Upstream view of Pleasant View Bridge


Downstream view of Pleasant View Bridge



Case Study

Washington Township

Pleasant View Bridge Reconstruction Project

Washington Township, Westmoreland County

Project Description:

Pleasant View Bridge was originally built in 1927 and is a two lane, two way bridge serving local residential traffic. It carries traffic in a north to south direction over Beaver Run.  The bridge had a wooden deck that was repaired numerous times over the years. 

In 2004, Senate prepared a design that replaced the wooden deck with a new reinforced concrete deck.  In addition, a new steel superstructure was designed making it composite with the concrete deck.  Overall structure length was designed to be 56.3 feet with a measurement of 53.6 feet at the centerlines of the bearings and an inside of abutments measurement of 51.5 feet.  Inside curb to curb measures 18.0 feet.  The Average Daily Traffic is estimated to be less than 100 vehicles, with no trucks. There is no pedestrian sidewalk on the bridge.

 

The structure had a cost of $95,000.00

 

Additional Bridge Features

Safety Features

Bridge railing on the structure consists of standard 42” high parapets.  The guide rail transitions are gradually stiffened at all four corners of the bridge.  The type 2S approach guide rail is of adequate length at all four corners.  The end treatments are boxing glove type at all four corners

Approach Roadway

The near approach roadway is newer asphalt pavement transitioning into gravel. The far approach consists of newer asphalt. The roadway edges transition to gravel shoulders then to grass.  Drainage is natural with slopes at each corner of the bridge. The far approach roadway turns just before the structure.  The near approach turns and ends at a 'tee' intersection.

Deck

The wearing surface consists of ½” of concrete integral with the deck. The deck consists of 8” thick reinforced concrete.

Superstructure

The new superstructure consists of four W27 x 94 weathering steel beams with C15 x 33.9 steel channel diaphragms at 1/4 points. Neoprene Bearing pads are present at all beam ends.

Substructure

The wingwalls and stems consist of stone masonry with new reinforced concrete caps.

Channel

Channel flow is straight upstream and downstream of the bridge.

Rip-Rap has been placed at the base of both of the substructure units.  The streambed is bowl shaped with 4' of water at the deepest spot.  The banks are sloped approximately 45 degrees and are well vegetated.  Water depth and low velocity are due to a beaver dam downstream.
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