Utilizing Efficient Grading and Drainage Design To Reduce Development Costs

How To Prevent Your New Single Family Home Development From Going Underwater (Literally), With a Proper Grading and Drainage Plan
Grading and drainage SFH #5

Note: this is the fifth post in a multi-part series focused on single-family housing developments. Read more posts in the series:

Part 1: Planning and Feasibility Steps
Part 2: Zoning, Density, and Layout
Part 3: Site Investigation Report
Part 4: Coordination, Design, and Permitting
Part 5: Grading and Drainage Design

With most single-family projects, the chosen sites typically are larger due to economies of scale — not only with materials and grading but also with the planning and engineering services WGI provides.

The grading considerations on a single-family project can make or break the project’s construction budget or margins if the designer does not pay close attention to the site’s soils, drainage, and existing topography. 

Finding The Proper Balance

To maintain the development’s profit margins, it is a design imperative that we balance a site for the movement of earthwork. To do this, our planning team includes senior-level team members that collaborate when we first analyze and layout a site.

drainage for sfh #5

Curbing Water And Costs

The site’s layout not only functions from an upfront planning standpoint but is also initially based on drainage concerns and existing topography, making sure that the storm and flood routing can be handled on the site without undue use of storm sewer structures and piping.

We also look for ways to utilize streets and curbing to convey water as efficiently as possible. Curbing can carry water at a cost typically one-third than that of storm sewer piping, and we work to create a site that maximizes its use.

Storm sewer and drainage

Getting Down In The Dirt

We then analyze the soil types and determine the amount of soil needed to offset its movement and if there is need for the addition of water to ensure proper compaction. If granular material is found on a site, we typically direct a contractor to borrow from them to correct areas that are not of suitable material.

All this is done with our typical engineering design service, creating savings for the developer with an area of added value we can provide a project. For reference, the cost to haul in material versus moving it when already on-site can be up to six times the cost, making it a high priority on our list to minimize bringing in material unless absolutely needed.

Cut/Fill Map Example

A Great Engineer Can Help You Reduce Costs

Grading and storm sewer are both major costs associated with a development and one of the only areas that an engineer can reduce their overall cost by utilizing good design techniques. All developments require streets, sanitary sewer, and water main to service single-family lots. Paying close attention to grading and drainage is imperative to maintain the lowest cost for our clients.

Let’s Get Started

Are you interested in reducing costs on your new development? Need assistance determining the best layout for your site? Reach out to us today and lets talk about how we can utilize our design talents and expertise to keep more money in your pocket!

Share this post

Share on facebook
Share on twitter
Share on linkedin
Share on email

Share this post

Share on facebook
Share on twitter
Share on linkedin
Share on email

Learn more
about our
services

Related

Stormwater Permit
Blog

What is a SWPPP?

Nearly all construction site operators engaged in clearing, grading, excavation activities that disturb one acre or more, including smaller sites in a larger common plan of development or sale, are required to prepare a SWPPP. WGI can help.

Awesome Associates

Awesome Associates: Megan Amitrano (San Antonio, TX)

Meet our Awesome Associate Megan Amitrano, a Civil Graduate Engineer located in our San Antonio, TX office. She has 3 years of experience with WGI and enjoys brunching in urban neighborhoods with her loyal basset hound, Clyde.

JOIN THE TEAM

You’ve been searching for a place like WGI. We look forward to meeting you soon.

We're
Nearby

Enter your zip code, and we’ll personalize your experience with local projects, office locations, team members, and more.

WGI's success starts with our Associates

WGI supports its associates with meaningful opportunities for growth, strong benefits and perks, while we work collaboratively with clients and co-consultants to shape and improve communities.

Our Team in Action

Join the Team

WGI is a dynamic organization with opportunities nationwide for engineers, land surveyors, landscape architects, environmental scientists, and architects.

Our Leadership

Find a team member:

Let's talk about your next project.