HomeMy WebLinkAbout03-09-20 Drainage and Flooding Committee MeetingJAY MARTIN
CHAIRMAN
DANNYEARP
VICE-CHAIRMAN
CHUCK ENGELKEN
MEMBER
CITY OF LA PORTE DRAINAGE AND FLOODING COMMITTEE
MEETING AGENDA
STEVE GILL ETT
ALTERNATE
Notice is hereby given of a meeting of the Drainage and Flooding Committee of the City Council of
the City of La Porte, to be held March 9, 2020, in the City Hall Council Chambers, 604 West Fairmont
Parkway, La Porte, Texas, beginning at 5:30 pm to consider the following items of business.
1. CALL TO ORDER
2. CITIZEN COMMENT (Generallylimited to five minutes per person; in accordance idth state law, the time
may be reduced if there is a high number of speakers or other considerations.)
3. STATUTORY AGENDA
(a) Approve minutes of the meeting held on February 10, 2020. [Chairman Martin]
(b) Presentation, discussion, and possible action in connection with receipt of a report
regarding the Harris County Flood Control District's (HCFCD) and Harris County Precinct
2's current and future plans relating to flooding in the City of La Porte. [Lorenzo Wingate,
Assistant Director of Public Works]
(c) Presentation, discussion, and possible action regarding the Bayside Terrace Subdivision
Improvements Project. [Lorenzo Wingate, Assistant Director of Public Works]
(d) Presentation, discussion, and possible action regarding the status of current drainage
projects. [Lorenzo Wingate, Assistant Director of Public Works]
(e) Presentation, discussion, and possible action to provide staff with direction, if necessary,
regarding additional drainage concerns. [Lorenzo Wingate, Assistant Director of Public
Works]
4. SET NEXT MEETING
5. COMMITTEE COMMENIIear announcements concerning matters appearing on the agenda;
items of community interest; and/or inquiries of staff regarding specific factual information or existing
policy from the Committee members and City staff, for which no formal action will be discussed or
taken.
6. ADJOURN
If, during the course of the meeting and discussion of any items covered by this notice, the Drainage and Flooding Committee
determines that Closed or Executive Session of the Committee is required, then such closed meeting will be held as authorized
by Texas Government Code, Chapter 551, Section 551.071 - consultation with counsel on legal matters; Section 551.072 -
deliberation regarding purchase, exehange, lease or value of real property, Section 551.073 - deliberation regarding a prospective
gift; Section 551.074 - personnel matters regarding the appointment, employment, evaluation, reassignment, duties, discipline, or
dismissal of a public officer or employee; Section 551.076 - implementation of security personnel or devices; Section 551.087 -
deliberation regarding economic development negotiation; Section 551.089 - deliberation regarding security devices or security
audits, and/or other matters as authorized under the Texas Government Code. If a Closed or Executive Session is held in
accordance with the Texas Government Code as set out above, the Drainage and Flooding Committee will reconvene in Open
Session in order to take action, if necessary, on the items addressed during Executive Session.
Persons with disabilities who plan to attend this meeting and who may need auxiliary aids or services are
requested to contact the City Secretary's office (281-470-5019), two working days prior to the meeting for
appropriate arrangements.
Councilmembers may attend in numbers constituting a quorum. This is a Drainage and Flooding Committee
Meeting at which there will be no deliberation or formal action taken by City Council as a governmental body.
CERTIFICATE
I, Lee Woodward, Qty Secretary, do hereby certify that a copy of the March 9, 2020, Drainage and Flooding Committee
agenda was posted on the Qty Hall bulletin board, a place cornenient and readily accessible to the general public at all
times, and to the City's website, www.LaPorteTXgov, in compliance with Chapter 551, Texas Go\,emment Code.
DATE OF
POSTING
TIME OF
POSTING
TAKEN DOWN
Lee Woodward, City Secretary
JAY MA RTI N
Chairman
DANNY EARP
Vice -Chairman
CHUCK ENGELKEN
Member
STEVE GILLETT
Alternate Member
MINUTES OF THE DRAINAGE AND FLOODING COMMITTEE MEETING
FEBRUARY 10, 2020
The Drainage and Flooding Committee of the City of La Porte met on Monday, February 10, 2020, at the City Hall
Council Chambers, 604 West Fairmont Parkway, La Porte, Texas, at 5:00 p.m. to consider the following items of
business:
Committee Members present: Jay Martin, Chuck Engelken, Danny Earp, (Alternate Gillett available if needed)
Committee Members absent: None
Council -appointed officers present: Corby Alexander, City Manager; Lee Woodward, City Secretary
CALL TO ORDER - Chairman Martin called the meetina to order at 5:00 o.m.
2. CITIZEN COMMENT (Generally limited to five minutes per person, in accordance with state law, the time may be reduced
if there is a high number of speakers or other considerations.
Kevin Lewis spoke about issues in the watershed around his home in Bay Harbor.
3. STATUTORY AGENDA
(a) Approve minutes of the meeting held on January 13, 2020. [Chairman Martin]
Committee member Engelken moved to approve the minutes; the motion was adopted, 3-0.
(b) Presentation, discussion, and possible in connection with receipt of a report regarding the Harris County
Flood Control District's (HCFCD) and Harris County Precinct 2's current and future plans relating to
flooding in the City of La Porte. [Lorenzo Wingate, Assistant Director of Public Works]
Mr. Wingate said he expected there would be HCFCD action by March.
(c) Presentation, discussion, and possible action regarding the Bayside Terrace Subdivision Improvements
Project. [Lorenzo Wingate, Assistant Director of Public Works]
Mr. Wingate provided a proposal for engineering services regarding the Bayside Terrace Subdivision from Halff
Associates, chosen via RFQ and expected to be on the February 24 City Council agenda.
(d) Presentation, discussion, and possible action regarding the status of current drainage projects. [Lorenzo
Wingate, Assistant Director of Public Works]
Mr. Lewis was allowed to speak about the experience in his neighborhood. Mr. Wingate reported on the work being
done and Chairman Martin let Mr. Lewis know that there would be an update at next month's meeting. Committee
Member Earp requested an update on the desilting for the Lomax/F101 area. Ray Mayo, Public Works Director,
said work was being done on approximately 2000' of ditch at the airport.
(e) Presentation, discussion, and possible action to provide staff with direction, if necessary, regarding
additional drainage concerns. [Lorenzo Wingate, Assistant Director of Public Works]
February 10, 2020 - Drainage and Flooding Committee Minutes
Committee Member Earp asked that the additional work on the north side of the airport consistently be included in
and discussed with the monthly report. Mr. Wingate said a resident had requested for F216 (Little Cedar Bayou)
from Fairmont to Broadway to be selectively cleared and desnagged, so staff was going to do a visual inspection
initially. Chairman Martin confirmed that the drainage, less detention ponds, at Morgan's Landing, was overseen by
the City and that now the development was only finishing up internal drainage, and that staff had no concerns.
4. Set next meeting - The next meeting date was set for March 9.
Committee Member Comments — There were no comments.
ADJOURN — The meeting was adjourned without objection at 5:27 p.m.
Lee Woodward, City Secretary
February 10, 2020 - Drainage and Flooding Committee Minutes
REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM
Agenda Date Requested: March 9, 2020
Requested By: Lorenzo Wingate, P.E., C.F.M.
Department: Public Works
Report i' Resolution ir" Ordinance
Exhibits: HCFCD Drainage Network Map
Appropriation
Source of Funds:
Account Number:
Amount Budgeted:
Amount Requested:
Budgeted Item:
SUMMARY
ir Yes ir No
Receive report regarding Harris County Flood Control District's (HCFCD) and Harris County
Precinct 2's current and future plans relating to flooding in the City of La Porte.
RECOMMENDED MOTION
Approved for Drainage Committee Agenda
Corby D. Alexander, City Manager
Date
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REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM
Agenda Date Requested: March 9, 2020
Requested By: Lorenzo Wingate, P.E., C.F.M.
Department: Public Works
Report i' Resolution ir" Ordinance
Exhibits: Consultant Proposal
Appropriation
Source of Funds:
Account Number:
Amount Budgeted:
Amount Requested:
Budgeted Item:
SUMMARY
ir Yes ir No
Halff Associates, Inc. prepared a proposal to provide engineering services for preliminary engineering,
final design, bidding, construction phase services for the Bayside Terrace Subdivision Improvements
Project. The proposal was presented to Council at the February 24, 2020. Staff will provide an update
on Council's decision and the current project status.
RECOMMENDED MOTION
Approved for Drainage Committee Agenda
Corby D. Alexander, City Manager
Date
January 29, 2020
Mr. Lorenzo Wingate
City Engineer
2963 N. 23rd Street
LaPorte, TX 77571
RE: Engineering Services Fee Proposal
Bayside Terrace Subdivision Drainage Improvements
Revision 3
Dear Mr. Wingate:
Halff Associates Inc. (Halff) is pleased to submit our proposal to provide engineering services for the
Bayside Terrace Subdivision Drainage Improvements project for the City of La Porte. The purpose of the
project is to increase capacity and address existing flooding issues within the subdivision by regrading
roadside ditches and upsizing the existing storm sewer system. The project area is generally bounded by
Pine Bluff Drive to the north, S. Broadway Street to the west, Dwire Drive to the south, and the San
Jacinto Bay to the east. This proposal will address development of a preliminary engineering report
(PER), final design plans, and construction phase services. Additional services include geotechnical
analysis and environmental analysis.
In the PER, Halff will analyze existing conditions and evaluate proposed alternatives to recommend the
most feasible design based on various factors including estimated construction cost, available right-of-
way and easements, constructability, conflicts with existing utilities, and inconvenience to residents.
Alternatives will be presented to the City of La Porte for determination and approval of the final design.
The purpose of the final design phase is to develop signed and sealed construction plans based upon
findings in the PER.
Existing Conditions:
There are approximately 227 total structures within the "At -Risk" project area, including 206 residential
homes and 21 commercial structures. All 227 structures exist within a FEMA designated Special Flood
Hazard Area. Approximately 17 structures were damaged from Hurricane Harvey in 2017, resulting in
over $1.1 million dollars in damages.
The existing stormwater collection system is comprised of roadside ditches and underground reinforced
box culvert storm sewer to convey flow to two outfall points: an underground collection system along
Bayside Drive at the center of the subdivision, and a secondary collection system running along the
southeastern boundary of the subdivision. Both outfalls terminate at San Jacinto Bay. Access to the
southeastern collection system is limited; the system is located within fenced -in backyards of properties
within the subdivision and does not exist within a utility easement nor public right-of-way.
During intense rainfall events, the capacity of the southern system is exceeded, and the backwater
condition inundates sections of the neighborhood upstream.
'KK: 11SNORTH, `GI1 L D ➢E"L (9361) R5616832 WJVVVH/tIfu,'W
p[,;:O ditQ I_ IX /1 (:r7..J..,i"01 FAX E 6i T56... W4Z,3
f ILII 4'
r
Mr.. Lorenzo WC ingate
City of La Porte
January 29, 2020
Revision 3
Page 2
Proposed Conditions:
Based on 1D hydrologic and hydraulic modeling efforts, Halff will determine and evaluate cost-effective
solutions to provide relief to drainage areas within the neighborhood. Modifications may include
roadside ditch regrading and upsizing the existing storm sewer system to increase its capacity.
The basic services are divided into the following tasks:
Basic Services
1. Preliminary Engineering Report
2. Design Phase Services
3. Construction Phase Services
Total Basic Services:
Additional Services:
4. Geotechnical Analysis
5. Environmental Analysis
Total Additional Services:
$ 29,844.00 (Lump Sum)
$ 192,297.00 (Lump Sum)
$ 10,242.00 (Lump Sum)
$ 232,383.00
$ 10,000.00 (Lump Sum)
$ 10,000.00 (Lump Sum)
$ 20, 000.00
Total Basic & Additional Services: $ 252,383.00
Line items are intended to be authorized and released contingent on available funding.
We appreciate the opportunity to be of service to you and the City of La Porte. Please feel free to contact
me if you have any questions or comments concerning this proposal.
Sincerely,
Halff Associates, Inc.
Long Nguyen, P.E.
Public Works Team Leader
Attachments:
Attachment "A": Detailed scope of services
Attachment "B": Detailed level of effort
Attachment "C": Vicinity map
Attachment "D": Project schedule
Cc. File
Approved by:
Corby D. Alexander
City Manager
111
Mx. Lorenzo Wingatemom CiLv of La Porte
MAN HALFFJanuary 29, 2020
Revision 3
Page 3
Attachment "A"
The purpose of this proposal is to develop a PER, final design plans, and construction phase services for
the Bayside Terrace Subdivision Drainage Improvements project. The proposed project area can be seen
in Attachment "C".
SCOPE OF SERVICES
Preliminary Design Phase Services:
Task 1 — Preliminary Engineering Report (PER)
The Preliminary Engineering Report will summarize findings from the drainage analysis and present
alternative options to the City of La Porte for their approval. The PER may consider presenting the
project in multiple phases based upon available funding. Preliminary Engineering Report services
include:
a) Reviewing all available record drawings and drainage reports to determine potential utility
conflicts and constraints.
b) Performing existing conditions hydrologic analysis and delineate existing drainage basins to
determine drainage boundaries, flowrates, and outfall locations. Existing conditions hydraulic
analysis will quantify water surface elevations of roadside ditches.
c) Evaluating three proposed alternatives:
• Concrete or asphalt with curb and gutter/storm sewer
• Concrete or asphalt with roadside ditch system
• Concrete or asphalt with combination storm sewer and roadside ditch system
d) Providing estimated construction costs for each alternative developed.
e) Providing provide a final recommendation to the City of La Porte for their approval in the form of
a report.
f) Prepare presentation and attend Drainage Committee meeting to present findings and
recommendations.
Final Design Services:
Task 2 - Topographic Survey
Topographic survey will be delivered in AutoCAD Civil 3D format with field notes and ASCII files of all
points obtained. A DTM will be created to generate 1 -foot contours.
a) Full topographic survey from ROW to ROW with cross-sections at 100 -ft intervals, including: all
existing appurtenances, water meters, valves, valve boxes, fire hydrants, improvements within the
ROW (landscaping, mailboxes, etc.), trees, driveways, storm and sanitary flowlines, ditch and
culvert flowlines, pipe sizes and materials, power poles, fences, etc. Obtain private utility records
and incorporate into base drawing. Delineate public ROW based on land property monuments and
deed records. Provide RPLS signed and sealed survey control maps in PDF format
Task 3- Project Management for Final Design
Project management services include:
a) Project progress meetings, design review meetings, and conference calls
b) Project site visits
c) Coordination and communication with private utility owners to resolve conflicts
Task 4: Civil Design Services
Mr. Lorenzo Wingate
CiLy of La Porte
January 29, 2020
Revision 3
Page 4
All design work will be completed using AutoCAD Civil 3D and will adhere to City of La Porte standards
found in Chapter 5 of the PICM Stormwater Design Criteria Manual. Plans, specifications, and estimates
will be submitted in three phases: 60%, 90%, and final. The drainage design will be based upon decisions
approved by the City of La Porte in the PER phase. Civil design services include:
a) Development of general project drawings: cover sheet, sheet index, legend, general notes, existing
and proposed typical sections, and project layouts
b) Development of paving and drainage, and utility drawings: utility plan and profiles and
paving/drainage plan and profiles. Paving and drainage plan and profile sheets will contain all
roadway design and drainage design, including ditches, storm sewer, and cross culverts. Utility
plan and profiles will contain proposed water line and all related appurtenances.
c) Development of miscellaneous drawings: drainage area maps, hydraulic computations, SWPPP
layouts, traffic control plans, traffic control details; modification of City of La Porte water line
details, SWPPP details, and storm sewer details as needed.
d) Preparation of engineer's estimate of probable construction cost at each submittal. Quantities will
be verified prior to each submittal. Halff will prepare the cost estimate and quantities using City
of La Porte pay items and specifications.
e) Assist with preparation of project manual including applicable technical specifications, general
provisions, special specifications, and bid items with each submittal. The City of La Porte will
provide front end documents.
Task 5: Bid Phase Services
a) Attendance at the pre-bid meeting and compilation of notes for distribution.
b) Preparation of pre-bid responses and responding to questions.
c) Attendance at the bid review meeting and providing input on the selection process.
d) Preparation of bid recommendation letter and bid tabulation summary.
Construction Phase Services
Task 6: Construction Phase Services
a) Responding to submittals as requested by the City of La Porte
b) Responding to RFI as requested by the City of La Porte
c) Design changes/plan revisions as requested by the City of La Porte
d) Preparation of record drawings, maintenance of RFI and submittal log
IIIMx. Lorenzo Wingate
momCiLv of La Porte
MAN HALFFJanuary 29, 2020
Revision 3
Page
Additional Services:
Task 7: Geotechnical Analysis
a) Geotechnical analysis services include: evaluating the soil and groundwater conditions along the
project alignment and providing geotechnical recommendations for proposed utility construction.
Pavement recommendations will also be provided.
Task 8: Environmental
a) Prepare a desktop environmental constraints analysis to provide supporting documentation for and
complete the EHP Checklist. This does not include agency coordination or consultation, permitting,
or NEPA environmental document preparation and clearance.
Services Not Included:
• Reviewing change orders or pay estimates
• Level of service verification in modeling efforts
• Construction staking
• Analysis of detention facilities
List of Assumptions:
All consultant fees shown on are considered to be lump sum unless otherwise noted.
The City of La Porte will provide any procedures, policies, data collection systems, engineering
guidelines, standards, and design criteria that will be required for this project.
The City of La Porte will retain ownership of any deliverables and electronic files created for this
project but will not be supplied with software applications or licenses as part of this project.
The scope of services does not include any preparation or attendance at any public meetings
pertaining to the project design or construction.
Draft - For Review
Attachment "B"
Bayside Terrace Subdivision Drainage Improvements
Date: 11/27/2019
Revision 1: 1/20/2020
Revision 2: 1/27/2020
Principal /
Senior CADD
Managing
Project Manager
Project
Engineer
Technician
Admin
Revision 3: 1/29/2020
Director
Total Hours
Total Cost
HOURLY RATE
$ 210
$ 165
$
114
$ 75
$ 60
ITEM 1: PRELIMINARY DESIGN PHASE SERVICES:
Task 1 — Preliminary Engineering Report
1.A Review record drawings and drainage reports
2
8
$
1,242
1.13 Existing Conditions Hydraulics and Hydrology
8
40
$
5,880
1.0 Proposed conditions analysis
16
40
$
7,200
1.D Develop alternative and estimated construction costs
8
40
$
5,880
1.E Preliminary Engineering Report
1
16
40
$
7,410
15 Prepare presentation and attend Drainage Committee meeting to present findings and recommendations
8
8
$
2,232
Subtotal Hours
1
58
176
0
0
Subtotal Fee
$ 210
$ 9,570
$
20,064
$ -
$
29,844
TOTAL FEES: PRELIMINARY DESIGN PHASE SERVICES:
$
29,844
ITEM 2: FINAL DESIGN SERVICES:
Task 2 — Topographic Survey Services
2.A Topographic Survey of Project Area
$
51,000
Subtotal Hours
Subtotal Fee
$ -
$ - $
-
$ -
$
51,000
Task 3 — Project Management
3.A Project Progress Meetings
8
8
$
2,232
3.13 Project Site Visits
8
8
$
2,232
3.0 Coordination with private utilities
8
$
1,320
Subtotal Hours
0
24
16
Subtotal Fee
$ -
$ 3,960 $
1,824
$
5,784
Task 4 - Civil Design Services
4.A General Project Drawings
Title Page
1
2
2
5
$
543
Index of Sheets
1
2
2
5
$
543
Legend & Abbreviations
1
2
2
5
$
543
General Notes
1
2
2
5
$
543
Existing and Proposed Typical Sections
1
4
12
17
$
1,521
Project Layouts
1
4
12
17
$
1,521
4.13 Plan and Profile Drawings
Paving and Drainage Plan and Profiles (approximately 28 sheets)
4
56
160
360
580
$
55,320
Utility Plan and Profiles (approximately 28 sheets)
4
56
160
360
580
$
55,320
1/29/2020 Page 1 of 1
Bayside Terrace
1:\34000s\34805\Prospect\001\Admin\Contracts\
Bayside Terrace Subdivision Drainage Improvements LOE R3.xlsx
Draft - For Review
Attachment "B"
Bayside Terrace Subdivision Drainage Improvements
Date: 11/27/2019
Revision 1: 1/20/2020
Revision 2: 1/27/2020
Principal /
Senior CADD
Managing
Project Manager
Project
Engineer
Technician
Admin
Revision 3: 1/29/2020
Director
Total Hours
Total Cost
HOURLY RATE
$ 210
$ 165
$
114
$
75
$ 60
4.0 Miscellaneous Drawings
Drainage Area Maps
2
12
16
30
$
2,898
Traffic Control Plan
2
12
24
38
$
3,498
Traffic Control Details
2
4
4
10
$
1,086
SWPPP Layout
2
12
16
30
$
2,898
Modifcation of SWPPP Details
1
2
4
7
$
693
Modifcation of Water Line Details
1
2
4
7
$
693
Modifcation of Storm Sewer Details
1
2
4
7
$
693
4.D Estimate of Probable Construction (60%, 90%, and Final)
4
16
20
$
2,484
4.E Technical Specifications/Project Manual (60%, 90%, and Final)
4
16
20
$
2,484
Subtotal Hours
8
137
414
824
1383
Subtotal Fee
$ 1,680
$ 22,605
$
47,196
$
61,800
$
133,281
Task 5: Bid Phase Services
5.A Attend pre-bid meeting & compile notes
2
2
4
$
558
5.13 Prepare pre-bid responses & respond to questions
2
2
4
$
558
5.0 Attend bid review meeting
2
2
4
$
558
5.D Prepare bid recommendation letter & bid tabulation
2
2
4
$
558
Subtotal Hours
0
8
8
0
16
Subtotal Fee
$ -
$ 1,320
$
912
$
-
$
2,232
TOTAL FEES: FINAL DESIGN SERVICES
$
192,297
ITEM 3: CONSTRUCTION PHASE SERVICES:
Task 6: Construction Phase Services
6.A Respond to submittals
2
16
18
$
2,154
6.13 Respond to RFI"
8
8
$
1,320
6.0 Revisions
4
16.
20
$
2,484
6.D Preparation of Record Drawings, RFI Log, and Submittal Log
4
16
24
44
$
4,284
Subtotal Hours
0
18
48
24
90
Subtotal Fee
$ -
$ 2,970
$
5,472
$
1,800
$
10,242
TOTAL FEES: CONSTRUCTION PHASE SERVICES
$
10,242
TOTAL FEES: PER, FINAL DESIGN, & CONSTRUCTION PHASE
$
232,383
1/29/2020 Page 1 of 1
Bayside Terrace
1:\34000s\34805\Prospect\001\Admin\Contracts\
Bayside Terrace Subdivision Drainage Improvements LOE R3.xlsx
Draft - For Review
Attachment "B"
Bayside Terrace Subdivision Drainage Improvements
Date: 11/27/2019
Revision 1: 1/20/2020
Revision 2: 1/27/2020
Principal /
Senior CADD
Managing
Project Manager Project Engineer
Technician
Admin
Revision 3: 1/29/2020
Director
Total Hours
Total Cost
HOURLY RATE
$
210
$ 165
$ 114
$ 75
$ 60
ADDITIONAL SERVICES:
Task 7: Geotechnical Analysis
7.A Geotechnical Analysis
$
10,000
Subtotal Hours
0
0 0
0
0
Subtotal Fee
$
-
$ - $ -
$ -
$
10,000
Task 8: Environmental Analysis
8.A Environmental Analysis
$
10,000
Subtotal Hours
0
0 0
0
0
Subtotal Fee
$
-
$ - $ -
$ -
$
10,000
TOTAL FEES: ADDITIONAL SERVICES
$
20,000
ITUTAL FEES: > FINAL DESIGN, C0111
SE SERVICES, AND
$
252 383
1/29/2020 Page 1 of 1
Bayside Terrace
1:\34000s\34805\Prospect\001\Admin\Contracts\
Bayside Terrace Subdivision Drainage Improvements LOE R3.xlsx
1 11111111
��,�3ays���de a ce
Plan Duration I Actual Start % Complete Actual (beyond plan) %Complete (beyond plan
ACTIVITY IPLAIN STAIRT IRATI
WEEKS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
ffata �o 11-ection -
and Review 1 2
Developing and
Modeling 3 6
I
and Submittal 9 4
Surveying 10 6
Geotechnical
Investigation 10 8
Environmental
Permitting 10 8
Final Design 16 24
Bid Phase
Services 40 4
Construction
Phase Services 44 52
REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM
Agenda Date Requested: March 9, 2020
Requested By: Lorenzo Wingate, P.E., C.F.M.
Department: Public Works
Report i ' Resolution i ' Ordinance
Exhibits: Project map
Project update chart
Harris County Drainage Network Map
Airport Drainage Improvements
Appropriation
Source of Funds:
Account Number:
Amount Budgeted:
Amount Requested:
Budgeted Item: ir Yes ir' No
SUMMARY
Refer to attached exhibit(s) for updates on various drainage projects throughout the
City.
RECOMMENDED MOTION
Approved for Drainage Committee Agenda
Corby D. Alexander, City Manager
Date
The City of La Porte Drainage Projects 2019
N
NUM BER PROJECT
1 Brookglen Flooding Mitigation Analysis
2 Bayside Terrace Drainage Improvements
3 Lomax/F101-03-00 Drainage Channel Feasibility Study
4 Little Cedar Bayou F216 Phase III Improvement
5 6th Street Madison to Main Paving and Drainage
6 8th & D Storm Water Conveyance Improvements
7 Bob's Gully
8 Little Cedar Bayou F216 Phase II Improvements
9 Coupland Drive
10 Airport On-site Drainage Improvements
R6
0 0.5 1 2 Miles
�mm
DRAINAGE PROJECTS
COLP
PROJECT
PROJECT PHASE (Feasibility/Preliminary
Potential Grant
Potential COLP
Estimated
On
NO.
PROJECT
DESCRIPTION
Status
Budgeted
°k Complete
MANAGER
Design/Final Design/Bidding/Construction)
Funding
Cost Share
Completion Date
Schedule
Amount
The 2009 City-wide Drainage Study identifies the Brookglen subdivision as an area with
Staff working with HCFCD to develop regional solution. HCFCD
Brookglen Flooding
significant drainage/flooding problems, attributed to a mixture of inadequate sewerage
insufficient the B112-00-00 Channel. Compounded
currently finalizing Technical Update. Staff submitted HMGP grant
1
Public Works
and channel capacity within
Feasibilityapplication
for supplemental funding on October 17, 2018.
$4,000,021.50
$1,000,005.38
$275,000.00
March 2022
10%
No
Mitigation Analysis
improvements recommended within the City-wide Drainage Study could reduce the flood
Application pending TDEM selection. Awarded projects are
risk within the Brookglen area. This analysis would expand upon the recommendations
anticipated to begin as early as January 2020.
provided within 2009 study.
Approximately 800 linear feet of RCP pipe, ranging in size from 15" to 24", exists within
the Bayside Terrance Subdivision, which has not been properly maintained due to access
issues attributed to limited access to infrastructure, provided within a five foot utility
Bayside Terrace
easement. Portions of Hamilton Street and Fondren Street utilize this system to convey
Staff submitted HMGP grant application for supplemental funding on
2
Drainage
Public Works
stormwater to its outfall point of Galveston Bay. The system fails to function properly,
Feasibility
November 26, 2018. Application pending TDEM selection. Awarded
$2,200,000.00
$550,000.00
$100,000.00
March 2022
0%
No
Improvements
causing flooding within the adjacent portion(s) of the subdivision. A proposed drainage
projects are anticipated to begin as early as January 2020.
study would discuss feasibility of rerouting this flows from the 800 feet of RCP, towards
Bayside Dr. and utilizing the existing system within Bayside Dr. to convey the storm water
within the existing system.
Harris County Flood Control District's (HCFCD) F101-06-00 Channel system conveys
Staff submitted HMGP grant application for supplemental funding on
storm water runoff from the Lomax area and ultimately outfalls into Lower San Jacinto
November 26, 2018. Application pending TDEM selection. Awarded
Loma)dF101-03-00
Bay. The downstream section of the channel has been improved to ultimate capacity. An
projects are anticipated to begin as early as January 2020. HCFCD
3
Drainage Channel
Public Works
existing pipeline corridor, containing several pipelines located at depths ranging from
Feasibility
has completed Technical Update and is in procurement phase for
$3,200,155.00
$800,038.75
$150,000.00
March 2022
10%
No
Improvements
approximately 2' to 18', cross the channel, limiting the depth of potential channel
PER. Request to award engineering contract is anticipated to be
improvements. Moderate/heavy rain events, compounded with backwater conditions from
placed on Januray 2020 Commissioner's Court meeting agenda by
this section of the channel, contributes to wide -spread flooding within the Lomax Area.
HCFCD.
Phase I and Phase II Improvements to Little Cedar Bayou, from Hwy 146 to Madison,
have either been completed or are currently awarded for construction. Phase I and Phase
11 improvements include, but are not limited to, excavating and disposing off- site soil as
required for the new channel alignment, clearing and grubbing, demolition of existing
structures, erosion control, and site restoration for approximately 5,533 LF of channel.
Approximately 4,680 LF of channel remains unimproved upstream, with those
improvements slated to be included within this project, to be considered Phase 111. Survey
Staff submitted HMGP grant application for supplemental funding on
Little Cedar Bayou
Y
data has been collected on this most upstream section. Routine maintenance of clearing
trees,
December 20, 2018. Application pending TDEM selection. Awarded
4
F216 Phase III
Public Works
overgrowth, and obstructions; minor erosion control and slope stabilization; and
desilting is planned to maintain existing conveyance capacity. Those maintenance
Feasibility
projects are anticipated to begin as early as January 2020. Staff has
$2,500,000.00
$625,000.00
$825,000.00
March 2022
0%
No
Improvements
operations are projected to begin late 4th quarter 2018 or earl 1st quarter 2019 calendar
p p l 9 q Y q (
requested a budgetary proposal from consultant for Phase III
year).
improvements, including consideration of H Street drainage issue.
Proposal expected week of Thanksgiving 2019.
The following Phase III mitigation action is proposed, as recommended within the
Hydraulic Analysis for Little Cedar Bayou Watershed HCFCD Unit F216-00-00: lowering
the flow line of the Bayou 1 - 2 feet, from W. Madison to Sens Rd. Current channel side
slopes would be modified to achieve 3:1 side slopes from W Madison St. to Sens Rd. An
estimated 200,000 cubic yards are to be excavated from the channel. Over excavation is
provided to yield sufficient storage volume in the pond after siltation and build-up in the
pond bottom.
The segment of 6th St from W. Madison St to W. Main St is considered part of Old La
Executed contract with GLO effective March 9, through
6th Street Madison t0
Porte, which was generally noted in the City -Wide Drainage Study as not having sufficient
August 5, 2021. Consultant discussed preliminary modeling results
5
Main Paving and
Public Works
storm sewer capacity due to undersized storm sewer, undersized storm inlets, or not
Feasibility
with staff 10/28/2019. Consultant proceeding with finalizing draft
$3,798,532.30
$125,000.00
$1,140,000.00
August 2021
3%
Yes
Drainage
9
enough storm inlets. RPS -Klotz provided an analysis of the existing storm sewer system
to
of PER. Staff received preliminary draft agreement for review from
and identified problem areas within the project limits. Additional analysis is required to
Harris County for $3.4M allocation on 10/25/2019.
determine most efficient improvement alternative.
8th & D Storm Water
The area generally bounded by 8th Street to the west, Main Street to the north, 5th Street
6
Conveyance
Public Works
to the east, and D Street to the south experiences flooding during heavy rain events due
Preliminary Design
This project has been incorporated into the 7th Street Rehabilitation
N/A
N/A
$139, 340 / $1,850,000
lune 2021
10%
Yes
Improvements
to undersized culverts within the area. Increasing culvert sizes within the area will provide
additional conveyance capacity within the existing open ditch system.
Project. Survey and PER authorized by council on June 10, 2019.
Obtained drainage easement along East B Street ROW in Morgan's Point from Boys and
7
Bob's Gully
Public Works
Girls Harbor. Coordinate with Harris County Flood Control & the Army Corp of Engineers
Feasibility
Analysis completed. Concluded that existing channel has capacity
N/A
N/A
$50,000.00
September 2019
95%
Yes
to determine maintenance responsibilities. Consultant to provide technical memo
for current conditions.
analyzing channel capacity.
A proposed conditions hydraulic model was developed during the preliminary design for
the N P Street Culvert Improvement Project, which recommended replacing the upstream
portion of the existing composite structure at N P Street, with structures matching the
downstream portion of the composite structure. That project allows for full utilization of the
structure's capacity, as well as protect the channel during rainfall events that produce
Battleground Estates
higher amounts of runoff. Per the recommendations of the Phase 1 report, a more
detailed Phase 2 engineering analysis of segments F101-00-00 and F101-08-00, that are
Staff submitted HMGP grant application for supplemental funding on
$
Phase II
Public Works
upstream of N P Street, as well as an evaluation of the roadside ditch drainage conduits
Feasibility
December 20, 2018. Project is on hold; awaiting supplemental grant
$880,500.00
$220,125.00
$65,000.00
August 2022
0%
No
within Battleground Estates should be performed to identify necessary improvements to
funding.
address structural flooding within the area. The more detailed study would evaluate the
impacts of culverts located upstream of N P Street, along F-101-00-00 resulting from the
10-, 50-, and 100 -year rain event. Channel improvements, and increasing culvert sizes to
provide sufficient capacity within culverts along the roadside ditches are the anticipated
mitigation efforts.
The proposed storm sewer improvements include re -sloping Coupland Drive to drain
towards inlets located throughout the subdivision. The inlets will drain into proposed storm
sewer ranging in size from 24" to 30" RCP. This storm sewer will then flow underneath the
existing roadside ditch along L Street to a combined outfall with the existing roadside ditch
HDR is awaiting comments from TWDB before beginning 60
9
Coupland Drive
Public Works
to Big Island Slough. The proposed storm sewer underneath the existing ditch on L Street
Preliminary Design
design. Construction to be incorporated into Lomax Lift Station
N/A
N/A
$1,110,000.00
July 2022
30%
Yes
will be 42" RCP and the combined outfall will need to be a 60" RCP. These improvements
Consolidation Project.
will result in no net fill within the Big Island Slough 100 -year floodplain. The proposed
storm sewer was sized for the 5 year storm event, per the City of La Porte drainage
criteria.
CO
PROJECT
PROJECT PHASE (Feasibility/Preliminary
Potential Grant
Potential COLP
Estimated
On
NO.
PROJECT
DESCRIPTION
Status
Budgetet ed
°k Complete
MANAGER
Design/Final Design/Bidding/Construction)
Funding
Cost Share
Completion Date
Schedule
Amount
Airport On-Site
On-site and offsite study determined there is no impact from airport drainage run off to the
10
Drainage
Public Works
area north(Lomax) of the airport. The study determined there is impact to the Glen
Bidding
Design phase has been completed. Bid opening held August 29,
$2,200,000.00
$244,500.00
$248,467.00
March 2020
0%
Yes
Improvements
Meadows Subdivision. Onsite detention and increased capacity will be designed to
mitigate the impact on Glen Meadows.
01
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Concentrotior �� LA PORTE
`� \\ AIRPORT j
\ ����•,
ez5Ci
> 1
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�E TOTAL FLOW LIMITED BY DITCH CAPACITY OF 33.9 C.FS.-1-�L�1-_L i
SPENCER HWY.
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B3I
SYSTEM "8C" 831 826
SEE INSERT "A" SEE INSERT "A"
t �
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N
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N
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Z W
J z
T J
U =
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�l_ ._ STATE DEPARTMENT OF HIGHWAYS
?1E Tfk
AND PUBUC TRANSPORTATION
SPENCER HIGHWAY
w. a
a DRAINAGE SYSTEM MAPS
STA. 615+00 TO STA. 625+09.82
71 SHEET 15 OF 25
FEDERAL AID PROJECT NO. S� '
6 c� n � emfr e- at
SCALE - r• 50' sT�TE " couNr
r�� TUNS 12 HARRIS
mMrur.i CONT. SECT. JOB 40400 NO.
snrrw"rrrrr�rr..�..w.w 8020 12 011 MH
- rrerrueoa
Drainage Areas "C" Foelo► Ruin Time of Tolal
Taol Intensity Flow
Paved Commer " Unimpror. CA
Frequency (In./Mr.) (CFS) Flow
No. Acres 0.90 Obs 0.35 (Years) (Mm.) (CFS)
825 180.00 _ 180.00 63.00 2 41 3.03 191.00 33.9;E
B26 2.07 2.0T 0.72 2 10 6.76 4.90 4.90
827A 0.27 0.2T 0.24 2 10 6.76 1.62 3.T2
8278 0.48 0.48 0.31 2 10 6.76 2.10
829A 0.48 0.48 0.43 2 f0 6.76 2.91 6.90
B29B 0.91 0.91 0.59 2 !0 6.76 3.99
B 31 7.15 7.I S 2.50 2 10 6.76 16.90 16.90
B32A 0.40 0.40 0.36 2 10 6.76 2.43 5.81
8328 0.77 0.77 0.50 2 10 6.76 3.38
Drainage Areas "C" Factor Total Ram Time of Tao!
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.
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6.69
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(Mirk)
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0.2T
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2
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6.76
1.62
8288
0.82
0.82
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11
0 400 800
Feet
Structure Type
Circular Pipe
Box Culvert
Ditch
Improved Culvert
Lowered Ditch
111111 Irttti Linear Detention
Widened Ditch
City of La Porte
La Porte Municipal Airport
Storm Water Drainage Improvements
Exhibit 9
Proposed Drainage
Improvements
EJ V ALIGN-SWALE-11
W „
N=13815129.48
„
E=3220114.65
"'.. ALIGN-SWALE-07
ALIGN-SWALE-08 ALIGN-SWALE-08 ALIGN-SWALE-11
„
N=13814985.51 N=13815067.05 N=13815103.43 N=13815150.02
E=3218434.51 E=3219391.82 E=3220086.90 E=3220411.24
J EJ_I j�] � —1 Cj =1
ALIGN-SWALE-05
N=13814703.45
E=3217077.20
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99
NOTES
1. FOR SURVEY CONTROLS (SEE SHEET G-003)
2. THE CONTRACTOR MUST MAINTAIN POSITIVE
DRAINAGE AND AVOID ANY STANDING WATER
DURING CONSTRUCTIONS.
3. THE CONTRACTOR MUST MAINTAIN PORTABLE
STORMWATER PUMP AVAILABLE ON-SITE ALL TIME
TO REMOVE ANY STANDING WATER NOT DRAINED
BY GRAVITY.
4. THE CONTRACTOR MUST EXERCISE CAUTION
WHILE EXCAVATING AND NOT DAMAGE ANY
UNDERGROUND UTILITIES.
5. THE SIDE SLOPES SHOULD NOT BE STEEPER
THAN 3:1 SLOPES.
PROP DITCH
Exist Natural Grade VARIES
3 L�
1
71 VARIES
TYPICAL PROPOSED
SWALE
—ALIGN-SWALE-10
N=13812875.58
E=3220565.32 Existin
Ditch
Exist Natural Grade PROP DITCHVARIES
U)
3L \`>
1
CLEANOUT EXISTING CULVERT
TO RE-ESTABLISH POSITIVE
DRAINAGE INTO EXISTING DITCH
TYPICAL REGRADING
DITCH
REGRADING SOME DITCHES
AND SWALES IS NOT A PART
OF THIS CONTACT. IT WILL
BE A SEPARATE CONTRACT.
FOR BIDDING: 06/03/19
REVISIONS
oomov®gn
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......................
o NAWA RAJ PANTHI �
............
o 103690
4
eflufl�ONAL Ela
W HT&J ♦ LLC
10351 STELLA LINK RD
HOUSTON, TEXAS 77025
(0) (832) 767-0090
TBPE FIRM No. F-14087
Professional n in rs
TEXAS FIRM F-18997
LA PORTE MUNICIPAL
AIRPORT
AIRFIELD PAVEMENT
REHABILITATION
AND DRAINAGE
IMPROVEMENTS
2019
PROJ MGR
Panthi
DRAWN BY
Murphree
CHECKED BY
Panthi
PROJ NO
1912LPRTE
CIVIL PEs PROJ NO
1712LPRTE
TITLE DRAINAGE
IMPROVEMENTS
OVERALL
EXISTING DRAINAGE
DITCHES
SHEET
C-30 1
ALIGN-SWALE-07
all
NOT IN THIS CONTRACT
30
ALIGN-SWALE-08
30
NOT IN THIS CONTRACT
30
0+00y+
1+00
2+00 3+00 4+00 5+00 6+00
7+00 8+00
9+00 10+00
11+00 12+00
13+00
24
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U
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2
2
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Professional n in rs
TEXAS FIRM F-18997
LA PORTE MUNICIPAL
AIRPORT
AIRFIELD PAVEMENT
REHABILITATION
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PROJ MGR
Panthi
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PROJ NO
1912LPRTE
CIVIL PEs PROJ NO
1712LPRTE
TITLE DRAINAGE
IMPROVEMENTS
INFIELD
DRAINAGE DITCH
(SHEET 3)
GRAPHIC SCALE SHEET
0 10 20 0 100 200 C-304
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Professional n in rs
TEXAS FIRM F-18997
LA PORTE MUNICIPAL
AIRPORT
AIRFIELD PAVEMENT
REHABILITATION
AND DRAINAGE
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2019
PROJ MGR
Panthi
DRAWN BY
Murphree
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PROJ NO
1912LPRTE
CIVIL PEs PROJ NO
1712LPRTE
TITLE DRAINAGE
IMPROVEMENTS
INFIELD
DRAINAGE DITCH
(SHEET 3)
GRAPHIC SCALE SHEET
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FOR BIDDING: 06/03/19
REVISIONS
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10351 STELLA LINK RD
HOUSTON, TEXAS 77025
(0) (832) 767-0090
TBPE FIRM No. F-14087
scion I * nineers
TEXAS FIRM F-18997
LA PORTE MUNICIPAL
AIRPORT
AIRFIELD PAVEMENT
REHABILITATION
AND DRAINAGE
IMPROVEMENTS
2019
PROJ MGR
Panthi
DRAWN BY
Murphree
CHECKED BY
Panthi
PROJ NO
1912LPRTE
CIVIL PEs PROJ NO
1712LPRTE
TITLE DRAINAGE
IMPROVEMENTS
INFIELD
DRAINAGE DITCH
(SHEET 4)
GRAPHIC SCALE SHEET
0 10 20 0 100 200 C-305
REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM
Agenda Date Requested: March 9, 2020
Requested By: Lorenzo Wingate, P.E., C.F.M.
Department: Public Works
Report i ' Resolution i ' Ordinance
Exhibits: Bay Harbor Drainage Improvements
Appropriation
Source of Funds:
Account Number:
Amount Budgeted:
Amount Requested:
Budgeted Item: ir Yes ir' No
SUMMARY
Opportunity to discuss any drainage concerns not covered by previous items.
Bay Harbor Drive to Oakhurst Follow-up
At the February 10th Drainage Committee meeting, we discussed the in-house drainage maintenance
project being performed on Bay Harbor Dr. Construction efforts are complete. See attached photos of
completed improvements. Staff initiated coordination efforts withTxDOT on February 11th, for
maintenance of the roadside ditches along Broadway. At the time of the agenda request, TxDOT was
still attempting to coordinate the requested work. Staff will provide an update to the Drainage Committee
at the time of the meeting.
RECOMMENDED MOTION
Approved for Drainage Committee Agenda
Corby D. Alexander, City Manager
Date