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City of Fort Collins, Colorado

Canal Importation Ponds and Outfall (CIPO) Project
City of Fort Collins, Colorado

Canal Importation Ponds and Outfall (CIPO) Project, City of Fort Collins, ColoradoThe CIPO Project has been awarded the 2012 CASFM Grand Award for Engineering Excellence and a 2012 ACEC Merit Award. The project included the design and construction of an outfall for the Canal Importation Basin, including a series of cascading detention ponds, storm sewer inlets and pipe systems, culverts, an inverted siphon, and habitat/natural area enhancements.

The Canal Importation Basin is located in west-central Fort Collins, Colorado, and encompasses approximately 3,200 acres of nearly fully-developed land. In 2001 a Master Drainage Plan was completed by Anderson Consulting Engineers, Inc. (ACE), which identified over $50 million for regional drainage related improvements within the basin. The Canal Importation Ponds and Outfall (CIPO) Project addresses two of the thirteen drainage improvement projects identified in the Master Drainage Plan, with an estimated construction cost of $21 million.

Installation of the 8'W x 4'H RCBC siphon under the Larimer County Canal No. 2

Installation of the 8’W x 4’H RCBC siphon under the Larimer County Canal No. 2

Finished headwall and wingwalls for the 8′W x 4′H RCBC siphon.

Finished headwall and wingwalls for the 8′W x 4′H RCBC siphon.

The purpose of the CIPO Project was to develop an outfall for the Canal Importation Basin, that would collect, detain, and convey storm water runoff generated within the basin, and discharge to Spring Creek. This project consisted of the following:

  1. Hydrologic modeling of the tributary drainage basin to define design discharges;
  2. Formulation and hydraulic design of all listed drainage improvements;
  3. Final design of three regional detention ponds, providing nearly 140 acre-feet of active storm water detention capacity;
  4. Final design of over 2 miles of subsurface drains;
  5. Final design of a 700 foot long, 12-inch diameter water line;
  6. Final design of approximately 750 feet of 8-inch diameter PVC sanitary sewer lines;
  7. Final design of a nearly 900 foot, 16-inch diameter PVC sanitary sewer line;
  8. Final design of a 112 foot, 8’W x 4’H RCBC siphon under an irrigation ditch;
  9. Final design of a 175 foot, 48-inch RCP siphon under a major roadway arterial;
  10. Final design of a 745 foot storm sewer consisting of 42-inch RCP, 36-inch RCP, and 33-inch RCP;
  11. Final design of a 415 foot storm sewer consisting of 7’W x 3’H RCBC, 48-inch RCP and 42-inch RCP;
  12. Final design of a 550 foot storm sewer consisting of 42-inch equivalent HERCP, 42-inch RCP and 12-inch PVC;
  13. Final design of a 56-foot storm sewer consisting of 30-inch RCP;
  14. Final design of a 20-foot storm sewer consisting of a 48-inch RCP;
  15. Final design of several smaller drainage improvements (spillways, cutoff walls, swales, water quality outlet structures, etc.);
  16. Final design of erosion control measures (riprap and turf reinforcement mat);
  17. Preparation and coordination of a 91 sheet set of final design drawings, technical specifications, and contract documents;
  18. Preparation of an Individual 404 Permit for the U.S. Army Corps of Engineers;
  19. Preparation of a well permit for the State Engineers Office;
  20. Preparation of a Floodplain Use Permit for the City of Fort Collins;
  21. Assisted in preparation of the Storm Water Management Plan;
  22. Preparation of as-built drawings (currently ongoing);
  23. Construction management services during the approximately 3-year construction time period (currently ongoing); and
  24. Preparation of a design report documenting post-project condition results and residual floodplain information.
Installation of a storm sewer junction box

Installation of a storm sewer junction box

Excavation of the Red Fox Detention Pond

Excavation of the Red Fox Detention Pond

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