HomeMy WebLinkAboutSUN DISK VILLAGE FINAL SUBDIVISION - 15 91A - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTSTORM DRAINAGE REPORT
SUN DISK VILLAGE
PREPARED FOR
GIULIANO AND FATHER CONSTRUCTION, INC.
PREPARED BY
STEWART & ASSOCIATES, INC.
MAY 6, 1991
1
COMPUTATIONS
Stewart & Associates, Inc. .214 N. Howes St.. Ft. Collins, CO 80521 (303) 482-9331
By: Date S Client:-6lullPno 4 Farber Sheet No. of
Chkd By: Date Project: Sv h D 1 S IT Rf-'D14 -
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LOCATION AND DESCRIPTION OF SITE:
Sun Disk Village is located in the Southwest 'I of Section 26,
Township 7 North, Range 69 West of the Sixth P.M. The site is north
of Horsetooth Road and east of Windmill Drive. The existing
Foothills Park Subdivision lies to the east, Horsetooth Road lies
to the south, Windmill Drive and an existing detention pond lie
to the west, and a regional drainage channel runs along the north
side of the site. There is an existing subdivision north of the
regional drainage channel. The gross area of the site to the
centerline of adjoining streets is 10.036 acres. The south part
of the site is partially developed with 3 existing condominium
buildings and their adjoining drives and parking and with 2 lots
for future condominium buildings. The north 6.5 acres is existing
bare ground with some vegetation. The site is within the Foothills
Drainage Basin.
EXISTING DRAINAGE CONDITIONS:
The existing site drains north to the regional drainage Swale,
except Horsetooth Road, which drains to the east. The existing
condominium development drains undetained through the undeveloped
6.5 acres to the regional drain Swale. There have been no drainage
facilities constructed on the site, other than the regional drainage
Swale.
PROPOSED DEVELOPMENT:
The undeveloped north 6.5 acres is -being replatted into single
family residential lots and a detention pond tract. The detention
pond is sized to provide detention for the total 10 acre Sun Disk
Development. Runoff from the existing condominium development will
drain on the surface via a pan between the southerly single family
lots, then along the west gutter of Sun Disk Court to a catch basin,
then through a pipe into the detention pond. Release from the
detention—pond—wi-l-l—be—di r-ectlyinto—the-r-egi ona-l—dr-a.ipage-swale.
There are 3 critical flow points: the flow between the
southerly lots from the condominium site, the flow in the pan across
the entrance drive on the west gutter of Sun Disk Court, and the
flow into the catch basin and between lots into the detention pond.
There are 2 areas of the site which will not flow to the
detention pond. Runoff from the east half of Windmill Drive follows
the existing gutter and a pan across the entrance into Sun Disk
to a catch basin which drains to an existing detention pond on Five
Oaks Village Phase 1. Runoff from rear yards of the 11 lots along
the east property line will drain to a back yard swale which runs
north and directly into the regional drainage swale.
Sun Disk Village Drainage Report
May 6, 1991
Page 2
It is the developer's intention that the detention pond tract
be deeded to the City for permanent maintenance, after the pond
construction and vegetation have been accepted by the City.
The attached calculation sheets show the allowable release
rate, the required detention volume, and flow rates at critical
points. The attached map shows the proposed site improvements with
critical points and sub —basins.
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Phillip I. Robinson, P.E. & L.S.
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COMPUTATIONS
Stewart & Associates, Inc. 214 N. Howes St. Ft. Collins, CO 80521 (303) 482-9331
By: PITZ Date s 9J Client: G/ n 0 . /-ash er Sheet No. _ -of
Chkd By: Date Project: Sv n -D i ..5 I5eflla4z
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COMPUTATIONS
Stewart & Associates, Inc. 214 N. Howes St. Ft. Collins, 'CO 80521 (303) 482-9331
By: E) lz Dates 9 Client: Giuliano 4-FniAer Sheet No. S of
ChkdBy: L Date Project: sc/n Disk EPV6E
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COMPUTATIONS
Stewart & Associates, Inc. 214 N. Howes St. Ft. Collins, CO 80521 (303) 482-9331
By: PUS Date S G Client: Sheet No. of
Chkd By: Date Project: -
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COMPUTATIONS
Stewart & Assoclates, Inc. 214 N. Howes St. Ft. Collins, CO 80521 (303) 482-9331
By: P; ES Dates) Client: Sheet No. 7 of
Chkd By: Date Project: Sv n Ti % S e pl a �"
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COMPUTATIONS
James H. Stewart & Assoc. Fort Collins, Colorado
By: Sij Date S 9 Client: ��y���d Sheet No. of
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