new sioux city school built
on site of existing facility
Multi-year, Multi-stage Project Maximizes Usable Space
Sioux City Community School District, Sioux City, IA
Bryant Elementary School
- Maximize usable space in a tight area with steep terrain (26.5 feet of elevation difference across the site)
- High level of project coordination with entities involved, included school, city, neighbors, architects, engineers, private utility companies and contractors to layout and complete a schedule for a multi-year, multi-stage project with three bid packages within a proposed budget
- Reconstruct surrounding streets during site work
The central core of Sioux City, IA is growing in student population and with an existing building constructed in the late 1800’s, the school district listed Bryant Elementary School as a top priority for replacement. It was determined using a school district demographic study that a school capable of housing 650 K-5 students would be required. In 2012, DGR Engineering assisted with site selection for the proposed school building. After thorough review of over a dozen possible sites, the existing Bryant Elementary School site was chosen. Due to the increased need in building size, the existing 2.48 acre site was expanded to 4.31 acres through acquisition of eight residential single-family dwellings as well as some City right-of-way (street and alley). A multi-year, multi-staged project that included three bid packages was planned.
Following approval of the plan to expand the existing site to the south and east, property acquisitions and relocations commenced. Bid Package 1 (BP1) included building and site demolition, utilities and grading which included over-excavation and re-compaction of soils below proposed building footings and foundation, retaining walls and paving.
Also during this time, Jennings Street, 31st Street and Jones Street, which were similar in age to the existing school, were reconstructed in a partnership agreement with the City of Sioux City. Along with street reconstruction the utilities were replaced. There were existing 30” water mains in Jones and Jennings Street (with different pressure ratings) that were improved by installing internal seals at the joints. These existing 30” water mains were potholed during design phase to establish location and elevation in order for other proposed utilities to cross them without conflict.
A total of approximately 1,675 linear feet of street including four intersections plus 200 linear feet of relocated City alley through the site was replaced. Work on BP1 was completed in fall of 2017.
Bid Package 2 (BP2) was also completed in year 2016 in coordination with BP1 and included two site geothermal well fields totaling 230 wells at approximately 300 feet deep. The geothermal well field will heat and cool the new school and has been the practice with all the new elementary schools in Sioux City since 2007.
Finally, Bid Package 3 (BP3) included the building construction with remaining site work (final grading, sidewalks, fencing, etc.) adjacent to the building.
- Electrical Power
New Water Distribution System
The City’s residents enjoy high quality water that comes to them in a new and reliable distribution system.
Site Development, Utility Improvements
A multi-phase plan for infrastructure projects was developed for the City of Alton.
Health, safety and public welfare were all improved by this project.
DGR engineers helped L&O Power Cooperative improve communications on its electric transmission system using existing transmission lines, fiber and underground fiber line.
Rock Rapids, IA
Treatment Plant & Well Exploration
DGR Engineering worked closely with OCRWS to design a new Water Treatment Plant to target iron and manganese removal from a shallow groundwater source near the site.
Due to concerns with the age and condition of the structures, along with safety clearances to energized equipment and conductors, a project was undertaken to replace the old infrastructure with new underground lines and associated padmount equipment.
Redwood Falls, MN