Specialized Services
Ivanhoe Utility Improvements
Ivanhoe, MN
Excessive inflow and infiltration (I/I) in the gravity sewer collection system was causing hydraulic overloading of the wastewater treatment system in the City of Ivanhoe. Several point repairs were performed to fix some of the known I/I sources. However, the repairs were not reducing I/I enough for the community to consistently meet their discharge permit. The City enlisted Banner’s expertise to perform an I/I investigation, including inventory and analysis of the current collection system pipe material and age, review of televising records, and identification of sump pump and roof drain connections.
The recommended improvements included a combination of traditional open-cut and trenchless construction methods. The project also incorporated water distribution system and storm drainage improvements. The trenchless construction methods were recommended in areas where these systems did not require upgrades and the pavement was in good condition, minimizing street repairs. This allowed the City to focus their efforts on wastewater collection system improvements. The project was completed in the following two phases:
Bid Schedule No. 1: Open-cut pipe replacement for the gravity sewer mains. Replacement of the 4" service lines connecting residences or businesses to the sewer main were integrated into the project. Water distribution system and storm drainage improvements were also incorporated into the improvements.
Bid Schedule No. 2: Trenchless construction using Cured-In-Place Pipe (CIPP) for both sewer main and lateral rehabilitation. This new technology for lining the services was implemented to benefit the residents of Ivanhoe through a generous grant. The project further reduced infiltration of groundwater into the sanitary sewer system.
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Sioux Falls WRF - Secondary Digester Cover Replacement Coatings
Sioux Falls, SD
The City of Sioux Falls replaced the floating cover of the secondary digester with a fixed beam radial cover at the Water Reclamation Facility. Banner provided coating inspection by a NACE Coating Inspection Certified - Level 2 inspector for the coatings applied to the existing concrete walls and the new steel cover. Coating inspection included observation of the surface preparation, observation of application of the coatings, and final inspection (measuring coating thickness and observing holiday test).
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City of Volga Infrastructure GIS
Volga, SD
Banner created digital maps for the City of Volga's staff to stay up to date on the locations, conditions, and inspections for the City's water system. Banner provided custom forms for well monitoring in addition to system inspections. City staff can use these maps to make decisions on future projects and system updates.
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22nd Avenue Corridor Improvements Study
Brookings, South Dakota
The 22nd Avenue corridor is one of the most important arterial routes in Brookings, serving as a main route for commuting and cross-town traffic with access to many of the area’s retail stores. Portions of the corridor need of rehabilitation, and the City of Brookings would like to provide adequate capacity for future traffic demands. The City retained the Banner/HDR team to provide a preliminary design study of the corridor. The study included determining the existing and future traffic capacity of the corridor, developing preliminary design concepts for the corridor, and evaluating potential utility needs and constructibility issues with the preliminary design concepts. The corridor design had to meet design standards for a 5-lane cross-section that also provides for pedestrian and bicycle travel through the corridor. Banner used drone technology to capture updated aerial photography, which helped streamline some aspects of the project to meet critical project deadlines. The aerial shots provided an accurate representation of physical features and were used to draw marked utilities in the corridor. They were also used to help identify property lines and potential right-of-way conflicts. The technology proved to be very beneficial as a major intersection (6th Street and 22nd Avenue) and the adjacent Brookings Health System had significant improvements during the construction season. All plan sheets incorporated the most recent geometric and site improvements to aid in decision-making.
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Game, Fish and Parks SW Division Dam Inspections
Various Locations, Western SD
Over the course of five days, two Banner employees provided dam inspection services to twenty dams of various types and conditions in multiple locations for the South Dakota Game, Fish and Parks (GFP). Some of the dams were earthen dams and others concrete, for large and small recreational lakes alike. Dams were near towns, in state parks, and some in remote locations. A few of the dams were nearly 90 years old. The spillway designs also varied widely, from straight concrete cutoff walls to long grassy channels with three drop structures. The Banner team of two traveled to each location and inspected each individual component including the approach, spillway structure, stilling basin, dam structure, outlet works, toe drains, and erosion protection. The team noted items like wear, erosion, problematic vegetation, and deficiencies in a detailed report on the condition of each dam, which also included recommendations for repair/replacement, cost estimates for repair/replacement, and an up-to-date dam hazard level recommendation.
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