Diamondback Drive 12” and 24” Water Mains
Montgomery County, MD
AMT designed and prepared contract documents (plans and specifications) for the construction of approximately 1,590 feet of 24-inch water main and 390 feet of 10 and 12inch water main. The 24-inch main was relocated from within a neighborhood to Diamondback Drive to limit potential future impacts on the community. The design effort included locations of service and utilities, survey, replacement and relocation design, sequences of construction, thrust blocking and joint restraint calculations and sizing, hydrant and valve spacing, detailed County traffic control plans, corrosion design plans and structural design for a 24-inch valve vault unique to the project.
Specific services provided include:
- Initial Design Report
- Topographic surveys and utility designation along alignments
- Record drawing acquisition
- Soil investigations (6 soil borings)
- Pavement investigations
- Test holes (utility locations)
- Relocation and same trench water main replacement design
- Maintenance of traffic design
- Corrosion design
- Permits included sediment and erosion control, tree trimming, County construction within right-of-way, and MDE water sewerage construction
- Cost estimate preparation
- Material take off list preparation
- Contract completion time estimate
- Specifications
During the 100% field walk, the location of the valve vault along Muddy Branch Road was moved. AMT mobilized a survey crew to investigate and obtain additional topographic survey which was supplemented with record information. Plans were quickly revised with updated information and resubmitted to MCDPW&T for permitting.
The 24-inch main was relocated from within a neighborhood to Diamondback Drive to limit potential future impacts on the community.