ES&S served as the prime consultant to the City of Sedalia on Phase IIIa of the Downtown Streetscape initiative.  This was a continuation of infrastructure reconstruction and aesthetic upgrades along Ohio Street in the historic downtown district.  Services included civil design, and design / construction support services for slightly more than one city block immediately north of Broadway Blvd./US Route 50.  Infrastructure improvements included total street reconstruction with curb and gutter, new sidewalk, storm drainage structure replacement and piping upgrades, coordination of a water main replacement and other utility relocations.

Coordiation was required with MoDOT relative to the improvements made in their ROW adjacent to the signalized intersection of Ohio Street and 50 Highway.  This included sidewalk ramps and clearances that comply with requirements of the Americans with Disabilities Act (ADA).  Aesthetic features included the addition of brick pavers at crosswalks, as edge treatments along sidewalks, and historic lighting fixtures along the revitalized corridor.  The most striking feature of the project is a new “downtown gateway” feature that was designed under a separate contract by the Kansas City-based urban planning/design firm of Ochsner Hare & Hare (OHH).  OHH was part of the ES&S design team for this streetscape project to assist in the close coordination required between the City, MoDOT and the adjacent church, whose building abuts the road’s ROW limits.

Bid and construction phase services included preparation of design and contracting documents, bid-assistance, opinions of probable construction cost, and coordination of contractor inquiries during construction.  Field services included onsite resident observation and materials quality assurance throughout the construction phase of the project.  ES&S provided these same services on Phase II of the Downtown Streetscape initiative, and provided construction-phase support and come civil engineering design revisions on Phase I.

ES&S provided a study to determine the existing condition of Kiwanis Lake, a 3.5-acre recreational lake in the City’s Plunkett Park. Due to a significant watershed-to-lake volume ratio, the impoundment acted as a trap for upstream sediments and associated constituents, with runoff transporting seasonal organics such as leaf litter, yard waste, roadway sediments, etc. The materials accumulated over time, having left the water body hypereutrophic, leading to oxygenation depletion, algal blooms, overgrowth of vegetation, and further aesthetic concerns. The ES&S Team took samples of storm runoff from locations providing inflow and sampled at the outfall to understand the challenges faced by the lake. A report with findings and recommendations for lake rehabilitation and mitigation was prepared for consideration by the City for future planning and funding of improvements.

ES&S provided full site design for a new, two-story headquarters building for the City of Sedalia Police Department.  The 18,700-sf facility provides increased evidence storage space, a training room, an exercise room, men’s and women’s locker rooms, K9 kennels, interview rooms, and unfinished office space that will allow room for future department expansion as the City population grows.

Site planning and design services included topographic & boundary survey, easement displays, geotechnical investigation on part of the site where previous structures had existed, grading plan, enclosed storm drainage design, concrete drive and parking area, and utility connections.  Construction-support services included staking, concrete strength and soil compaction testing, and observation of foundation construction, steel reinforcement, and steel weld and bolt inspection.

ES&S provided services both as a prime consultant to the City of Sedalia, as well as a subconsultant to the prime design firm, GHN|Architects-Engineers.

Angel Lane is a low-volume, two-lane, asphalt roadway that has served as the “back entrance” to Columbia Regional Airport for many years.  Detours from roadway construction on US Route 63, which runs west of the airport property, resulted in increased traffic using Angel Lane to gain access to the airport, and for heavily loaded vehicles associated with the construction activity.  The increased volume over several years contributed to poor pavement conditions.  ES&S was engaged by the City of Ashland to perform a subsurface investigation and make recommendations for pavement rehabilitation or replacement.  Results of the study showed substantial failure of the subgrade material along this 1.25-mile paved road.  For this reason, a mere resurfacing was not recommended, especially since the City owns property along the corridor, with hopes of developing an industrial park in the future.

Funding challenges for a major reconstruction of the pavement caused a search for innovative alternatives.  The City worked in partnership with Boone County to fund this project.  The County had recently reconstructed a roadway in north Columbia using Full Depth Reclamation (FDR).  The FDR construction process mills and recycles the existing pavement and sub-base materials of a roadway.  With the addition of cement, the recycled material is mixed, shaped and compacted to create a more stable material that can then be used as a base for a roadway surface course.  FDR can be a cost-effective means of providing a higher quality pavement for lower-volume roadways than traditional reconstruction or mere resurfacing.

For the Angel Lane project, the use of FDR for the full length of the roadway resulted in a cost-savings of over 35-percent compared to an option with full-depth PCC pavement for approximately one-third of the length.  ES&S facilitated a “Lunch & Learn” for public works officials in the region to observe the FDR process.

ES&S provided consulting and design services for the closure of two lagoons serving a homeowners’ association.  An Engineering Report was developed outlining the closure plans as well as the conceptual design of relief sewers to connect to the BCRSD system.  Final design services included over 3000-LF of 8-inch PVC gravity sewer to relieve the two existing lagoons, two bores under I-70, and coordination of a crossing under a high-pressure petroleum pipeline.  Application to the State Revolving Loan Fund were included as part of the submittal to the client.

Pictured above is one of the two existing lagoons to be relieved (left) and the same property after lagoon closure (right)

ES&S provided engineering study and design for storm drainage improvements (SDI) and roadway upgrades for three adjacent subdivisions (The Crossroads, Rustic Oaks & Southtown Estates) in unincorporated Cole County.  The area upstream has had recent development that has resulted in flooding complaints and increased maintenance to the existing drainage system.  Services included topographic survey to support hydrologic/hydraulic analysis of the approximately 20-acre sub-basin, and geometric improvements to three intersections, to improve sight distance at an apartment complex, and to adjust poor driveway grades along the roadways that were the cause of spot flooding during heavy rain events.  The drainage study, along with neighborhood complaint history, was used to identify several locations where upgrades were required to the existing enclosed system and ditch sections.  ES&S also evaluated the need for and feasibility of constructing an upstream storm water detention facility(ies).

ES&S has provided professional services supporting planning, design and construction of infrastructure projects at Columbia Regional Airport (COU) since providing survey soil boring locations for siting of the new terminal building during initial conceptual planning in 1967.  Since that time, the firm is proud to have participated in planning and design efforts directly for the City of Columbia, and as a subconsultant assisting prime design firms and construction contractors with significant project assignments at the airport, on both the land and air side.  Below is a list of past projects over a span of two decades offering an example of those services:

ES&S served as the prime consultant for this transmission main upgrade to improve service to the fast-growing northeast region of Columbia’s water service area.  The project consisted of over 22,000-LF of 24-inch water main, which was bid as a DIP and PCCP alternative (PCCP was installed).  A major challenge in the project design was the determination of the appropriate pipeline routing, with two open house meetings of interested parties to explain the rationale used to determine alignment decisions, including issues related to a shared corridor with Hominy Branch Interceptor Sewer and a shared use trail that was built as part of the City’s greenway system.  Other features of the design included 420-LF of 18-inch water main, two major roadway bores.  Full construction-support services included material testing and onsite resident engineer providing shop drawing review, maintenance of daily log, observation reports, progress reports, quantity measurements, invoice approval, wage rate interviews, and change order documentation.  The ES&S Team included Black & Veatch – their role was to perform a hydraulic study to confirm adequate supply to the Hillsdale Booster Pump Station and peer review during preparation of various elements of the project plans and specifications.

ES&S provided planning and design services for two roadways that will provide relief to increased traffic congestion in the Peachtree Commercial District and Nifong Boulevard related to a variety of factors, including: increased traffic at Rock Bridge High School, access management measures that reduced the number of left-turn movements in the area, and ongoing development on the Nifong corridor.  Multiple alternatives were evaluated, with a preferred alternative that includes a new road, Aurora Drive, west of Peachtree Drive; two roundabouts and a short roadway, Nova Way, connecting Aurora at the intersection of Peachtree Drive and Peach Court; and a signalized intersection at Aurora and Nifong.

An extension of this project was proposed by Columbia Public Schools (CPS) to relieve congestion of students arriving and departing the Rock Bridge High School campus to the south.  Approximately 1000-LF of roadway extending to the south of the Aurora Drive roundabout provides a connection to the high school’s north parking lot and the Columbia Area Career Center.  The contract was administered by CPS, with ES&S providing coordination between the two projects and owners.

ES&S provided design services and preparation of construction documents for the Broadway Pavement Improvements Project in downtown Columbia.  The project included an asphalt mill and overlay from Providence Road (State Route 163) to Hitt Street (approx. 2500-LF) and sidewalk ramp improvements to comply with Americans with Disabilities Act (ADA) requirements.  Over 30 sidewalk ramps were reconstructed or had structural modifications.  Several others required installation of detectible warning surfaces.  Additional hardscape aesthetic treatments were added at the Ninth Street intersection.  Temporary traffic control plans routed pedestrians around the sidewalk ramps during construction.  Asphalt milling and resurfacing activities took place overnight to reduce vehicle and pedestrian traffic conflicts.  City staff provided pavement marking plan sheets, quantities, and specifications to be included in the contract documents.

chevron-down linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram