Marine Terminal Drainage System Project
Client: Port Authority of
New York and New Jersey
Consultant: DMJM Architects and Engineers, Newark, NJ
As part of redevelopment of the Elizabeth Port Authority Marine
Terminal, including rail expansion and relocation, Port Authority
engineers needed to develop an improved drainage system. They
developed a HYDRA model to evaluate the drainage area during a 25-year
storm and to determine the feasibility of a proposed pumping station
to remove water from a street section to be lowered. The entire
modeling project and report was completed in less than 80
hours.
Rehabilitation and Repair Project
Client: City of Beverly Hills, CA
Consultant: 3-Waters Technical Services, Solana Beach,
CA
Project engineers used HYDRA to identify reaches in the collection system
that were hydraulically overloaded. Because of the sensitivity of
community relations issues related to pipeline replacements in the almost
"built-out" condition of the City of Beverly Hills, rehabilitation was
the preferred alternative to pipeline replacement to restore capacity.
HYDRA's ability to individually track infiltration and inflow as separate
components of a hydrograph helped to locate areas where rehabilitation efforts
would result in needing the least amount of replacement piping. It is
possible this aggressive rehabilitation program will eliminate the need for any
pipeline replacements.
Capital Improvement Plan
Client: City of Sacramento, CA
Consultant: Carollo Engineers, Sacramento, CA
The City of Sacramento was experiencing severe surcharging, caused by a
combination of undersized sewer mains and extensive infiltration from tree root
invasion of pipes laid in back yards. As part of a systematic evaluation
of its sanitary sewer, the City of Sacramento developed a HYDRA sewer model of
one of its most problematic basins. Project engineers tested out several
different scenarios, including rehabilitation and bypass pipeline alternative
options. They compared costs and benefits in order to determine the most
cost-effective improvements to perform over the next 3 years.
Naval Base Facility Rehabilitation Plan
Client: National
Naval Medical Center, Bethesda, MD
Consultant: Michael
Baker Jr., Inc., Alexandria, VA
The sewer system at the National Naval Medical Center needed to
accomadate 10
years of growth at the least cost and with the least amount of disruption to
hospital activities. Using a HYDRA sewer model, project engineers were
able to create a plan to eliminate bottlenecks and adequately restore system
capacity using trenchless system rehabilitation.
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Sanitary Sewer Modeling Project
Client: City of Surrey, BC
Consultant: Kerr Wood Leidal, Vancouver, BC
A HYDRA model was developed for the fast-growing city of Surrey, British,
Columbia, to monitor the effect of growth on the operation of the sanitary sewer
system and avoid backups or overflows. Project engineers used parcel data
from the GIS and population data from the census to load the model. Two
different growth scenarios were model, and it was determined that a planned new
sewer would not be needed for another 5 years.
Comprehensive Land Use Planning
Client: City of Nampa, ID
Consultant: J-U-B Engineers, Boise, ID
As part of a periodic review of their land use plan, the City Council of
Nampa, Idaho, developed a HYDRA sewer model to determine how their land use
decisions would impact the sanitary sewer system. Using the sewer model,
policy-makers were able to readily understand the ramifications of their land
use decisions on long-term infrastructure costs. The model showed, for
example, that new development on the east side of the city would have required
large-scale improvements to the trunk system. The City Council instead
opted to put the new land use in another area of the city, preventing costly
infrastructure improvements in the future.
Sanitary Sewer Master Plan and Development Impact Fee Study
Client: New Braunfels Utilities, New Braunfels, TX
Consultants: Camp Dresser & McKee and Rimrock Consultants
As
part of a sanitary sewer master plan for the fast-growing community of New
Braunfels, Texas, project engineers did a capacity analysis using HYDRA to
distinguish between the portion of improvements required to serve existing
residents and those attributed to new developments. As
a related process, an
impact fee study will be used by an advisory committee to make
recommendations to the city council on the fees to be adopted by the utilities
board.
See the article
Infiltration and Inflow Study
Client: City of South Fan Francisco, CA
Consultant: Carollo Engineers, Fresno, CA
As part of an order from the State Regional Water Quality Control Broad,
the city conducted a study to evalutate the hydraulic capacity of the existing sewer collection system and recommended ways to
mitigate the surcharge and overflows caused during rainfall events.
The HYDRA model was used to identify and prioritize bottlenecks, so early modifications would have the greatest effect on reducing overflows.
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