Troy
Section 1 · 6 pieces

The water gets the first say

The flood-control system that makes the town possible: five dry dams, a raised levee, the 1913 event that set the design, and Arthur Morgan's district.

Rock-covered sloped face of an earthen dam beside a reservoir under cloudy skies
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A Dam That Stores Nothing

The structural logic of a dry retarding basin: embankment, ungated conduit, and the design water surface. Argues that the absence of a gate is the whole idea, not an omission.

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Aerial view of a small dam and spillway channeling green river water through wooded terrain The Great Miami

Englewood, Germantown, Lockington, Taylorsville, Huffman

The five Miami Conservancy District retarding basins — their locations on the watershed, their individual capacities, and how they operate as a system rather than as five separate structures.

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Small propeller plane parked beside a concrete floodway with workers standing nearby The Great Miami

The Engineer Who Refused the Reservoir

Arthur Morgan's founding logic for the Miami Conservancy District in 1915: why he rejected impoundment in favour of empty valleys and ungated conduits, and how the district's taxing authority over the whole watershed made the system buildable.

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Aerial view of a river dam and lock system with a barge alongside wooded banks The Great Miami

The Levee Has Been Raised More Than Once

The construction history of the Troy levee through the middle of town — the original channel work, and the later raises that followed each revision of what the Great Miami might do at peak discharge.

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A water level gauge partially submerged in a still flooded wetland with bare branches The Great Miami

March 1913, Read Through the Gauge

The March 1913 flood as an engineering datum: the peak discharge figures, the affected reach of the Great Miami valley, and how those measurements became the design standard the conservancy district was built to exceed.

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Muddy water flows through a concrete spillway channel into an arched tunnel outlet The Great Miami

What the Conduit Mouth Tells You

The Taylorsville dam outlet works — the dimensions of the ungated opening, the stain line on the concrete above it marking historical water-stand depth, and what normal-condition flow through it looks like versus a wet week in March.

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39.50°N39.75°N40°N40.25°N84.75°W84.50°W84.25°W84°W83.75°W Lockington DamTroyTaylorsville DamEnglewood DamHuffman DamGermantown Dam 10 miles
The five basins and the town on the main stem between them, with the Ohio line to the west. Ten miles to the bar.Projected from the pack's map coordinates

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