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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.

Swire Coca Cola Facility Expansion - Bend, Oregon

swire-coca-cola-bendLEI Engineering and Surveying of Oregon completed the land surveying, civil engineering, and construction engineering/surveying for a 20,000 square feet expansion to the Swire Coca Cola Facility in Bend, Oregon.  LEI performed as the land surveying and civil engineering team member for a design-build team lead by Big D Construction out of Salt Lake City, Utah. 
 
Of specific importance for this project and site was stormwater treatment due the sites close proximity to a major drainage canal tributary to the Descuttes River.  The increase in impervious surfaces at the site resulted in an increase in stormwater runoff by over 4 cfs.   To treat this runoff, LEI designed a pair of drywells to treat 100% of the stormwater runoff for the site with the drywells, even up to the 100 year design storm.   Following construction of the new drywells, LEI performed the performance testing for the drywells to verify their ability to treat the increased runoff flows.
 
 

Swire Coca Cola Facility Expansion - Eugene, Oregon

swire-coca-cola-eugene-oregonLEI Engineering and Surveying of Oregon completed the land surveying, civil engineering, and construction engineering/surveying for a 25,000 square feet expansion to the Swire Coca Cola Facility in Eugene, Oregon.  LEI worked at the as the land surveying and civil engineering team member for a design-build team lead by Big D Construction out of Salt Lake City, Utah. 
 
The pre-development site included a smaller distribution facility and parking.  LEI worked with the design build team to develop and site layout for the facility expansion, maximizing good access and utilization of available land while minimizing construction cost.
 
To address stormwater runoff treatment at this industrial location, LEI designed a environmentally friendly vegetated sand filter.  This sand filter captures runoff from the hard surfaces of this site and removes pollutants prior to slowly releasing the runoff into a nearby drainage canal.  
 
LEI also performed construction inspections through the life of the project to ensure construction was proceeding per plan and any issues identified during construction were quickly addressed.

Savage Creek Stream Crossing Design - Grants Pass, Oregon

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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.

Northrop Rural Residential Site Design - Washington County, Oregon

northrop-site-designLEI Engineering and Surveying of Oregon developed a complete site design for this rural homesite on steep terrain in Washington County, Oregon.
 
At the onset of this development project, LEI worked closely with the project architect, geotechnical engineer, and owner to develop a site layout that met the owners desire for the site, while addressing the challenges present at the site.  One of the major challenges of this site were the very bad soils identified by the geotechnical engineer.  To address the bad soils at this site; LEI minimized embankment heights, over excavated unsuitable soils, and prescribed controlled compaction under the direction of the geotechnical engineer.
 
Another challenge at this site was treatment of stormwater.  The steep terrain and poor soils with very low permeability, meant that low cost infiltration systems would not work here.   LEI designed a large, but shallow, detention pond with a staged control structure and a designed flow spreader.   LEI's pond design treats site stormwater and outlets it downslope as sheet flow using the designed flow spreader. 
 

Boat and RV Storage Facility Engineering - Detroit, Oregon

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LEI Engineering and Surveying of Oregon completed the land surveying, civil engineering, and construction engineering/surveying for the construction of a medium sized boat and RV storage facility in Detroit, Oregon.  The site where this development took place included very poor soils, extensive surface water, and a nearby wetland.  
 
This site presented many engineering challenges due to the nearby wetland and extremely poor soils located at the site.  Some of the solutions used to address these challenges included design of a 12-feet height concrete retaining wall along the back of the site, over excavation of poor soils, use of cement-modified soils to provide a firm foundation, extensive use of geotextile and geogrid, and rock armoring of drainage features along the perimeter of the site. 
 
Through the entire construction phase of the project, LEI spent significant time at the site working with the construction contractor to address issues found during construction.  The final constructed site is functioning very well and has meet owner expectations and needs.

Site Design for Green House Development - Oregon City, Oregon

organic-leasing-site-designLEI Engineering and Surveying of Oregon completed the land surveying, geological investigation, and civil engineering for the site development of 250,000 square feet of greenhouses in Oregon City, Oregon.

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.