September 27, 2018
GLEN MILL ROAD PUMPING STATION
Surge Tank Vault Installation Project
Rockville, Maryland
DESIGN & CONSTRUCTION TEAM
General Contractor: CPP Construction
Owner: The City of Rockville – Public Works
Contract Amount: $275,000
Precaster: Oldcastle Infrastructure
Manufacturing Facility: Oldcastle Infrastructure, Fredricksburg, VA
The project consists of the manufacture and installation of a precast concrete vault for the new hyrdo-pneumatic surge tank at the Glen Mill Pump Station. The surge tank is a critical piece of the surge suppression system that protects the City’s 24- inch water transmission main and the Glen Mill Pump Station. The Glen Mill Pump Station has a capacity of 10 MGD and pumps through a 6-mile-long, 24” transmission main that operates at pressures up to 190 psi.
The surge tanks work in concert with air release valves, which protect the City transmission main from damaging pressure surges that may occur during service disruptions such as power outages at the water treatment plant or the pump station.
The surge tank was installed in an underground precast concrete vault at the Glen Mill Pump Station to avoid visual impact on the adjacent residential community.
PRECAST SOLUTION
Oldcastle Infrastructure manufactured the 12’ wide x 25’ long x 11’4” deep precast concrete tank vault at their Fredricksburg, VA precast plant.
The 102 ton structure was designed in three pieces with a 3 way split slab and separate sump pit. The largest piece was the 37 ton base.
Oldcastle Infrastructure, Inc. and CPP Construction installed the liquid containment vault in one afternoon using a 300 ton hydraulic crane.
AWARD OF CONTRACT
February 6, 2012
SCOPE OF WORK
Precast Structure
A. STRUCTURAL ENGINEERING
Detailed engineering:
Drawings: Detailed drawings
B. PRECAST CONCRETE PRODUCT
Size: 12’ wide x 25’ x 11’4” deep tank vault
Concrete: 5,000 psi concrete
Weight: Approximate finished weight: 102 Tons
C. INSTALLATION
(3) Precast concrete components using a 300 ton hydraulic crane
Find out more about Oldcastle Infrastructure Liquid Containment Vaults