HYDROLOGIC AND HYDRAULIC
FIELD VIEW NOTES
BY: Ron Schreckengost, P.E.
DATE: October 17, 2002
1. LOCATION DATA
SR – Section:
Waterway:
Municipality:
County:
2025 -153
Garrett’s Run
Manor Township
Armstrong
2. DESCRIPTION OF FLOODPLAIN
Upstream Left: Well defined channel with high banks. Banks are heavily vegetated with
brush and trees. Narrow flood plain beyond bank – 30 feet ± (SR 2025).
Upstream Right: Same as Upstream Left except flood plain is 30 feet± wide (ave.) and consists
of a yard, driveway and mobile home.
Downstream Left: Well defined channel. Banks are not as high as upstream banks. Banks are
vegetated similarly to upstream banks. Broad flood plain with two-story house and well
maintained grass yard.
Downstream Right: Same as Downstream Left except a mobile home is in the flood plain as
well as a garage (out building).
3. DESCRIPTION OF CHANNEL
(Alignment, Siltation, Debris, etc.)
Upstream: Straight alignment. No erosion. Streambed consists of cobbles and larger stone as
well as sandy gravel.
Downstream: Same as upstream. Sharp left hand bend in channel approximately 200 feet
downstream from the structure.
4. SCOUR
(At existing substructure units)
No scour. Channel under the structure consists of exposed bedrock – sandstone. Minor
sediment deposition at abutments.
5. EXISTING STRUCTURE DATA
Superstructure Type:
Substructure Type:
Approximate Skew:
Attached Utilities:
Visible High Water Marks:
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Single span, steel through girder
Stone masonry with concrete companion walls at the near right
and far left corners.
54°
None
None. No debris found on girders, floor beams or beam seats.
HYDROLOGIC AND HYDRAULIC
FIELD VIEW NOTES
BY: Ron Schreckengost, P.E.
DATE: October 17, 2002
6. STREAM CHARACTERISTICS
Stream Ph:
8.0
Aquatic Life:
Minnows and water bugs
7. EXISTING OR POTENTIAL PROPERTY DAMAGE
None expected
8. NEAREST UPSTREAM STRUCTURE DATA:
Type:
Single span, steel I-beam with a timber deck
Waterway Opening: Approximately 259 square feet
Sketch and Measurements: Opening Height varies 6’-1” to 7’-9”
9. NEAREST DOWNSTREAM STRUCTURE DATA:
Type:
Single span, prestressed concrete spread box beam with a
concrete deck
Waterway Opening: Approximately 366 square feet
Sketch and Measurements: Opening Height = 9.75’ +/-
10. OTHER COMMENTS: None
11. SUGGESTED PHOTOGRAPHS (Refer to Appendix ‘B’)
1. Looking Stations Ahead At Bridge
2.
3.
4.
Looking Stations Back At Bridge
Looking Upstream From Bridge
Looking At Bridge From Upstream
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5.
6.
7.
8.
Looking Downstream From Bridge
Looking At Bridge From Downstream
Nearest Downstream Structure
Nearest Upstream Structure