A Hydraulics How To
Technologies and techniques for designing highways that cross or encroach
on rivers is the subject of a new National Highway Institute (NHI) course,
"River Engineering for Highway Encroachments" (No. 135010).
The 3-day course teaches participants how to:
- Apply open channel flow equations and concepts to the design and
evaluation of highway hydraulic structures.
- Determine resistance to flow and sediment transport at highway
crossings.
- Determine the stability or potential instability of rivers at highway
encroachments and crossings and identify countermeasures for addressing
the potential instability.
- Integrate river mechanics, equations, concepts, and principles
into the design, maintenance, evaluation, and inspection of highways
in a river environment.
- Design riprap (a layer or facing of rock or broken concrete) to
control river bank erosion.
Engineering for highways in a river environment is also covered in
a new Federal Highway Administration (FHWA) reference manual, River
Engineering for Highway Encroachments (Publication No. FHWA-NHI-01-004),
which is used in the NHI course. The manual, which is an update of the
1990 Highways in the River Environment manual, details such topics
as river stabilization and bank protection, bridge scour, data needs,
sediment transport, river morphology, and design considerations. For
more information on the NHI course or the reference manual, contact
Phil Thompson at FHWA, 202-366-4611 (email: philip.thompson@fhwa.dot.gov).
A copy of the manual can be downloaded from http://www.fhwa.dot.gov/engineering/hydraulics/
or obtained from the FHWA Report Center at email: report.center@dot.gov
for a nominal fee. The NHI course will be held December 3-5 in Columbia,
South Carolina. For more information, contact Karen Long at 803-737-1525.
To schedule the course, contact Dr. Peter Lagasse at Ayres Associates,
970-223-5556 (email: lagassep@ayresassocites.com)
or Danielle Mathis-Lee at NHI, 703-235-0528 (email: danielle.mathis-lee@fhwa.dot.gov).
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