HomeMy WebLinkAboutDrainage Reports - 03/20/1996MOMPT7 OF
'
FORT 0- . ";60.&.i.HTIEB
!�ar�a1 e� Report
6
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FINAL DRAINAGE REPORT
FOR
'
TELLEZ ESTATES SUBDIVISION
1
'
PREPARED FOR
JOHN H. NELSON
1
March 20,1996
1
r
'
STEWART & ASSOCIATES, INC.
103 SOUTH MELDRUM STREET
FORT COLLINS, COLORADO 80521
970/482-9331
I
'
March 20, 1996
'
Mr. Basil Hamdan
Stormwater Utility
City of Fort Collins
P.O. Box 580
'
Fort Collins, CO 80522
' Dear Basil:
STEWART&ASSOCIATES
Consulting Engineers and Surveyors
' The following is the final drainage report for Lots 1 and 2, Tellez Estates Subdivision. Tellez
Estates is an existing two lot subdivision at the Northeast comer of Greenbriar P.U.D.. It is situate
in the Northeast 1/4 of Section 1, Township 7 North, Range 69 West of the 6th P.M., Fort Collins,
Colorado. The net area ofthe lots is 0.58 acres, and the gross area of the subdivision, including one
half of Lemay Avenue, is 0.80 acres. The Northeast 0.12 acres of the parcel are in the Dry Creek
' Drainage Basin and drains to the Northeast to Lindenmeier Lake. The remaining 0.68 acres are in
the Greenbriar Drainage Basin and drains Southwesterly to Dry Creek.
' Mr. Nelson is going to build one single family residence on both lots. The site had a farm
house, a garage or barn and several out buildings that were tom down after July 1978. The historic
impervious area was approximately 2300 square feet and the developed. impervious area is
' approximately 6,700-square feet.
We are not proposing to have onsite detention, due to the historic improvements and due to
' the fact that Tellez Estates is a replat of a part of Greenbriar P.U.D., and its stormwater runoff was
included in the Greenbriar P.U.D. detention calculations. Also, no detention was required in 1986
when the Tellez Estates lots were replatted. As stated before, only one house is being constructed
on the two lots rather than the two residences that were planned in 1986.
The historic drainage from the part of the lots in the Greenbriar Drainage Basin flows
' Southwesterly and will enter the irrigation lateral that is offsite and parallel to the Southerly Tine of
Tellez Estates. The utility plan that was approved in 1986 has a note that the lots must be graded in
' such a manner that no r noff would enter the lateral A copy of that plan is enclosed in this report for
your reference. The nmofffrom sub -basin D.B: 1 will be carried in a swale to a 4 inch diameter pipe
that will carry the runoff to an existing manhole on the existing 36 inch diameter storm drain. The
' existing storm drain is in an existing 30 foot wide easement which will allow this construction to be
done.
' The site is in the moderate wind erodibility zone and in the high rainfall erodibility zone. Silt
fences will be placed along the Southerly and Easterly property limes. The existing grasses will not
be disturbed on 0.21 acres. The foundation of the house will prohibit erosion on 0.08 acres.
' 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 Drainage Report
Tellez Estates Subdivision
Page 2
The stormwater runoff calculations and the erosion control calculations and the grading and
drainage plan are enclosed as a part of this report.
This drainage report and the design of the drainage system for this project are in compliance
with the City of Fort Collins Storm Drainage Design Criteria.
If you have any questions regarding this report, please call.
Sincerely,
Richard A. Rutherford, P.E. & L.S.
President
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enclosures
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STIEWAU&A.LSSOCIATES 103 S. MELDRUM,
FORT COLLINS, CO 80521
Consulting Engineers and Surveyors PH. 482-9331 FAX 482-9382
By: RA Ae, — Date: Fisla. it., /9? Client:. J 0,A4,4j AJr=z-,ro,,J Sheet No. 3 of_
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STEWART&kSSOCIATES 103 S. MELDRUM, FORT COLLINS, CO 80521
Consulting Engineers and Surveyors PH. 482-9331 FAX 482-9382
By: A R- Date: -P'�a. Gdq Client: Joi.4m Alisz--rolj Sheet No. + of
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Consulting Engineers and Surveyors
By: fz A-ge Date: ,CEp, A. 6, MI Client: _1 n Ej ,y it/ Ft-rn .ci Sheet No. Hof
Project: 7-1E L- i_ E 7- F r 7-A z,� r Jug B n r ti If /n /-j
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PERFORMANCE STANDARD EVALUATION
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PROJECT: T6c.cez GsTA7ei
STANDARD FORM A
COMPLETED
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DATE: FEg.ywy&
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DEVELOPED
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EFFECTIVENESS CALCULATIONS
PROJECT: TEGLEL EJrArav
COMPLETED BY: R A je,
STANDARD FORM B
DATE: Fezy. s, /9!G
Erosion Control
C-Factor
P-Factor
Method
Value
Value
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MARCH 1991 8-15 DESIGN CRITERIA
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CONSTRUCTION SEQUENCE
�ROJECT: TE LL E L E S TA TeS STANDARD FORM C
EQUENCE FOR 19 1& ONLY COMPLETED BY: R A DATE: Fag.
ndicate by use of a bar line or symbols when erosion control measures will be installed.
Major modifications to an approved schedule may require submitting a new schedule for
roval by the City Engineer.
'pp
111% YEAR I
MONTH S I F. I M I A I
OVERLOT GRADING
�ND EROSION CONTROL
Soil Roughening
Perimeter Barrier
'Additional Barriers
Vegetative Methods
Soil Sealant
' Other
�INFALL 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
' VEGETATIVE:
Permanent Seed Planting
'Mulching/Sealant
Temporary Seed Planting
Sod Installation
Nettings/Mats/Blankets
' Other
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&UCTURES: INSTALLED BY MAINTAINED BY
ETATION/MULCHING CONTRACTOR
DATE SUBMITTED APPROVED BY CITY OF FORT COLLINS ON
1
MARCH 1991 8-16 DESIGN CRITERIA
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