HomeMy WebLinkAboutDrainage Reports - 01/02/1997PROPERTY OF
FINAL DRAINAGE AND
EROSION CONTROL REPORT
FOR
TROUTMAN OFFICE PARK P.U.D.
FORT COLLINS, COLORADO
PREPARED FOR:
TROUTMAN OFFICE PARK ASSOC., LLC
FORT COLLINS, COLORADO 80525
. JULY 19, 1996
REVISED: October 9, 1996
PREPARED BY:
PARSONS & ASSOCIATES
CONSULTING ENGINEERS
432 LINK LANE PLAZA
FORT COLLINS, COLORADO 80524
(970) 221-2400
PROJECT NUMBER: 96.10 TOP
,
PARSONS &
a ASSOCIATES, INC.
CONSULTING ENGINEERS
September 421996
' Mr. Glen Schlueter
' Fort Collins Stormwater Utility
235 Matthews
P.O. Box 580
' Fort Collins, CO 80522
' RE: Resubmittal of Final Drainage and Erosion Control for Parkway Townhomes,
Dear Glen:
P.U.D.
- This drainage and erosion control report has been prepared to provide final design
information for the proposed 18,400 sq. ft. commercial office building at the northwesterly corner of
Troutman Parkway and JFK Parkway, Fort Collins, Colorado. The parcel has been identified by plat
as "Superblock Holding" and was reviewed and approved thru preliminary P.U.D. with Marketplace
P.U.D. in 1989.
.' This report was prepared in conformance with the City of Ft. Collins Storm Drainage and
' Construction Standards and with conformance to "Mail Creek and McClellands Major Drainageway
Plan: by Cornell Consulting Company, December, 1980.
' Sincerely,
PARSONS &
' Gary A- Odehl
Project Engineer
tGAO/sw
Enclosure
432 Link lane Plaza • Ft. Collins, Colorado _ 80524 • 19701 221-2400
TABLE OF CONTENTS
I. INTRODUCTION 1
II. SITE DESCRIPTION 1,2
III. HISTORIC/MASTER DRAINAGE 2,3
IV. DRAINAGE CRITERIA 4
V. DRAINAGE UNDER DEVELOPED CONDITIONS 5,6
VI. EROSION CONTROL 7
EXHIBIT 1 VICINITY MAP
APPENDIX A
DEVELOPED DRAINAGE CALCULATIONS
APPENDIX B
DRAINAGE REPORTS OF RECORD
APPENDIX C
EROSION CONTROL -CALCULATIONS
BACK POCKET
EXHIBIT 2
FINAL DRAINAGE AND
EROSION CONTROL REPORT
'
FOR
TROUTMAN OFFICE PARK P.U.D.
' I. INTRODUCTION:
This drainage and erosion control report has been prepared to provide final design information for the
' proposed 18,400 sq. ft. commercial office building at the northwesterly comer of Troutman Parkway and JFK
' Parkway, Fort Collins, Colorado. The parcel has been identified by plat as "Superblock Holding" and was
reviewed and approved thru preliminary P.U.D. with the Marketplace P.U.D. in 1989.
' This report was prepared in conformance with the City of Ft.Collins Storm Drainage and Construction
Standards and with conformance to "Mail Creek and McClellands Major Drainageway Plan: by Cornell
tConsulting Company, December, 1980.
1 IL SITE DESCRIPTION•
Troutman Office Park P.U.D. is more specifically identified as a parcel of land situated in the southwest
quarter of Section 36, Township 7 North, Range 69 west of the 6th Principal Meridian, City of Fort Collins,
' Larimer County, Colorado. The site is bounded on the north and west by the fully developed Marketplace
P.U.D. and on the south by Troutman Parkway and east by JFK Parkway. Please refer to Figure 1 for a Vicinity
tMap of the area.
-1-
L
PROJECT SITE
VICINITY MAP
1 " = 1400'
FIGURE 1
The total proposed development contains approximately 0.82 acres. The site is currently vacant and contains
natve grasses and a large cottonwood tree that will be saved as part of the development. The existing site has
relatively shallow slopes (approximately 2%) that drain to an open 8" PVC pipe outfall at the southwesterly ner
of the site.
III ..HISTORIC/MASTER DRAINAGE:
Troutman Office Park is located in the McClelland Drainage Basin. As detailed in the previous section,
the approved Drainage Master Plan was prepared in 1980. This study identifies the master basin as Area 10 or
Reach 6D and describes the basin as fully developed and connected by ponds and existing manmade conveyance
elements.
The Basin upstream of Larimer No. 2 will drain to the canal per the "Final Drainage Report for the Heart
Special Improvement District" January, 1985 by EPI. This report allowed for a 2 year Historic release to
Larimer No.2 of 0.867 cfs/acre. The capacity of the Larimer No. 2 was established in the "Fort Collins Retail
Center P.U.D. Final Drainage Report" by RBD Inc., September, 1985. This report details a total discharge of
240 cfs which is comprised of 155 cfs in irrigation flows and 85 cfs in stormwater flows. The Canal currently is
concrete lined along the western edge of the Pioneer Mobile Home Park and is conveyed under Harmony Road in
a Yx 9' CBC.
The proposed site was included as part of "The Market Place P.U.D." Final Drainage Report by Parsons
& Associates January, 1990. The Market Place Study divided the developed area into approximately 6 sub -
basins that provided individual on -site detention and routing of accumulated spills to a sub -surface conveyance
system.
-2-
I
The existing system spills all combined flows to the Larimer No.2 per the design release rate of 0.87 cfs/acre.
The text and all calculations sections of the approved Market Place study are available in Appendix B of this
report.
The outparcel or "Superblock Holding", as identified in the Market Place Study, was designed with an
outfall to a shallow manhole at the southwesterly comer of the tract (Manhole ME A-6). The outfall system has
adequate excess capacity to spill controlled releases from the proposed site, per allowance from calculations that
are included in the Market Place Study.
-3-
IV. DRAINAGE CRITERIA:
Run-off from each of the site sub -basins was determined by the Rational Method, a widely accepted
predictor of run-off from basins less than 200 acres. Flow capacities for swales, gutters, and open channels
were determined using the Mannings Equation. All run-off coefficients and Mannings "n" were determined by
tables and figures in "Fort Collins Stone Drainage Design Criteria Manual' and conforms to "Urban Drainage
and Flood Control Manual' (UDFCM). Detention storage requirements were determined by the "FAA Method"
tables as outlined in the UDFCM.
-4-
' V. DEVELOPED DRAINAGE CONDITIONS
For the following discussion, please refer to the Drainage and Erosion Control Plan in the back pocket of
' this report. As outlined above, the proposed lot is part of a larger, overall drainage plan that was detailed by the
' Market Place P.U.D. drainage report. Portions of the developed site will drain to existing detention ponds (A-5
and B-1) and release per design rates, as detailed in the Market Place P.U.D. drainage report.
' Basin B-1
This existing sub -basin was originally designed to drain to two area inlets in the parking lot and landscaped
' area bordering the north side of the proposed development. This pond was designed to detain 4144 cubic feet of
storage with a release rate of 0.30cfs (per Market Place P.U.D.). The design outfall rate of 0.30 cfs was used to
calculate a revised storage volume of 3074 cubic feet, well below available storage of 4144 cubic feet, refer to
' Appendix A for detention pond calculations.
' -5-
Basin A-5
This existing sub -basin was designed to drain to two area inlets in parking lots at the rear of the existing
building pads, directly west and adjacent to the proposed development. The pond was designed to detain 4324
cubic feet of storage at a release rate of 2.38 cfs. (per Market Place P.U.D.). The design outfall rate of 2.38 cfs
was used to calculate a revised storage volume of 5177cubic feet. This volume represents a shortfall of
approximately 850 cubic feet which will be transferred to Sub -basin A-6, which has adequate storage available.
Basin A-6
Sub -basin A-6 is the remaining parcel that represents the proposed development area. All roof and
driveway flows will spill to a low point at the southeasterly comer of the developed lot. This point drains to a
small inlet box and orifice plate that represents a controlled release to a 15" RCP pipe and westerly to the
existing 5' Type "R" Wet in the north flow -line of Troutman Parkway. The detention pond has a total storage
volume of 4675 cubic feet, only 3562 cubic feet is required. The additional volume will be used to mitigate the
storage shortfall from Sub -basin A-5. Excess spills will flow east along the entrance drive to the pond surface.
Please refer to Appendix A for detailed summaries of Developed Basin Flows, detention pond calculations and
composite "C" calculations.
I
' VI. EROSION CONTROL:
1 "
Wind Erosion:
1
' This site is located in an area designated as having moderate wind erosion potential. The anticipated
construction will require disturbance of all natural features. Erosion control will be carefully planned in areas of
' construction, structural measures will be used to mitigate wind erosion during construction. Areas disturbed will
require the installation of silt fencing and gravel mulch or black base pavement will most likely work for on -site
stabilization during construction of building pads.
Water Erosion:
1
' This site is located in an area of moderate to high potential for erosion due to storm run-off. Therefore,
emphasis will be placed on control of water erosion damage. Silt fencing, straw bales and pavement/foundation
' paving and timing of construction will be carefully co-ordinated to minimize exposed surfaces for more than two
' months. The finished site will be largely covered by hard surface, providing adequate stabilization. The on -site
slopes are very flat, erosion from embankments should not be a major consideration.
-7-
APPENDIX A
DEVELOPED DRAINAGE CALCULATIONS
TROUTMAN OFFICE PARK P.U.D.
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DETENTION VOLUME REQUIREMENTS
Page:
100 Year Event
y of 9 Pages
Project Number:
Project Title:
Date:
96.10TOP
TROUTMAN OFFICE PUD OFF -SITE
POND B-1 SIZING
08-Oct-96
Estimator: G.A.ODEHNAL
File: TOPDETB1.W01
Problem:
Determine the total volume of detention required for the proposed development
which consists of approximately 0.58 acres. All off -site basins will provide
their own detention storage and release only the Approved 0 per the MASTER PLAN.
Given:
a) Fully developed conditions
b) The historic 100 year release = 0.3 cis AT APPROVED RELEASE
c) Basins Included: All BASINS - WEST OF LARIMER NO. 2
d) Mass Diagram Method of Detention Calculation
Composite'C' PER URBAN DRAINAGE MANUAL
COMMERCIAL CCf = (0.62)(1.25)= 0.775
CCfA= (0.775)(0.58) 0.449
Time:
100 yr. freq.
Time: Acumulated Outfall Volume: Storage Required:
min.
CCfA
Inten.
seconds Vol. (ft-3) 0 = 0.3 cfs ft -3 Ac-Ft
5
0.45
8.98
300 1,210 90 1,120 0.0257
10
0.45
6.97
600 1,878 180 1,698 0.0390
15
0.45
5.95
900 2,404 270 2,134 0.0490
20
0.45
5.23
1200 2,818 360 2,458 0.0564
30
0.45
4.06
1800 3,281 540 2,741 0.0629
40
0.45
3.44
2400 3,707 720 2,987 0.0686
50
0.45
2.95
3000 3,974 900 3,074 0.0706
60
0.45
2.57
3600 4,154 1,080 3,074 0.0706
90
0.45
1.92
5400 4,655 1,620 3,035 0.0697
120
0.45
1.47
7200 4,752 2,160 2,592 0.0595
150
0.45
1.20
9000 4,849 2,700 2,149 1 0.0493
Maximum Volume Required: 3,074 ft-3 or
0.0706 Ac.-Ft.
USE 0.07 Ac - Ft
DETENTION VOLUME REQUIREMENTS
Page:
100 Year Event
5 of Q Pages
Project Number:
Project Title:
Date:
96.10TOP
TROUTMAN OFFICE PUD OFF -SITE
POND A-5 SIZING
03Sep-96
Estimator: G.A. ODEHNAL
File: TOPDETA5.WO1
Problem:
Determine the total volume of detention required for the proposed development
which consists of approximately 1.28 acres. All off -site basins will provide
their own detention storage and release only the Approved O per the MASTER PLAN.
Given:
a) Fully developed conditions
b) The historic 100 year release = 2.38 cfs AT APPROVED RELEASE
c) Basins Included: All BASINS - WEST OF LARIMER NO. 2
d) Mass Diagram Method of Detention Calculation
Composite'C' PER URBAN DRAINAGE MANUAL
COMMERCIAL CCf = (0.85)(1.25)= 1.00
CCfA= (1.00)(1.28)= 1.28
Time:
100 yr. freq.
Time: Acumulated Outfall Volume: Storage Required:
min.
CCfA
Inten.
seconds Vol. (ft^3) O = 2.38 cfs ft ^3 Ac-Ft
5
1.28
8.98
300 3,448 714 2.734 0.0628
10
1.28
6.97
600 5,353 1,428 3,925 0.0901
15
1.28
5.95
900 6,854 2,142 4,712 0.1082
20
1.28
5.23
1200 8,033 2,856 5,177 0.1189
30
1.28
4.06
1800 9,354 4,284 5,070 0.1164
40
1.28
3.44
2400 10,568 5,712 4,856 0.1115
50
1.28
2.95
3000 11,328 7,140 4,188 0.0961
60
1.28
2.57
3600 11,843 8,568 3,275 0.0752
90
1.28
1.92
5400 13,271 12,852 419 0.0096
120
1.28
1.47
7200 13,548 17,136 (3,588) -0.0824
150
1.28
1.20
9000 13,824 1 21,420 (7,596) -0.1744
Maximum Volume Required: 5.177 ft^3 or
0.1189 Ac.-Ft.
USE 0.12 Ac - Ft
DETENTION VOLUME REQUIREMENTS
Page:
100 Year Event
G
/ of 9 Pages
Project
Number:
Project Title:
Date:
96.10TOP
TROUTMAN OFFICE PUD ON -SITE
POND A-6 SIZING
08-Oct-96
Estimator: G.A. ODEHNAL
Filer TOPDETA6.W01
Problem:
Determine the total volume of detention required for the proposed development
which consists of approximately 0.79 acres. All off -site basins will provide
their own detention storage and release only the Approved O per the MASTER PLAN.
Given:
a) Fully developed conditions
b) The historic 100 year release = 0.69 cfs (AT 0.87 cfs / ACRE)
c) Basins Included: All BASINS - WEST OF LARIMER NO. 2
d) Mass Diagram Method of Detention Calculation
Composite'C' PER URBAN DRAINAGE MANUAL
COMMERCIAL COf = (0.64)(1.25)= 0.80
CCfA = (0.80)(0.79)= 0.632
Time:
100 yr.
freq.
Time: Acumulated Outfall Volume: Storage Required:
min.
CCfA
Inten,
seconds Vol. (ft^3) O = 0.69 cfs ft ^3 Ac-Ft
5
0.63
8.98
300 1,703 207 1,496 0.0343
10
0.63
6.97
600 2,643 414 2,229 0.0512
15
0.63
5.95
900 3,384 621 2,763 0.0634
20
0.63
5.23
1200 3,966 828 3,138 0.0720
30
0.63
4.06
1800 4,619 1,242 3,377 0.0775
40
0.63
3.44
2400 5,218 1,656 3,562 0.0818
50
0.63
2.95
3000 5,593 2,070 3,523 0.0809
60
0.63
2.57
3600 5,847 2,484 3,363 0.0772
90
0.63
1.92
5400 6,553 3,726 2,827 0.0649
120
0.63
1.47
7200 6,689 4,968 1,721 0.0395
150
0.63
1.20
9000 6,826 6,210 616 0.0141
Maximum Volume Required : 3,562 ft^3 or
_
0.0818 Ac.-Ft.
USE 0.08 Ac - Ft
POND VOLUME 03-Sep-96
JOB: POND A-6 DEVELOPED CONDITION
CONTOUR
CONTOUR
VOLUME
TOTAL
ELEVATION
AREA
PER INCR.
AT ELEV
5024
169.39 SF
858.00
858.00
5025
1,546.61 SF
2,189.00
3,047.00
5026
2,831.39 SF
1,628.35-
4,675.35
5026.5
3,682.01 SF
0.00
4,675.35
0
0.00 SF
0.00
4,675.35
0
SF
0.00
4,675.35
0
SF
0.00
4,675.35
0
SF
AREA REQUIRED (AC/FT):
TOTAL ACRE FEET: 0.1073
CUBIC FEET: 4,675.35
/,3 PARSONS &
/r1— ASSOCIATES
CONSULTING ENGINEERS
FL Coae Co6mdo 8057A
CLIENT ' JOB NO. 9(.. I O T 0 G
PROJECTTr021rnAr. Office Park P.V.D. CALCULATIONS FOR OriC;(e Pia'e
MADE BY H J L DATE 71 1119 (O CHECKED % AO
DATE 910519 ` SHEET OF
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PROJECT "VA C'--4n �:i CALCULATIONS FOR 1/47
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CONSULTING ENGINEERS
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BV OA CHECKED -DATE -SHEET
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1
1
1
1
APPENDIX B
0
DRAINAGE REPORTS OF RECORD
TROUTMAN OFFICE PARK P.U.D.
I
1
FINAL DRAINAGE REPORT
FOR
THE MARKET PLACE
LOCATED AT
SOUTH COLLEGE AVENUE & TROUTMAN PARKWAY
FORT COLLINS, COLORADO
TO BE DEVELOPED BY:
ROSENBAUM/DEAN
COLORADO SPRINGS, COLORADO
MAY 5, 1989
PREPARED BY: PARSONS & ASSOCIATES
432 Link Lane Plaza
Fort Collins, CO 80524
(303) 221-2400
PROJECT NO. 89.07 ROS
1
TABLE OF CONTENTS
COVER LETTER
INTRODUCTION
SITE DESCRIPTION
HISTORIC DRAINAGE
MASTER DRAINAGE
DRAINAGE UNDER DEVELOPED CONDITIONS
CONCLUSIONS AND RECOMMENDATIONS
VICINITY MAP
CALCULATIONS
ENCLOSURE:
GRADING AND DRAINAGE PLAN
FINAL DRAINAGE REPORT
FOR THE MARKET PLACE
FORT COLLINS, COLORADO
INTRODUCTION
This drainage investigation has been performed for the
purpose of providing design information for the development of a
proposed commercial shopping center to be located at the Northeast
corner of the intersection of South College Avenue and Troutman
Parkway, Fort Collins, Colorado. The City of Fort Collins "Storm
Drainage Design Criteria and Construction Standards" was used as a
basis for guidelines and criteria throughout this investigation.
SITE DESCRIPTION
The study area is situated in the Southwest Quarter of
Section 36, Township 7 North, Range 69 West of the 6th Principal
Meridian, City of Fort Collins, Larimer County, Colorado. The
site is bounded by: South College Avenue on the West; the
Fountainhead P.U.D. on the North; the JFK Parkway on the East; and
Troutman Parkway on the South. A small parcel of land located at
the Northwest corner of JFK Parkway and Troutman Parkway, known as
Superblock Holding, is excluded from this development. This phase
of development contains approximately 8 acres. The area is
presently undeveloped and used for three residential acreages with
the major portion of the property being vacant. The topography of
the site slopes from Northwest to Southeast at grades varying from
0.5% to 2%. The site is predominantly covered with grasses and
native vegetation.
' HISTORIC DRAINAGE
Prior to the construction of the streets bounding the site on
' the east and south, the Larimer No. 2 Canal formed the easterly
boundary of these lands. The No. 2 Canal was reconstructed and
relocated as a part of the Heart Special Improvement District.
' Prior to this construction the area drained into the No. 2 Canal.
The Heart Special Improvement District installed storm drainage
pipes onto the properties at the intersection of Troutman Parkway
and JFK Parkway. The construction was performed in accordance
with an agreement between the City of Fort Collins and the Larimer
County Canal No. 2 Irrigation Company whereby the Ditch Company
allowed the City to discharge stormwater into the No. 2 Canal.
MASTER DRAINAGE
The site has been considered in several previous drainage
studies in this area. The "McClelland's Mail Creek" Basin is the
' City's designated master plan basin in which this site is located.
The site has not been studied to any detail within this Basin
Master Plan. An investigation for the area to the North and East
was prepared by Cornell Consulting Company. This report was
the
'
"Master Storm Drainage Report for the Landings P.U.D.".
It
was
recommended in this report that the area above the No.
2 Canal
be
allowed to develop and detain stormwater on -site and
run-off at the 2-year historic rate into the No. 2
to release
canal.
A
subsequent report prepared by Engineering Professionals,
Inc.
for
the Heart Special Improvement District recommends
that
in
conjunction with the reconstruction and relocation of
the No.
2
Canal, as a part of the S.I.D., that the rate of discharge into
the canal be limited to 0.87 cfs/acre. The storm drainage pipes
' that were installed to serve the properties were sized on that
basis.
' Additional runoff that flows onto the site from the adjacent
properties is directed through detention facilities in the
Fountainhead P.U.D. onto the site. The investigation and plan
preparation for facilities that were installed with the
Fountainhead P.U.D. were performed
by Parsons & Associates.
The
release rate for flows from the
detention facilities onto
this
site is 7.6 cfs.
DRAINAGE UNDER DEVELOPED CONDITIONS
'
The site is proposed to be a
retail shopping center
with
perimeter pads for food services and other high traffic uses.
The
site is proposed to be developed in
phases so that the southerly
' 500'+ of the site will be the initial development. The site has
been considered to divide flow into two separate points of
concentration based on the work performed under the Heart S.I.D.
' The most westerly area is Basin A and is considered to have 9.96
acres concentrating at the 18" diameter storm drain pipe located
on the south side of Troutman Parkway approximately 200 feet west
' of JFR Parkway. Of the total 9.96 acres concentrating at this
point 6.81 acres is within Phase 1.
The easterly drainage area, Basin B, is adjacent to JFR
' Parkway and concentrates at an 18" storm drain pipe located on the
east side of JFK Parkway at a point approximately 200 feet north
of Troutman Parkway. An area of 6.81 acres concentrates at this
' point along with the controlled release from the Fountainhead
P.U.D. of 7.6 cfs. Phase I will contain approximately 1.55 acres
in Basin B.
I
' Based upon the criteria established in the Report for the
Heart S.I.D., the area should be allowed to release at a rate of
0.87 cfs/acre. Therefore the maximum flows released from this
area at the concentration points for Basins A & B are 8.67 cfs and
(5.34 + 7.6) 12.94 cfs, respectively. The detention volume
required for Basin A is 44,860 cubic feet to be provided with this
initial phase of development. The detention volume estimated for
' Basin B is 6,350 cubic feet to be provided with this initial
development.
' CONCLUSIONS AND RECOMMENDATIONS
1.) The site is to be developed to retain the general drainage
' pattern existing prior to development.
2.) All final design and construction shall conform with the City
of Fort. Collins "Storm Drainage Design Criteria and
' Construction Standards".
1
fl
11
3.) On -site detention is to be provided with controlled release
rates that meet or exceed established criteria.
4.) The site is not located within an established
floodplain.
floodway or
APPENDIX
I
- ppn� v
0 ....
(PIONEER MOBILE HOME PARK
HARMONY ROAD
MA,C CREEK
%ICI NIT`c' MAP
1
1
1
1
i
1
1
1
1
1
1
1
i
1
1
1
1
i--- m PARSONS &MIEN, R °SS4AA Am RAAA - JOB NO.
�y.p+ �
ASSOCIA TES oS
PROJECT T�A1Q�T PLACE CALCULATIONS FOR F1 N r41 D)OAIN 14-'v
CONSULTING ENGINEERS
FL CoNro. Colorado 8052{ MADE BY.N�. DATE27_ CHECKED BY DATE SHEET —OF
Z3, kA
_21 3
I
g iooyA
�_7
3 s ; S. 3
T-T
A.0a..1
4
V)'n y
S7,zoy
GZ,3/Z
G3;7VZ
1pS,78S
1
i
Ve L,' .;
35,:7-1.j�
I�
;
1 ,
leezU
2Y30
4
I i
EN
PARSONS JOB NO. � -0 4 )eo s
ASSOCL47E& CL,' , 8!
S PROJECT YAkjtg&r Fl-A05 CALCULATIONS FOR FIN41--
CONSULTING ENGINEERS
FLsmu MADE BY DATE-1�—HECKED By— DATE SHEET ------ (,7OF
7 S
5
T r
loll
-not:
-4 CA
T
, -oo. Z. f
3 -8k
7 1
cm4e,,; i/n I#-/- cos .
JL Z.94
--T -T
u/
ex
w%/s"d,:.-e-O..i2% -�
Q _ �,3;�3
> �z...yG /5 yl�w so�� - --'
PARSONS & CLIEN, 4e74SeW9Ajj4rn JOB. F2 0-7 4e
ASSOCIATES PROJECT 7-AJC— 4&4RXECALCULATIONS FOR--,,t1w4e.-
CONSULTING ENGINEERS
Ft. CoMns, Cvkwa& SOS24 k4ADESY—vAinlOATEY--Z2M& CHECKED BY —DATE —SHEET OF dl
PARSONS & AC AA) JOB NO.
M ASSOCIATES PROJECT 2W& ,'V,4)e4<ffr PlAlee CALCULATIONS FOR bil�l 4-
CONSULTING ENGINEERS MADE BY 499M DATEJ-CHECKED BY DATE- SHEET___X_ OF 51
Ft. CoMnm6 CoWrmlo Sam
_AIT
7-T 7
+4
41i
#
r_� 4
L 1-
44
10 if
00 oopoi.4 -il
7
r- ti -to( z t3iz. x LIS
r m
40f
dekso 64io
A 1-4 40� I
dp-
a SD,4 - 2 kt Lie
_42346 075,-
1
1
1
1
APPENDIX C
EROSION CONTROL -CALCULATIONS
RAINFALL PERFORMANCE STANDARD EVALUATION
PROJECT: ��1c� �U{k }�illl� STANDARD FORM A
COMPLETED BY: GA O a xL I RE DATE: 7 % 9
9 3
DEVELOPED
ERODIBILITY
Asb
Lsb
Ssb
Lb
Sb
PS
SUBBA.?IN
ZONE
(ac)
(ft)
($)
(feet)
2.10
3.O
gI .Cp
80.0
n. if>
70
r
J I
ON
�
' MARCH 1991 8-14 DESIGN CRITERIA
1.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
EFFECTIVENESS CALCULATIONS
PROJECT: —� � me n O 1 « G r LA�lj STANDARD FORM B
COMPLETED BY: , 6A nc�-kr.g,) PL DATE: 9C9
Erosion Control C-Factor P-Factor
Method Value Value Comment
tot s�1 WtP�AIk-S ��+ 0-01 1.00
h\i r 1 I42r-5 1_ li0 0.60
Imo"{ C
t _ 0 0 0. '5O
pp
/r� /;�rejvlur 1.00 0- Q I
/
MAJOR
PS
SUB
AREA
BASIN
($)
BASIN
(Ac)
CALCULATIONS
0. "
0.3(
w
D.
0. 0[C.3 1� , Q )
MARCH 1991 8-15 DESIGN CRITERIA
ENGINEER'S COST ESTIMATE
Page:
FINAL
1 OF 1
Project Number:
Project Title:
Date:
9510-TOP
TROUTMAN OFFICE
PARK
22-Jul-96
Estimator: G.A.ODEHNAL
File:
TOPERO.WQ1
Item
#1: ALTERNATE #1
#2:
ALTERNATE #2
Numbe
Description of Item
Upit Cost*
Unit
erosion control as designs
all disturbed areas seeded
Quantity
Item Cost
Quantity
Item Cost
A
EROSION CONTROL
Native Seeding w/ 2 Tons of
Straw Mulch (Crimped)
$650.00
AC
$0.00
0.81
$526.50
Inlet Filters
$75.00
EA
2
$150.00
$0.00
Silt Fence
$2.50
LF
460
$1.150.00
$0.00
ISUBTOTALI
$1,300.00
$526.50
MULTIPUER
1.5
1.5
TOTAL DEPOSIT
$1,950.00
$789.75
TOTAL SECURITY REQ'D.
$1,950.00
Unit costs are installed costs.
(CAGE I- so-
0 rT }a 6D
b @Ei //t" RE94R pek S. 17497 Clark
o FOr/NO EP/Sryk MONOMENr
Al a0.(NEP
SECTro 36,
TI4•RHM rO r?PE9IP w/J
EEv o to Adcgl N
EA9r OF reuE QN
0
a
CC I
� Nd`'S1'69'E
1¢ •'
°o
WESTa INE 5u. V
Se6rl N 36,
J)N, 969N -�
iN LMNEF
$E6TION 56.
T1N,R69N
4�e 3
Ilk w.
/O r/S"REBA4 W
4 ea -NON•r ( A
Or rebE COPN6P
within
III
"IfIrIvez"36"W
59 r
i
V \
y�
0 p R
in k
cp1Yz' P PECEP w/J S:E weer mot; CRT
era'N4RTre E a 79 0M pOT � C. <
IIIar rn.E c4PNEP 0 5, 4 * eP @G L\
m0 5 '( r) . 0 0-
N U /5.UTIOTY -M� 4- l ��
Omwn '� Q.3N 30t0409E
2949.
mm ' ' f
en - a1•ga'pW
M N.>_.
/e eo uR P Nr OP _ `-
aq'We i r bE4lNaviN4 _ - M
�Qoi-r ANNO d6ul t: G9
%„ °° vXwrv:
S b ..
N
oe j1 VI JI -1 ...: _NGY• CeRTIP1UT8
_ Called1 M1eC Y II I total IY9
I• > 5 � `WPrren Lake mma. n9-9fn 1 F p
bb,,�� \ Utah,, the _.. .y 1 ¢ � 1 I Y Cl.
,1.: , lalligir that Oil L• aer <9
'[ 9 TE[' �"\'y \� °..• a.Y q !x be apvagroa by 1 I a till title in.Jv. ^pert �"
R 1 ✓' i Jn 1u t' above a 1 I. ' yd LbIL file
a :n O�P.R Iy�). n i) IO� Chat
rm vi'•E� \b F [e°v \ 'y�px44�yS \rR M nv ¢ lu II 11 F ]Y 1.+-, ur ✓• ae cl Said aa,o
y izf �ftl`80525�,I^,d'4
b`
`• J calling code, n 1 1 I
E(�urjr�.'�a}.
�LJ Q J ^ •Y,� WII15 L 11 I
p 'I :I . Adarae
U IBY eErr_ ,,,eye J' hot uo, v:
"safe OobI a ei vp —_
) IIp1Y1'' i h •muxr Y u vnr a All' 1 r! r 1. 1 n r. f.
5 •r 1) ) CITY exel ¢¢MIg9 Xe9le[ntLan Mv.: ____
g j �vevoR•s srsr Approved by the c�y�ea�r9u �t [ne City of foot ouln,.
E Y.:. _9 it T� M Colorado. nn toe; •.11.. Iv__
Wallace C.AXua vtt. a July registered in [ J=1
VICINITY MdP \ �a! e�mr.ary'ro:o[iaaoe reoor[+ m till, �,�Yiq�` 1 e °: 9mpn,
[1r n e It � ee a [yh y7.i%1+�4r -�� v
NTS. r4er Y 1 CA
Xa��S } 4
c��rW Land such f 1)IJ p� , lv PC )nG T= noF n
ac PeVipl [a[ion Nc..< 1]a9]
qJ u Lill Pl+ppl[V DillItIr If in' haY r.l F roi racy, Ii of 9�:[ _ .L.rl`9 �"Ey iII
.r a
.. �• — + r6FlarIu:in` Yl rt'clor - -Go -
e
lkiis or 111
n 1
PLAT OF
SUPER BLOCK HOLDING PHASE I
BEING A PLAT OF A PORTION OF THE SOUTHWEST
QUARTER OF SECTION 36, TOWNSHIP 7 NORTH,
RANGE 69 WEST OF THE 6th P.M. CITY OF FORT
COLLINS, COUNTY OF LARIMER, STATE OF COLORAGO Or
TA411. W lark
58 9 I 0 E91C T 9 AND DECLARATION
MW
Of
at
n Ly enppe Dr<sanu! [Mc top undevlvned, LalnD the
wne(lav`and prNrlvt°rp of the [elloxlnq deverlLW Lana. Cv-xl[:
n[ of mJ loutn.l ^vn the Swtn+vnnt ,curter or Sect n
11 tM1< 4tn o
co.ntr.r'cende. LinCity
��9ca.ry anp( eL:e .. emlo-e: ann Yo)p
mprine the x [ line of the loam sn=[Mpn quarter
ion )f pe Lvu ln<u[n o9°01'e l- ¢ut t xltF all
eearmae p<et.mW herein rneu.p [na.to,
<u teas
ac(n9 It aM1e xve[ 9verlar 'Owner <f eeaJ section ]6:
to vino: !< said Men, 1',nry no, th
oath One]'YP tart
IILPPe • vn [Le: •Nn[tn 99v51'S9' [L': ).59 toot to the
[
e[l°( [Ln Mgt line al that
lcoin tract 9l lana
aabe[erlLeJ i ovt Ill] at P4905til t retorts
n[Jp <t[na Clerk
SeekI Ppat W(' mvi County xltL�the North dpn[-°pry u
of T[ovtvn Dn[kxey,ea deJlcaC[N At Reception N<. 9401 1669
Rape.a. Of the Slid n¢r¢ and v.enmer and to the nu¢ P9 rt
F 0[9IXNIlIC : this auc(IDc10N [npncp along the said
s[n right -Of -way. N<[[n l7034'99• Pne[ 111.64 (epe: [none•
continuing in' Chile Chile right -Of -Illy.
v. . toot along the northwest n,rla9 a central angle ei
a sico-oo �cea w moot 10.00 fact. the long tenure of the
Sold c=rro n,:::, xn[tn 10004-09• Last 19.49 toot t the
HuRI 1pn[-of-ulq of J.P.N. Parkway. ep JrJ lcatN atthe
Laid Receptionn 6601 2669:"Inc,ne pl°ng the gold West
r l:)ne-el-w Y. North 17015'S1• Welt I)L.L) [vet to the 6w[n
IlM Of that cc[[aln tract of IsnJ an Jee[Plavd in 9o<k 11e9
1 P°9151 Ppc<•tle e!M wiJ Cle(1: and R <p [npncr
.�_ lots the vela ^°utn lino North 95021•1e• M Ls^. ;9 be[
[ lino of the tract epo[.mw 11 non a
�+gossi�r.n�� avnq the said ee t ono mmxlrnF rw
lei [ Jntenee. iv Ro:ran Lsnsi -:aX- West l9aal(
e vpt�uiasaven nn15•(3- West eL.n [ant:<g1 son[n
11 %]•S9` xna ee.o]! In se:an 1e032111• caa 4!1.94 fop[ to
straits
coon lvmv o.uLs at=<= ,to or Ip.e Mre np..a the eemn to L.
[.ev=a.na .marvld•e Into lots. race., xa +[(•[ <. = been
�"tnnNlet tons recall e.Plat of Saint tin[knolelnaPhoto (
aii`[mi.a"<ii:is;�aa`::e:ieio:,)nqo:a�aano.ee.nrnra..a
eaa
[ ve. laidop
t and for puL)Ie us*, (vv<[ ne[ae(tvr, the
e ena ee_ant. as are la out foreverna elq:outhis on l. pier.
bondJohnson
s
tripled:
al
EF
X I[nene
And veely this day If
� f B .
6 P A BLLC 9I{\LLJ+_lyq
9 '�f�.. •Z ._ Aar Mar.a9tr] Vuu[m
eT wlural
all
County t 4(1¢e[
The Allikk for gain] instrument x.. °[know ev a L_t t< o,0 11 R/Ataar
of A.P. 19 qg or n.o
jouri so fig _ iq Ven ui�i[ o (u�- ¢ Holding.
q III a.bpl°n vplteu 0,4/tVI
state I
Cpun[Y 9f CLa[1me[ set
PLAT OF
C
BLOCK 'HOLD/NC, PHASE .I
ENGINEERING
PROFESSIONALS INC.
2000 Velmoni Dr. r-n Collins, CO B05P
wy¢er Aet9mmq
cmo[eao law. coopnea any CAERE
1
\ } )
to
l°n Lupon any
you dust
defect in this survey
JUL 2 2 1996
TABLE L
LOHBEAUCnON sgXquE1Cx
PAM WB'NEYeM m2a PYR P.DA
MEN c
SMEIR11a Fq 1e rE�gLY xgklm BY: GAME GAM_
rroa. MHO KNOW)
pBINHUHN, by nV A. gpvM MWft mo mouO. w�BLe ... MANORA,
UNEI by v, may Er~
YEAR
No
MONTH
EALm mwwcDO
1RP
NO boughiin
r
y
�
I
INFALL Easq CONTROL
TRUCTURAL
tl usint TINS/ BONN
at FIRM SmI
Sanig
Bm 20"umum
fm�Il xmnpnl...
AMnedi/ Cm�rnl. P-Y19
Pnn
.jIsMNN
MMma%A
TM-Masn.e Dm
-n
qMUM/°IonR
TABLE 2
®OSON CONTROL METHODS
SHMETHOD M0.
BRAN BRE D
O-FVALUEVALUEGYMRE
1.0
am
ALL P WNF(E M FRD°LT
DNANL AI TER
oa
GAO
" o n
DIRBR.m AI..,E
(2 S/B:aE,2LUI
ulDanRMm aAm
SEED MIX NALL DISTURBED AREAS)
PHURNDS OF
SUDDEN PIS ES OF HE ADS PEOPENT R%APR
PaDDENT AIEKIWASS 210 A 9.8
WEXATS LRAMA ROME in:e 2%
MINE, HAD
3ME MI EURES UN STES WHEN g5➢XC IVE ALL PROBLEMS UD.
AIRMNITY, SALINITY OR HIM WATER FORT) BY A
TRAINED SPEPAVST.
MULCH NAIL INSTURBED ANE..S)
ONE OR MORE OF ME FO LOMN° MIILg6 SNLL ¢ USEO WHEN A PEREXNAL
DRttAND MASS SPEED MIXTURE_
MULCH U'NDCS 6�H APPLICATION RATE
EITHERq HAY DART w-DEC. 31 2HWS/AOE
/M40 OR PWR) MAR. 15 - MAY 15 3/4 TWS/AQE
EAx4 ROL
M AN THANNE3) MEN w - CEC 31 NOT IPRICABIE
HAY OR nawA MULM
BE SHALL HE FREE 0' NOYWS MEMS AND AT LEAST
°ON ESA °NAIUVS MORE IN IS n-
OF E MARINE WALL 10 Evw SUGGESTED
SE
GRIM M1AAL.. AMN..E.
FERTILIZER REQUIREMENTS GAL I ETUR¢D AREAS)
1, SMS FEPBE EERDUSD ACCORDING To LABORATORY SOL MATURE
AND gDADDN
T, IF AFNEROVED By ITS AIRS A MXIMUM qUp OF EMT COLUNS, IN ABSENCE 0' A L POUNDS OF AVAILABLE IMEN TRANDED
POUNDS OF AVAILABLE PLUS wLL OR APPLIED PER AR
DEVELOPED
DETENTION
PONDS
BASIN NUM8ERS
STORAGE ft
RELEASE 0
(Cf3
"I
aEAPI
1RN19FARFO
A_s
6sA
1m
°s](wE w A-0)
2]0
A-'s
LBT5
x502
O°$hvn A-5)
049
xmA
D
am
DEVELOPED
BASIN
FLOWS
BASIN DESIGNATION
AREA
(AD,
010
(cfs)
CHIT
(cf5)
POINT
BASIN NUMBER
I
A-5
1.20
3.0
ME
2
0-I
on
Is
xs
3
A-5
an
to
°.5
CA -I
III
AT
as
DETENTION PMD A-M
$WIND,'"INA: SpA nb ,
5b0pP pm4Pt C324 X']
mm HMEL SMab It
SON bm.lsaQ 5sT n'3 0 "Y I�
(BID BD.L, A-0) I ,
J 1
I _
\ 1
`11
\I,
\1tl
(\ �• ` \\ L2� YST I'g�eLe
,A
sog�: • swnu, MANY! c xOTA d'] 1
4.144
TAX,torMAIL M502] 30 M W
4.
N$
/ L 71
c
D F.F.=28.60 1)\
MANAGE
EASEUENi
c
G-20.
1
>S
DETENTION HUMIDA-0
0:
-. _. SIvwP IwN.k x502 4-3 - 1
=OXES
o"AM A.025 n'S
C4m.- bn
c ae a,m o.2s.
II
I'
G ,
_ =
CEWCREIE FNG¢YENI FOR MI£i BOX ...
_ _. - 111 GLH, DOE OF DETAIL __
pY> f
WATER ONE
@ISTNL MOUND � _ ___
M mwNo
_ PE
50^t1
no 5 RCP s a.wx E L Ix. NORM IZ. 1:= 10'
WE DETAIL -9 ON
SIR
SERVOE IBM woo RgRog
WATER MUSSING
- - ,0 sM.SEMR
DATOM AEIX smNq(EnsT)
&I
0
NJDvq
MAN pin,
T�DUT"MR PIN
_ 5m.
STORM SEWER PROFILE
'(AAb
RSPIeiDD BY Dale if
MEMENIPARSONS
CIE
&
ASSOCIATES,
482 Link
Pt. Collins,
Lane Plaza
Colorado 80524
CONSULTING ENGINEERS
(BLAB)
221 —2400
.D.
A _.
i�� 96.10—TOP II
sDWIR: 1' _ z
LId
mv.. INV.
MYTH
LEGEND
491 --- - E%ISUNG 1' CONTOUR
4970 PROPOSED CONTOUR
BASIN BOUNDARY
[� A - BARN DESIGNATION
- AREA IN ACRES
° c C - COMPOSITE RUNT
COEFFlOENTS (IW NOR. EEENT)
Qp D . DESIGN POINT DESSGNATION
O CHANNEL NUMBER
p.Tx50 FINISHED III EEVAUON
—M SILT FENCE
IP N T III P N DETAIL SHEET)MRB
(SHADIIJTO
INLET RA
I I I I I I i I 1 I I HIGH WATER LINE
GRAPHIC SCALE
20 0 10 2O w
I I
L wall, BO n.
'ANAN,..
TR 0 U AN OFFICE PARK P. U.D. �7
DRAIN -A & EROSION CONTROL T PLAN �?
9 1S96