Snow Storage Stacking Area and Haul-Off Trigger

SNOW STORAGE IS A LAND-USE PROBLEM DISGUISED AS A WEATHER PROBLEM: the volume that falls has to be put somewhere on the same lot, and unlike water it does not drain away on any useful timescale. WHAT MAKES IT TRACTABLE IS DENSIFICATION. Fresh snow runs roughly 5 to 10 lb per cu ft and a worked pile 20 to 30, so a pile occupies a fraction of the fallen volume -- commonly around a quarter of it, which is the only reason on-lot storage is possible at all. AND WHAT MAKES IT DIFFICULT AGAIN IS THE HEIGHT LIMIT. Without one a pile would be a compact cone; with one it becomes a long low windrow that eats ground, and the difference is large enough to be the whole answer. The limit is not a preference: a pile at a drive aisle blocks sight lines for drivers pulling out, a pile above the reach of a loader or a pusher cannot be built or maintained, and a tall pile in an exposed lot is a wind problem and a melt-and-refreeze problem underneath. Ten to fifteen feet is where operations settle, and the footprint follows from it. Both footprints are computed here so the price of the limit is visible rather than argued. STORAGE IS CONSUMED LINEARLY, NOT GRADUALLY. A winter without a thaw stacks event on event, and the tenant notices at about the second one -- which is when the choices narrow to consuming parking, blocking circulation, or hauling. THE HAUL TRIGGER IS A PLANNING DECISION ALMOST ALWAYS MADE TOO LATE. Capacity is fixed by the area allocated when the site was laid out; accumulation is not. Hauling is slow, expensive, and needs a permitted disposal site, and a lot whose snow plan was written in advance knows which event triggers it while one without a plan discovers it with the loader already running. This is a volume and footprint estimate on entered figures. Snow densities vary enormously -- fresh snow from very light dry powder to heavy wet snow several times denser, and a worked pile densifies further with handling, melt and refreeze, and the dirt and gravel it picks up, so a late-season pile is substantially denser and dirtier than the arithmetic suggests. It assumes no melting between events, which is the design case rather than the typical one; a real requirement is better established from a season's records. It does not address WHERE storage may be placed: drainage and where meltwater goes, sight lines and traffic circulation, fire lanes and hydrant access, accessible parking and routes that may not be blocked, landscaping and pavement damage from piled snow, and the chloride and sediment load in the melt are all site constraints and several are regulatory. It does not address hauling logistics, loading rates, or the permitting and acceptance requirements of a snow disposal site, which vary by jurisdiction and are increasingly restricted. The site's own snow plan, the applicable accessibility and fire access requirements, the local snow disposal regulations, and the property manager govern.

fallen volume = lot area x depth; pile volume = fallen volume x fresh density / piled density; a windrow at a given side slope has base = 2 x height x run-per-rise and cross-section = 0.5 x base x height, so length = pile volume / cross-section and footprint = length x base; the free-cone comparison solves V = pi r^2 h / 3 at the same slope.

Snow densification and prism geometry. Densities and the height limit are ENTERED; fresh snow runs roughly 5 to 10 lb per cu ft and a worked pile 20 to 30.

A density ratio and two solid geometries.

Estimate. AHJ and licensed professional govern.

Field names used by the API: lot_area_ft2, accumulation_in, events, fresh_density_lb_ft3, pile_density_lb_ft3, pile_height_ft, side_slope_run_per_rise, area_per_space_ft2, allocated_pct, fallen_volume_ft3, pile_volume_ft3, base_width_ft, cross_section_ft2, windrow_length_ft, footprint_ft2, footprint_pct_of_lot, spaces_lost, season_footprint_ft2, season_spaces_lost, allocated_volume_ft3, haul_volume_ft3, haul_cy, cone_height_ft, cone_footprint_ft2

• No melting between events the design case, not the typical onea season's own records are better
• Densities are entered fresh 5 to 10, worked pile 20 to 30 lb per cu ftthe site's snow plan
• Idealised windrow a uniform prism at a constant side slope, no end conesprism geometry