Above-grade utilities, i.e. power transformers, air conditioning units, should be located away from primary building entries, important building facades and pedestrian routes.
Above-grade utilities should not occur within primary street corridors.
Utilities should be accessible to maintenance personnel.
At grade vaults should be located within paved surface areas, traffic rated, and set flush with adjacent grades and slopes.
Above-grade utilities should be screened from public view. Equipment shall be screened in compliance with the Land Development Code Chapter 3.36 or applicable local regulations if outside of the City of Corvallis, and OSU Construction Standard 32 35 00 Screening Devices.
Utility conduits and wiring should be underground and routed to provide adequate space for tree lined streets and open space corridors.
All piped utilities (water, storm, and sanitary) serving more than one building shall be designed to be fully accessible for maintenance. These utilities shall not be designed to be located under buildings.
A utility locate of the areas within the proposed construction zone shall occur prior to any mobilization of project.
All underground utilities shall be designed and constructed per local jurisdiction’s “Design Criteria” and “Standard Construction Specifications”, respectively.
Minimum allowable depth of cover for all utilities is 36-inches, unless other design provisions are implemented, and approved by the University approved representative.
Storm water detention and water quality systems shall be based on local jurisdiction criteria, and require approval of the University approved representative.
Volume capacity for detention basins should be calculated based on saturated ground water conditions.
All detention systems should be designed to minimize maintenance, and provide adequate access for cleaning and maintenance activities.
All underground piped utilities shall include a continuous #14 wire installed with the utility line to be used for future locates.
Wires shall extend above grade and shall terminate at a building wall, the top of catch basins or manholes, or similar, visible locations.
Tracer wiring shall be installed with all utility lines, regardless of material or service. Where multiple electrical conduits are installed in a single concrete duct bank, only one tracer wire shall be installed per duct bank.
All projects connecting to existing gravity flow utilities shall include provisions requiring the Contractor to video all new piping outside the building, to one manhole downstream from the new connection.
If the project ties into an existing manhole, or replaces a manhole, then the camera work needs to include the piping to the next manhole downstream.
The video is to be submitted to the OSU Project Manager upon completion.
All franchise utility underground work requires coordination, review, and approval of the University approved representative.
All work shall conform, at a minimum to all jurisdictional codes and regulations. Minimum depth of cover for all utilities is 36-inches, unless otherwise approved by the University approved representative.
Per City of Corvallis Land Development Code requirement (LDC 18.104.22.168.a) for distribution lines, locate all new utilities underground. If existing above ground utilities are within the project limits, then provisions should be implemented by the Designer to have the utilities relocated underground unless otherwise approved by the approved representative.
If the utility is owned by a franchise, with a recorded easement, then the cost of relocation would be the responsibility of the project. If an easement does not exist, then the cost would be the utility’s responsibility, and a new easement would need to be coordinated through the University approved representative. Refer to Construction Standard 22 30 00 for guidance on specific utility elements.
Refer to Construction Standard 01 50 00 Temporary Facilities and Controls for coordinating utilities during construction phase