HomeMy WebLinkAbout217 W. TRILBY RD. - PDP - PDP120006 - REPORTS - DRAINAGE REPORTMarch 20, 2013
Mr. Glen Schlueter & Mr. Wes Lamarque
Storm Water Department
City of Fort Collins
700 Wood Street
Fort Collins, Colorado 80521
RE: 217 West Trilby Road; Affordable Roofing Inc.
Dear Mr. Schlueter & Mr. Lamarque,
Enclosed you will find Landmark Engineering’s completed Preliminary Drainage Report for the 217 W.
Trilby (Affordable Roofing) PDP submittal. This report, along with the Overall Utility Plans, exhibits the
hydrology calculations necessary to show that the storm flows generated above and within this project’s
limits are handled by the proposed on-site drainage system and the proposed detention facilities. There
are three items of note that are usually commented on, which I felt should be briefly discussed. The
first item is there is no detention within parking lots, as there was in the first preliminary report. The
second item involves the detention pond release locations. In the past we’ve seen that, even though
with detention we reduce flow rates during the 100-year storm event, comments seem to come back
pertaining to sign off by ditch companies or historic water stakeholders. For this reason on this project,
we have submitted a letter from North Louden Ditch Company, and it states that they are o.k. with
relocating the ditch and/or piping the ditch. There has been a Ditch signature line incorporated on the
cover of the Utility Plans. The third item involves the environmental comments, which asked for
anecological evaluation to be performed on the north Louden Ditch. The Ecological Characteristic
Report has been submitted with this PDP packet. With that, I believe that the major challenges of
drainage aspects have been addressed.
We look forward to your favorable consideration of our Preliminary Drainage Report and aim to
address any comments during our final submittal process. If you have any questions or concerns, please
do not hesitate to contact me at the above phone number or by email at thalopoff@jrengineering.com.
Sincerely,
JR Engineering, LLC
Tim Halopoff, PE
Project Manager
Enclosure
Cc: File