We make it our priority to deliver the best
solutions to our client's project needs.
We have the ability to complete all phases of an
engineering project from planning and design to
construction management.
Below are example projects.
Stormwater
Planning Projects
Hydrology and Hydraulic
Analysis-Alternatives Evaluation -
Implementation Recommendations
Upper First
Creek Major Drainageway Planning Study
Client: UDFCD, Denver and Aurora
Completion: August 2010
The study updated hydrology for a 40
sq. mi. watershed and evaluated alternatives which
included modeling of 20+ proposed master planned
detention basins. The Conceptual Design
phase then further defined the recommended
improvements.
Murphy
Creek Major Drainageway Planning Study and
FHAD
Client: UDFCD and Aurora
Completion: October 2008
The goal of this study was to
develop a Master Plan to address flooding, stream
stability, and water quality in the Murphy Creak
watershed. The project team sought public
input, gather existing information, conduct field
investigations, and develop and evaluate
alternatives to produce a feasible drainage and
flood control plan. The watershed is rapidly
developing and this study will provide the City
and developers a guide for future
improvements.
Description:
Construction plans were completed for the
improvements to the Rock Creek channel through the
Carolyn Holmberg preserve in Boulder
County. Due to upstream urban
development and the subsequent increase in both
base and peak flows, the channel has experienced
channel bottom and bank erosion. To mitigate
the problem, design plans and details were
prepared for sculpted concrete grade control
structures, low-flow channel and slope
stabilization measures, improved road culvert
crossings, and planting of wetland, riparian and
upland vegetation to restore the Rock Creek
channel.
Cottonwood Creek is tributary to Cherry Creek and
the Cherry Creek Reservoir. The goals achieved in
development of the construction plans included
channel stabilization, 100-year flood conveyance,
prevention of future safety hazards, and safety of
public infrastructure. Some proposed structure
enhancements to restore Cottonwood Creek were
grouted boulder drop structures, stilling basin,
and wetland grasses in between buried rock were
incorporated in order for the structure to visibly
appear more organic and improve water quality
functions.
The flood insurance study included the hydrologic
analysis for four tributaries to the South Platte
River: Four Mile Creek, Horse Creek, West Creek,
and Trout Creek. HEC-HMS was used to model runoff
from the watersheds. HEC-RAS was then used to
determine the 100-year floodplain characteristics.
Digital floodplain data was developed into the
appropriate format so that it could be integrated
into the County's digital flood insurance rate
map.
The flood hazard area delineation was completed
for approximately 2 miles of First Creek and
Tributary T Drainageways. The study goal was
to develop updated floodplain and floodway
boundaries using HEC-RAS model. Updated
flood maps and flood profiles were developed for
the existing condition and with master planned
improvements per the IGA between UDFCD, Denver and
Aurora. Numerous flow splits were identified
throughout the watershed and analyzed using
HEC-RAS.
Tommy Davis Park/Orchard Road
Pedestrian Underpass
Client: UDFCD and Greenwood Village
Completion: November 2009
The primary goals and improvements for Tommy
Davis Park and Orchard Road included enlargement
of the existing pond, improving the water quality
of the pond and trickle channel, and increasing
the capacity of the culvert under Orchard
Road. The resulting reconfiguration of
trails improved pedestrian circulation and
accommodate an underpass under Orchard Road.
Preservation of the flood control storage volume
was accomplished through installation of the flow
control berm, optimizing the pond grading, and
installing the appropriate culvert size under
Orchard Road.
Moser and Associates Engineering completed the
design of a water quality basin to treat the
existing and future development conditions of the
DIA Terminal area to address the MS-4 permit
requirements. The water quality basin will
provide regional water quality for the existing
Terminal and take into account the current South
Terminal Redevelopment Project and future hotel
expansion. The basin was designed to
minimize the amount of maintenance required by
DIA. Construction will begin in October
2011.
Jefferson
County
Fairgrounds Detention Improvements
Client: UDFCD and Jefferson County
Completion: July 2008
The Jefferson County Fairgrounds project included
construction of an approximately 20 acre-foot
off-line detention facility to reduce downstream
peak flows and potential flooding. To divert
drainageway runoff into the facility, the design
and construction plans included a concrete
diversion structure with a concrete wall to
control the diversion weir elevation, concrete box
culvert, and pipe construction. The
project also included an equestrian trail
modification to existing drainage structures,
installation of a grouted sloping boulder drop
structure, and relocation of a sanitary sewer pipe
line.
Little
Dry Creek Culvert Replacement at Arapahoe Road
Client: UDFCD and SEMSWA
Completion: November 2010
Prior to construction the Arapahoe Road culverts
were an 84” corrugated metal pipe (CMP) and a 36”
CMP. The capacities of the existing pipes were not
adequate to fully convey the 100-year storm event
runoff in Little Dry Creek and consequently,
Arapahoe Road was overtopped frequently. The
improvements installed two concrete box culverts
with sizes of 12’x10’ and 12’x8’. The box culverts
pass the 100-year storm event without overtopping
Arapahoe Road. The 12’x8’ box was installed
2 feet higher than the 12’x10’ to accommodate a
pedestrian crossing and also provide connection to
the existing sidewalk along both sides of the
Arapahoe Road.
Engineering Services -
Infrastructure Design - Park Improvements
Wynetka Ponds Park Improvements
Client: South Suburban Parks &
Recreation
Completion: May 2007
Moser & Associates coordinated with the
Architerra Group for design of park improvements
including a formalized trail system, a new parking
lot, dog park water quality feature, improvements
to the existing irrigation pond, parshall flume
along the creek, and other drainage features
throughout the park.
The park provides various amenities including a
synthetic turf athletic field, in-line skating,
picnic locations, along with playground
areas. A Phase III Drainage Report was
prepared along with construction plans that
included grading, drainage, parking lot,
irrigation water line requirements, and a
stormwater management plan.
The ground around an existing 54” metal pipe had
collapsed, causing large sink holes in the
channel. The invert of the pipe had suffered
corrosion and abrasion, damaging the pipe
invert. The water was flowing outside of the
pipe in some locations. The first phase of
the project replaced 290 feet of pipe and a
segment of the invert of the 54” pipe was lined
with concrete as a temporary measure until the
next phase of the project could be funded.
The entire project from conceptual design to end
of construction was completed in four
months. Construction management services
including construction observation and contract
administration were provided.
Concrete Lining
Damaged Invert of 54" diameter Metal Pipe
CDOT Region 1-
Erosion Control Inspections
Client: CDOT - Region 1
Completion: December 2003
CDOT Region 1 construction projects were
inspected for implementation of best management
practices (BMPs) and compliance with the NPDES
Stormwater Permit Regulations. The
installation and effectiveness of both permanent
and temporary BMPs were evaluated and when
necessary, recommendations were made to install
additional erosion control practices and to
improve the performance of existing BMPs.
