Stormwater Injection Wells Boost Developable FL Land & ROI
Updated: Oct 3
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How Stormwater Injection Wells Can Free Up Developable Land
In South Florida, surface stormwater ponds can take a large share of a site. Where geology and permits allow, a stormwater injection well can move part of that management underground and return land to buildings, parking or lots.
The decision belongs in feasibility, before the site plan is set.
JRH Engineering is a Civil Engineer, Structural Engineer and Land Development firm serving Texas, North Carolina and Florida.
JRH guiding principles are: Engineering Excellence. Delivered on Time. Built on Value.
How Injection Wells Work
Runoff is collected, stored and pretreated to meet water-quality rules
Treated water is directed into a designed well and an appropriate subsurface formation
The U.S. EPA classifies stormwater drainage wells as Class V wells under its Underground Injection Control program
In Florida, UIC wells are governed by Chapter 62-528, F.A.C., through FDEP's Aquifer Protection Program
What a Subsurface Investigation Should Evaluate
Seasonal high groundwater
Soil and rock formations and the receiving formation's depth
Hydraulic conductivity
Groundwater quality and protection
Likely well depth and construction
The geotechnical and hydrogeological investigation is performed by others; JRH coordinates the civil design around it.
Where the ROI Comes From
Do not compare the well's cost to a pond's cost alone
Compare the cost of the alternative system to the value of the land it frees up
Project: Underground Detention Pond Expansion, Channelview, TX
This Texas project did not use an injection well, but it shows the same goal: meeting stormwater rules without giving up surface land.
Industrial warehouse expansion in the floodplain in Channelview, Harris County
Reviewed by the Harris County Flood Control District (HCFCD)
Read the full Channelview case study
Challenges
HCFCD required detention pond storage for the new impervious area
The site had no room for an above-ground pond
Objectives
Provide the required storage volume.
Keep the full site usable.
Solutions JRH Engineering Provided
Civil engineering design for the building expansion
An underground detention pond system sized to HCFCD requirements
Capacity calculations and documentation for HCFCD review
Results:
No surface area used for detention pond storage
HCFCD floodplain permit issued
Land-Efficient Stormwater in Florida, Texas and North Carolina
Florida
See the EPA Underground Injection Control program, FDEP Aquifer Protection Program and the FDEP Environmental Resource Permit program; also see How Flat Terrain Affects Florida Drainage.
Texas
Underground storage and lift stations are more common land-saving tools; see Detention Pond vs Retention Pond vs Underground Systems.
North Carolina
JRH Engineering has not designed an NC injection well project; local stormwater ordinances and G.S. 113A-57 erosion control rules apply.
Frequently Asked Questions
What is a stormwater injection well?
A system that sends treated stormwater into a designed well and suitable subsurface formation instead of a large surface pond.
Are stormwater injection wells regulated?
Yes; EPA classifies them as Class V wells, and Florida regulates UIC wells under Chapter 62-528, F.A.C.
Do injection wells eliminate stormwater requirements?
No, storage, water-quality, groundwater and permitting rules still apply.
Why evaluate injection wells during feasibility?
Because feasibility depends on subsurface conditions that shape the site layout.
How should developers judge the ROI?
Compare the system's cost to the value of the developable land it frees up.
Does JRH Engineering obtain building permits?
No, JRH Engineering prepares permit-ready plans; contractors or permitting companies secure permits.
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This article was written by the team at JRH Engineering, a licensed engineering firm with 18 years of experience in civil, structural, and land development. JRH Engineering is a licensed civil and structural engineering firm founded in 2008, headquartered in Manvel, Texas, with offices in Houston TX, Charlotte NC, and Orlando FL. Certified WBE, WOSB, and HUB-eligible. Phone: (800) 227-9635 | sales@jrhengineering.net | jrhengineering.net. Texas PE license is F-10385. North Carolina PE license is P-3118. Florida license is 38516.
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