HomeMy WebLinkAboutDrainage Reports - 07/19/2004' STORM DRAINAGE & EROSION CONTROL REPOR
FOR
HECKART SUBDIVISION
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LOCATED IN THE CITY OF FORT COLLINS
WEST VINE BASIN
PREPARED FOR
FRANK HECKART
APRIL 20, 2004
PREPARED BY
STEWART & ASSOCIATES, INC.
P.O. BOX 429
103 SOUTH MELDRUM STREET
FORT COLLINS, CO 80522
TEL: 970.482.9331
' FAX: 970.482.9382
1
' HGCKART SUB dmg tptdo.dot
8
STEWART&kSSOCIATES
' Consulting Engineers and Surveyors
1
April 20, 2004
' Mr. Basil Hamdan
Stormwater Utilities
' City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522-0580
' Dear Basil,
' This project will develop two residential lots from one residential lot. The site area is 1.63 acres
gross. The site is in the City of Fort Collins West Vine Basin, Sub -basin No. 50. It is located in
' the Southeast 1/4 of Section 9, Township 7 North, Range 69 West of the Sixth P.M., Fort
Collins, Larimer County, Colorado.
We are proposing to not have any detention, or extended detention on this project, as we are
below the 45% 100-year impervious condition allowed in this sub -basin.
' We have placed a gravel filter around the new proposed curb inlet and two sections of silt fence,
one section along a portion of the East line of Lot 2, and the other section across the existing
drain swale. These shall remain in place during construction.
' There will be a $ 1,000.00 erosion control escrow required for this project.
' If you have any questions or need any more information regarding this project, please let me
know.
Sincerely,��j.�.►� �.
t
Franklin D.
FDB/meh
James H. Stewart and Associates, Inc.
103 S. Meldrum Street • P.O. Box 429 • Ft. Collins, CO 80522
' HECKARTSUB dmg,ptdm.ant 970/482-9331 • Fax 970/482-9382
VICINITY MAP
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' STROM DRAINAGE AND EROSION CONTROL
HECKART SUBDIVISION
' PROPOSED DEVELOPMENT:
The proposed Heckart Subdivision is situate in the Southeast 1/4 of Section 9, Township 7
' North, Range 69 West of the Sixth P.M., Fort Collins, Larimer County, Colorado. It is in Sub -
basin Number 50 of the City's West Vine Basin. The site area is 1.63 acres more or less.
This project will be to develop two residential lots. There is an existing house and separate
garage which will be on one lot. The new building lot will be located in the Southwest corner of
the property and will be 12,650 square feet.
EXISTING CONDITIONS:
The property is bounded on the North by Laporte Avenue; on the East by undeveloped land and
' the New Mercer Ditch which cuts across the Northeast corner of this site, on the South by
undeveloped land; and on the West by the Tenth Green Second Filing which is fully developed.
There is an existing house and garage which will remain with this development. There is an
existing well located on the East side of the property. The property has a low point on the East
property line about 215 feet North of the Southeast property corner. All runoff is to this location.
The slope from the Southwest corner to this low point is about 1.5%. The slope from the
' Northwest corner is about l%. There is existing curb and gutter across the loth Green Second
Filing along LaPorte Ave that dumps runoff on to our site. It then flows across the North side of
this site to the low point which then flows into the New Mercer Ditch. Runoff also flows into an
' area inlet on the South side of the main asphalt road on LaPorte Avenue. There has been some
new asphalt patching and placement to help direct runoff into this inlet recently. The pipe from
this inlet is Southeast directed to the New Mercer Ditch. All runoff from this site is to the New
' Mercer Ditch. There is no runoff onto this site from the East. There is runoff onto this site from
the South, West, and North.
' DEVELOPED CONDITIONS:
This project will be to develop two residential lots, one is 12,650 square feet and the other one,
which will be the existing house and garage is 49,660 square feet.
' The only proposed improvements to the developed site will be the six foot sidewalk along
' Laporte Avenue; upgrade the existing driveway to be 20 feet wide and extend it to the new house
in back; and construct the new house which is a proposed modular at this time.
' This project will not have detention or extended detention with the construction of the house.
The allowable impervious percent for the 100-year event used for the Sub -basin No. 50 was
45%. This project's impervious percent is 24%, therefore with the development of this site we
' are below the allowable. Also, the new roof drains will be directed to grass swales and then
directed offsite as it does historically not requiring detention or extended detention.
' We have placed a gravel filter around the new proposed curb inlet and two sections of'silt fence,
one section along a portion of the East line of Lot 2, and the other section across the existing
drain swale. These shall remain in place during construction,
trierKnersuudrngrpl.d cd.t
STEWART&ASSOCIATES III S. PH 82 933D1RUM, FAX FORT COLLINS, CO 80521
Consulting Engineers and Surveyors / 2- 1
By: // Date: - / Z .5 Client: 3hfi ��H 2� L Sheet No. of
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Project: Project: /YPGK//2eT
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REVISION ROUTING SHEET
DA rE RECEIVED :
'FILE: PROJECT PLANNER
ENGINEERING PAVEMENT
ZONING
BUILDING INSPECTION
LIGHT & POWER
'TECHNICAL SERVICES
FORESTRY
WATER & WASTEWATER '
PFA
POLICE - LORI DIGLIANI
ADVANCE PLANNING
' STREETS
R.O.W. PLANNING
'WATER CONSERVATION
POST OFFICE
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Manhole Inventory
Manhole #:
ww10654 Old #: 03G-o52 Active:
Yes
No: Blk: Dir: Street Name: Type: Sufx:
ApartNo:
Address:
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2208 f LAPORTE AVE
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Qualifier:
N.E. OF 2105 LAPORTE AVE. IN PAVEMENT.
Measurements:
61.5'S. FROM TMSCORNER OFTOA20ORAV�OEE
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Area:
VD-14 Drop Manhole:
No
Depth:
7.4 MH Material:
PRC
Lid Diam:
i 24 Steps Mat:
ALU
Barrel Diam:
46 Surface Cover:
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Date Installed:
Warranty Expires:
C3:
Project Name:
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Spec Inst:
MH052-BEGINNING MH-8" GOING W.
8" STUB FROM S. AND 1 SERVICE FROM 2105 LAPORTE AVE.
Pipes In And Out
In/Out Type Diam Lgth
(OUT To: ww14583 VCP 8 290.7
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VERT SCALE 1" = 5'
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— `STOR RAIN LINE PROFILE
HORN SCALE 1" = 20'
VER SCALE 1" = 5'
021
THERE /S A SILT FENCE AL
THE FAST .5wE OF LOTS 1 & .
AS SHOWN ON THIS SHEET.
THERE 15 NO DETENTION RE
DEVELOPMENT
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SECTION
GENERA. AS NOTES .
1. REMOVE
SEDIMENT
ENTYR CAOxEY FACE STORY FFM, O
HASO FflI M xKH ONE DIME T TO L B ER DEPTH
POSFR U
IN SERE TRUJ REM WED SEDIMENT S SAN BE OEPoSIIEO 2 _�
IN N1 Ma iRISUIMY l0 . SEGMENT RESIN OR OMW
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I. SEDIMENT µD GTOWEL SIMLL BE IMMECMIELY REMTm 4 Cyq
FROW MWELED WRY OF BOARDS. o
EROSION CONTROL CURB INLET GRAVEL nLTER i= T3i
artMRFam CglM STORM SEWER 'y°'c� MAIL
NINE rzRDRAFT CONSTRUCTION DETAILS ovC 6
City of Fort Collins, Colorado = IS
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