HLA Engineering and Land Surveying, Inc. - Yakima - E. Viola Avenue Water Main Replacement Project

Yakima - E. Viola Avenue Water Main Replacement Project

The existing 6-inch water main under I-82 was undersized and aging, causing insufficient performance and inadequate fire flows in the vicinity.  This project included jacking/boring 200 feet of 30-inch steel casing under I-82, followed by installation of new 12-inch ductile iron water main within the casing.  Work also included installation of approximately 400 feet of new 12-inch ductile iron water main to upsize the existing 8-inch water main in South 22nd Street, north of East Viola Avenue.  Scheduling was critical to ensure Yakima Regional Wastewater Plant operations were only impacted during non-peak times.  Additionally, work involved careful coordination due to close proximity of large utility pipelines in the immediate area, including two 48-inch sewer mains, one 36-inch sewer main, one 36-inch industrial waste main, one 24-inch irrigation main, and one 24-inch drain pipe.

HLA services included topographic survey, field investigations of large utilities in the vicinity, design plans, specifications, cost estimate, bidding process, construction inspection and administration, and WSDOT permitting.

Sources of Project Funding:

  • City Funds

Total Project Cost: $322,000

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