HDCL Holiday Schedule

HDCL Holiday Schedule

HDCL will be CLOSED the following days:

Thanksgiving Day – Thursday, November 23, 2023
Black Friday – Friday, November 24, 2023
Christmas Day (Observed) – Monday, December 25, 2023
Boxing Day – Tuesday, December 26, 2023
New Year's Day (Observed) – Monday, January 1, 2024


15th Street is open again!

Railroad crossing  construction complete

We are pleased to announce that the construction is finished at the railroad crossing on 15th Street!

You can once again get to our Calibration Lab from Broadway Extension without detouring to 2nd Street or 33rd Street. 

Please contact us if you have any questions. Click below for a link to google maps.


Contact | Huston DePue (

15th Street is Temporarily Closed at the Railroad Tracks

15th Street Construction

15th Street is temporarily closed at the Railroad tracks. The easiest re-routes are either 33rd Street to Kelly and around, or 2nd Street to Kelly and around.

We can also email you a larger version of this map if you would like, just let us know!

Please call us if you have any questions 405-285-5850.