Accessibility

Font Size

100% 150% 200%

Background Colour

Default Contrast
Close Reset

Inchindown, Royal Navy Fuel Tanks

Oil Storage Tank(S) (20th Century)

Site Name Inchindown, Royal Navy Fuel Tanks

Classification Oil Storage Tank(S) (20th Century)

Alternative Name(s) Inchindoun; Invergordon Oil Fuel Depot

Canmore ID 173294

Site Number NH67SE 57

NGR NH 68832 74492

NGR Description NH 68832 74492 and NH 69021 74606

Datum OSGB36 - NGR

Permalink http://canmore.org.uk/site/173294

Ordnance Survey licence number AC0000807262. All rights reserved.
Canmore Disclaimer. © Bluesky International Limited 2025. Public Sector Viewing Terms

Toggle Aerial | View on large map

Digital Images

Interior of valve and winch gear chamber.
Interior of valve and winch gear chamber.Interior, detail of valve and access chamber showing of valve gear and pipes from main tanks.Interior, view to end of piping tunnel.Interior. View from top platform looking down into tank No.5 showing some of the heating elements.General view from SSE of access tunnel portal.Interior, detail of dated commemorative plaque on main oil tank.Interior. Detail of main oil pipe to tank.View from SW of electricity generating sub-station building showing surviving camouflage pattern .View from SSW of ancilliary building above tunnels.Detail of small flow control tank below main tank.Detail of ancilliary water tank with sluice.Interior, detail of switchgear equipment at entrance to piping tunnel.Interior, detail of abandoned equipment near the entrance to the piping tunnel.Detail of small sign on electricty supply pole.Interior. Detail of main valve wheel.Interior. View of main tunnel showing brick work.Interior. Detail of back plate for oil pipes with trolley.Interior. Detail of metal gaskets for pipes with graffiti covered wall.Oblique aerial view of Inchindown, looking NNW.Detail of the entrance to the access tunnel. Royal Navy fuel tank, Inchindown.Detail of top of ventilation shaft of underground access tunnel chamber showing louvred openings.Detail from SW showing stone revetting to the W of service tunnel.View from NW of sub-divided small concrete tank.View from NW of small covered reservoir.Interior view of piping tunnel from entrance are showing bunker oil heaters.Interior showing small winch gear and bottom of oil guage.Interior, view of access alcove with exit pipes from one of the main oil tanks.  In addition a plaque commemorating the completion in 1941.Interior. Detail in chamber at top of shaft leading to Tank No.5 showing remains of fixings.Interior. View in stone cut section of the service tunnel of RCAHMS staff member Ian Anderson.Interior. View of tank 6, showing details of the system of heating elementsInterior. View of the ceiling at the SW end of tank 1, showing the location of the access platform and to the left is the  dipping hole marked by a smear of oil on the ceiling.Detail of the entrance to the access tunnel.General view from SSE of access tunnel portal.View from SW of ancilliary building.View from SW of ancilliary structures SW of the tunnels.Interior view of main piping tunnel.Interior. Detail of corrugated iron replacemnt door leading to tank access.Interior. Detail of brickwork alterations in main tunnel.Interior. View through exit pipes to interior of oil tank no.5.General oblique aerial view from the Inchindown oil storage tanks with Invergordon in the distance, looking SSE.View from SSE of ancilliary building.General view from SSE of the portal to the piping tunnel.Detail of corrugated iron cover to water tank showing access hatches.Interior, detail of lower portion of sample oil guage within an access chamber.Interior, view within access tunnel.Interior, within access tunnel, Mr Allan Kilpatrick (RCAHMS) and Mr Matt Ritchie (Forestry Commission) exitiing.Interior, within access tunnel, Mr Allan Kilpatrick (RCAHMS) and Mr Matt Ritchie (Forestry Commission) exitiing.Interior. View of chamber at top of shaft leading to Tank No.5.Interior. Detail of cleasing access pipe chamber to tank no.5.Interior. View in service tunnel of RCAHMS staff member Ian Anderson.Oblique aerial view of Inchindown oil storage site, showing buildings on the surface, filter beds, square water reservoir and a trackway running from middle to top of photograph which ran between the two tunnel portals and to the spoil heap at the top of the image, taken from the ENE.Interior. View of the service tunnel between tanks 5 and 6, at the point where the tunnel turns 90 degrees to the left.Interior. View of the service tunnel between tanks 5 and 6, at the point where the tunnel turns 90 degrees to the left.View from SE of electricity generating sub-station building showing surviving camouflage patternView from NW of water tank.Detail of portal for the piping tunnel.Interior view back to entrance of access tunnel.Interior, detail of access tunnel roof lighting fixture.Interior. Detail of main oil pipe to tank.Interior. View of chamber at top of shaft leading to Tank No.5.Interior. View of tank 6, showing details of the system of heating elementsInterior. View of the service tunnel between tanks 1 and 2Interior. View of service tunnel beside the access to tank 2Interior. View of tank 1 from the NE end. The dismantled heating elements are propped up against the tank wallsInterior. Details of SW end of tank 1, showing the 18-inch diameter swing arm pipe through which the oil entered and exited the tank. Also visible are the heating elements still in situInterior. View from the SW end of tank 1. Visible at the far end, is a figure of a man, demonstrating the scale and size of  tank 1Detail from WSW showing wall construction and outflow pipe of water tank.Interior, view of chamber at entrance to piping tunnel.Interior, view to end of piping tunnel.Interior, view through exit pipe in end wall of one of the main oil tanks.Interior showing detail of pipe end plate and view into one of the main oil tanks, Royal Naval Fuel Tanks, Inchindown.Interior. Detail of shaft metal ladder to top of tank number 5.Interior. Detail of oil gauge on side of shft.Interior. Detail of upper part of rock-cut part of tunnel.

Administrative Areas

  • Council Highland
  • Parish Rosskeen
  • Former Region Highland
  • Former District Ross And Cromarty
  • Former County Ross And Cromarty

Archaeology Notes

NH67SE 57.00 68832 74492 and 69021 74606

NH67SE 57.01 NH 69324 74056 Structure

The Royal Navy underground oil tanks to supply Invergordon are situated upslope from Inchindown farmsteading. There are two stone and concrete built entrances in the conifer plantation with the tanks tunnelled into the hillside. A pipeline was built from here to the Invergordon base and elements of this can still be traced to Tomich (NH67SE 53), and beyond to the oil tanks at Invergordon.

J Guy 2000; NMRS MS 810/10, Vol.2, 116, Vol.3, 37.

Activities

Publication Account (2009)

The website text produced for Inchindown webpages on the Forest Heritage Scotland website (www.forestheritagescotland.com).

Introduction: The secret store

On the edge of Kinrive Forest, hidden in the side of Kinrive Hill, are two bolted doorways. Today they stand forgotten and unheeded, but during World War II they formed the entrance to a vital part of the British government's defence plan against the Germans and their allies.

The doorways lead to the bombproof fuel tanks beneath Kinrive Hill. Inchindown was one of three secret fuel stores constructed near the main naval anchorages in Britain, in this case Invergordon naval base. The tanks held a specific kind of fuel called Furnace Fuel Oil (FFO). The Royal Navy used this type of fuel for their ships until the late 1960's.

The government needed to keep stores of fuel, in case the German Navy managed to block the ports or destroy shipping convoys and stop fuel supplies reaching Britain from overseas. These supplies of fuel had to be hidden from view and protected or German planes would have targeted and tried to destroy them.

The fuel would make sure the Royal Navy could continue to protect Britain, no matter what happened. In 1941 the Germans did successfully destroy one of the above-ground oil tanks immediately beside Invergordon naval base.

Four miles of pipes connected Inchindown to the naval base, keeping it supplied with fuel and ready for action. The fuel flowed downhill from the stores to Invergordon, but restocking the tanks from the base was more problematic. To get the fuel back up hill they built three pumping stations, the largest located at Tomich.

People Story: Who built these stores?

The construction of the six fuel tanks inside Kinrive Hill was a major feat of engineering.

The tanks are enormous and held almost 32 million gallons of fuel. There were five main tanks and one smaller reserve one. The larger tanks were 9m wide by 237m long and 13.5m high; you could fit 16 double decker-buses end to end into one of these tanks.

The government contracted engineering firm William Arrol to build the depot, who in turn sub-contracted the work out, probably to the construction firm Yemen, Bald, and Hutchison.

It was not an easy task to hollow out the hill. Nor could it have been much of a secret. The hill was selected for its hard rock, and was deep enough to protect the tanks from bombing.

They quarried over half a million tonnes of rock and dumped it on the hillside. This was visible from the air and the Germans probably knew about the construction. The hill provided protection rather than a secret location.

Locals still remember the quarrying of the hill. As well as a local workforce, gangs of labourers from Ireland were hired.

Malcolm MacLeod recalls his father cycling the 5 miles and back from Adross to work a fourteen hour shift drilling the tunnels and tanks.

The tanks had no doors only four circular pipes, through which men had to pass to reach the tanks. The staff lay flat on a gurney, a wheeled board, and slid down the pipes. Today the tanks are clean but it must have been a rather dirty and smelly job.

References

MyCanmore Image Contributions


Contribute an Image

MyCanmore Text Contributions