of materials encountered.
• Prepared a subsurface geotechnical report containing a description of the field and laboratory programs, boring location plan, typed boring logs, pressure meter test and field resistivity test results, recommended soil parameters, and geotechnical design considerations.

Tasks and Oversight Included:
• Preparing Health and Safety Plan (Overall General and Site-Specific for each location)
• Site Visit & Report – Conducted an initial site visit to mark boring locations, determine need for vegetation clearing and determine need for street closures. A Site Visit Report was generated and distributed to sub-surface utility, topographic survey, and field exploration teams.
• Procurement and Coordination of subcontractors for topography survey, drilling, laboratory services, and vegetation clearance.
• Sub-Surface Utilities Clearance- Conducted borehole clearance using Electromagnetic (EM) induction profiling and Ground-penetrating radar (GPR) surveys for private and public utilities.
• Field Exploration- Used truck-mounted or track drill rigs may be used to complete the following soil test borings for the geotechnical exploration to a depth of 40 feet.
• Obtained utility locates and procure any required permits from authorities having jurisdiction.
• A boring log shall be provided for each boring location. Soil identification and classification shall be made in accordance with ASTM D2487 and D2488 and include the Unified Soil Classification System group symbol. The elevation of ground water encountered at the time of boring shall be noted on the log. All borings shall be backfilled in accordance with state and local regulations
• Obtained soil samples at 5-foot intervals by the following methods:
- Split-barrel samples (SPT) in cohesionless soils (sands, gravels, and hard glacial till); D1586
- Thin-walled tube (Shelby) samples in cohesive soils (silty clays, sandy clays, and material with adhesive
binder); D1587
- Rock Quality Designation (RQD) samples in rock; D6032
- Obtain calibrated hand penetrometer readings on all cohesive samples in the field. Seal samples to
prevent disturbance and moisture changes and transport to the laboratory for testing.
- If rock is encountered within the 40 feet, a maximum of 10 feet of rock core was performed.
- Perform one field resistivity test per boring.
- Performed pressure meter tests per boring at various depths.
• Split spoon and thin-walled samples were collected from the soil test borings
• Obtained groundwater levels in the test borings at the time of drilling and upon completion of the drilling operations.
• Conducted Field Earth Resistivity Survey – Earth resistivity testing was conducted using a four-terminal resistivity meter at the test locations Testing used the Wenner Configuration of equally spaced current and potential electrodes. The field resistivity test results were provided in tabular format.
• Conducted Laboratory Services – Unconfined compressive strength, moisture content, and in-place unit weight tests were performed on representative portions of selected Shelby tube samples. Moisture content tests were performed on all samples. Atterberg limits tests were performed upon representative samples of typical subsurface conditions encountered across this site.
• Evaluation and Geotechnical Report – A geotechnical engineering report was prepared under the direction of a registered professional engineer based on the findings of the field and laboratory programs. The report will include a boring location plan, computer-generated boring logs, results of the laboratory testing program and a description of the surface and subsurface conditions encountered at the site. Completed report shall include boring logs, pressure meter test data with plotted and corrected curves and laboratory and field test data requested above. MFAD (Moment Foundation Analysis and Design) Soil Inputs were used.
• Conducted Topographic Survey – The work was conducted by a Professional Surveyor licensed to practice in the State of Missouri.
• Vegetation Clearing and Grubbing-Depending on the Site, vegetation clearing and/or grubbing was required to gain access into the proposed or existing Site.
• Prepared Stormwater SWPPP Construction Permits and Floodplain Permits.