Our team of professionals at LEI Engineering and Surveying of Oregon provides a full range of innovative and cost-effective solutions for our clients from design and preparation groundwork to ongoing support until the project is successfully completed. We take great pride at LEI Engineering and Surveying of Oregon in our ability to value engineer projects to provide clients with the best and most effective design solutions. Following is a selection of projects LEI has recently completed.
LEI Engineering & Surveying of Oregon completed the surveying and design for a medium sized fish stream crossing on Savage Creek for access to a logging operation. The crossing was located in steep and environmentally sensitive forested terrain in southern Oregon, near Grants Pass. The portion of the savage creek drainage tributary to this crossing was 3.97 square miles and produced a 50-year storm flow of 450 cfs.
A 142" x 91" corrugated pipe arch was selected and designed as the permanent structure for this site, replacing a temporary railroad car bridge that had been used to access the area for logging activities.
LEI followed current Oregon Department of Forestry guidelines for the design of the new structure.
Poor and expansive soils were a major concern at this location. LEI’s Engineering Geologist, Stephen Palmer performed geologic investigation to classify soils and determine prescriptive measures for design and construction. This also included performing soil infiltration testing using a cased falling head test.
LEI developed site design civil engineering plans for road access and site development. Drainage around the green houses was a serious concern due to the expansive soils at the site. Following engineering geologist recommendations, LEI designed a sub-drain around the buildings to drain water from the foundation soils
Stormwater runoff treatment for this site was addressed with a large wet and vegetated detention pond. LEI worked with the project landscape architect to develop a planting plan and design that included an island in the middle of the pond.