Engineering Design Source, Inc.

16141 Swingley Ridge Rd
Chesterfield, MO 63017
Phone: 636.537.5585

Structural Engineering

EDSI structural engineers have provided services for the structural design, evaluation and inspection on a wide variety of projects that include bridges, culverts, retaining walls, waste water treatment facilities and educational facilities. Our engineers experience combined with in-house structural analysis and design software with multiple computer aided drafting programs allows EDSI to work with many agencies in a variety of formats.


Structural Services Include: 

– Bridge Design – Replacement/Rehabilitation

– Culvert Design

– Retaining Wall Studies & Design

– Bridge Condition Reports (BCR)

– Construction Cost Estimates

– Load Rating Analysis

– Building Structural Evaluation

– Construction Inspection Services



structural experience


Bissell & Lemay WWTP Incinerator Scrubber Replacement

Bissell & Lemay WWTP

Location: St. Louis, MO

EDSI served as a subconsultant on this $31.5 million project for the Metropolitan St. Louis Sewer District which includes replacement of the incinerator scrubber equipment at both Metropolitan St. Louis Sewer District’s Bissell Point and Lemay Wastewater Treatment Plants. EDSI assisted Black & Veatch with the pre-design phase, as well as the final design phase. The main design and surveying tasks were Lidar scan surveying, data collection, AutoCAD, Revit and structural building analysis using STAAD Pro software. Included in the final project documents were final contract plans and specifications as well as demolition and procurement plans.


Poplar Street Bridge Approach


Location: St. Louis, MO

EDSI was responsible for the subconsultant portion of plans for repairs to portions of the deck of the eastbound and westbound Poplar Street Bridge approach spans, expansion joint replacement, miscellaneous steel repairs, and miscellaneous substructure repairs. Tasks included CAD drawings for inspection, preliminary design and final design stages of project; perform QA/QC of traffic control plans; complete underdeck survey; and complete chain drag test on portions of the deck.




Kingshighway Bridge Study

Kingshighway Bridge Study

Location: St. Louis, MO

EDSI was responsible for the subconsultant portion of a feasibility study to determine the most economically and socially feasible solutions available to replace the Kingshighway Bridge over Union Pacific Railroad located just south of I-44 between Shaw Avenue and Vandeventer Avenue, with a functionally sufficient, aesthetically pleasing design that will provide an adequate level of service and include pedestrian and bicycle accommodations while maintaining sufficient access to the local neighborhoods and businesses. Tasks included utility coordination, environmental report, access & intersection alternatives, detour route and construction staging alternatives, & traffic counts and analysis.


Bridge Over Dulin Creek – MO Route MM 

Location: Jefferson County, Missouri

EDSI conducted the hydraulic analysis for a bridge required for the proposed construction of a road connecting MO Route 30 to Dulin Creek Road, near the existing intersection of MO Route 30/Scottsdale Road in Jefferson County, MO.  Since the three-span bridge was being proposed in a site with no existing structure, hydraulic analysis involved the comparison of a simulation of the natural condition of Dulin Creek versus that of the proposed construction scenario.  Analysis was performed in close coordination with roadway and bridge designers to achieve optimal design.  Hydrology was performed and freeboard requirements were met in compliance with MoDOT Engineering Policy.  Findings were summarized in the form of a MoDOT Bridge Survey Report.  Due to the proposed site being located in a FEMA-designated floodplain, the developed hydraulic model was further used to document findings in order to acquire a floodplain development permit.


Route 16 Over Embarras River

Location: Cole County, IL

EDSI completed a Hydraulic study for a bridge replacement in Cole County, IL. Route 16 is currently carried over the Embarras River by a 290’ five-span bridge. Due to the poor condition of the existing structure, the bridge condition report recommended removing all of the existing structure including piers, abutments, wing walls, and slope walls and reconstructing a new structure.

Hydraulic report included narrative, waterway information table, hydraulic report data sheets, location map, photographs, hydrology, streambed profile, roadway profile, cross section plots, bridge opening plots, natural conditions analysis, existing conditions analysis, proposed conditions analysis, scour analysis, conventional survey notes, and correspondence notes. Narrative included project description, description of existing structure and floodplain, historical observations / records, datum correlation, sensitive flood receptors, hydrologic methodology, hydraulic methodology, summary of natural and existing hydraulic analyses, description of proposed structure, proposed structure analysis, scour analysis, compensatory storage, permit requirements and conclusion. EDSI also completed Hydraulic Surveys on two structures in accord with section 2-600 in the IDOT Drainage Manual. Topographic surveys were also done for the roadway at each structure. This data was used in the preparation of the Hydraulic Report.


Creve Coeur Mill Road Bridge

Location: St. Louis, MO

This project for the St. Louis County Department of Highways and Traffic involved the rehabilitation and resurfacing of the bridge carrying Creve Coeur Mill Road over Fee Fee Creek in the City of Maryland Heights.  Resurfacing of the bridge was to result in a 1” uniform increase in the roadway profile, and existing ends of concrete barriers are to be upgraded with crashworthy end terminals consistent with County standards.  The bridge was to be left open to traffic in both directions during all construction work.

EDSI was responsible for the specification of all required roadway, drainage, erosion control, and maintenance of traffic/staging work.  All work specified by EDSI was in compliance with St. Louis County design policy.  EDSI was further responsible for preparation of roadway plan and profile, roadway details, construction staging plans, and cost estimates of all work specified.