48-Inch Water Transmission Main from BPS #9 to BPS #28

Extending transmission capacity inside an active water system creates immediate risk. Service cannot stop, and design cannot drift from field reality. We aligned system performance with constructable design and carried that alignment through construction, enabling phased delivery without disrupting operations.

Overview

Guernsey provided engineering design for approximately 0.9 miles of 48-inch transmission main connecting Booster Pump Station No. 9 to Booster Pump Station No. 28 in Oklahoma City. The project enables bidirectional flow between the Draper and Hefner service areas, strengthening system flexibility and reliability.

The work included data collection, preliminary engineering, phased design development (35%, 65%, 100%), utility verification, right-of-way coordination, cost estimating, and construction-phase services through as-builts.

System requirements included 150 PSI operating pressure with an additional 100 PSI surge capacity. The design evaluated steel pipe as the base bid and ductile iron pipe as an alternate to align performance with constructability.

The project advanced within an active infrastructure environment, requiring coordination with existing utilities and phased implementation to maintain service continuity.

Approach

We treated constructability as a design requirement.

• Evaluated alignment alternatives against existing infrastructure constraints
• Coordinated utilities early to eliminate field conflicts
• Sequenced construction to maintain continuous system operations
• Produced field-informed documents aligned with real conditions
• Provided targeted construction support to resolve field conditions without breaking design intent

Results

Construction proceeds without disruption to system operations while maintaining continuity between design intent and field execution. This approach holds alignment between system performance and constructability from design through construction.