Great Rivers Greenway is soliciting sealed bids for GATEWAY ARCH NATIONAL PARK SITE IMPROVEMENTS in St. Louis, Missouri. The suggested method of submitting bids is electronically. Bids may be submitted electronically via the Bid Express website at bidexpress.com. All electronic bidders must register with Bid Express to obtain a digital ID. Bid Express has indicated it could take up to 5 business days to process the digital ID. GRG will open bids on the date and time indicated above. All documents necessary to submit a bid will be available on the bidexpress.com website including plans, specifications, and bid packages beginning June 16, 2021 at Bid Express.