adds more data

docs/buildings/drainage-channel-albion.md

@@ -0,0 +1,36 @@
+# Drainage Channel (Albion)
+
+**Entity Type:** Building
+
+## Properties
+
+| Field | Value |
+|-------|-------|
+| Category | Infrastructure |
+| Region | Albion |
+| Required Tier | [Mercators](../population-tiers/mercators.md) / [Smiths](../population-tiers/smiths.md) |
+| Dimensions | 1x1 (2x2 with roads) |
+
+## Description
+
+Drains marshland in Albion, allowing construction on previously unsuitable terrain. Priced and maintained per 10 blocks.
+
+## Costs (per 10 blocks)
+
+**Build Cost:** 100 Gold, 4 Timber, 4 Bricks
+
+**Maintenance:** -4 gold/min
+
+## Placement
+
+| Requirement | Value |
+|-------------|-------|
+| Road Required | No |
+| Special Placement | Marshland |
+
+## Related Buildings
+
+- [Aqueduct (Albion)](./aqueduct-albion.md)
+- [Collecting Basin (Albion)](./collecting-basin-albion.md)
+- [Cistern (Albion)](./cistern-albion.md)
+- [Sluice Gate (Albion)](./sluice-gate-albion.md)