HomeMy WebLinkAboutIII (B) Approval and Authorization for Mayor and City Clerk to execute Work Order No. 11 with PEC for the Prairie Lake/Lake Meadow Drainage Basin Study portion of the Stormwater Management Master Plan for a not-to-exceed amount of $93, 605 AGENDA 8-06-96
Ocoee Item III B
O�
c
tt
O
•
0' c000 JAMES W. SHIRA,P.E.
CITY ENGINEER/UTILITIES DIRECTOR
150 N.LAKESHORE DRIVE•OCOEE,FLORIDA 34761
PHONE(407)656-2322 EXT.142•FAX(407)656-7835
MEMORANDUM
DATE: July 16, 1996
TO: The Honorable Mayor and Boa d of City Commissioners
FROM: James W. Shira, P.E.
City Engineer/Utilities irector
SUBJECT: Stormwater Management Master Plan - Work Order No. 11
Prairie Lake/Lake Meadow Drainage Basin Study
Attached is a proposal from PEC for the work involved to complete the Prairie Lake/Lake
Meadow Drainage Basin Study portion of the Master Drainage Plan, as well as a proposed
work order to authorize them to proceed.
Attachment "A", Scope of Services, is a detailed list of the work to be accomplished. PEC
proposes to complete the work involved by December 31, 1996 for a not-to-exceed fee of
$93,605.00.
I recommend that the City Commission approve Work Order No. 11, and authorize the Mayor
and City Clerk to execute Work Order No. 11 for a not-to-exceed fee of$93,605.00.
JWS/jbw
Attachments
`'i
THE PRIDE OF WEST ORANGE
PEC
PROFESSIONAL ENGINEERING CONSULTANTS, INC.
July 17, 1996 P-6103
Mr. James W. Shira, P.E.
City Engineer/Utilities Director
City of Ocoee
150 North Lakeshore Drive
Ocoee, Florida 34761
Re: Master Drainage Plan- Work Order No. 11
Prairie Lake/Lake Meadow Drainage Basin Study
Dear Jim:
Pursuant to our meeting yesterday, please find enclosed four(4) executed copies of the following
documents:
• Work Order for Engineer's Services Agreement;
• Scope of Services (Attachment "A");
• Manhour and Fee Estimate (Attachment "B"); and
• Scope of Surveying Services (Attachment "C").
It is my understanding that this Work Order is scheduled for approval during the August 6, 1996
City Commission Meeting. If you need my attendance to address any comments from the
Commissioners, please let me know.
We appreciate the opportunity to provide our services for this assignment and look forward to our
continued working relationship with you and City staff on this project. If you have any questions
or require additional information, please do not hesitate to contact me directly at 422-8062.
Very truly yours,
PROFESSIONAL ENGINES' . _ ONSULTANTS, INC.
David ". Hamstra, P.E.
Stormwater Department Manager
DWH/bk.P
g:\cler\ld\pro\P-6103
cc: Wanda Horton, City of Ocoee
Ken Hooper, PEC ��� O V � � ,
Walt Phillips, PEC _
File OE-260 (1-1.0)
c
JLC. I T 1996
engineers �
planners ij\
surveyors 200 East Robinson Street • Suite 1560 • Orlando, Florida 32801 • 407/422-8062 • AXIittrIrlreirr
VD er
N 'r N h N 0000
u 44 44 48 44 in
`5 Q
I.F
O M P 00 O
n .- I.-i .-i N 00
.5
W Q
Zr". 8 h 8 88 Q.
H 0 00 a h o
44 44 49 49 'Cr
49 49
10),M C.) N h ON
8 Q.
Qy 1r/ DD 8 8y}�
N M sO O V1 00
O O N N M N N N
49 44 49 44 44 .
0 49
8 8 8 8 8 8
a 1 889 $ $ $
>" c � � 4444 ,-
44
0 ."••. .§
y $ . 8 8 8 8 8 8 v
4 .5 I g ter g 02. g opo g
iWd N �T N
07 cg 44 N 0
49 44 44 >`
�
1 8N883 � �
I
N N .-I N Ce) 5 1
W 1 w 00 vp .-7 N U h I.
44 44 CO 44
Ag nA4
II
0 iUj
03 t
0 .., ... 1 I g
Z ag t
•
AgN
a
Ti
° kTA
s
A M111
0 „ 3 - � 1
a.
v0 0 a t3 2
3 �
...S4 I-. In 00 M .~-i N
8 z z z z z 0
WORK ORDER FOR
ENGINEER'S SERVICES AGREEMENT
WORK ORDER NO. 11
PROJECT: Master Drainage Plan (Prairie Lake/Lake Meadow Drainage Basin
Study)
ENGINEER: Professional Engineering Consultants, Inc.
Execution of the Work Order No. 11 shall serve as authorization of ENGINEER to provide
professional engineering services as described in Attachment "A" which is attached hereto and
made a part hereof.
ENGINEER shall provide said service pursuant to Work Order No. 11, its attachment and that
certain Agreement of June 2, 1992 between CITY and ENGINEER which is incorporated herein
by reference as if it had been set out in its entirety. Whenever the Work Order conflicts with said
Agreement, the Agreement shall prevail.
TIME FOR COMPLETION: The work authorized by this Work Order shall be completed by
Friday, December 31, 1996.
COMPENSATION: The CITY shall compensate the ENGINEER a negotiated fixed fee in the
amount of Nintey One Thousand Six Hundred Five Dollars and no/100 ($91,605.00) for the
professional services required under this Work Order. An additional amount, not to exceed Two
Thousand Dollars and no/100($2,000.00)shall be paid as direct reimbursable charges for copying
and reproduction expenses. Engineer shall perform all work required by this Work Order; but,
in no event shall ENGINEER be paid more than the fixed fee set forth above without
authorization of the CITY.
IN WITNESS WHEREOF, the parties hereto have made and executed this Work Order on this
6th day of August, 1996 for the purpose stated herein.
ATTEST: PROFESSI s AL : GINEERING CONSULTANTS,INC.
a.
By:
D. is/ • . '� i'te, Vice President
/
Date: 7 / 7 /9
ATTEST: BOARD OF CITY COMMISSIONERS
CITY OF OCOEE, FLORIDA
By:
S. Scott Vandergrift, Mayor
Date:
For the use and reliance
of City of Ocoee only.
Approved as to form and
legality this
day of , 1996.
City Attorney
ii
ATTACHMENT "A"
SCOPE OF SERVICES
WORK ORDER NO. 11
PRAIRIE LAKE/LAKE MEADOW DRAINAGE BASIN STUDY
INTRODUCTION
The Prairie Lake/Lake Meadow Drainage Basins are identified as Basins "03" and "02",
respectively, within the City of Ocoee's Comprehensive Plan (Drainage Sub-Element). Basins
"03" and "02" comprise approximately 1,890 acres, or roughly 3.0 square miles, of northeast
Ocoee and unincorporated areas of Orange County within Sections 3-5 and 8-10 of Township 22
South, Range 28 East. Of the total drainage area, Basin "02" comprises approximately 1,200
acres, while Basin "03" comprises approximately 690 acres.
Basin "02" is bounded on the west by Adair Street; on the south by Wurst Road and A.D. Mims
Road; on the east by Clarke Road; and on the north by Clarcona-Ocoee Road. The primary
drainage conveyance within Basin "02" associated with the developed areas is a system of storm
sewers and roadside ditches which convey stormwater runoff to Lake Meadow. Basin "03" is
bounded on the west by Clarke Road; on the south by A.D. Mims Road; on the east by Ocoee-
Vineland Road; and on the north by Sawmill Subdivision. The primary drainage conveyance
within Basin "03" associated with the developed areas is also a system of storm sewers and
roadside ditches which convey stormwater runoff to Prairie Lake. Both Prairie Lake and Lake
Meadow are classified as landlocked basins, with no outfall. The lakes become one (1) water
body during extreme storm events. Refer to the attached figure for the general location of Basins
"02" and "03" relative to the City of Ocoee and Orange County geographies.
OBJECTIVE
The purpose of this project is threefold. First to establish an updated 100-year flood stage in
order to regulate new development (e.g., Prairie Lakes P.U.D.) consistent with FEMA's
guidelines as published in a report entitled "Managing Floodplain Development in Approximate
Zone A Areas - A Guide for Obtaining and Developing Base (100-year) Flood Elevations"
(FEMA 265/July 1995). The 100-year flood stage will be analyzed based on a single storm event
and on an annual basis to determine the critical event. Second, to evaluate impacts associated
with existing stormwater ponds built in the flood plain (e.g., Forest Oaks Subdivision). Finally,
to address the water quality of Prairie Lake and Lake Meadow since the majority of the existing
development within the Lake Meadow Basin provides no treatment of stormwater runoff and/or
the existing stormwater ponds do not perform as designed (e.g., Clarke Road - Section "D",
Amber Ridge Subdivision).
•
1 P-6103
This study will entail the analysis of the existing drainage system and identification of problem
areas with respect to level of service, water quality impacts, and historical flooding conditions.
This study will also involve the design of stormwater management improvements within the
Prairie Lake/Lake Meadow basin to improve the quality of the receiving water bodies.
The Prairie Lake/Lake Meadow Drainage Basin Study will address the following objectives:
1. To develop an inventory of the existing stormwater drainage facilities, delineate the overall
watershed and drainage sub-basins, and identify other related hydrologic parameters;
2. To evaluate existing and proposed stormwater drainage systems and identify problem areas
and deficiencies;
3. To establish a level of service criteria for each basin and determine the adequacy of the
various hydraulic components of the stormwater drainage system;
4. To develop and apply a stormwater management computer model capable of simulating
stormwater runoff under existing land use conditions within the drainage basin;
5. To evaluate alternative management plans to meet the established service levels based on
any deficiencies identified through data collection and modeling;
6. To generate a Master Drainage Plan based on the recommended improvements and the
estimated construction costs; and
7. To develop a Capital Improvement Program based on system requirements identified in
the Master Drainage Plan.
The following scope will outline the steps required to complete Work Order No. 11 and meet the
aforementioned objectives.
I. DATA COLLECTION
The Engineer shall review all pertinent data as it relates to the Prairie Lake/Lake Meadow
Drainage Basin. The Engineer shall perform the following tasks:
a. The Engineer will obtain and review the following information:
• Flood Insurance Study - Orange County, Florida, Unincorporated Areas, prepared
by the U.S. Army Corps of Engineers, Jacksonville District, dated December
1989;
• Construction Plans and Drainage Calculations for the Forest Oaks Subdivision,
Clarke Road - Section "D", Amber Ridge Subdivision, Sawmill Subdivision,
Carriage Oaks Subdivision, and the Prairie Lakes Planned Development; and
•
2 P-6103
• St. Johns River Water Management District and Orange County aerial topographic
maps.
At the conclusion of the data review, the Engineer shall perform sufficient site inspections
to identify existing stormwater facilities (i.e., drainage ditches, inlets, storm sewer
collection systems), existing land use, drainage patterns and drainage sub-basin
boundaries.
b. Based on existing and proposed developments, site inspections, and existing SJRWMD and
Orange County topographic maps, the Engineer shall delineate the drainage basin and sub-
basin boundaries. Based on further investigation of the Prairie Lake/Lake.Meadow
Drainage Basin, the overall basin boundary may change and will be incorporated in the
AutoCAD layer created during Work Order No. 2. The Engineer shall also delineate the
existing storm sewer collection systems from review of existing construction plans and site
inspections.
c. The Engineer will coordinate with a survey subconsultant to perform the following
services (refer to Attachment "C"):
• Perform a bench level run within the 3 square mile basin;
• Survey the water levels for Lake Hackney, Prairie Lake, and Lake Meadow and
install staff gages;
• Survey control structures for existing stormwater ponds; and
• Survey culverts under Ocoee-Clarcona Road, A.D. Mims Road, Clarke Road,
Florida Central Railroad, and Apopka-Vineland Road.
d. The Engineer shall establish existing land use characteristics based on 1994 Orange
County aerial maps, FDOT land use classification, and site inspections.
e. The Engineer shall delineate conservation areas and/or wetlands based on review of recent
aerials, construction plans, hydric soils and the adopted Land Use Maps.
f. The Engineer shall review the SCS soil layer, provided by Orange County, and created
during the digital mapping phase and assign attributes describing the hydrologic soil
groups (e.g., A, B, B/D) within the Prairie Lake/Lake Meadow Drainage Basin.
g. The Engineer shall utilize a computer program entitled "VALENCE" to electronically
compute the drainage areas and weighted runoff curve numbers for each sub-basin based
on the above referenced AutoCAD layers.
3 P-6103
II. EXISTING CONDITIONS
The Engineer shall analyze the Prairie Lake/Lake Meadow Drainage Basin under existing
conditions and identify system deficiencies based on the adopted level of service (LOS) with
respect to peak flood stages, flow rates, duration of flooding, and water quality issues. The
Engineer shall perform the following tasks to complete this phase:
a. The Engineer shall establish existing basin characteristics for each drainage subbasin which
includes the following parameters: drainage subbasin area (acres), weighted runoff curve
number (CN), time of concentration (Tc, minutes), and peak rate factor.
b. The Engineer shall prepare a stormwater model of the existing stormwater facilities in
order to perform a single event simulation(e.g., 25-year, 24-hour). A computer program
entitled "Advanced Interconnected Channel and Pond Routing Model (adICPR, Version
2.0)" will be utilized to analyze the existing system. The Engineer shall create the input
files needed to model existing stormwater ponds, lakes, drainage ditches, structures, and
cross-culverts.
c. Based on the existing basin characteristics and computer model, the Engineer shall analyze
the existing stormwater facilities under various rainfall events. The Engineer shall select
three (3) design storm events that are consistent with the Land Development Codes and
Comprehensive Plan in order to establish peak flood stages and address existing levels of
service. It is anticipated that the selected storm events shall be the 10-, 25-, and 100-year,
24-hour storm events.
d. Based on the results of the computer modeling, the Engineer shall identify possible
deficiencies under existing conditions based on the recommended basin level of service.
If problem areas exist, the Engineer shall develop alternatives and establish preliminary
construction costs and right-of-way requirements. This task will consist of an interactive
meeting between City staff and the Engineer to discuss one (1) practical alternative for
each identified problem area.
e. The Engineer shall also coordinate with the geotechnical subconsultant (Devo Seereeram,
Ph.D., P.E.) to perform a water budget analysis during a "wet" year. The purpose of the
analysis is to determine the peak flood stage based on annual rainfall in lieu of a single
storm event analysis to determine the critical event.
f. The Engineer shall compile the above referenced information and create five (5) Prairie
Lake/Lake Meadow Drainage Basin exhibits utilizing AutoCAD, Version 12. These
exhibits will be plotted on reproducible mylar in addition to an aerial base map.
III. RECOMMENDED IMPROVEMENTS
The Engineer shall analyze the Prairie Lake/Lake Meadow Drainage Basin taking into account
-the recommended improvements and establish flood stages, flow rates, and duration of flooding.
The Engineer shall perform the following tasks:
4 P-6103
a. The Engineer shall revise basin characteristics for each drainage subbasin which includes
the following parameters: drainage subbasin area (acres), weighted runoff curve number
(CN), time of concentration (Tc, minutes), and peak rate factor.
b. The Engineer shall modify the stormwater model to account for recommended
improvements with respect to stormwater facilities. The Engineer shall revise the input
data files of the existing condition computer model in order to properly analyze existing,
future, and proposed stormwater facilities.
c. Based on the revised basin characteristics and computer model, the Engineer shall analyze
the existing and recommended stormwater facilities for three (3) selected storm events.
The Engineer shall meet with City staff and discuss their findings.
IV. CAPITAL IMPROVEMENTS
The Engineer shall establish a capital improvements program designed to correct identified
deficiencies in levels of service. The Engineer shall perform the following tasks:
a. The Engineer shall coordinate with City staff concerning the selection of the recommended
alternatives/improvements. For each alternative selected, the Engineer shall prepare a
detailed cost estimate which will include material costs and estimated land costs. Based
on the selected alternatives, the Engineer shall determine the amount of additional right-of-
way and/or drainage easement required in order to accommodate the recommended
improvements.
b. The Engineer shall summarize the project cost and right-of-way requirements for each
alternative selected in an engineering report. The Engineer shall prepare a final
Engineering Report which will include the following:
• Existing and proposed basin characteristics.
• Existing and proposed flow rates and peak flood stages for various design storm
events.
• Levels of water quality treatment to receiving water bodies under existing and
proposed conditions.
• Identify problem areas and provide design alternatives taking into account various
parameters to achieve the level of service for the Prairie Lake/Lake Meadow
Basin.
•
• Provide exhibits delineating limits of flooding and location of existing, proposed,
and modified stormwater facilities.
c. This task shall conclude with a presentation to the City Commissioners summarizing the
results contained in the final engineering report.
5 P-6103
510
111111' '11U11-ult -a -
ME,
11111T
Ll
watW
123
Lu
oZ
'V11 -11 t Ll",
'�
r — I
Ci�
1 1 1
mt
Ir
;j
- Lj_
PP
1 1 1 1 M1113-
T-1
I L Milli
IN
Nit,
(too
LLO
cc
MUM
"vilqum,
IjUji, 1. 1 1 -Dll
—
IN 74�
1 . .
IT
.......... . Wi"
---- - - - - -----
"A, Mv
HHU 111111JI-7:
AII—
FT
J-4
(Yj V
I'vil- p I
fill,LI
I
1 11
1111
�TMTT�
.— f��Lji
DERB
affia-9
"F
frj(j1jiluj
y
U11Q
W hOg kWQ LAA L
[HEM-
MEH OL
U
MMW
11HUMN[a-1-2
]WRIHM]
31
PH IL
4:
Ij
a.
11_J.
Ib
MIA - I
Jai
N \O N N CO O O N VG O O et ‘p p
N — r; e+•, 00er se aNO TNNc^. 00NO NO
0 VI
R O C N
F = vi
� 4 N
4,
r. C 00 CO CO N C
'O O
'fl y S.4) N O
3 g� 64 erl N
K
a`
'C 'Co °O :° 'C00= 00>-. A
CO ONCT
Q E-. 63 tr
69
y 0 N '0 '000 N0' N0C 'CC'1 X00
CN en .--, .—, NC N NCO
.O•= `40 N
►-1 ,, an 3
lel
C.. c7 6„ 4,
W
2 .c 0 N \OVO \00000O 'CN0000 et 00 \ONO
+ t... i•• C M •--• ,-4 .-+ 00 O .-•, en N .•. .-- C
= = = 69 .-. er
00
�v ~ CJ c0'� 00 ...
W O Q CA 9 ',:&,,' 503 44, rtO
z >
i c.T. t. 4 .51 CO cO Net E 00 'O 0
N O
) �I C V
Uw6-
oE `'9' `"'
trc
49 NI
Q 'C CC! CCC, � � o00
I 741 ti
C.
-I czi
4, 00
843 4e
U' s O. Ci
•
•1).)
V V1 U G.a ~ 4'
_ _ et
cv H Gr 7 >
(•y O y c3 �jcn
I
o. 'v �„ .g C y CG 4
G o z _
•is �.. � N - Q L'. -5 ,.., �_
co)u >.. L7 L y P Q • S H ..i .T
C � •,. '" a > � u:
8 1. ..g .-...5. 0 0. g c„,
v4 0 2 „ oUE zIdgi 'N20tH
Q Ac. c3 > E.. E E AU1AH.E-
Hc .�
E2z
UONetNcp. ero0NNV0p et o p p
v'sunNN': C [� 00v9v1 \OC Z CCCCC
17 s ~ Q � M ~ C .N400§ iiCD
F = 00 et- ~ N '.0 e+: N tri
44 1 I 6' N ee HHH664
I
y C OCD
o Net — c n CD etv, II II II 11 II
O O
^ � H N CD M
,. gGL 4,
= nu ~ Gi CNN .. '.D O N .._8 .5 r` C N
s � ii �'
6H O N y
y
cil
QF `� 44 T
0
Z ef
y O N N - 'C C M - N N C et N Zcs
5 N C C M i7
'0 O .r 3 N
Q .4./ C 64 C r^ N q :::
q a L 64 .4 � 2 S
69 g g G.O
O I + N I O 00 C' N O O N e p0 N � r, (; ,d
z fC �" y M, er u0 .. - p M N 7 O r
Z •`" a� ^_c»�I o� O C � IEO
q . � Q = .[ _I�,1 MI, o ivy " 3
`L� UJ pp': I t M I O C C N
A � r. � t.-.,.8 a-
CL^
I i I 69 y 3 r O I C,
L',`+ I. 3 Ci ger! ,r c0 30 eterN00C p o Cg —
j r V;j O N •-+ erO C '. cs ,z ..
"0 'O U o a C p 0 .0
O ^ noHcNi I c. o0 0o vn S e
V T o E 69I I � `� .2 >NTi 2 E
E Q .ed a G I 69 a E '"
� Er G 0 wi , I
ctC aC � C I O CO et et 00 O VD
et
G -i 69 0O ,.,
ti •V p 00
44 r.
1 I rm
1
v c I E. _ — c
b eco
V 7 _
,�� Q G L..I v� ' ,
C:1 E 2 > ''
a ,... ,--;:.
F .. E 0 a8G 17 i$
0 ..6 .,..± i 8 a :::: .
C .= E- E- CJ Cgs aFE. C.
Fo
Z
REVISED SCOPE OF SURVEYING SERVICES
LAKE MEADOW AND PRAIRIE LAKE DRAINAGE BASIN STUDY
Ocoee, Florida
ATTACHMENT "C"
1.0 General
The purpose of gathering information regarding drainage facitlities is to provide for
identification of existing drainage conditions. The data will be used to develop a
hydrodynamic drainage basin model which will be utilized by the City of Ocoee to
identify existing drainage problems, to establish the 100-year flood profile, and to
assess the need for drainage improvements.
1.1 Survey Services
The Surveyor shall perform all survey services as outlined herein.
1.2 General Survey Requirements
(1) The Surveyor shall perform a closed bench loop to establish bench marks and
temporary bench marks (TMB's) throughout the limits of the survey area.
(2) The level loop and subsequent bench marks shall be based on National Geodetic
Vertical Datum of 1929 (N.G.V.D. 1929). Orange County bench marks are
acceptable. A bench mark description form will be submitted for each bench
mark set, or existing bench mark used to be incorporated in the City's Bench
Mark catalog.
(3) The survey activities shall be performed in accordance with Section 8:
DRAINAGE DATA, Location Survey Manual, Florida Department of
Transportation, Policy No. 760.001-760.012 and the Minimum Technical
Standards for Land Surveyors, Chapter 21HH-6, F.A.C., pursuant to Section
472.027, Florida Statutes.
1.2.1 Culvert Survey Requirements
When surveying culverts and culvert systems, the Surveyor shall perform the
following:
(1) Determine the size, configuration (Le., round, elliptical, arch, box, etc.), number
PECIPROFESSIONAL ENGINEERING CONSULTANTS 0E-260.501
Revised Scope of Surveying Services Page 2
of barrels, length, and type (Le., CMP, RCP, etc.) of culvert. This shall include
the type of end treatment(Le., concrete straight endwall, concrete headwall with
45° wingwalls, sand cement bag headwall, etc.) and any other physical features
present(Le., guardrails, etc.);
(2) Determine the upstream and downstream invert elevations of the culvert. The
surveyor shall also note whether any sediment and/or vegetation accumulation
is present in the culvert during the survey. If sediment build up is present, the
Surveyor shall remove the accumulation and provide the invert elevation of the
culvert;
(3) Include a complete sketch showing elevations and dimensions in the field notes.
This shall include plan and profile of the culvert(s) surveyed;
(4) Note the location and type of utility(ies) which may be attached to the culvert or
which may interfere with the flow characteristics of such;
(5) Determine the elevation of encountered water surface;
(6) Where culverts cross roadways, survey the profile of the roadway a minimum of
two hundred (200) feet on either side of the culvert at (25-foot intervals) or as
directed by the Engineer(Note: For roadways with superelevations, profile the
highest edge of pavement, otherwise provide roadway profile along centerline);
(7) Provide photgraphs upstream and downstream of each crossing in order to
document the condition, size, configuration, etc. of the culvert to be surveyed;
and
(8) Where manholes or inlets are encounterd, determine the location and top
elevation of the structure. Also survey the invert and size of each pipe connected
to the structure.
1.2.2 Drop Control Structure Survey Requirements
When surveying drop control structures which serve as the outfall control for
stormwater management ponds, the Surveyor shall perform the following:
(1) Determine the inside dimensions of the riser portion of the structure;
(2) Determine the top elevation, weir overflow elevation, and invert elevation of the
structure;
(3) Measure the length of the overflow weir(s);
PEC/PROFESSIONAL ENGINEERING CONSULTANTS 0E-260.S01
Revised Scope of Surveying Services Page 3
(4) Determine the size and invert of underdrains connected to the structure, if
applicable;
(5) Determine the shape, size, and invert of the drawdown orifice, if applicable;
(6) Provide photgraphs of each drop control structure surveyed in order to document
the configuration of the structure; and
(7) Survey the culvert outfall from the drop structure in accordance with the
requirements of Section 1.2.1.
1.3 Survey Locations
The following is an itemization of the survey work to be performed. Refer to the
attached exhibit for the location of each item.
(1) A staff gauge is to be installed in Lake Meadow at a location which is readily
accessable by City of Ocoee personnel. The intent is to set the gauge in a
location where water is deepest, so that as water levels receed it will be
functional for the longest duration. A possible location is adjacent to the existing
Clarke Road pond at the southern end of the lake; however, the exact location
shall be determined by City staff. Contact Buddy Elmore (656-6090) to
coordinate the location of the staff gauge. The current water level in Lake
Meadow is to be recorded in the field notes.
(2) A staff gauge is to be installed in Prairie Lake at a location which is readily
accessable by City of Ocoee personnel. The intent is to set the gauge in a
location where water is deepest, so that as water levels receed it will be
functional for the longest duration. A possible location is adjacent to the existing
stormwater pond in the Forest Oaks Subdivision; however, the exact location
shall be determined by City staff. Contact Buddy Elmore (656-6090) to
coordinate the location of the staff gauge. The current water level in Prairie Lake
is to be recorded in the field notes.
(3) A staff gauge is to be installed in the existing stormwater pond in the southwest
portion of the Sawmill Subdivision. The gauge shall be located such that it is
readily accessable by City of Ocoee personnel; therefore, the exact location shall
be determined by City staff. Contact Buddy Elmore (656-6090) to coordinate the
location of the staff gauge. The current water level in the pond is to be recorded
in the field notes.
(4) The finished floor elevations of the homes on lots 207 through 230 (24 homes)
in the Sawmill Subdivision are to be surveyed. These lots are in the vicinity of
the existing stormwater pond in the southwest portion of the subdivision. The
PEC/PROFESSIONAL ENGINEERING CONSULTANTS 0E-260.501
Revised Scope of Surveying Services Page 4
particular lots of interest are noted on the attached exhibit. Lot numbers are
based on the plat of the Sawmill Subdivision recorded in Plat Book 25, Page 87.
(5) The drop structure in the Carriage Oaks Subdivision pond is to be surveyed per
the requirements of Section 1.2.2. The elevation of the berm along the north side
of the pond is also to be surveyed at a maximum of fifty(50) foot intervals.
(6) The railroad bed to the east of the Forest Oaks Subdivision is to be surveyed to
determine profile elevations at fifty(50)foot intervals. Topographic maps indicate
that the low point of the railroad grade is approximately 750 feet north of Prairie
Lake Boulevard. The survey should extend in each direction from the low point
until elevations are a minimum of two (2) feet above the low point elevation.
(7) Two (2) culverts are located under the railroad east of the Forest Oaks
Subdivision. These culverts connect to the stormsewer collection system for the
subdivision. Beginning on the east side of the railroad, the system of culverts
and structures is to be surveyed per the requirements in Section 1.2.1. The
terminus of the survey is the inlet at the front corner of lots 29 and 30 on
Tranquille Oaks Drive. Lot numbers are based on the plat of the Forest Oaks
Subdivision recorded in Plat Book 13, Page 85.
(8) The drop structure in the Forest Oaks Subdivision pond is to be surveyed per the
requirements of Section 1.2.2. The elevation of the berm between the pond and
Prairie Lake is also to be surveyed at a maximum of fifty(50) foot intervals. The
survey of the berm may be terminated at each end when elevations exceed 90.0
feet.
(9) The system of culverts and structures at the intersection of A.D. Mims Road and
Johio Shores Road is to be surveyed per the requirements of Section 1.2.1.
From this intersection, the survey is to extend northward to include the outfall to
Prairie Lake. Manholes along this segment are to be located and surveyed.
(10) The cross culvert under Clarke Road, immediately north of the intersection with
A. D. Mims Road, is to be surveyed per the requirements of Section 1.2.1.
(11) A stormwater pond has been constructed east of Clarke Road, approximately
2,200 feet north of A. D. Mims Road. An overflow weir has been constructed in
the north access to this pond. Determine the width and elevation of the weir at
the top and bottom. Include a complete sketch of the structure showing
elevations and dimensions in the field notes.
(12) Double cross culverts have been constructed under Clarke Road adjacent to the
existing pond mentioned in Item 11. These culverts are to be surveyed per the
requirements of Section 1.2.1.
PEC/PROFESSIONAL ENGINEERING CONSULTANTS 0E-260.501
Revised Scope of Surveying Services Page 5
(13) The drop structure in the Prairie Lake Subdivision pond is to be surveyed per the
requirements of Section 1.2.2. The terminus of the survey is the inlet on Clarke
Road to which this outfall is connected. The elevation of the berm along the
south side of this pond is also to be surveyed at a maximum of one hundred
(100) foot intervals
(14) The existing stormwater management pond north of Marlene Drive between Adair
Street and Shari Lynn Terrace has two (2) outfall control structures (drop
structures). One discharges northward to an existing depressional area and the
other discharges eastward to the stormsewer collection system on Shari Lynn
Terrace. Both of these drop structures are to be surveyed per the requirements
of Section 1.2.2. All elements of the system which discharges northward are to
be surveyed. The system which discharges eastward is to be surveyed up to the
point of connection with the stormsewer system on Shari Lynn Terrace.
(15) To the north of the existing stormwater management pond mentioned in Item 13
lies a depressional area which discharges northward via a culvert. The culvert
discharge is to be surveyed in accordance with the requirements of Section 1.2.1.
In addition, the elevation of the berm over the pipe is to be surveyed at a
maximum of ten (10) foot intervals. The survey of the berm may be terminated
when elevations are three feet higher than the lowpoint elevation of the berm.
(16) To the north of the depressional area mentioned in Item 14, stormwater runoff
discharges toward Nicole Boulevard via a stream. At Nicole Boulevard,
approximately 400 feet west of Shari Lynn Terrace, runoff is intercepted by an
existing stormsewer system and conveyed northward to a low lying area east of
the Amber Ridge Subdivision. Refer to the attached exhibit for a general location
of the culvert system. This system is to be surveyed per the requirements of
Section 1.2.1. Also, survey elevations at ten (10) foot intervals along the high
point between Nicole Boulevard and the ditch at the upstream end of this culvert
system.
(17) The drop structure in the Amber Ridge Subdivision pond is to be surveyed per
the requirements of Section 1.2.2. The terminus of the survey is the inlet on
Nicole Boulevard to which this outfall is connected. The elevation of the berm
along the east side of the pond is also to be surveyed at a maximum of one
hundred(100) foot intervals.
(18) The cross culvert under Ocoee-Clarcona Road, approximately 900 feet east of
Adair Street, is to be surveyed per the requirements of Section 1.2.1.
(19) The cross culvert under Ocoee-Clarcona Road, approximately 800 feet north of
the intersection with Lauren Beth Avenue, is to be surveyed per the requirements
•
of Section 1.2.1.
•
PEC/PROFESSIONAL ENGINEERING CONSULTANTS 0E-260.S01
Revised Scope of Surveying Services Page 6
(20) The cross culvert under Lauren Beth Avenue, approximately 700 feet south of the
intersection with Ocoee-Clarcona Road, is to be surveyed per the requirements
of Section 1.2.1.
(21) Approximately 300 feet east of Lauren Beth Avenue lies a private roadway
crossing of a tributary to Lake Meadow. The culvert at this location is to be
surveyed per the requirements of Section 1.2.1. Also survey elevations along the
top of the drive over the pipe.
(22) The profile of Ocoee-Clarcona Road is to be surveyed at the low point in the
roadway which is located approximately 500 feet east of the intersection with
Ingram Road. Survey the profile of the roadway a minimum of two hundred(200)
feet on either side of the low point at (25-foot intervals) or as directed by the
Engineer(Note: For roadways with superelevations, profile the highest edge of
pavement, otherwise provide roadway profile along centerline);
(23) The profile of Ocoee-Clarcona Road is to be surveyed at the low point in the
roadway in the vicinity of the intersection with Lauren Beth Avenue. Survey the
profile of the roadway a minimum of two hundred(200) feet on either side of the
low point at (25-foot intervals) or as directed by the Engineer (Note: For
roadways with superelevations, profile the highest edge of pavement, otherwise
provide roadway profile along centerline);
1.4 Additional Surveys
In the event that additional survey services are required to prepare the drainage study,
a maximum of ten (10) crew days shall be allocated to conduct such miscellaneous
surveys. This includes but is not limited to additional surveys of pertinent drainage
structures.
1.5 Documentation
All survey notes (to be reduced by Surveyor) and sketches shall be documented in
appropriate field books, which will be submitted to the City of Ocoee upon completion
of the survey tasks.
1.6 Background Information
PEC has copies of most construction plans and some plats within the study area.
These items will be made available to the surveyor upon request.
•
PEC/PROFESSIONAL ENGINEERING CONSULTANTS 0E-260.S01
zSs u h - •
�"' William E.Byrd,P.S.
Brian K.Hefner,P,S,
-7511 v - n9 rtiic Gary B.Krick,P.S.
/t/MI�����` Roger Lonevvay,P.S.
Jamas L.Petersen;P.S.
SOUTHEASTERN SURVEYING&MAPPING CORP.
MEMORANDUM
TO: David Hsmstra, P.E.
FROM: Jim Petersen
DATE: July 17, 1996
RE: Survey Services For Lake Meadow And Prairie Lake Drainage Basin Study,
Ocoee, Florida
The purpose of this memo is to confirm our telephone conversation whereby I agreed to
conform to the requirements of the revised scope of surveying services attached to your
letter, dated July 3, 1996, provided the alternative scope items attached to our proposal
letter, dated March 18, 1996, are still acceptable.
•
\WPeo\DATA`CCRRESP MAMSTRA
Cr,C Cw,.�4 Gww.... w G .1�..�..e G...l 11.1%M;.....O... C7w.{rw-rf-rw7 •w'!/11,0 OT9{7 Cw_.w •..•-•
~wane UNIMIMMII1111
•
�SOII jl�3S - William E.Byrd,P.S.
Brian K.Hefner,P.S.
—SU fYei in Gary B.Krick,P.S.
lintilirnau == Roger Lonsway,P.S.
James L Petersen,P.S.
SOUTHEASTERN SURVEYING&MAPPING CORP. •
March 18, 1996
2 E c E i v E J
' 1996
Mr. Michael B. Galura, P.E. "" ' ?.%-n-, eN0
Professional Engineering Consultants, Inc. i._;_='``� �= t f ;N
200 East Robinson Street
Suite 1560 _.
Orlando, FL 32801
1
RE: Master Drainage Plan - Work Order No. 11 1
Prairie Lake/Lake Meadow Drainage Basin Study f
Dear Mr. Galura,
Please accept our fee proposal of Sixteen Thousand Four Hundred Eighty Dollars &00/100
($16480.00) for the Scope of Surveying Services that accompanied your letter dated March
11, 1996. The fee is based on alternative methods and final products that I have detailed
in my attached Alternative Scope of Surveying Services. Your scope is a very good one, but
we believe that when our Alternative Scope adds the efficiency of GPS and electronic data
collecting and delivers data in larger format books, the City will have received a better
product for less cost. Because of the differences between our approach and the
conventional requirements in your scope, manhours are not relevant. The total fee
proposed does include the 10 crew days for miscellaneous surveys described in 1.2.5..
Sincerely,
ibo
ames L. Petersen, P.S.
Vice President/Project Manager
JLP:dl
Attachment
•
o: wP9o\DAT,\esoeosAi.v.so.onc
925 South Semoran Boulevard.Suite 7 12 Winrar Park Fn 99709 Ail 7/R7C_o7ae C-.. ,."C", .
MASTER DRAINAGE PLAN - WORK ORDER NO. 11
PRAIRIE LAKE/LAKE MEADOW DRAINAGE BASIN STUDY
These Alternative Scope items define those portions of the work for which a proposed
departure from the PEC scope will be applied. GPS or electronic data collection will be
applied to furnish a product equal to the requirements of the PEC scope.
1.2 (1) The Surveyor shall establish bench marks and temporary bench marks in the
vicinity of the survey area near surveyed facilities by *RTK GPS.
1.2 (3) The FDOT Location Survey Manual does not speak to GPS or electronic field
data collection methods.
1.2.1 (4) "Photographs" will be interpreted as two 3" X 5" color views of each section.
1.3 Wherever "field books" appear in the PEC scope, this proposal will furnish 8.5 X 11
three ring binders containing laser or dot matrix printed reports, sketches, or
tabulated data equal to or better than traditional field books.
*Real Time Kinematic
DAV/P0 OATAPPOPo8AL4594CPEc
/sau ea=se .
- 145---wrin a Alai-
,