Boulder, July 2-7, 1921

"Crops were destroyed; Lafayette badly washed. Crops in the region of Broomfield were wiped out by the storm according to Commissioner Hill who made an automobile trip this morning to Marshall, Superior, Broomfield, Louisville and back to Boulder by the Arapahoe Road. Coal Creek was reported to be running high and Mr. Hill was told by George Miller of Lafayette that several houses had been washed away by this stream in Lafayette. South Boulder creek is reported to be behaving nicely. Mr. Hill stated that no damage had been done in the mountains by high water. Over near Hygiene and Longmont, many bridges across irrigating ditches were so badly weakened by the storm and the heavy flow of water in the streams that they will have to be rebuilt. A number of irrigation ditches broke their banks and flooded fields. This was true in the Broomfield district also. The ditches had been carrying unusually heavy flows of water which the storm naturally increased. Mr. Hill stated that it would be impossible to estimate the damage to Boulder county, on roads and bridges, for several days. Boulder creek is running high but no more than usual after a heavy storm."

" A survey of conditions in the district around Erie and Lafayette was made by Charles F. Snow this morning and he has brought back the most authentic reports so far. Mr. Snow left Boulder early this morning.... He stated that the flooded area in that district varied from a few hundred feet in width to a half a mile or more. In Lafayette three houses had been washed from their foundations near the Standard mine, bridge had been washed out and a coating of mud plastered over everything. In Erie, which was put almost completely under four feet of water, the flood poured thru the street like a mill race, carrying away houses, buildings, livestock and every moveable article. One man reported the loss of 26 head of cattle and several hogs and chickens. Another man had just purchased a brand new piano and moved it into his home. After the flood not a trace of the house or the piano could be found anywhere, and many miners who were living in the low-lands along the creek have nothing but their land left. In the town of Erie itself several houses have been moved out in the street and about 300 feet of railroad was picked up bodily and moved several feet until it was stopped by a row of trees.

"In Longmont from 3 o'clock yesterday afternoon until this morning a steady stream of water two feet deep poured down 5th and 6th Avenues and Pratt, Kimbark, Emery and Collier streets. The flood in this case was caused by overflow from several big irrigation ditches north and west of the city and especially from the Right and Ready ditch and the Oligarthy Supply ditch. The race track was turned into a lake and the new city auditorium was flooded to a depth of several feet, and the opera chairs are floating around loose on the surface of the water. The water came so swiftly that damage resulted to many buildings, especially to the Empson Packing company factories. The foundation of the Christian church is said to have sunk 15 feet in places. The St. Vrain was converted from a small stream into a torrent a mile wide and several bridges have been reported as washed out.

"In the district east of Longmont the flood was even worse in places and at Fredrick the Evans mine was flooded and ground above the mine is sinking and cracking. All roads in that district are impassable. At Greeley the flood did not do so much damage but the city has been without power of any kind for several hours because of a breakdown in the Northern Colorado Power line in which some 15 poles washed away.

source: http://bcn.boulder.co.us/basin/history/1921flood.html