Twin stormwater culvert rehabilitation in Greenwood Place, Baltimore County MD
Problem
Baltimore County, Maryland, needed to rehabilitate 96 linear feet of twin 72-inch corrugated metal pipes that passed under a county road that accesses an apartment community’s main office, and beneath its swimming pool amenity. Extreme deterioration from prolonged exposure to constant running creek water and advanced deterioration created pipe failure concerns.
Single access point to the community ruled out traditional dig-and-replace as a viable option. Open cut and several potential trenchless methods were also ruled out because an existing playground adjacent to the site presented dangers to children.
Solution
Pleasants Construction, Inc., won the project bid as a cured-in-place-pipe (CIPP) lining job using the Alphaliner 1800H UV-cured liner system.
The creek ravine containing the pipes was located between a roadway and railway track. This required cut-in of a temporary work area for equipment, liner crates, crew access, sandbag weir and accommodate diversion for bypass pumping.
Pleasants pressure wash cleaned and televised the pipes in preparation for the lining process as well as cleared debris and prepped the pipes’ interior surfaces.
The weight of the resin-impregnated liners required a 40-ton crane to lift the liner crates from the truck and position them in the crews’ work area. Crews pulled the Alphaliner into place and introduced air for expansion into the failing host pipe. Using the Reline America REE4000 Curing Unit, the liner was successfully cured in place.
Quality control testing was performed followed by site remediation. Within 48 hours of crews arriving on-site, the pipes were rehabilitated and returned to service.
Result
Possible structural concerns, now and in the future, have been eliminated. Due to the success of the project with such limited disruption to the community, the local municipality has been utilizing UV GRP lining on other problematic stormwater assets and failing outflow lines throughout the county.
Reline America 866.998.0808 | relineamerica.com
