- Olathe 42-Inch Water Transmission Main
The City of Olathe, Kan., is a rapidly growing community of more than 100,000 people. In response to increasing water demands, the city selected Burns & McDonnell for planning and conceptual design of a 42-inch finished water transmission main from the city’s water plant located within the City of Lenexa to the City of Olathe’s water system. Principal Phase I tasks included a routing study, alternative pipeline materials evaluation and construction considerations.
The need to construct 4 miles of pipeline through Lenexa to reach Olathe’s water system in addition to construction through a portion of Olathe necessitated careful consideration of pipeline routing and involvement by all stakeholders. The initial phase of the routing study utilized geographic information system-based (GIS) mapping to identify potential pipeline routes. Application of preliminary screening criteria yielded two route alternatives for detailed evaluation. The two remaining route alternatives were evaluated utilizing six major weighted criteria and 28 minor weighted sub-criteria. Rigorous evaluation of route alternatives resulted in a final selected route that was acceptable to all stakeholders and an estimated construction cost for the pipeline of less than half the original budgeted cost.
Phase I of the project also included a detailed evaluation of alternative pipeline materials including ductile iron pipe, prestressed concrete pressure pipe and steel pipe. Lining and coating options, installation requirements, field repairs, corrosion potential and protection along with maintenance requirements were considered. Life cycle costs for each pipeline material were also determined over the 100-year design life.
Phase I also included construction considerations for the pipeline including project phasing, construction schedules, and easement determinations.
Burns & McDonnell is working on Phase II of the project, including easement procurement, development of design criteria and preparation of preliminary plans and specifications along with completion of design for two substantial tunnels.
- Route optimization
- Pipe materials evaluation
- Construction sequencing
- Corrosion protection
- GIS mapping
- Present worth analysis
- Public involvement