WESTWOOD ESTATES/ST.
MARY’S/STEEPLECHASE/ST. PETERS
ESTATES SPECIAL SERVICE AREA
SANITARY SEWER IMPROVEMENT
PROJECT
Alignment Design Memorandum
January, 2016
TABLE OF CONTENTS
Preliminary Design Memorandum ...............................................................................................1
A.
Introduction ....................................................................................................................1
B.
Record Data Search .......................................................................................................3
C.
Utility Service Provider Coordination .........................................................................3
D.
Schematic Design ...........................................................................................................4
1. Ingress-Egress ..............................................................................................................4
2. Easements and Property Owners .................................................................................5
E.
Creek Evaluation ...........................................................................................................5
F.
Additional Considerations ............................................................................................5
1. St. Peters Golf Course ..................................................................................................5
George Butler Associates, Inc.
Page ii
FIGURES
Figure 1
Project Area
George Butler Associates, Inc.
Page iii
ATTACHMENTS
ATTACHMENT 1 - UTILITY COORDINATION LOG
ATTACHMENT 2 - LIST OF POTENTIALLY AFFECTED PROPERTY OWNERS
ATTACHMENT 3 – SIPHON LOCATION CREEK NOTES
ATTACHMENT 4 – PRELIMINARY ALIGNMENT
ATTACHMENT 5 - PRELIMINARY ENGINEER’S ESTIMATE OF PROBABLE COST AND
QUANTITY TAKEOFFS
George Butler Associates, Inc.
Page iv
PRELIMINARY DESIGN MEMORANDUM
A. Introduction
This Alignment Design Memorandum discusses and transmits work performed to date for the
Westwood Estates/St. Mary’s/Steeplechase/St. Peters Estates Special Service Area Sanitary
Sewer Improvement Project. The project is located in a residential area south of I-70, east of
Highway 79 and the St. Peters Golf Course.
George Butler Associates, Inc. (GBA) completed a Sanitary Sewer Evaluation Study (SSES)
of this area in July 2015 and developed recommendations for sewer improvements. The
recommended improvements include several larger diameter sewer pipes and a new inverted
siphon where the sewer crosses Dardenne Creek to relieve basement backups and sanitary
sewer overflows (SSOs) within the system. GBA has been assigned the task of completing
the design of recommended improvements for the project.
The project area is located in a residential area outside of city limits and is shown on Figure
1. The project reach is generally bounded by Westwood Estates Drive to the north, Hialeah
Drive to the east, St. Peters Golf Course to the west, and common ground to the south.
The majority of the project area development was built in the 1960’s and 1970’s as part of
the Westwood Estates, St. Mary’s, Steeplechase and St. Peters Estates Subdivisions. This
watershed has limited potential for additional development.
George Butler Associates, Inc.
Page 1
PRELIMINARY MEMORANDUM
PROJECT AREA MAP
FIGURE 1
PROJECT NUMBER
13347
NOV. 2015
Legend
Project Location
City Limits
Site Access
Parcels
Sources: Esri, HERE, DeLorme, USGS, Intermap, increment P Corp., NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand),
MapmyIndia, © OpenStreetMap contributors, and the GIS User Community
³
Westwood Estates/
St. Mary's/
Steeplechase/ St.
Peters Estates Special
Service Area Sanitary
Sewer Improvement
Project
GBA’s project approach entails increasing the capacity of the siphon and select sewers to
accomplish the project goals. This submittal includes the following attachments:





Utility Coordination Log
List of Potentially Affected Property Owners
Siphon Location Creek Notes
Preliminary Alignment Sketch
Preliminary Engineers Estimate of Probable Cost and Quantity Takeoffs
B. Record Data Search
Preliminary investigations were performed to assist in the preliminary design. Existing
information was reviewed and field investigations were performed. The field investigations
focused on constructability issues and an evaluation of stream impacts at the siphon location.
GBA received parcel and utility data from the City at the beginning of the project. These data
files were reviewed and in some cases additional data was requested. In cases where data
gaps were identified additional information was requested and utilized as needed. The
following data was provided by the City:


City GIS (including parcels, utilities, etc.)
Project Aerials
C. Utility Service Provider Coordination
A list of utility providers in the project area was obtained from Missouri One Call. The
utilities were contacted by GBA. Some of the utilities responded by providing utility
mapping or highlighting utility conflicts between their infrastructure and the proposed project
area. Based on the mapping provided, significant utility conflicts are not anticipated. GBA
will provide copies of the Preliminary 60% Design Plans to the utilities for review when
available. Initial contact information was recorded in a Utility Coordination Log. A copy of
the Utility Coordination Log is included as Attachment 1. Information was obtained from
the following utility providers:







Ameren Missouri Electric
AT&T
Charter Communications
Laclede Gas Company
CenturyLink
Missouri American Water
City of St. Peters
George Butler Associates, Inc.
Page 3
In, addition, GBA’s surveyor sub-consultant for this project, BAX Engineering, Inc. has
surveyed utilities while performing the topographic survey field work. Detailed costs for
potential utility conflicts are not included in the preliminary cost opinion section at this time.
This includes irrigation piping and sprinklers at the City golf course which have not been
surveyed at this time.
D. Schematic Design
Preliminary investigations were performed to assist in the proposed design. Existing
information was reviewed and field investigations were performed. The field investigations
focused on an evaluation of stream impacts at the siphon location.
The preliminary alignment was presented as the recommended alternative in GBA’s July
2015 SSES Report. Adjustments were made to incorporate notes from GBA’s Stream Team
field investigation efforts from September 9, 2015. The proposed alignment includes
upsizing several existing sewers and the inverted siphon at the creek crossing. To relieve the
SSO and basement backups in the Westwood and Steeplechase areas, the sewer carrying flow
from Churchill Downs Dr. to Elm Ct. will be abandoned, along with two existing manholes.
Instead, new sewer will be constructed south along the rear lot lines and turn westward,
connecting to an existing manhole south of 14 Elm Ct. Furthermore, the existing overloaded
siphon will be replaced by a quadruple barrel (one 8-inch and three 12-inch diameter pipes)
siphon to provide adequate capacity and velocity. Based on notes from the Stream Team
evaluation, the new siphon crossing will be located approximately 30 feet upstream of the
existing crossing, which will require construction of new manholes and abandonment of the
existing siphon components. The gravity sewer will then discharge to an existing manhole in
the golf course along the 42-inch Golf Course interceptor. A preliminary design alignment is
included as Attachment 4.
The proposed sewer is planned to be constructed in a manner such that the existing sewers
can be abandoned in place, the amount of bypass pumping can be minimized, and existing
easements can be utilized as much as possible. This could be achieved by offsetting new
sewers by a few feet on one side parallel to existing sewers.
1. Ingress-Egress
In the portion of the project within the golf course (west of Dardenne Creek), the City
owns the access points and temporary construction easements (TCE) are not
anticipated to be a significant concern.
A significant portion of the project will be constructed within subdivision common
ground and existing easement along the rear property lines of parcels between Elm
Ct. and Churchill Downs Dr. The upgraded existing sewers will generally follow the
same alignment, while the new sewers will extend along the rear property lines to the
common ground behind the properties at the end of Elm Ct. A likely access point is
through the Westwood Estates common ground/existing 50-foot Missouri American
George Butler Associates, Inc.
Page 4
Water utility easement between 122 and 124 Oak Dr. There is also an access point to
the common ground from Elm Ct. between 14 and 16 Elm Ct.
2. Easements and Property Owners
In general, it appears that sewer construction may be mostly confined within existing
City property, subdivision common ground and existing utility easements. Some new
permanent utility easements and TCEs are anticipated between Elm Ct. and Churchill
Downs Dr. A list of potentially affected property owners is included as Attachment 2.
E. Creek Evaluation
GBA’s Stream Team evaluated the reach of Dardenne Creek where the new inverted siphon
is planned to cross beneath the creek. The purpose of this evaluation was to locate any
existing hydraulic features and to identify possible stabilization measures to ensure the
proposed crossing won’t interfere with existing creek hydraulics. As a result of this
evaluation, it was recommended that the proposed siphon be moved a minimum of 30 feet
upstream of the existing riffle, which is located at the site of the existing sewer crossing. It
was also recommended that a rock toe be placed on the right slope, upstream of the existing
riffle. The existing riprap present on the right bank, 2 feet above the water surface, should
not be disturbed. The Stream Team also added that the slopes should be revegetated with
Zone 1 plantings following construction. Notes and sketches from the creek evaluation are
included as Attachment 3.
Additionally, GBA performed a preliminary on-site delineation of the waters of the United
States and identified impacts on the channel and anticipated permitting issues. Two potential
jurisdictional waters were identified within the project corridor including 1) Dardenne Creek
and 2) emergent wetland swale. Project construction is anticipated to result in only temporary
fill impacts within these two waters; therefore, the project should qualify for a U.S. Army
Corps of Engineers Section 404 Nationwide Permit 12 “Utility Line Activities”. While
agencies including U.S. Fish & Wildlife Service, Missouri Department of Conservation, and
the State Historic Preservation Office have not been contacted at this phase of the project,
GBA does not anticipate any potential issues with endangered/threatened species or historic
resources.
F. Additional Considerations
1. St. Peters Golf Course
A new sewer line is proposed through the golf course, connecting the new siphon to the
existing 42-inch golf course interceptor. Golf course sprinkler locations have not been
surveyed at this time. Based on a previous project that went through the golf course,
GBA understands that construction should be staged to keep the course playable,
preferably during the winter months (December 1st to March 1st).
George Butler Associates, Inc.
Page 5
ATTACHMENT 1
UTILITY COORDINATION LOG
George Butler Associates, Inc.
225 S. MAIN, SUITE 200
O'FALLON, MO 63366
(636) 240-2444
UTILITY COORDINATION LOG
(version 1.1)
PROJECT SUMMARY
UTILITY COMPANY
CONTACT
Beverly Wilson
Ameren Missouri Electric (314) 554-2570
AT&T Distribution
ANTICIPATED SCHEDULE
Steeplechase Sewer Improvements
13347
Matt Auld
Kierstyn Lorince
City of St. Peters, MO
PROJECT:
JOB NUMBER:
PROJECT MANAGER:
UTIL COORDINATOR:
CLIENT:
Address
1901 Chouteau, PO Box 66149
MC 700
bwilson@ameren.com
St. Louis, MO 63166
Joe Pippin
402 N. 3rd
(636) 949-1328
St. Charles, MO 63301
CONTACT FOR
SURVEY LOCATES
PRELIMINARY PLANS:
RIGHT-OF-WAY PLANS:
FINAL CHECK PLANS:
FINAL PLANS:
INITIAL CONTACT
mapping not available; GBA to submit
plans for review
mapping not available; GBA to submit
plans for review
jp8512@att.com
Lisa Ward
Charter Communications (636) 387-6633
Laclede Gas Company
941 Charter Commons
Town & Country, MO 63017
lisa.ward@charter.com
mapping-design@charter.com
Laura Bandy
4118 Shrewsbury Ave
laura.bandy@thelacledegroup.com St. Louis, MO 63119
maprequest@lacledegas.com
City of St. Peters
(Sewer)
David Bear
One St. Peters Centre Blvd
(636) 477-6600 ext. 1312
St. Peters, MO 63376
(E) request for maps 9/18/15; received
maps 9/21/15; GBA to submit plans for
review
(E) request for maps 9/18/15; received
maps 9/24/15; GBA to submit plans for
review
GIS sewer mapping provided by City at
start of project
dbear@stpetersmo.net
Marcia Gay
CenturyLink
(E) request for maps 9/21/15; Maps
received 11/9/15; GBA to submit plans
for review
(636) 332-7261
marcia.gay@centurylink.com
Missouri American
Water Company
Katie Stimetz
727 Craig Rd
St. Louis, MO 63141
katherine.stimetz@amwater.com
(E) to Jamie Richardson 9/21/15; reply
9/21/15 indicates that Katie is now
contact for plan review; GBA to submit
plans for review
(VM) Voice Mail; (T) Telephone; (E) Email; (L) Letter; (M) Meeting
GENERAL NOTES
PRELIMINARY PLAN SUBMITTAL
PRELIMINARY PLAN NOTIFICATION OF
SUBMITTAL
COORDINATION
FOLLOW-UP
MEETING
COORDINATION
MEETING
LETTING:
BEGIN CONSTRUCTION:
PROJECT COMPLETION:
-
RECEIVED
VERIFICATION OF
UTILITIES
3RD FOLLOW-UP
FINAL CHECK PLAN
SUBMITTAL
FINAL CHECK PLAN
SUBMITTAL
FOLLOW-UP
-
RECEIVED UTILITY
PLAN OF
ADJUSTMENT
EXECUTED
AGREEMENT
FINAL PLAN
SUBMITTAL
ATTACHMENT 2
LIST OF POTENTIALLY AFFECTED PROPERTY OWNERS
George Butler Associates, Inc.
Potentially Affected Property Owners
Westwood Estates/St. Mary's/Steeplechase/St. Peters Estates Special Service Area Sanitary Sewer Improvement Project
Property Impact
Ingress
/ Egress
X
X
X
Property Owner Information
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Permanent
Easement
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
TCE
November 18, 2015
Owner Name
Address
RICHARD L CARR & AVERIL E CARR
WALTER E BOYD & MARY E BOYD
JOHN W BORGMEYER & WANZA J BORGMEYER
AARON WOOLSEY
BENJAMIN R JUNG
DOUG W HOLLINGSHEAD & DONNA S HOLLINGSHEAD
RICHARD A SCHROER & PHYLLIS A SCHROER
MATTHEW EHMAN
JOHN C RAY JR
S&S KELLER COMPANY IV LLC
FRED J MOSES & JEAN M MOSES
CITY OF ST. PETERS
OLIVIA A LINDSEY & KEITH A LINDSEY & EMILY N LINDSEY
STANLEY T SCHOTT & JUDY K SCHOTT, REVOC INTER VIVOS TRUSTS
TARAM HERTLEIN
GREGORY LARAMIE & SAVANNAH P BALTIMORE
THOMAS SCHWEITZER, KATELYN NELSON, JAMES ANDREW NELSON
& KELLY L NELSON
WESTWOOD ESTATES TRUSTEES OF RECORD
WESTWOOD ESTATES TRUSTEES OF RECORD
CITY OF ST. PETERS
Page 1 of 1
County Parcel ID
5 ELM COURT
7 ELM COURT
9 ELM COURT
11 ELM COURT
13 ELM COURT
15 ELM COURT
17 ELM COURT
14 CHURCHILL DOWNS DRIVE
16 CHURCHILL DOWNS DRIVE
18 CHURCHILL DOWNS DRIVE
20 CHURCHILL DOWNS DRIVE
22 CHURCHILL DOWNS DRIVE
24 CHURCHILL DOWNS DRIVE
26 CHURCHILL DOWNS DRIVE
28 CHURCHILL DOWNS DRIVE
30 CHURCHILL DOWNS DRIVE
2-062A-4969-00-0108
2-062A-4969-00-0107
2-062A-4969-00-0106
2-062A-4969-00-0105
2-062A-4969-00-0104
2-062A-4969-00-0103
2-062A-4969-00-0102
2-062A-4428-00-0311
2-062A-4428-00-0310
2-062A-4428-00-0309
2-062A-4428-00-0308
2-062A-4428-00-0307
2-062A-4428-00-0306
2-062A-4428-00-0305
2-062A-4428-00-0304
2-062A-4428-00-0303
32 CHURCHILL DOWNS DRIVE
ELM COURT
OAK DRIVE
GOLF COURSE/ELM CT
2-062A-4428-00-0302
2-062A-4969-00-0111
2-055D-4969-00-0112
2-062A-4969-00-0111
ATTACHMENT 3
SIPHON LOCATION CREEK NOTES
George Butler Associates, Inc.
Job No._______________
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Date
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ATTACHMENT 4
PRELIMINARY ALIGNMENT
George Butler Associates, Inc.
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PRELIMINARY ALIGNMENT
116
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15
ATTACHMENT 4
114
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³
Westwood Estates/
St. Mary's/
Steeplechase/ St.
Peters Estates Special
Service Area Sanitary
Sewer Improvement
Project
!
ATTACHMENT 5
PRELIMINARY ENGINEER’S ESTIMATE OF PROBABLE COST AND QUANTITY
TAKEOFFS
George Butler Associates, Inc.
Task
Relief Sewers
Mobilization
Excavation Class "C"
Dewatering
Bypass Pumping
Seeding
Protection and Restoration of Site
Street Pavement - Asphaltic Concrete Remove & Replace
Street Pavement - Concrete Remove & Replace
Granular Backfill
Manhole Cover Seals
Manhole Frame Seals
Manhole-Standard Construction
Pipe Sewer 12 inch (Sanitary/Combined)
Pipe Sewer 15 inch (Sanitary/Combined)
Pipe Sewer 18 inch (Sanitary/Combined)
Pipe Sewer 36 inch (Sanitary/Combined)
Bentonite Plug
Abandonment-Pipe Fill
Abandon Structure
Siphon
Ductile Iron Pipe Sewer 08 inch Class 50
Ductile Iron Pipe Sewer 12 inch Class 52
Junction Box
Encasement- Class "A" Concrete
Zone 1 Plantings
Class I Rock Toe
Total
Average
Unit Cost
Estimated
Cost
Capital
Cost(1)
Units
Quantity
LS
CY
AL
LS
SY
LS
SY
SY
CY
EA
EA
LF
LF
LF
LF
LF
EA
CY
EA
1
6116
1
1
547
1
15
32
43
13
13
155
1401
254
1372
476
15
15
5
$25,000
$25
$8,000
$12,000
$2
$55,000
$67
$68
$36
$145
$360
$350
$95
$105
$120
$320
$250
$190
$1,100
$25,000
$152,900
$8,000
$12,000
$1,094
$55,000
$1,005
$2,176
$1,548
$1,885
$4,680
$54,250
$133,095
$26,670
$164,640
$152,320
$3,750
$2,850
$5,500
$31,250
$191,125
$10,000
$15,000
$1,368
$68,750
$1,256
$2,720
$1,935
$2,356
$5,850
$67,813
$166,369
$33,338
$205,800
$190,400
$4,688
$3,563
$6,875
LF
LF
EA
CY
SY
SY
140
420
2
50
50
60
$150
$190
$25,000
$250
$15
$95
$21,000
$79,800
$50,000
$12,500
$750
$5,700
$978,113
$26,250
$99,750
$62,500
$15,625
$938
$7,125
$1,222,641
Notes:
(1) Capital costs include 25% contingency
(2) Cost does not include property acquisition, easement preparation, rock excavation or bid period/construction
phase services.