lei-subdivision

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.

Woodburn Oregon School District Expansion

woodburn-schools-espansion
 LEI Engineering & Surveying of Oregon is the land surveying team member for a multi-disciplinary team to complete renovation and expansion project for multiple schools for Woodburn School District in Woodburn Oregon. These projects are being completed under the districts Bond program.

 LEI Engineering & Surveying of Oregon worked as an integral part of the Bond oversight team and in concert with the design engineer to collect data for these projects. Specifically,  LEI Engineering & Surveying of Oregon completed several ALTA and topographic surveys for use in design of expansion projects.

In early 2020, LEI Engineering & Surveying of Oregon completed a partition for school district property to better interface school property to adjacent private land owners.

Nestucca River Structural Plate Arch

fairdale-archLEI Engineering & Surveying of Oregon completed the route surveying, hydraulic surveying, hydraulic analysis and design, structural analysis, and roadway design for a 39-foot structural plate arch over the Nestucca River, on the Nestucca River Back Country Byway, west of Yamhill Oregon.  

The existing structure at this crossing was a 10-foot span box culvert that was providing minimal to no fish passage. Due to site constraints, a bridge was not possible at this location.  LEI Engineering & Surveying of Oregon worked with the BLM Hydraulics Resource Specialist to determine the channel width that needed to be spanned by a structural plate arch drainage structure.  During this discussion and analysis, it was determined that not only should the structure span the 35'+ active channel width, but a 9-foot width low water channel should be included along the river thelweg to provide adequate depth for fish passage during low flow conditions.  It was also determined that the channel design through the structure should provide boulders and large woody debris to simulate the natural river channel.  

The developed design incorporated these hydraulic and stream geomorphology components to provide both an economically feasible and environmentally friendly crossing. 

Weyerhaeuser Toledo Tree Farm Fish Passage Design

 weyco-toldeo-pipeDuring the spring and summer of 2018, LEI Engineering & Surveying of Oregon completed the survey and design of 25 stream crossings for the Weyerhaeuser Toledo Tree Farm outside of Siletz, Oregon.  Many of these crossings needed to be designed to meet current Oregon fish passage requirements and regulations.   This included sizing crossings for conveyance of the 50-year design storm and providing fish passage using Stream Bed Simulation.   Many of the design structures were corrugated metal pipe arches to providing crossing width to span the average active channel.  A rock vein was designed at the outlet of the pipe to capture stream bedload to provide natural seeding of the structure barrel to simulate the natural stream bed. 
 
During the Summer of 2018 and 2019, these crossings were constructed, with excellent results.  
 
 
 
 
 
 

Swire Coca Cola Facility Expansion - Bend, Oregon

swire-coke-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 Engineering and Surveying of Oregon 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 Engineering and Surveying of Oregon 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 Engineering and Surveying of Oregon 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 Engineering and Surveying of Oregon 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 Engineering and Surveying of Oregon 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 Engineering and Surveying of Oregon 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 Engineering and Surveying of Oregon 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

savage-creek-culvert

  

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 Engineering & Surveying of Oregon followed current Oregon Department of Forestry guidelines for the design of the new structure.