5/15/2014 10:49:00 AM New Byllesby Dam spillway set to be tested
by Ken Haggerty
Dakota County Water Resources gave an update on the $7 million Byllesby Dam project to the Lake Byllesby Improvement Assn. recently.
The project, with Edward Kraemer & Sons as the general contractor and Steel-Fab making the gates is reported as on progress for completion this year. No impacts on water level are expected from the work.
40,000 cubic yards of rock and other material has been excavated.
6,000 cubic yards of complex concrete stuctures have been poured.
Two 65 foot by 14 foot crest gates have been made and installed. Each gate is 40 tons.
Four hydraulic cylinders (three tons dry weight) have been installed.
A 40 foot tall post tensioned connection wall is in.
Access bridges for maintenance are in.
A control building and backup systems are in.
Upstream gauges have been added by USGS in Northfield and Faribault. Also on tributaries Chub and Prairie Creeks,
Weather station with lake level data now available at www.byllesbydam.org/weather.html.
This is updated every 15 minutes.
New severe weather siren added by the dam.
Still to come:
Wet gate testing and gate commissioning in May. Involves water against the gates, partial testing of gates. Not enough to impact water levels above or below.
Substantial completion by mid-Summer of 2014.
At Gerlach Way, starting in May with two foot rise of embankment. No impact to residents or access. Finish by August, 2014.