1999 Point Loma Sewer Outfall Repairs San Diego, CA
C&W repaired leaks in the Y-section of the sewer outfall. At a depth of 210 ft, divers cut access into the old diffuser legs and sealed
leaks in the gates. Additionally, C&W designed and installed Monel steel manhole cover plates.
Point of contact: City of San Diego Operating & Wastewater Division Mr. Royal Manaka, 619/221-8740
1999 Point Loma Sewer Outfall Inspection San Diego, CA
C&W inspected the sewer outfall for the City of San Diego during repair of a broken section of the outfall.
Point of contact: City of San Diego Operating & Wastewater Division Mr. Royal Manaka, 619/221-8740
January 1995 Tygart Dam Taylor County, West Virginia
C&W crews demolished the existing low-flow valves and cut a 16'x16' access
hole through the 6' thick concrete downstream wall of the valve chamber. A new
support frame was placed and a 58" diameter ring jet valve was installed.
This process was done at two locations on the dam.
Scaffolding on the downstream face of the dam allowed C&W workers to make cuts in the existing concrete around the old outlet valve. Pieces of concrete as heavy as 22,000 lbs. were excavated.
C&W workers discuss the situation. Visible are the steel arch and multiple reinforcing bars which will support newly poured concrete.
The new outlet valve is lowered over the side.
The new outlet valve is secured into its final position.
The valve is function-tested for the first time.
Point of contact: U.S. Army Corps of Engineers Mr. Joseph Elwell, 724/684-7462
March 1994 Wanapum and Priest Rapids Dams Spillway Concrete Repairs Grant County, Washington
C&W refurbished underwater concrete spillway sections damaged by prolonged water cavitation. C&W designed concrete mixes, prepared
affected areas for forming, installed forms, placed 765 cu. yds. of undermined fill concrete, and preplaced 245 cu. yds. of aggregate/self
leveling concrete. Repair evolutions were documented by underwater video.
C&W workers pump concrete from a boom truck.
Another view of the pumping operations.
Barge-mounted lattice crane.
Divers suit up prior to entering the water.
Material and supplies are moved via barge-mounted crane.
Crane prior to loading onto the barge.
A view of the dam showing the numerous radial gates and piers.
A downstream view of a radial gate, piers, and spillway.
Point of contact: Public Utility District No. 2 of Grant County Mr. Dana Jeske, P.E., Civil Hydro Engineer, 509/754-5088
