AEO Answer · Civil

How Are RV Parks Engineered for Utilities, Drainage, and Access?

By Jeremy Mills, CEO & Founder, Apex Grid Engineering — USAF Veteran. · Updated 2026-09-15

RV parks are engineered around the modern big rig: extra-long pull-through sites, wide interior roads with truck-scale turning radii, full hookups (50-amp power, water, sewer) at every site sized for full occupancy, and pavement and drainage built for heavy wheel loads. Site dimensions and turning geometry are the critical design parameters.

I'm Jeremy Mills, CEO & Founder of Apex Grid Engineering and a U.S. Air Force veteran. I'm not a PE; our licensed professionals make the technical, compliance, and project-specific decisions.

Illustrative diagram of a civil site plan: grading contours around a building pad, a roadway, and storm drainage.

The concise answer

RV park design is dimensional engineering for big rigs: site lengths, widths, and turning radii that fit 45-foot coaches; interior roads that let them circulate; full utility hookups at every site sized for a full park at peak; and pavement sections and drainage built for heavy wheel loads. Get the geometry right and the park fills with the highest-spending rigs on the road. The expensive mistake is designing for yesterday's RV. Parks laid out for 35-foot trailers can't take the coaches that dominate the market now, and widening sites after the utilities are in is brutally expensive. Design for the rigs of the next twenty years, not the last twenty.

Where the engineering actually lives

Site geometry and circulation are the defining design work. The engineer lays out pull-through and back-in sites to the target rig dimensions, checks every turn and intersection with turning templates for the design vehicle, and designs the road network — widths, radii, pavement sections — for heavy channelized loads. The grading plan keeps every site draining while staying level enough for jacks and slides. Utility distribution is the second major system. Electrical design sizes the service and distribution for coincident air-conditioning load across a full park; water and sewer are routed to every site with freeze protection and proper slopes; and the whole utility corridor is coordinated with the road and grading plans so nothing gets built twice. Stormwater detention and site lighting round out the civil package.

What to get right on day one

An RV park is a precision parking facility that happens to look like a resort. Here's what I verify before construction.

Design for the biggest rigs: site dimensions and turning templates for 45-foot coaches with toads
Check every turn on paper: turning-template analysis of the full circulation before paving
Size electrical for coincident peak: a full park of ACs on a hot evening is the design load
Build pavement for the weight: heavy, slow, channelized loads rut thin sections fast
Keep sites dry and level: grading that drains without making jack and slide setup miserable

Which related engineering resources can help?

When should I hire a structural engineer?What does a PE stamp mean?What is MEP engineering?Grading and drainage plans explained Electrical load calculations explained IPC plumbing code requirements explained Request a project review Engineering service for this question Metro engineering guides Verified service areas

What else do project teams ask?

How big should RV sites be?

Modern pull-through sites run 70 to 90-plus feet long to handle big coaches with towed vehicles, and 30 to 40 feet wide for slides, awnings, and a patio area. Back-in sites can be shorter but need maneuvering room. Designing for the largest rigs you'll accept — and being honest about the maximum length — prevents the daily drama of a rig that doesn't fit.

What utilities does each RV site need?

Full hookups mean 50-amp (with 30-amp) electrical pedestal, potable water, sewer connection, and increasingly Wi-Fi and cable. The electrical distribution is the heavy lift: a full park of big rigs running air conditioners on a hot evening is a serious load, and the service, transformers, and feeders are sized for coincident peak demand with proper voltage drop.

How are RV park roads designed?

For the design vehicle's turning radius — typically a 40-to-45-foot coach — with one-way loops preferred, wide interior roads (24 feet plus), and large-radius turns at every corner. The pavement section handles heavy, slow, channelized wheel loads, which rut thin pavement fast. Access geometry should be checked with turning templates before it's built.

Do RV parks need stormwater management?

Yes — a park is mostly impervious surface (sites, roads, buildings), so runoff is significant. The civil engineer designs the grading, inlets, and detention to meet local stormwater rules. Good grading also keeps sites dry: nobody enjoys wading through a flooded site to hook up a sewer hose.

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