Completed a surface fault rupture hazard study fault study for a proposed pipeline compressor station facility south of Salt Lake International Airport and north of the suspected trace of the active Granger Fault. Excavated and logged an exploratory trench (total 185m in length) to expose an unfaulted and undeformed marker bed identified at the pre-Holocene pre-Gilbert "red beds" used to demonstrate the low surface fault hazard at the site.

Conducted a surface fault rupture hazard study fault study for a proposed multi-lot subdivision/apartment complex adjacent to the active East Bench portion of the Wasatch Fault. Performed aerial photography analysis and fault mapping. Excavated and logged 4 exploratory trenches (total 120m in length) to locate the fault and determine rupture history (min. of 2.1m displacement observed). Provided recommendations for building set-backs, grading and footing placement in areas of rubble fill.

Completed a combination fault and geotechnical investigation involving trenching a 59m long, 3.2m deep exploratory trench through Holocene alluvium and debris flow deposits into Pleistocene Lake Bonneville sediments. No active faults were delineated. The trench was logged using standard level-line techniques and a video log was also made to document the stratigraphy. Five test pits were also excavated, logged, and sampled for geotechnical testing.

Conducted a fault investigation for a proposed residential development in a very structurally complex area within the active Wasatch Fault Zone. This project consisted of aerial photography analysis, fault and surficial geologic mapping, and excavating and logging a 77m long, 3m deep exploratory trench to delineate faulting and determine rupture history (nine active faults splays were documented). Provided recommendations for buildable areas to avoid future rupture hazard. Presentation and discussion of seismic techniques and risks to the City Planning Commission.

The site for a proposed chapel was within the Surface Fault Rupture Special Study Area and logs from geotechnical boreholes across the site indicated a significant change in stratigraphy from east to west. Analysis of aerial photographs proved inconclusive because of surficial disturbance from development in the earliest available photos (1938). Because the active East Bench portion of the Wasatch Fault has been mapped about 90m east of the site, an exploratory trench was excavated across the building pad to determine if the discontinuous stratigraphy was the result of past surface fault rupture. The 40m long trench was excavated 12m deep into Pleistocene Lake Bonneville sediments and revealed a silty clay lens interfingering with silty clay and gravel deposits. No evidence of faulting or liquefaction was observed, the contacts appeared to be depositional. No surface fault rupture-related constraints were recommended.

Conducted a surface fault rupture hazards evaluation for a proposed Salt Lake County Fire Station near the mouth of Little Cottonwood Canyon. Determined the location of the active Wasatch Fault in the vicinity of the site and provided recommendations to the structural engineer and architect for seismic design values for this critical structure. An exploratory trench 71.5m in length was excavated across the site to investigate the presence of recent fault activity. Recommendations were provided for earthquake ground shaking acceleration, ground tilting and deformation, surface fault rupture, and other geologic hazards. An earthquake probability analysis was prepared and recommendations for a risk assessment of the structure were provided. o Project manager for a fault study conducted on a steep hillside lot (suspected fault scarp) in a subdivision approved in the mid 1970's before the Natural Hazards Ordinance prohibited placing structures over active faults. A 14.6m long, 5.2m deep trench was excavated into Pleistocene Lake Bonneville deposits. Three faults displacing sediment layers dated at 15,000-16,000 years old were logged. Recommendations were provided for siting the structure to avoid future surface fault rupture.

Conducted a fault hazard analysis for a proposed development located on 40 acres straddling a wide graben located within the active Wasatch Fault Zone. Project goals project were to determine the potential buildable areas in this geologically complex parcel. Prepared a detailed aerial photo-based fault and surficial geology map. Three parallel exploratory trenches were excavated across the site perpendicular to the trend of the faults for a total distance of 733m. A detailed fault map was created based on the fault locations observed in the trenches and air photos. Other geologic hazards were also addressed including: rockfall, debris flow and set-back from steep slopes.

Conducted a fault investigation for a subdivision approved in the mid-1970's based on work performed by another consultant. The previous work was questioned by the County Geologist because no subsurface exploration was performed to accurately locate the faults. A 22m long exploratory trench was excavated through about 2.5m of Holocene fill and alluvium into Pleistocene sediments. No evidence of faulting was observed, however deformation at the east end of the trench (at the base of the suspected 15m high fault scarp) displayed evidence of drag deformation. A slope stability analysis was performed to determine an appropriate building set-back distance from the base of the slope, should the slope fail during a rupture event.

This fault study was prepared for a large addition to an industrial building located about 100m northeast of the Granger Fault in the West Valley Fault Zone. Because of the shallow groundwater (about 1.5m) and the amount of fill on the site it was doubtful that any meaningful information would be gained from exploratory trenching. Given these factors and the distance from the proposed structure to the surficial expression of the scarp in the air photo mapping, successfully lobbied for development of the site without subsurface exploration.