Owner: City of Longmont
Client: City of Longmont
Completion Date: 1991
Services: Existing Structures, Forensics Engineering

Summary:

The renovation of the 7 million gallon and the 2 million gallon reservoirs at the Price Park project in Longmont Colorado involved the rehabilitation of the concrete basins as well as rehabilitation of the enclosing steel framework.  The desired improvements were two-fold as follows:  1) The reservoirs were leaking due to cracks in the concrete lining slab and 2) The city was having a difficult time maintaining water quality because of roof leakage on the enclosing structures, thus permitting the entry of insects, birds and contaminating debris from the drainage gutters.

On both reservoirs, the concrete basin lining rehabilitation involved the routing out of cracks and expansion joints in the slabs and the filling of these joints with appropriate patching materials.  The 7 million gallon reservoir was also lined with a rubber lining to provide it with a total waterproof membrane.  The 7 million gallon reservoir enclosing structure was totally reconstructed by providing a new standing seam metal roof deck over the existing framing and by replacing the metal walls with a fluted concrete block.  In order for the existing foundation walls to support the new concrete block exterior walls, the grade beams were underpinned with new footings added between the existing spread footings.  New drainage gutters were constructed on this reservoir and they were lined with an EPDM membrane to assure the waterproofing of the channels. 

The project won an outstanding rehabilitation award from the Rocky Mountain Chapter of the American Concrete Institute.