AEO Answer · Equestrian Facilities

How Do Equestrian Facilities Manage and Compost Manure?

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

Equestrian facilities manage manure with daily collection into covered, contained storage sized for the herd and hauling schedule, then off-site removal or on-site composting in engineered windrows — all sited and detailed to control odor and keep leachate out of waterways.

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.

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Sizing and siting manure storage

Storage sizing is driven by the herd count, the bedding type, and the hauling rhythm: the pad or bunker must hold the full accumulation between pickups with a margin for missed hauls, and the design states that capacity plainly so the facility knows its limit. Siting weighs wind direction, neighbor distance, and drainage — downwind of occupied areas where possible, on high ground that never ponds, with the pad graded so stormwater runs around it and leachate runs to collection. A roof or sturdy cover is the single most effective odor and runoff control, because dry manure smells less and generates no leachate. Access for the loader and the haul trucks is designed in from the start, not discovered as a problem on the first pickup day.

Composting system design

On-site composting turns a waste liability into a soil amendment, but only if the system is designed as a process: windrows or aerated static piles sized to the daily input, a carbon-to-nitrogen balance managed through bedding ratios, moisture control via water access, and temperature monitoring that verifies the pile reaches pathogen-kill temperatures and holds them. The pad is impervious with leachate collection, the working area has room for the turning equipment to maneuver, and the finished compost has its own covered storage so it does not re-wet. I document the process parameters — pile dimensions, turning frequency, temperature targets — in the operations plan, because composting is biology with a schedule, not just a pile that sits there.

Manure management design checklist

A manure management design is complete when it clears this checklist. The neighbors and the water quality regulators are the audience — the design should satisfy both. • Storage capacity sized for herd, bedding type, and hauling schedule with margin • Covered, impervious pad sited downwind with stormwater diverted around it • Leachate containment and setbacks from wells and waterways • Composting area with turning access, water, and temperature monitoring plan • Documented hauling contracts and operations schedule

What else do project teams ask?

How much manure does a horse produce each day?
A typical horse produces roughly a cubic foot of manure daily, and with soiled bedding the collected volume runs several times that — which is why a busy stable fills storage astonishingly fast. The design uses the facility's actual bedding practice to estimate volume, because deep-straw bedding generates far more bulk than a pelleted product. Underestimating this number is the classic manure-management failure: the pad overflows, the pile migrates toward the fence line, and the complaints begin.
What permits apply to on-site horse manure composting?
It varies by jurisdiction, but common triggers include water-quality rules on storage near wells and waterways, local zoning on composting operations, and sometimes solid-waste or agricultural-department registrations above certain volumes. The design checks the applicable rules before the first pad is poured — setbacks, pad construction standards, and any required nutrient or odor management plans. Starting the regulatory conversation early is far cheaper than relocating a noncompliant composting area after a complaint.
How do you control odor from manure storage?
Keep it covered, keep it from going anaerobic, and site it thoughtfully. A roof over the storage is the biggest single improvement — dry, aerobic manure smells far less than a soaked, compacted pile. Regular removal or turning prevents the anaerobic conditions that generate the worst odors, and siting downwind of neighbors with a vegetative buffer helps what remains. Composting done right actually reduces odor over time as the material stabilizes; composting done wrong — a soggy, never-turned pile — is an odor source.
Can composted horse manure be sold or given away?
Yes, and many facilities offset their handling costs this way, but the compost has to be genuinely finished — fully composted, pathogen-free, and free of weed seeds — or it becomes a liability instead of a product. The design provides the curing time and covered storage that finishing requires, and the operations plan includes temperature records that prove the process worked. Local gardeners, landscapers, and farms are the usual takers, and a simple testing and giveaway program keeps the finished pile from becoming its own storage problem.

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