PROJECT DESCRIPTION
The project consists of the replacement of the Gallagher Run Bridge carrying S.R. 0219, Section A04,
over Gallagher Run in the Borough of Ridgway, Elk County, Pennsylvania. In addition, the project
involves approximately 43 linear feet of channel improvements to stabilize the deteriorating stream banks
located just upstream of the S.R. 0120 Bridge.
The existing structure is a single span cast-in-place slab bridge. The bridge has an 8'-0" normal clear span
and a clear roadway width of 35'-1". There is a cast-in-place safety barrier on the left side of the bridge
and a sidewalk with a precast concrete barrier on the right side. The substructure of the existing bridge is
skewed at approximately 55o to the centerline of S.R. 0219.
The proposed structure will be a single span composite prestressed concrete adjacent plank beam bridge
with a normal clear span of 10'-0", curb-to-curb width varies from 36'-0 5/8" to 36'-7", and out-to-out
width of 48'-5 ½". There is an 8" curb with a varying sidewalk of 4'-8" on the right side with a 3'-6"
pedestrian barrier along each side. The proposed structure will carry a varying 16'-0 5/8" to 16'-7" lane, a
12'-0" lane, and an 8'-0" parking lane. The twelve 48"x12" composite prestressed concrete adjacent plank
beams will carry a 5½" thick reinforced concrete deck, two 8" high concrete sidewalks and 3'-6" high
concrete barriers. The bridge will be located on a vertical curve and a tangent horizontal alignment. The
superstructure will be founded on reinforced concrete abutments on spread footings and will be skewed
52o with respect to the S.R 0219 construction baseline. The proposed bridge will have a larger effective
opening because it has a longer span.
In the project area, Gallagher Run is a perennial stream. The normal stream width is approximately 10
feet and the depth of normal flow varies from a few inches to approximately 0.5 ft. Within the project
area the stream has been channelized. The banks of the stream consist of nearly vertical masonry walls,
which are overgrown and in poor condition in some locations. The majority of the streambed has also
been paved. The floodplain areas consist of the urbanized portion of the Borough of Ridgway.
The nearest upstream structure is a concrete slab bridge that serves as a driveway. This bridge has been
included in the HEC-RAS modeling at section 16.55 and is located approximately 200 ft. upstream of the
S.R. 0219 Bridge. The structure consists of a 15 ft. wide, 0.6 ft. thick, concrete slab. The stream banks in
the area consist of masonry walls and the channel under the bridge is approximately 10 ft. wide. The
bridge has an underclearance of approximately 5 ft. There is a small wooden foot bridge located
approximately 100 ft. downstream of the S.R. 0219 Bridge, however, the nearest substantial downstream
structure is the S.R. 0120 (Depot Street) Bridge. This bridge has been included in the HEC-RAS
modeling at section 11.55 and is located approximately 270 ft. downstream of the S.R. 0219 Bridge. The
structure consists of a 55 ft. wide concrete slab bridge with a slab thickness of 0.9 ft. and a 4.8 ft. high
concrete parapet. The bridge has concrete abutments and the stream channel is paved under the structure.
The structure has a span of 15.6 ft and an underclearance of approximately 4.0 ft.
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