Civil Construction

Culvert Rehabilitation

Corrugated Steel Pipe Replacement | (4 Locations) Chilliwack, BC

Summit Earthworks Inc. was selected by the City of Chilliwack via public tender to complete the drainage improvements at four separate locations in Chilliwack, BC.  

(Site 1) 42354 Keith Wilson Rd – Involved removing two existing 1400mm Corrugated Steel Pipe Culverts, which were replaced with three 15-meter 1200mm Concrete Culverts. The inlets and outlet banks were covered with nonwoven geotextiles and armoured with 250-400mm Rip Rap, and the private driveway reinstated.

(Site 2) 5793 Sumas Prairie Road – Lewis Slough – Located on private property, this location required coordination with the landowner to determine an appropriate schedule. At site 2, Summit removed the existing 1650mm Corrugated Steel Pipe Culvert and replaced it with two 10-meter 1350mm Concrete Culverts. The project also included the installation of Sierra Slope Retaining Walls on each side of the culvert, and the inlet and outlets were covered with nonwoven geotextiles and armoured with Class 25kg Rip Rap and driveway reinstated. 

(Site 3) 10505 Bustin Rd – Hope Slough – This rural site located on a residential road in Rosedale required removing one 1200mm Corrugated Steel Pipe Culvert and replaced with One 15-meter 1650mm Concrete Culvert. The culvert was then filled with 300mm of Coho Gravel. The project required two sections of the Sierra Slope Retaining wall on the East end, a 10-meter long section and, and a 7.5-meter long section on the Western end. The inlet and outlet were covered with nonwoven geotextiles and armoured with Class 25kg Rip Rap; the shoulder was widened with 75mm minus imported gravel to install roadside concrete barriers to reinstate the 4.75m wide existing asphalt road.

(Site 4) 44445 Sumas Central Road – Atchelitz Creek – Located on a rural road surrounded by local farms, this project required removing the existing 1000mm Wood Stave Culvert and replacing a 22.5-meter 1050mm Concrete Culvert. This project required protecting existing utilities, including above ground Hydropower pole and guy wires and underground 60 DP gas main. The 1.5H:1V slopes were rebuilt, and the inlet and outlet armoured using nonwoven geotextiles and 450class 25kg Rip Rap.  

General scope, outline and project activities include:

  • Removal of existing Corrugated Steel Pipe and Wood Stave Culverts, completed with disposal per regulatory guidelines.
  • Installation of Concrete Culverts at four local locations.
  • Installation of Sierra Slope Retaining Wall at specified locations.
  • Project completed during DFO approved fish window, and required major bypass plumping at all four locations.



City of Chilliwack