Innovative Stormwater Design and Hydrology Studies in Atlanta, Georgia

Engineered Protection for Your Investment

Stormwater engineering and hydrology studies are now required on most development sites. Municipalities across Georgia are enforcing stricter stormwater regulations as impervious surface areas increase and watershed impacts grow.

If stormwater is not properly engineered, the financial and regulatory consequences fall on the property owner — not the municipality.

Mack Engineering designs stormwater systems that are compliant, cost-effective, and integrated into the overall project vision from day one.

Why Stormwater Engineering Matters

Stormwater runoff is a natural process. However, once development introduces:

• Roof surfaces
• Asphalt and concrete paving
• Parking lots
• Sidewalks and hardscapes

The amount and speed of runoff increases dramatically.

As impervious areas expand:

• The watershed footprint grows
• Peak discharge rates increase
• Natural infiltration decreases
• Downstream impacts intensify

Without proper management, this leads to:

• Erosion and sediment transport
• Vegetation loss
• Flooding of adjacent properties
• Structural and material damage to neighboring parcels
• Increased liability exposure

Ignoring these impacts during early planning is a direct financial risk.

Hydrology Studies: Understanding Your Site Before Problems Start

A professional hydrology study evaluates:

• Existing watershed conditions
• Pre- and post-development runoff volumes
• Peak discharge rates
• Floodplain impacts
• Required detention or retention volumes
• Downstream conveyance capacity

This analysis determines what your project must do to remain compliant and financially viable.

Waiting until late-stage design to address these requirements typically results in:

• Redesign costs
• Unbudgeted underground infrastructure
• Site layout compromises
• Reduced buildable area

Early analysis protects capital.

Aesthetic, Not Unsightly

Stormwater infrastructure does not need to look industrial.

Modern stormwater design can be:

• Hidden below grade
• Integrated into landscaped areas
• Built into hardscape features
• Architecturally cohesive with the development

Poorly designed above-ground ponds are not the only solution.

In-Ground Stormwater Systems by Cultec

Mack Engineering frequently utilizes in-ground stormwater systems provided by Cultec.

These systems allow us to:

• Maximize usable surface area
• Preserve valuable buildable land
• Avoid large unsightly detention ponds
• Improve site functionality
• Reduce long-term maintenance exposure

By placing detention systems underground, parking lots, green spaces, and amenities remain uninterrupted.

Integrated Stormwater & Landscape Design

We do not treat stormwater as an afterthought.

Mack integrates stormwater solutions directly into:

• Overall grading strategy
• Site circulation
• Landscaping plans
• Hardscape design
• Architectural requirements

This ensures the system is:

• Compliant
• Cost-effective
• Functional
• Visually cohesive

The result is a development that performs technically and presents professionally.

Compliance With State & Federal Requirements

Stormwater systems must comply with:

• NPDES (National Pollutant Discharge Elimination System) permits
• Georgia EPD requirements
• Local municipal stormwater ordinances
• Metropolitan North Georgia Water Planning District standards
• FEMA floodplain criteria
• Georgia Stormwater Management Manual (GSWMM)

Failure to comply can result in permit delays, fines, or stop-work orders.

We design to exceed minimum standards — not merely meet them.

Why Early Involvement Is Critical

Stormwater requirements are increasing every year. Sites that once required minimal detention now require significant underground infrastructure.

Bringing Mack Engineering into your project early:

• Protects your layout from late-stage redesign
• Identifies true development yield
• Clarifies infrastructure costs upfront
• Reduces financial surprises
• Improves overall project ROI

Stormwater design is not just a regulatory requirement. It is a financial control mechanism.

Build It Right the First Time

Effective stormwater design is foundational to successful civil engineering. It protects your project, your neighbors, and your capital.

If you are evaluating land or preparing for development, engage Mack Engineering before design decisions limit your options.

Secure your stormwater strategy early. Protect your investment.