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Bollinger Photos Phase 1

Photos of construction work at Bollinger Road Bridge


Photos taken Sept. 26, 2007

 42-inch drain line 

42-inch storm drain line relocation on the west back

The first piece of the relocated west side 42-inch diameter storm drain line. The laying of the pipe starts from the opening into the creek and moved up to the street. As each length of pipe is installed, it is covered up and the trench is excavated behind it and the next piece laid in. This process allows the contractor access for his digging machinery and a path to remove and store the excavated soil. After this picture was taken, the machine flattened out


New culvert

New culvert and cover

The new culvert and wingwalls, also showing the top of the culvert. This will be where the widened portion of Bollinger Road will run. This project is being constructed in tight quarters so equipment and supplies are moved around to wherever they are out of the way, including the new structures. Note the worker in hardhat and day-glo t-shirt. Safety is a prime concern in construction. The worker also has safety glasses and protective-toed boots as standard wear. Some workers who are not around moving equipment are excused from the visibility shirts, but the rest of the protective gear is a must.


42-inch storm drain

24-inch storm drain line

Constructing the new outfall on the east side We are looking down from the outside at the pipe sticking through the new culvert. It hasn’t been connected to the storm drain in the street yet. This area will be filled up and become part of the roadway.

In the neighborhood piece mailed in September 2007 (Update #2) we showed a photo of the pipe which this one replaces.


New culvert looking upstream

New culvert looking upstream

This is the view of the new culvert looking upstream toward Bollinger Road. The concrete walls on each side extending from the culvert to the banks are called “wingwalls,” and provide protection from the creel water for the dirt fill which is being placed next to the new culvert. The widened part of the road, sidewalk and bicycle lanes, will be over that fill.

In front of the culvert is a “scour pool.” The purpose of this concrete-lined pool is to let the water flowing out of the culvert drop down farther. This makes a bigger splash, and the water will have less force and speed coming out of the pool. This will prevent additional erosion downstream. By reconstructing the upstream small culvert we are concerned water will be speeded up. This is one way to help slow it down.


Rehab of culvert

Rehabilitation of the Remaining Culvert

Looking downstream from inside the smaller culvert. The new concrete wall is a reinforced layer to upgrade the structural integrity of the culvert portion that will remain. The westbound lanes of Bollinger Road (before we narrowed the road for construction) ran on top of this part.

The wood walls in the background are the forms for the new downstream culvert. They will be removed soon and the two culverts will look like one.