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Street Reconstruction

September 28, 2018

The reconstruction of Jackson Street was part of the City’s Capital Improvement Plan for several years.  The reconstruction started several years ago at 36th Street with work extending south since then.  Recently the City desired to extend the reconstruction from 18th Street to south of 14th Street.

DGR Engineering was selected as the most qualified firm to provide the design services for this project.  This project included new utilities (sanitary sewer, storm sewer and water main), new sidewalks, paving and traffic signals.  An HMA street option was also presented in the plans which included a granular base and subdrains.  Improvements to W. 14th Street extended one-half block west.

A traffic study was completed by our traffic engineer subconsultant, Snyder and Associates, in the area of W. 14th Street and Jackson Street.  Improvements to the northeast corner radius of W. 14th and Jackson Street was also part of the plan.  The project was completed in three (3) stages with up to two (2) phases in a stage.

Project details including access during construction were discussed with local businesses.  DGR was involved in all aspects of survey, design and letting of the project as well as limited construction administration.

Street Reconstruction

September 28, 2018

This project involved the reconstruction of approximately 8,500 linear feet of residential street including replacement of all utilities located between Hamilton Boulevard and Grandview Park and between W. 23rd Street and the Valley Drive.

The project was phased over a three-year timeline due to the steep topography, curved streets, narrow right of way, and lack of side street and alley access.

The project also included adding sidewalk along one side of the street and colored and stenciled concrete at crosswalks. A stamped and stained emblem chosen by the Heights Association (created as a result of this project), was imprinted into the driveway of each residence along with the year the house was built.

The project was coordinated with private utility companies (MidAmerican, Qwest and Cable One) to relocate private utilities prior to street reconstruction using directional bore in a City obtained permanent utility easement.

All overhead utilities are to be installed underground. In order to involve the residents in the design process and to prepare them for construction, the area was separated into four (4) zones with lead and alternate representatives identified to be involved in the design process. A total of four (4) public meetings were held for the project to discuss the project schedule, design features, construction impacts, etc.

Site Development

September 28, 2018

DGR performed the boundary and topographic surveying as well as the site design of school building addition as a subconsultant of Architecture, Inc.

The school facility addition design included storm sewer upgrades, pedestrian facilities to multiple building levels, enhanced and expanded parking, as well as access road design to facilitate the future campus growth.

The design also included realigning water main and sanitary sewer main beneath the building link to avoid proposed footings as well as a rainfall harvesting system to collect and recycle rainwater from the building roofs.

Commercial Park Development

September 28, 2018

DGR Engineering worked alongside the City of Sioux Center and Sioux Center Land Development to help secure Iowa DOT RISE funding.  Following a topographical survey and preliminary design, DGR performed the boundary survey which included transferring new road right-of-way to the Iowa DOT.

The design and construction included evaluating the current and future growth trends of this portion of the City, such that sanitary sewer and water distribution system could be adequately sized to serve this development and future growth.  The storm sewer design not only included the sizing of storm sewer pipe, intakes and stormwater detention basins, but also addressed an existing, undersized culvert beneath Highway 75.  A phased traffic control plan was necessary to facilitate 2-way traffic on Highway 75 while a new culvert was being installed.  DGR also worked with the businesses who relocated their operation along the highway frontage during the planning, design and construction phases to help the project best fit the end-user needs.

Pavement/Utility Improvements

September 28, 2018

MN DOT, Rural Development, Watershed District, PFA low interest loan, TMDL grant, Lyon County Highway Department

In the fall of 2008, the City selected DGR to reconstruct water mains, sanitary and storm sewer and the highway pavement on Jefferson Street and TH 68.  DGR assisted the City in obtaining funding for approximately 70% of the project costs via grants, state aid and county participation.  The project utilized funding from the above referenced sources, as well as the City.  DGR provided full time construction observation and administration to aid the City and record keeping and testing required by these agencies for reimbursement.