HomeMy WebLinkAboutA BIG A STORAGE PUD PRELIM AND FINAL - 57 93 AND 57 93A - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORT'
CONSTRUCTLON
SEQUENCE
- PROJECT:. A
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STANUARU FURFI C
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93
ONLY. COMPLETED BY:
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DATE: 9/7 /93
Indicate by use
Major modifications
of a
bar line or symbols when
to
erosion control measures will be installed.
approval by.the
City
an approved schedule
Engineer.
may require submitting a
new schedule for
YEAR
----------------------------
MONTH
J IFINtIAItA
---------------------------
TIA
s
AJ D
OVERLOT GRADING
- -----------
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----
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WIND EROSION CONTROL
Soil Roughing
Perimeter Barrier
Additional Barriers
Vegetative Methods
Soil Sealant
Other
13VILD/6J(�
RAINFALL EROSION CONTROL
STRUCTURAL:
Sediment Trap/Basin
Inlet Filters
Straw Barriers
Silt Fence Barriers
Sand Bags
Bare Soil Preparation
Contour Furrows
Terracing
Asphalt/Concrete Paving
Other
BY/G.D.-A16
VEGETATIVE:
Permanent Seed Planting
Mulching/Sealant
Temporary Seed Planting
Sod Installation
Nettings/Mats/Blankets
Oth
STRUCTURES: INSTALLED BY
MAINTAINED BY
VEGETATION/MULCHING CONTRACTOR
DATE SUBMITTED APPROVED BY CITY OF FORT COLLINS UH
HDI/SF-C:1989
STEWART8JkSSG%JATES 103 S. MEL9331 DRUMFAX , I 482-938COLLINS, CO 80521
PH. 482-2
Consulting Engineers and Surveyors
By: R A/9- Date: Q;z/!73 Client: JIM�PR-ttix) Sheet No. of
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Consulting Engineers and Surveyors
103 S. MELDRUM, t . RT COLLINS, CO 80521
PH. 482-9331 FAX 482-9382
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STEWART&46kSSG,JATES
Consulting Engineers and Surveyors
103 S. MELDRUM, i . RT COLLINS, CO 80521
PH. 482-9331 FAX 482-9382
By: P_ A P_ Date: Client: JiAi Sheet No. of
Project: B 1(f, A rT n e A c E
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Consulting Engineers and Surveyors
103 S. MELDRUM, FG.. I' COLLINS, CO 80521
PH. 482-9331 FAX 482-9382
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SSOOOfIATES 103 S. MELDRUM, F. riT COLLINS, CO 80521
STEWART t.7� ` PH. 482-9331 FAX 482-9382
Consulting Engineers and Surveyors
By: 1E A iz Date: q I q3_ Client: J i m GU ,A -r- E,e,ro x, Sheet No. _ of
Project: A B I G 4 J To v_ . A ea ea P V, D,
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Waterson Storage P.M.
Page 2
EROSION CONTROL:
The site is in a high rainfall erodibility zone and a moderate wind
erodibility zone. The site has a good ground cover of grass and weeds. None
of the steep bank down to the Sherwood Ditch will be disturbed. Only Phase
I will be disturbed during its construction. The Phase II area will be
disturbed only during its construction.
A silt fence will be placed along the top of the bank along the entire
northerly fine. It will remain in place during the entire construction period.
Straw bales will be placed at the two area inlets as soon as the discharge
pipes are constructed. After the driveway is paved, the area inlets will be
protected by rock filters. If any area in Phase II or the pond area is
disturbed, it will be reseeded.
The stormwater calculations, grading and drainage plan and the erosion
control calculations are included as a part of this report.
To the best of my knowledge, this report and the drainage plans conform
to the City of Fort Collins Storm Drainage criteria.
If you have any questions regarding this report, please call.
Sincerely,
U �.•�cll�iLA/
Richard A. Rutherford, P.E: & L.S.
President
jrr
enclosures
STEWART&JkSSOCIATES
Consulting Engineers and Surveyors
September 7, 1993
Storm Water Utility
City of Fort Collins
P.O. Box 580
Fort Collins, Colorado 80522
Gentlemen:
The following is the storm drainage report for the proposed Waterson
Storage P.U.D. It is located in Lot 3, Bank Center Square, First Filing.
It is in the Northeast a of Section 23, Township 7 North, Range 69 West of
the 6th P.M. The site contains.1.99 acres. It is bounded on the north by
the Sherwood Ditch; on the east by the Kelly —Moore Paint Store; on the south
by existing commercial buildings, including Montgomery Ward & Co.; and on the
west by the Burlington. Northern Railroad. The site is in the Spring Creek
Drainage Basin.
The site has been approved twice before for development. It was approved
in May 1978 for a warehouse and retail use and again in August 1982 for a
skating rink. The onsite stormwater detention pond that was approved in 1982
was constructed along with the 6—inch corrugated metal outfall pipe into the
Sherwood Ditch,
The Waterson Storage P.U.D. is a proposal for a two—phase self —storage
planned unit development. Phase I will have four buildings, including an
office. The site slopes from south to north at a moderate slope for
approximately 200 feet and then slopes steeply down to the Sherwood Ditch.
There are two offsite sub —basins south of the site which also flow northerly
through the P.U.D. The University Mall, including the Montgomery Ward & Co.
property, lies south of the two offsite basins, and that property drains
easterly to South College Avenue.
It is proposed to continue to drain the property northerly to two area
inlets which will discharge into the existing detention pond. We will also
use the existing 6—inch discharge pipe into the Sherwood Ditch. A restriction
plate will be placed on the 6—inch outlet pipe to restrict the outlet to 0.68
c.f, s.
The required detention is 15,876 cubic feet based on the mass diagram.
The pond has a volume of 20,520 cubic feet.
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
303/482-9331
Fax 303/482-9382
FINAL STORM DRAINAGE REPORT
FOR
WATERSON STORAGE P.U.D.
SEPTEMBER 7. 1993
STEWART & ASSOCIATES. INC.
103 SOUTH MELDRUM STREET
FORT COLLINS, COLORADO 80521
303/482-9331