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DRAINAGE PROJECTS
<br />COLP
<br />PROJECT
<br />PROJECT PHASE (Feasibility/Preliminary
<br />Potential Grant
<br />Potential COLP
<br />Estimated
<br />On
<br />NO.
<br />PROJECT
<br />DESCRIPTION
<br />Status
<br />Budgeted
<br />°k Complete
<br />MANAGER
<br />Design/Final Design/Bidding/Construction)
<br />Funding
<br />Cost Share
<br />Completion Date
<br />Schedule
<br />Amount
<br />The 2009 City-wide Drainage Study identifies the Brookglen subdivision as an area with
<br />Staff working with HCFCD to develop regional solution. HCFCD
<br />Brookglen Flooding
<br />significant drainage/flooding problems, attributed to a mixture of inadequate sewerage
<br />insufficient the B112-00-00 Channel. Compounded
<br />currently finalizing Technical Update. Staff submitted HMGP grant
<br />1
<br />Public Works
<br />and channel capacity within
<br />Feasibilityapplication
<br />for supplemental funding on October 17, 2018.
<br />$4,000,021.50
<br />$1,000,005.38
<br />$275,000.00
<br />March 2022
<br />10%
<br />No
<br />Mitigation Analysis
<br />improvements recommended within the City-wide Drainage Study could reduce the flood
<br />Application pending TDEM selection. Awarded projects are
<br />risk within the Brookglen area. This analysis would expand upon the recommendations
<br />anticipated to begin as early as January 2020.
<br />provided within 2009 study.
<br />Approximately 800 linear feet of RCP pipe, ranging in size from 15" to 24", exists within
<br />the Bayside Terrance Subdivision, which has not been properly maintained due to access
<br />issues attributed to limited access to infrastructure, provided within a five foot utility
<br />Bayside Terrace
<br />easement. Portions of Hamilton Street and Fondren Street utilize this system to convey
<br />Staff submitted HMGP grant application for supplemental funding on
<br />2
<br />Drainage
<br />Public Works
<br />stormwater to its outfall point of Galveston Bay. The system fails to function properly,
<br />Feasibility
<br />November 26, 2018. Application pending TDEM selection. Awarded
<br />$2,200,000.00
<br />$550,000.00
<br />$100,000.00
<br />March 2022
<br />0%
<br />No
<br />Improvements
<br />causing flooding within the adjacent portion(s) of the subdivision. A proposed drainage
<br />projects are anticipated to begin as early as January 2020.
<br />study would discuss feasibility of rerouting this flows from the 800 feet of RCP, towards
<br />Bayside Dr. and utilizing the existing system within Bayside Dr. to convey the storm water
<br />within the existing system.
<br />Harris County Flood Control District's (HCFCD) F101-06-00 Channel system conveys
<br />Staff submitted HMGP grant application for supplemental funding on
<br />storm water runoff from the Lomax area and ultimately outfalls into Lower San Jacinto
<br />November 26, 2018. Application pending TDEM selection. Awarded
<br />Loma)dF101-03-00
<br />Bay. The downstream section of the channel has been improved to ultimate capacity. An
<br />projects are anticipated to begin as early as January 2020. HCFCD
<br />3
<br />Drainage Channel
<br />Public Works
<br />existing pipeline corridor, containing several pipelines located at depths ranging from
<br />Feasibility
<br />has completed Technical Update and is in procurement phase for
<br />$3,200,155.00
<br />$800,038.75
<br />$150,000.00
<br />March 2022
<br />10%
<br />No
<br />Improvements
<br />approximately 2' to 18', cross the channel, limiting the depth of potential channel
<br />PER. Request to award engineering contract is anticipated to be
<br />improvements. Moderate/heavy rain events, compounded with backwater conditions from
<br />placed on Januray 2020 Commissioner's Court meeting agenda by
<br />this section of the channel, contributes to wide -spread flooding within the Lomax Area.
<br />HCFCD.
<br />Phase I and Phase II Improvements to Little Cedar Bayou, from Hwy 146 to Madison,
<br />have either been completed or are currently awarded for construction. Phase I and Phase
<br />11 improvements include, but are not limited to, excavating and disposing off- site soil as
<br />required for the new channel alignment, clearing and grubbing, demolition of existing
<br />structures, erosion control, and site restoration for approximately 5,533 LF of channel.
<br />Approximately 4,680 LF of channel remains unimproved upstream, with those
<br />improvements slated to be included within this project, to be considered Phase 111. Survey
<br />Staff submitted HMGP grant application for supplemental funding on
<br />Little Cedar Bayou
<br />Y
<br />data has been collected on this most upstream section. Routine maintenance of clearing
<br />trees,
<br />December 20, 2018. Application pending TDEM selection. Awarded
<br />4
<br />F216 Phase III
<br />Public Works
<br />overgrowth, and obstructions; minor erosion control and slope stabilization; and
<br />desilting is planned to maintain existing conveyance capacity. Those maintenance
<br />Feasibility
<br />projects are anticipated to begin as early as January 2020. Staff has
<br />$2,500,000.00
<br />$625,000.00
<br />$825,000.00
<br />March 2022
<br />0%
<br />No
<br />Improvements
<br />operations are projected to begin late 4th quarter 2018 or earl 1st quarter 2019 calendar
<br />p p l 9 q Y q (
<br />requested a budgetary proposal from consultant for Phase III
<br />year).
<br />improvements, including consideration of H Street drainage issue.
<br />Proposal expected week of Thanksgiving 2019.
<br />The following Phase III mitigation action is proposed, as recommended within the
<br />Hydraulic Analysis for Little Cedar Bayou Watershed HCFCD Unit F216-00-00: lowering
<br />the flow line of the Bayou 1 - 2 feet, from W. Madison to Sens Rd. Current channel side
<br />slopes would be modified to achieve 3:1 side slopes from W Madison St. to Sens Rd. An
<br />estimated 200,000 cubic yards are to be excavated from the channel. Over excavation is
<br />provided to yield sufficient storage volume in the pond after siltation and build-up in the
<br />pond bottom.
<br />The segment of 6th St from W. Madison St to W. Main St is considered part of Old La
<br />Executed contract with GLO effective March 9, through
<br />6th Street Madison t0
<br />Porte, which was generally noted in the City -Wide Drainage Study as not having sufficient
<br />August 5, 2021. Consultant discussed preliminary modeling results
<br />5
<br />Main Paving and
<br />Public Works
<br />storm sewer capacity due to undersized storm sewer, undersized storm inlets, or not
<br />Feasibility
<br />with staff 10/28/2019. Consultant proceeding with finalizing draft
<br />$3,798,532.30
<br />$125,000.00
<br />$1,140,000.00
<br />August 2021
<br />3%
<br />Yes
<br />Drainage
<br />9
<br />enough storm inlets. RPS -Klotz provided an analysis of the existing storm sewer system
<br />to
<br />of PER. Staff received preliminary draft agreement for review from
<br />and identified problem areas within the project limits. Additional analysis is required to
<br />Harris County for $3.4M allocation on 10/25/2019.
<br />determine most efficient improvement alternative.
<br />8th & D Storm Water
<br />The area generally bounded by 8th Street to the west, Main Street to the north, 5th Street
<br />6
<br />Conveyance
<br />Public Works
<br />to the east, and D Street to the south experiences flooding during heavy rain events due
<br />Preliminary Design
<br />This project has been incorporated into the 7th Street Rehabilitation
<br />N/A
<br />N/A
<br />$139, 340 / $1,850,000
<br />lune 2021
<br />10%
<br />Yes
<br />Improvements
<br />to undersized culverts within the area. Increasing culvert sizes within the area will provide
<br />additional conveyance capacity within the existing open ditch system.
<br />Project. Survey and PER authorized by council on June 10, 2019.
<br />Obtained drainage easement along East B Street ROW in Morgan's Point from Boys and
<br />7
<br />Bob's Gully
<br />Public Works
<br />Girls Harbor. Coordinate with Harris County Flood Control & the Army Corp of Engineers
<br />Feasibility
<br />Analysis completed. Concluded that existing channel has capacity
<br />N/A
<br />N/A
<br />$50,000.00
<br />September 2019
<br />95%
<br />Yes
<br />to determine maintenance responsibilities. Consultant to provide technical memo
<br />for current conditions.
<br />analyzing channel capacity.
<br />A proposed conditions hydraulic model was developed during the preliminary design for
<br />the N P Street Culvert Improvement Project, which recommended replacing the upstream
<br />portion of the existing composite structure at N P Street, with structures matching the
<br />downstream portion of the composite structure. That project allows for full utilization of the
<br />structure's capacity, as well as protect the channel during rainfall events that produce
<br />Battleground Estates
<br />higher amounts of runoff. Per the recommendations of the Phase 1 report, a more
<br />detailed Phase 2 engineering analysis of segments F101-00-00 and F101-08-00, that are
<br />Staff submitted HMGP grant application for supplemental funding on
<br />$
<br />Phase II
<br />Public Works
<br />upstream of N P Street, as well as an evaluation of the roadside ditch drainage conduits
<br />Feasibility
<br />December 20, 2018. Project is on hold; awaiting supplemental grant
<br />$880,500.00
<br />$220,125.00
<br />$65,000.00
<br />August 2022
<br />0%
<br />No
<br />within Battleground Estates should be performed to identify necessary improvements to
<br />funding.
<br />address structural flooding within the area. The more detailed study would evaluate the
<br />impacts of culverts located upstream of N P Street, along F-101-00-00 resulting from the
<br />10-, 50-, and 100 -year rain event. Channel improvements, and increasing culvert sizes to
<br />provide sufficient capacity within culverts along the roadside ditches are the anticipated
<br />mitigation efforts.
<br />The proposed storm sewer improvements include re -sloping Coupland Drive to drain
<br />towards inlets located throughout the subdivision. The inlets will drain into proposed storm
<br />sewer ranging in size from 24" to 30" RCP. This storm sewer will then flow underneath the
<br />existing roadside ditch along L Street to a combined outfall with the existing roadside ditch
<br />HDR is awaiting comments from TWDB before beginning 60
<br />9
<br />Coupland Drive
<br />Public Works
<br />to Big Island Slough. The proposed storm sewer underneath the existing ditch on L Street
<br />Preliminary Design
<br />design. Construction to be incorporated into Lomax Lift Station
<br />N/A
<br />N/A
<br />$1,110,000.00
<br />July 2022
<br />30%
<br />Yes
<br />will be 42" RCP and the combined outfall will need to be a 60" RCP. These improvements
<br />Consolidation Project.
<br />will result in no net fill within the Big Island Slough 100 -year floodplain. The proposed
<br />storm sewer was sized for the 5 year storm event, per the City of La Porte drainage
<br />criteria.
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