SERVICES: HYDROLOGY / HYDRAULICS

Preparation Makes the Difference!

Proper drainage investigation is a critical component of any land development project. Whether a project consists of a residential subdivision, commercial complex or an industrial center, unexpected flooding can have a devastating and costly impact to a project during construction and after completion. That is why VTN Consulting provides comprehensive drainage investigation for every project designed. VTN Consulting’s dedicated staff of drainage engineers and technicians have decades of experience in researching potential flooding impacts and design of flood control facilities that work efficiently and fit the needs of each project. When it comes to providing safe and efficient flood control design, VTN Consulting is committed to make the difference.

Click on the links below to review details of services provided by Land Development Drainage Department:

DRAINAGE STUDIES

The comprehensive investigation of existing and future storm water runoff which impacts a proposed project site is a vital step in the Land Development process. VTN Consulting Nevada has extensive experience in preparing drainage studies for residential, commercial, industrial, and Master Planned Community projects. The major components integrated in the drainage studies are:

Hydrologic modeling to quantify the 10-year and 100-year storm water runoff rates.
Develop routing patterns for off-site and on-site storm flows in compliance with state and local drainage regulations.
Design of storm sewer, culverts and drainage channels, using hydraulic
models such as HEC-RAS, WSPG, and FLOWMASTER to safely convey
storm runoff through the proposed development.
Ensure that all proposed structures are sufficiently elevated and flood
protected to avoid potential flooding problems.

Hydrologic and Hydraulic design are key steps in the development process. Our drainage engineers work directly with land development design team members to ensure that all drainage concerns for the project are addressed. The following are examples of recent drainage studies completed by VTN Consulting:

Mountains Edge Rush Channel & Buffalo Berm

Mountains Edge is a ±2800 acre Master Plan Community in the southwest Las Vegas valley. In order to collect and route the estimated 8500 cfs storm runoff generated during the 100-year storm event, the Rush Channel and Buffalo Berm was designed and constructed. The 1 mile long, 150 foot wide Buffalo Berm was constructed using Roller Compacted Concrete (RCC) which reduces the cost over a conventional concrete facility. The Rush Channel facility is a 1 mile long, 40 foot wide concrete channel that serves as the main drainage facility for the Mountains Edge Development.

Mountains Edge Floodway Paseo

The Floodway Paseo within the Mountains Edge Master Plan Community serves both the purpose of a drainage facility along with providing a multi-use trail and park for the community. The channel consisted of turf reinforced matting to stabilize the ground cover and provide erosion protection. The large rock shown at the forefront of the picture above is grouted riprap that reduces the velocity of flows routed from an arch culvert into the channel.

Concordia @ Arroyo Grande Channel System

This concrete channel system is utilized to convey the 2700 cfs that impacts the 50 acre residential subdivision in Henderson, Nevada. The channel was also approved by the Federal Emergency Management Agency (FEMA) and with its completion the existing Special Flood Hazard Zone was removed from the site.

BLM 115 Channel and Culvert

The BLM 115 Channel and Culvert consists of over 4000 feet of open channel and arch culvert that provides flood protection for over 100 acres of residential development. The main facility consists of a 29’x 9 arch culvert that routes the 4000 cfs design flow through the site and into an existing detention basin north of the project boundary. The facility has been conditionally approved by Federal Emergency Management Agency (FEMA) and once completed will allow removal of the Special Flood Hazard Zone within the site boundaries

FLOODPLAIN ANALYSIS

Projects located in Federal Emergency Management Agency (FEMA) designated Special Flood Hazard Zones require a more in-depth analysis and design to ensure that all local and federal requirements for development are satisfied. VTN Consulting has worked with local Flood Control Districts and FEMA on numerous projects within Special Flood Hazard Zones to ensure that all structures are sufficiently protected from flooding. VTN Consulting also has extensive experience in the processes of Conditional Letter of Map Revisions (CLOMR) and Letter of Map Revisions (LOMR) applications which are required to remove a designated Special Flood Hazard Zones from a project site.