Odd Crash Across Region Line

[BangBangYouAreDead]

I'm fairly new to this modding lark but I've got a solid list already in place, no major errors and the game has been running beautifully. I was recently just outside Rivet City and did a fairly major mod overhaul, got rid of mods I didn't need or like any more, that kind of thing.

 

However, it seems there is now a fault line across two specific regions in the game, just northwest of Rivet City (the EditorID for the area is "IrradiatedMetroExterior"). I've checked all my mods in FO3Edit and there doesn't seem to be anything conflicting to do with that area. I've attached a picture from the GECK to highlight the offending area (the red line shows the general area of where the problem is, hopefully you can see it on the crappy resolution).

 

At first I thought it might be a problem with either the Vertibird encounter or the Super Mutant spawner that is around the area, but to test this I swam across the river to the Citadel and tried to cross the fault line...same result. So it must be some issue that runs all along that whole regional line, presumably across the whole map (although I haven't fully tested whether this is the case yet). I can leave via Anacostia Crossing metro, so it's not leaving the Rivet City region that's the problem, it's entering this faulty one. I've tried reloading earlier saves and that hasn't helped either. Running in windowed mode? Doesn't do a thing.

 

My load order is as follows:

 

Fallout3.esm

Anchorage.esm

ThePitt.esm

StreetLights.esm

BrokenSteel.esm

PointLookout.esm

Zeta.esm

Lings.esm

aHUD.esm

iHUD.esm

CRAFT.esm

CALIBR.esm

Mothership Crew.esm

Alton, IL.esm

DCInteriors_ComboEdition.esm

RH_IRONSIGHTS.esm

EVE.esm

FO3 Wanderers Edition - Main File.esm

Mart's Mutant Mod.esm

Enhanced Weather - Rain and Snow.esm

Project Beauty.esm

Xepha's Dynamic Weather.esm

FireLightFix.esp

RH_IronSights_Basic_VanillaPlugin.esp

RH_IronSights_Basic_AnchoragePlugin.esp

RH_IronSights_Basic_PittPlugin.esp

RH_IronSights_Basic_BrokenSteelPlugin.esp

RH_IronSights_Basic_PointLookoutPlugin.esp

RH_IronSights_Basic_ZetaPlugin.esp

RH_IronSights_Pitt_NewRifleSights.esp

RH_IronSights_RemoveReticule.esp

RH_IronSights_PL_NewItems.esp

BlackWolf Backpack.esp

BlackWolf Backpack - Vendor Script Replenish.esp

BlackWolf Backpack - Blank's Container Patch.esp

megalight.esp

NewMall.esp

Cybernetic Implants Xangi.esp

Dragonskin Tactical Outfit.esp

FaithOutfit.esp

LeatherBackpack - eng.esp

sunglassescollection.esp

Responsive Kill Reactions.esp

UsableCigarettes.esp

PiPBoy White Light.esp

Fellout-Full.esp

Fellout-Anchorage.esp

Fellout-BrokenSteel.esp

Fellout-PointLookout.esp

Fellout-Zeta.esp

ImaginatorFO3.esp

assassin_robe.esp

G- Backpacks raymochilas.esp

A Devil's Wish - Patch v1_4.esp

RR.esp

RR Steel.esp

RR Pitt.esp

RR Lookout.esp

From Los to Ruin.esp

BeardsofFallout.esp

Rivens_Eyescapes.esp

AltonAddon.esp

gasmaskhelmet.esp

BPV.esp

camouflage uniform.esp

eyepatches-english.esp

FerrymansHood.esp

GasMask.esp

Backpacks_witheffects.esp

EVE.esp

EVE Operation Anchorage.esp

FO3 Wanderers Edition - Alternate Travel.esp

FO3 Wanderers Edition - Followers Enhanced (BrokenSteel).esp

FO3 Wanderers Edition - Optional VATS Halftime.esp

FO3 Wanderers Edition - Main File.esp

FO3 Wanderers Edition - DLC Anchorage.esp

FO3 Wanderers Edition - DLC Broken Steel.esp

FO3 Wanderers Edition - DLC Mothership Zeta.esp

FO3 Wanderers Edition - DLC Point Lookout.esp

FO3 Wanderers Edition - DLC The Pitt.esp

BetterGamePerformance.esp

Mart's Mutant Mod.esp

Mart's Mutant Mod - DLC Anchorage.esp

Mart's Mutant Mod - DLC Broken Steel.esp

Mart's Mutant Mod - DLC Point Lookout.esp

Mart's Mutant Mod - DLC The Pitt.esp

Mart's Mutant Mod - DLC Zeta.esp

Mart's Mutant Mod - Master Menu Module.esp

Enhanced Weather - Rain and Snow in Fallout.esp

Enhanced Weather - Sneak Bonus during Storms.esp

WeaponModKits.esp

WeaponModKits - BrokenSteel.esp

WeaponModKits - FWE Master Release.esp

WeaponModKits - OperationAnchorage.esp

WeaponModKits - PointLookout.esp

WeaponModKits - ThePitt.esp

WeaponModKits - Zeta.esp

FO3 Wanderers Edition - Optional Restore Tracers.esp

Realistic Interior Lighting.esp

Realistic Interior Lighting - BS.esp

Realistic Interior Lighting - OA.esp

Realistic Interior Lighting - PL.esp

Project Beauty- Point Lookout.esp

Project Beauty- Broken Steel.esp

Xepha's Dynamic Weather - Main.esp

<--- Merged Patch

I've triple checked the load order and my merged patch fixes every problem I can see. If anyone can give me a fix, I'd be eternally grateful. I'm on-hand to try out anything in-game or otherwise - if you need me too, just ask.