HomeMy WebLinkAboutPVH HEALTH SYSTEMS, HARMONY CAMPUS, 3RD FILING, PRIMARY CARE PLAZA - PDP - 32-98E - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTSEAR• BROWN
Tuesday, February 03, 2004
Basil Hamdan
City of Fort Collins
Storm Water Utilities
700 Wood Street
Fort Collins, CO 80521
209 South Meldrum
Fort Collins, CO 80521
970.482.5922 phone
„ 970.482.6368 fax
www.searbrown.com
RE: PVHS Harmony Campus Primary Care Plaza Addendum to the PVHS Harmony Campus
Master Infrastructure Drainage Report.
Dear Basil:
The Primary Care Plaza is a project that consists of an office building and parking (2.6 ac) that is
located at the southeast corner of Snow Mesa Drive and the north access road. The purpose of this
addendum is to show compliance with the PVHS Harmony Campus Master Drainage Plan.
The site is now a fallow field that drains to the south and southeast. In the proposed condition
the site will located in drainage basin 107 as shown in the PVHS Harmony Campus Master
Infrastructure Drainage Report. The current site fits within the 80 percent impervious area
assumption that has been made in the Master Drainage Plan. Basin 107 releases at a 10-year flow
rate of 11.68 cfs and a 100-year flow rate of 33.63 cfs. The site will drain to the east to a
temporary swale then through a temporary culvert under the fire lane and into the partially
constructed detention pond. It is anticipated that there will be some form of a permanent swale
along the eastern property line of PVHS Harmony Site. The location of the swale will be
relocated in the future depending on how development occurs.
The detention pond will be partially constructed at this time. The outlet structure will be
constructed in its final form with the orifice being constructed at its ultimate size for the site. The
detention pond will be constructed to approximately a third of its ultimate size.
Erosion Control will be addressed with the final drainage report of this project by incorporating
best management practices.
Thank — you for your time and consideration, if you have any questions please let me know.
Yours S' erely,
m Allen -Morley, P.E.
Senior Project Manager