John Kerr & Co, 1864-5, incorporating earlier 1820-30 mill, converted to museum and visitor centre. 2-storey with raised basement and attic, 8-bay jute spinning mill. Rubble with ashlar dressings.
E (ENTRANCE) ELEVATION: 7 regularly-disposed windows to ground floor over full-width lean-to slate roof of raised basement, and lean-to roof of later link in bay to right; timber doors close to outer angles at 1st floor, that to left with ironwork fire escape ladder, and later heraldic device at centre. Full-width banded rooflight above.
W (RIVER ERICHT) ELEVATION: 8 windows to each floor except to outer right at basement with timber door.
N AND S ELEVATIONS: ball-finialled gabled elevations each with small window high up in gablehead, that to S over lower wheelhouse (see below), that to N with single 1st floor opening to centre over earlier mill.
Multi-pane glazing pattern in timber sash and case windows. Grey slates. Ashlar-coped skews.
1820-30 MILL: single storey and raised basement, 4-bay, rectangular-plan slated rubble mill with gables to E and W and adjoining above-detailed mill at N; converted 1865 to house steam engine, additional brick-built storey added circa 1960.
BOILER HOUSE AND STALK: single storey, rectangular-plan, slated rubble boiler house with ball-finialled gables and tapering octagonal red brick chimney stalk, reduced to 105'.
WHEELHOUSE: 3-bay, gabled rubble wheelhouse at lower level to S.
ANCILLARY BUILDINGS: timber and corrugated-iron clad links to 2-by 4-bay warehouse at N with 1st floor loading door to E. Isolated slate-roofed ancillaries to E.
Associated concrete lade and sluices.
INTERIOR: timber floors and roof on cast-iron columns, cast-iron roof trusses to single storey N outshot. Single cylinder horizontal engine, 1862-5 by J & C Carmichael (Dundee), 22" cylinder, 4' stroke, 17' flywheel, later drop valves. Waterwheel 1865, by J Kerr (Dundee), 14' wide, 18' diameter, 4 sets cast-iron spokes. Ruston & Hornsby Diesel Engine, 1937. Associated gearing, some line shafting, diesel engines and generator also of interest.