Solicitation: Invitation for Bids (IFB) W9128F21B0022, for Switchyard Drain Tile Replacement Oahe Project SD. 

Project Description: Work requires removal of the exisitng subsurface
drainage system and emplacement of new subsurface drainage system
with perforated and solid PVC pipe, pipe casing under roadways, aggregate
material for pipe bedding, cover aggregate, and supply/installation of new
gate valves. Due to close proximity to various switchyard components, care
must be taken during construction so as to not damage nearby structures,
electrical components, grounding mat, and underground utilities.