Hydrology — water balance

Each scenario screens the Town Creek's low-flow capacity against the campus's consumptive cooling draw: live flow minus consumptive loss against the 7Q10 design low flow, and the assimilative headroom that remains. Live gauge and permit figures are grounded; scenario draws are labelled assumptions.

baseline

Current municipal loop, no data-center cooling draw.

Cooling model: no cooling-water load

Cooling demand: 0 MGD · consumptive fraction 0 fraction

Consumptive lossmodeled

0cfs

0 MGD x 0 consumptive (scenario baseline)

[inference]

Town Creek 7Q10grounded

0.16cfs

Ohio EPA NPDES fact sheet 2PD00006 (Van Wert WWTP), Table 12 — USGS 04191500 (Auglaize River Near Defiance, 1915-2003) drainage area ratio applied to Town Creek

[verified]

Binding dilutiongrounded

0.03:1

Van Wert WWTP → Town Creek

[verified]

Assimilative screen · 1 of 1 receiving reaches fail the dilution band at design low flow (Van Wert WWTP chronic 0.03:1, acute 0.02:1). The design flow is matched to the criterion type — chronic aquatic-life dilution at the 7Q10, acute at the sharper 1Q10; the effluent-credited ratio counts the permitted effluent already in the reach. A screening band, not a permit determination.

Tier-0 water balance · 1 nodes · modeling caveats:

no abstraction node configured for site 'van-wert'; the water balance omits the intake reach.

buildout

Data-center campus cooling draw (closed_loop_dry) on the municipal supply.

Cooling model: closed-loop dry / air-cooled (“closed loop”)

Cooling demand: 0 MGD · consumptive fraction 0 fraction

Load → cooling → water

500 MW (~349.7–500 MW) IT load [inference] 0 MGD cooling makeup 0 cfs net consumptive

The IT load is inferred from the facility's [verified] air-permit backup capacity (N+1), then carried through the cooling archetype's water math — one derivation, not two headlines. The disclosed MW range widens the consumptive bracket.

Consumptive lossmodeled

0cfs

0 MGD x 0 consumptive (scenario buildout)

[inference]

Town Creek 7Q10grounded

0.16cfs

Ohio EPA NPDES fact sheet 2PD00006 (Van Wert WWTP), Table 12 — USGS 04191500 (Auglaize River Near Defiance, 1915-2003) drainage area ratio applied to Town Creek

[verified]

Binding dilutiongrounded

0.03:1

Van Wert WWTP → Town Creek

[verified]

Tier-0 water balance · 1 nodes · modeling caveats:

no abstraction node configured for site 'van-wert'; the water balance omits the intake reach.