Alignment Design Memorandum January, 2016 · Alignment Design Memorandum January, 2016 . George...
21
WESTWOOD ESTATES/ST. MARY’S/STEEPLECHASE/ST. PETERS ESTATES SPECIAL SERVICE AREA SANITARY SEWER IMPROVEMENT PROJECT Alignment Design Memorandum January, 2016
Transcript of Alignment Design Memorandum January, 2016 · Alignment Design Memorandum January, 2016 . George...
WESTWOOD ESTATES/ST.
MARY’S/STEEPLECHASE/ST. PETERS
ESTATES SPECIAL SERVICE AREA
SANITARY SEWER IMPROVEMENT
PROJECT
Alignment Design Memorandum
January, 2016
George Butler Associates, Inc. Page ii
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 iii
FIGURES
Figure 1 Project Area
George Butler Associates, Inc. Page iv
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 1
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.
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
PROJECT NUMBER
13347
FIGUR
E 1PR
ELIM
INAR
Y MEM
ORAN
DUM
PROJ
ECT A
REA M
AP
NOV. 2015
Westwood Estates/St. Mary's/
Steeplechase/ St.Peters Estates SpecialService Area SanitarySewer Improvement
Project
³LegendProject LocationCity LimitsSite AccessParcels
George Butler Associates, Inc. Page 3
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 4
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 5
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 1
st).
George Butler Associates, Inc.
ATTACHMENT 1
UTILITY COORDINATION LOG
PROJECT: -
JOB NUMBER: - -
PROJECT MANAGER: - -
UTIL COORDINATOR: -
CLIENT:
NOTIFICATION OF
Address COORDINATION
MEETING
Beverly Wilson 1901 Chouteau, PO Box 66149
(314) 554-2570 MC 700
[email protected] St. Louis, MO 63166
Joe Pippin 402 N. 3rd
(636) 949-1328 St. Charles, MO 63301
Lisa Ward 941 Charter Commons
(636) 387-6633 Town & Country, MO 63017
[email protected] [email protected]
Laura Bandy 4118 Shrewsbury Ave
[email protected] St. Louis, MO 63119
David Bear One St. Peters Centre Blvd
(636) 477-6600 ext. 1312 St. Peters, MO 63376
Marcia Gay
(636) 332-7261
Katie Stimetz 727 Craig Rd
St. Louis, MO 63141
(VM) Voice Mail; (T) Telephone; (E) Email; (L) Letter; (M) Meeting
GENERAL NOTES
LETTING:
225 S. MAIN, SUITE 200
O'FALLON, MO 63366
(636) 240-2444
EXECUTED
AGREEMENT
FINAL PLAN
SUBMITTAL
UTILITY COORDINATION LOG(version 1.1)
City of St. Peters, MO
Charter Communications
(E) request for maps 9/18/15; received
maps 9/21/15; GBA to submit plans for
review
ANTICIPATED SCHEDULE
Ameren Missouri Electric
PRELIMINARY PLAN
SUBMITTAL
FOLLOW-UP
CONTACT FOR
SURVEY LOCATESPRELIMINARY PLAN SUBMITTALUTILITY COMPANY
Missouri American
Water Company
CenturyLink
City of St. Peters
(Sewer)
(E) request for maps 9/21/15; Maps
received 11/9/15; GBA to submit plans
for review
(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
PROJECT SUMMARY
Steeplechase Sewer Improvements
13347
Matt Auld
Kierstyn Lorince
GIS sewer mapping provided by City at
start of project
mapping not available; GBA to submit
plans for review
PRELIMINARY PLANS:
RIGHT-OF-WAY PLANS:
FINAL CHECK PLANS:
FINAL PLANS:
CONTACT INITIAL CONTACT
RECEIVED
VERIFICATION OF
UTILITIES
BEGIN CONSTRUCTION:
PROJECT COMPLETION:
RECEIVED UTILITY
PLAN OF
ADJUSTMENT
COORDINATION
MEETING
FINAL CHECK PLAN
SUBMITTAL
FINAL CHECK PLAN
SUBMITTAL
FOLLOW-UP
3RD FOLLOW-UP
mapping not available; GBA to submit
plans for reviewAT&T Distribution
(E) request for maps 9/18/15; received
maps 9/24/15; GBA to submit plans for
review
Laclede Gas Company
George Butler Associates, Inc.
ATTACHMENT 2
LIST OF POTENTIALLY AFFECTED PROPERTY OWNERS
Potentially Affected Property Owners
Westwood Estates/St. Mary's/Steeplechase/St. Peters Estates Special Service Area Sanitary Sewer Improvement Project
November 18, 2015
Ingress
/ EgressTCE
Permanent
EasementOwner Name Address County Parcel ID
X X RICHARD L CARR & AVERIL E CARR 5 ELM COURT 2-062A-4969-00-0108
X X WALTER E BOYD & MARY E BOYD 7 ELM COURT 2-062A-4969-00-0107
X X JOHN W BORGMEYER & WANZA J BORGMEYER 9 ELM COURT 2-062A-4969-00-0106
X X AARON WOOLSEY 11 ELM COURT 2-062A-4969-00-0105
X X BENJAMIN R JUNG 13 ELM COURT 2-062A-4969-00-0104
X X DOUG W HOLLINGSHEAD & DONNA S HOLLINGSHEAD 15 ELM COURT 2-062A-4969-00-0103
X X RICHARD A SCHROER & PHYLLIS A SCHROER 17 ELM COURT 2-062A-4969-00-0102
X X MATTHEW EHMAN 14 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0311
X X JOHN C RAY JR 16 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0310
X X S&S KELLER COMPANY IV LLC 18 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0309
X X FRED J MOSES & JEAN M MOSES 20 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0308
X X CITY OF ST. PETERS 22 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0307
X X OLIVIA A LINDSEY & KEITH A LINDSEY & EMILY N LINDSEY 24 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0306
X X STANLEY T SCHOTT & JUDY K SCHOTT, REVOC INTER VIVOS TRUSTS 26 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0305
X X TARAM HERTLEIN 28 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0304
X X GREGORY LARAMIE & SAVANNAH P BALTIMORE 30 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0303
X X
THOMAS SCHWEITZER, KATELYN NELSON, JAMES ANDREW NELSON
& KELLY L NELSON 32 CHURCHILL DOWNS DRIVE 2-062A-4428-00-0302
X X X WESTWOOD ESTATES TRUSTEES OF RECORD ELM COURT 2-062A-4969-00-0111
X X X WESTWOOD ESTATES TRUSTEES OF RECORD OAK DRIVE 2-055D-4969-00-0112
X X X CITY OF ST. PETERS GOLF COURSE/ELM CT 2-062A-4969-00-0111
Property Impact Property Owner Information
Page 1 of 1
George Butler Associates, Inc.
ATTACHMENT 3
SIPHON LOCATION CREEK NOTES
BPJob No._______________
architectsDate
_________________
engineers By Chk’d______
?S AJ.7 Cc-Z/1J-
- ,%— ,.s 6e111 S74f14 T?E- 4Vr,q-V &4rz2 ,12rjt’ -2
214’l ,yre 1s ‘C’ > ‘ Ic ,14iJ4r’ fZcM4 rc
- ZZ TO E/)7,4IJ2/ 74-,4i oi á
____
‘ )r S4Di’ P 7cTJM1 /O ‘- ‘ cfr-L r4/4[EL.-r -AV C,eZTrCI4 L ‘Z- 6’6s6 S
— i/ /. 1Jh’OL M’Z/Z/ f’c41 %W
L)ZC MVk S• rro,V4L ZW2G ç .
44 ,
‘ ‘? 72 ,4e çi o
TL SiA- 4:r cV ÷
( /efr
________
of
z
U.
Dardenne Creek
438437 .
____...........—.
436
___________
i I I
I
___
432
__________
431 — -
_______
I .. . I I I
0 100 200 300 400 500 600 700 800 900 1000
Channel Distance (ft)
• bed I water srf • ban kfull t x-section o riffle crest • pool • run glide x --- + --- - --- Linear (---)
cJ
lb.’ 4k
.
S O
George Butler Associates, Inc.
ATTACHMENT 4
PRELIMINARY ALIGNMENT
!
!
!
!
!
!
!
!!
!
!
!
!
!
!
!!
!
!
!
!
!
!
!
!
!
!
!
!!!!!!!
!
!
!
!!
!
!
!!
!
!
!
!
!!
!
!
!!
!
!
!
!
!
!
!
!
!
!
!
!!
!
!!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!(!(!(
!(
!(!( !(
!(
!(
!(
!(!(
!(
!(
!(
!(
!(
!(
476'36IN PVC
394'
12IN
PVC
390'12IN PVC341'18IN PVC
339'18IN PVC
333'
18IN
PVC
328'
12IN
PVC
228'
12IN
PVC
223'18IN PVC
145'
15IN
PVC
120'18IN PVC
61'12IN PVC
200
2
7
3
2
5
6
8
2
5
1
9
14
8
6
5
4
6 4
8
1
3
7
4
3
1
9
1
2
17
2
3
3
97
5
68
14
5
1617
1
2
8 46
13
18 15
4
2
11
38
4
8
6
9
9
4
6
8
10
66
7
32
12
16
5
54
48
12
15
25
40
30
3
64
24
22
36
11
7440
33
10
52
11012
26
30
1
47
13
32
112
13
11
23
39
17
52
2018
28
1513
1012
14
11616
24
122
114
142
118
124
128130
132134
136138
140
35
34
125
126
11
120
42
119
28
10
62
11
37
26 19
10
1715
44
19
46
21
48 50
57
56
59
49
48
55
50
54
23
21
19
17
15
13
12
10
14
16
18
20
24
26
28
30
12
108
46
31
117
32
113115
137
133
129
135
127
139
131
141
53
143
46
145
47
111 28
52
18
21
22
20
60
1615
18
2414
16
14
18109 13
14
30
25
12
16
51
44
10
45
44
743023
8
45
50
Oak Dr
Hialea
h Dr
Elm Dr
Elm Ct
Maple St
Churc
hill Do
wns D
r
Westwood Estates Dr
Jamaica Dr
Home
stead
Dr
Santa Anita Ct
Steeplechase Dr
St Luke Dr
Chestnut Ct
Elm Dr
PROJECT NUMBER
13347
ATTA
CHME
NT 4
PREL
IMIN
ARY A
LIGNM
ENT
NOV. 2015
Westwood Estates/St. Mary's/
Steeplechase/ St.Peters Estates SpecialService Area SanitarySewer Improvement
Project
³
Legend!( Proposed Manhole
Proposed SewerProposed Siphon
!( Existing Manhole AbandonmentExisting Sewer Abandonment
! Existing ManholeExisting Sewer
PROPOSED SIPHON
140'3-12 IN DIP1-8 IN DIP
George Butler Associates, Inc.
ATTACHMENT 5
PRELIMINARY ENGINEER’S ESTIMATE OF PROBABLE COST AND QUANTITY
TAKEOFFS
Average Estimated Capital
Task Units Quantity Unit Cost Cost Cost(1)
Relief Sewers
Mobilization LS 1 $25,000 $25,000 $31,250
Excavation Class "C" CY 6116 $25 $152,900 $191,125
Dewatering AL 1 $8,000 $8,000 $10,000
Bypass Pumping LS 1 $12,000 $12,000 $15,000
Seeding SY 547 $2 $1,094 $1,368
Protection and Restoration of Site LS 1 $55,000 $55,000 $68,750
Street Pavement - Asphaltic Concrete Remove & Replace SY 15 $67 $1,005 $1,256
Street Pavement - Concrete Remove & Replace SY 32 $68 $2,176 $2,720
Granular Backfill CY 43 $36 $1,548 $1,935
Manhole Cover Seals EA 13 $145 $1,885 $2,356
Manhole Frame Seals EA 13 $360 $4,680 $5,850
Manhole-Standard Construction LF 155 $350 $54,250 $67,813
Pipe Sewer 12 inch (Sanitary/Combined) LF 1401 $95 $133,095 $166,369
Pipe Sewer 15 inch (Sanitary/Combined) LF 254 $105 $26,670 $33,338
Pipe Sewer 18 inch (Sanitary/Combined) LF 1372 $120 $164,640 $205,800
Pipe Sewer 36 inch (Sanitary/Combined) LF 476 $320 $152,320 $190,400
Bentonite Plug EA 15 $250 $3,750 $4,688
Abandonment-Pipe Fill CY 15 $190 $2,850 $3,563
Abandon Structure EA 5 $1,100 $5,500 $6,875
Siphon
Ductile Iron Pipe Sewer 08 inch Class 50 LF 140 $150 $21,000 $26,250
Ductile Iron Pipe Sewer 12 inch Class 52 LF 420 $190 $79,800 $99,750
Junction Box EA 2 $25,000 $50,000 $62,500
Encasement- Class "A" Concrete CY 50 $250 $12,500 $15,625
Zone 1 Plantings SY 50 $15 $750 $938
Class I Rock Toe SY 60 $95 $5,700 $7,125
Total $978,113 $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.
