DASQUE/MIDDLE CREEK HYDRO-ELECTRIC | 2014 CULVERT RE-WORK The re-work of this under-penstock culvert was necessary due to previous installation not meeting specifications. To meet this project’s critical design specs, the correct inlet/outlet elevation had to be exact to maintain slope ratios. This allowed proper development of bowl sizes, culvert to penstock seperation, pipe coverage and finished road width. Using a laser level from a 4 meter off-set stake, the crucial elevations for inlet/outlet were met within 1cm of specs after the final check from our surveyor. With the water controlled, I was able to excavate and achieve ideal density on our finished culvert invert grade. The bottom of the 48” HDPE (backfilled in the final pictures) had the required 20cm separation from the top of culvert. Finished pipe coverage called for 1.5 meters of structural fill, which after our final spread of fine blast rock, fit the design perfectly. MIKE PEDERSON [email protected] (604) 966-4153