The document discusses a proposed stream restoration project along two segments of Dead Run in Fairfax County, VA, outlining the project limits, benefits of improving water quality and habitat, and providing an overview of the existing conditions and alternative approaches being considered to refine the restoration design while minimizing tree loss and impacts to properties. It also reviews regulatory drivers and estimated improvements to water quality and flood reduction from the project.
Rocky Run Tributary at Hickory Hollow Lane Stream Restoration Feb. 2021Fairfax County
The Rocky Run Tributary at Hickory Hollow Lane project goals are to stabilize the stream, reduce excess sediment from flowing downstream; improve aesthetics, reduce hazards, reconnect the stream to the floodplain, improve the riparian buffer and reduce road flooding, among other goals.
Rocky Run Tributary at Dulles Access Road Stream Restoration ProjectFairfax County
Restore up to 1,200 feet of stream within the wooded dry pond footprint.
Stabilize streambed and banks
Reduce sediment and nutrient inputs into stream
Improve habitat
Reduce long-term maintenance of pond
Consider water quality enhancements and a litter collection system in the open pond area
Maintain close coordination with stakeholders
Rabbit Branch at Collingham Drive Stream Restoration Information Meeting - Ju...Fairfax County
The goal of the stream restoration project is to build an ecologically sound restoration that balances water quality benefits with riparian function and park user experience.
Little Pimmit Run at Chesterbrook Road Stream Restoration and Sanitary Reali...Fairfax County
Chesterbrook Road Emergency Project – Summer 2019
Final Scoping Technical Memorandum – January 2020
Professional Services Contract Execution – April 2021
Community Meeting on stream restoration Pre-design/Channel alignments – April 2021
Final Preliminary Engineering Report – October 2021
Community Meeting on Sanitary Realignment Preliminary Engineering Report – October 2021
Value Engineering Study completed – November 2021
One joint study for both projects
Community Meeting with Board of Supervisor – December 2021
Community meeting – January 2022
Design Contract Development – (We are at this step)
Land Acquisition – (We are at this step)
Complete Design
Construction
Piney Run Public Meeting 1 October 17, 2018Fairfax County
This project will restore 4,300 feet of stream on Lake Werowance Inc. and privately owned properties. Goals are stabilized stream banks and bed, reduced sediment and nutrients, improved habitat, and enhanced water quality.
Huntsman Lake Dam Rehabilitation
Huntsman Lake Dredging and Restoration
Department of Public Works and Environmental Services Pardon Our Dust Meeting
Fairfax County, VA
Peyton Run at Longwood Knolls Community Meeting Oct 1, 2018Fairfax County
This project will restore up to 2,500 feet of stream on Longwood Knolls HOA and Cherry Run section 3 subdivision properties. Sediment and nutrient inputs will be reduced and habitat will be improved.
Rocky Run Tributary at Hickory Hollow Lane Stream Restoration Feb. 2021Fairfax County
The Rocky Run Tributary at Hickory Hollow Lane project goals are to stabilize the stream, reduce excess sediment from flowing downstream; improve aesthetics, reduce hazards, reconnect the stream to the floodplain, improve the riparian buffer and reduce road flooding, among other goals.
Rocky Run Tributary at Dulles Access Road Stream Restoration ProjectFairfax County
Restore up to 1,200 feet of stream within the wooded dry pond footprint.
Stabilize streambed and banks
Reduce sediment and nutrient inputs into stream
Improve habitat
Reduce long-term maintenance of pond
Consider water quality enhancements and a litter collection system in the open pond area
Maintain close coordination with stakeholders
Rabbit Branch at Collingham Drive Stream Restoration Information Meeting - Ju...Fairfax County
The goal of the stream restoration project is to build an ecologically sound restoration that balances water quality benefits with riparian function and park user experience.
Little Pimmit Run at Chesterbrook Road Stream Restoration and Sanitary Reali...Fairfax County
Chesterbrook Road Emergency Project – Summer 2019
Final Scoping Technical Memorandum – January 2020
Professional Services Contract Execution – April 2021
Community Meeting on stream restoration Pre-design/Channel alignments – April 2021
Final Preliminary Engineering Report – October 2021
Community Meeting on Sanitary Realignment Preliminary Engineering Report – October 2021
Value Engineering Study completed – November 2021
One joint study for both projects
Community Meeting with Board of Supervisor – December 2021
Community meeting – January 2022
Design Contract Development – (We are at this step)
Land Acquisition – (We are at this step)
Complete Design
Construction
Piney Run Public Meeting 1 October 17, 2018Fairfax County
This project will restore 4,300 feet of stream on Lake Werowance Inc. and privately owned properties. Goals are stabilized stream banks and bed, reduced sediment and nutrients, improved habitat, and enhanced water quality.
Huntsman Lake Dam Rehabilitation
Huntsman Lake Dredging and Restoration
Department of Public Works and Environmental Services Pardon Our Dust Meeting
Fairfax County, VA
Peyton Run at Longwood Knolls Community Meeting Oct 1, 2018Fairfax County
This project will restore up to 2,500 feet of stream on Longwood Knolls HOA and Cherry Run section 3 subdivision properties. Sediment and nutrient inputs will be reduced and habitat will be improved.
Paul Spring Branch at Sherwood Hall Stream Restoration ProjectFairfax County
The plan is to return the form and function of the channel to dynamic equilibrium and improve the ecological processes of the riparian corridor within the constraints of the developed landscape.
February 11, 2014 public meeting presentation for three proposed stormwater facility management projects off of Cabin Branch of Great Seneca Creek. (powerpoint file)
Restore ~4,000 feet by returning the form and function of the channel to dynamic equilibrium and improve the ecological processes of the riparian corridor.
Difficult Run at Brittenford Drive Information Meeting May 17, 2017Fairfax County
This project will mitigate flooding, reduce erosion, and protect public and private property. Approximately 3,000 feet of the main channel and 1,500 feet of tributaries will be restored.
Do not include any personal information as all posted material on this site is considered to be part of a public record as defined by section 27 of the Municipal Freedom of Information and Protection of Privacy Act.
We reserve the right to remove inappropriate comments. Please see Terms of Use for City of Toronto Social Media Sites at http://www.toronto.ca/e-updates/termsofuse.htm.
Long Branch Public Meeting - FINAL - 04-11-2022Fairfax County
Overarching Project Goals:
-Achieve Long Branch Central TMDL waste load reduction requirements.
-Provide long-term stability and have low maintenance.
-Improve water quality within the Long Branch Central Watershed.
-Improve habitat and environmental health (ecological lift).
Restore ~1,400 feet by returning the form and function of the channel to dynamic equilibrium and improve the ecological processes of the riparian corridor.
Stabilize the eroding stream banks
Water quality improvement
Sustainability
Infrastructure protection
Habitat improvement
Merrifield Nursery Emergency Gravity Sewer ReplacementFairfax County
During a routine Closed-Circuit Television (CCTV) Camera inspection by Wastewater Collection Division (WCD), it was found that 45 linear feet of 8-inch asbestos reinforced concrete pipe (RCP) between MH-292 to MH-291 was within imminent danger of failing. The bottom of the RCP was missing within the 45 linear feet of repair and the pipe was on the verge of surcharging. After an immediate pre-construction meeting with Merrifield Nursery, it was agreed to work from 6pm-10am everyday of the week to avoid disruption and potentially placing patrons at risk during the biggest time of the year for Merrifield Garden Center. The contractor mobilized to the site and began the 20-foot excavation to replace 45 linear feet of broken gravity sewer. The project started on March 14th, 2022 and was substantially complete on March 23, 2022.
The Sully Basins Stormwater Pond Retrofits project was substantially completed on April 19, 2022. The project is located within the Cub Run watershed. The project consisted of repair and enhancement of multiple stormwater basins, 0326DP, 0964DP and 1484DP. The project also included construction of new stone cascades, stone weir basin structures and the construction of wetlands with high and low marsh areas. The project will facilitate improved sediment removal and improve downstream water quality using forebays and micro pools. Aquatic and natural habitat were also added within the three basins.
Clarks Crossing Road Improvements 05-13-22Fairfax County
The Clarks Crossing Road Pedestrian Access Improvement project improved the pedestrian and bicycle access along Clarks Crossing Road and was substantially completed on March 23, 2022.
This project completed the missing link between the existing sidewalk at Brookside Lane and the previously constructed sidewalk along Clarks Crossing Road. The scope of this project included construction of asphalt sidewalk, curb ramps, curb and gutter, drainage improvements along Brookside Lane and asphalt mill/overlay on Clarks Crossing and Brookside Lane.
Tysons West Wastewater Conveyance Systems Modifications Project 05-22.pptxFairfax County
Future wastewater flows in northern Fairfax County exceed existing system capacity
Treatment capacity is available in Noman M. Cole Jr. Pollution Control Plant in Lorton, VA
New pipes and pumps are needed to move future flows to treatment plant
NEXT STEPS
Field investigations / surveys
Finalize alignments and pump station layout
Use of open cut excavation
Use of trenchless methods
Easement acquisition needed
Develop traffic control plans
Description:
The project consists of a new, 23,000 square feet, two-story, four-bay fire station facility and associated improvements to the 3.3-acre site including storm water detention, landscaping and parking. The scope also included the demolition of the existing fire station, and a temporary fire station to house the Fire and Rescue Department during construction of the new facility. The key elements of the overall project include:
Scotts Run at Old Meadow Road Park Phase I and Phase II Stream RestorationFairfax County
Scotts Run @ Old Meadow Road Stream Restoration was substantially completed on March 30, 2022. The Scotts Run project consisted of restoring, enhancement, and stabilizing of approximately 2,930 linear feet of eroding stream using Natural Channel Design criteria. This project included two phases: Phase I was funded by proffers from a private development and Phase II was County funded. Also included was the removal of invasive non-native plants and the installation of new plantings to stabilize the stream and floodplain.
Riverwood Community Meeting - 04-14-2022- Presentation.pptxFairfax County
The new 4-inch ductile iron force main will serve the surrounding community for the foreseeable future. Replacement of the force main will:
Reduce the level and frequency of maintenance required to keep the force main operating.
Prevent costly emergency repairs.
Provide residents with safe, reliable utility infrastructure.
Enhance the quality of life for residents.
Reduce risks to public health and the environment.
Burke Centre VRE Connector Phase IV project was substantially completed on March 7, 2022. This project enhanced the access to mass transit by creating a more direct connection from the VRE Station to the residential areas west of Premier Court. This project also connects the Oak Bluff community to the Virginia Rail Express (VRE) Burke Station and provides a multi-use shared pedestrian and bicycle trail for outdoor recreation.
Objectives: Share our project understanding with the council and seek input on the unique opportunities and housing goals for this site that could help guide
our master planning process.
Rabbit Branch at Collingham Drive Stream Restoration - March 28, 2022.pptxFairfax County
4,800 linear feet of stream will be restored using Natural Channel Design methodologies
Pollutant reduction
1,439 lbs/total phosphorus
3,400 lbs/total nitrogen
462.1 tons of total suspended sediment
Protection of private property and public infrastructure
Increased ecological diversity with native vegetation
DEQ has awarded a SLAF grant to this project for these environmental benefits
LAKE BARTON DREDGING, RESTORATION AND RISER MODIFICATION PROJECT Fairfax County
The Lake Barton Dredging, Restoration, and Riser Modification project was substantially completed on December 29, 2021. The project is located within the Pohick Creek watershed. The project consisted of dredging and removal of approximately 19,100 cubic yards of sediment to restore the sediment trapping capacity and improve water quality. The project also included construction of new sediment forebays, in-lake haul roads, and riser modifications (new mid-level sluice gate and cold-water intake) to facilitate future maintenance, stabilize the shoreline, and improve downstream water quality. Fish habitat was also added within the lake.
Reston Arts Community Center Feasibility - Wrap UpFairfax County
This is the last of 5 engagement meetings. We are excited to report back what we heard from you – your preferences, priorities, questions, hopes, concerns. The information we received will be used to inform the space allocations and cost estimating for discussion of the proffer by Fairfax County.
Stormwater Wastewater Facility Virtual Community Meeting, March 29, 2022Fairfax County
Benefits of Consolidated Facility
Building and Site Efficiencies
Operational Efficiencies
Addresses Space Deficiencies
Addresses Renovations and Capital Renewal Requirements
for WCD
Provides for a Centrally Located Site that Accommodates Program
Consolidates Integrated Services on One Centrally Located Site
Reston Arts Center Feasibility Study Focus Group - March 28, 2022Fairfax County
This is the 4th of 5 engagement meetings. We are excited to hear from you – your preferences, priorities, questions, hopes, concerns. The information we receive today will be used to inform the space allocations and cost estimating for discussion of the proffer by Fairfax County.
Oak Marr Pump Station Rehabilitation – Construction ProjectFairfax County
Neighborhood was built in the 1980s, and the sewer infrastructure has been in operation since.
Aged pump station equipment – pumps, valves, fans, concrete, etc.
This aging equipment has the potential of causing:
Sanitary Sewer Overflows (SSO)
Sewer back-ups into homes
Environmental damages
Maintenance problems
Tucker Avenue Neighborhood Community Meeting, 03-15-2022Fairfax County
Identify and evaluate house flooding and public safety concerns
Improve drainage conditions to convey 100-year storm if feasible
Reduce and treat stormwater runoff at the source
Improve water quality and stream protection
Use resilient & functional designs
Make improvements compatible with characteristics of neighborhood
Partner with community to develop sound, cost effective solutions that can be collaboratively implemented and maintained
Build on lessons learned to help improve site development process for infill development
Reston Arts Center Feasibility - Focus Group Visual ArtsFairfax County
These community outreach meetings are being conducted to understand community needs for a proposed arts venue in the Reston Town Center.
The proposed arts center would be a result of a proffer from Boston Properties in the next phase of Reston Town Center development (Block J).
The proffer would provide for an approximately 60,000 gross square foot facility to house a stage suitable for large-scale music and dance performances, as well as other arts-related amenities.
Reston Arts Center Feasibility Focus Groups Visual, March 14, 2022Fairfax County
These community outreach meetings are being conducted to understand community needs for a proposed arts venue in the Reston Town Center.
The proposed arts center would be a result of a proffer from Boston Properties in the next phase of Reston Town Center development (Block J).
The proffer would provide for an approximately 60,000 gross square foot facility to house a stage suitable for large-scale music and dance performances, as well as other arts-related amenities.
03062024_First India Newspaper Jaipur.pdfFIRST INDIA
Find Latest India News and Breaking News these days from India on Politics, Business, Entertainment, Technology, Sports, Lifestyle and Coronavirus News in India and the world over that you can't miss. For real time update Visit our social media handle. Read First India NewsPaper in your morning replace. Visit First India.
CLICK:- https://firstindia.co.in/
#First_India_NewsPaper
‘वोटर्स विल मस्ट प्रीवेल’ (मतदाताओं को जीतना होगा) अभियान द्वारा जारी हेल्पलाइन नंबर, 4 जून को सुबह 7 बजे से दोपहर 12 बजे तक मतगणना प्रक्रिया में कहीं भी किसी भी तरह के उल्लंघन की रिपोर्ट करने के लिए खुला रहेगा।
El Puerto de Algeciras continúa un año más como el más eficiente del continente europeo y vuelve a situarse en el “top ten” mundial, según el informe The Container Port Performance Index 2023 (CPPI), elaborado por el Banco Mundial y la consultora S&P Global.
El informe CPPI utiliza dos enfoques metodológicos diferentes para calcular la clasificación del índice: uno administrativo o técnico y otro estadístico, basado en análisis factorial (FA). Según los autores, esta dualidad pretende asegurar una clasificación que refleje con precisión el rendimiento real del puerto, a la vez que sea estadísticamente sólida. En esta edición del informe CPPI 2023, se han empleado los mismos enfoques metodológicos y se ha aplicado un método de agregación de clasificaciones para combinar los resultados de ambos enfoques y obtener una clasificación agregada.
Here is Gabe Whitley's response to my defamation lawsuit for him calling me a rapist and perjurer in court documents.
You have to read it to believe it, but after you read it, you won't believe it. And I included eight examples of defamatory statements/
04062024_First India Newspaper Jaipur.pdfFIRST INDIA
Find Latest India News and Breaking News these days from India on Politics, Business, Entertainment, Technology, Sports, Lifestyle and Coronavirus News in India and the world over that you can't miss. For real time update Visit our social media handle. Read First India NewsPaper in your morning replace. Visit First India.
CLICK:- https://firstindia.co.in/
#First_India_NewsPaper
31052024_First India Newspaper Jaipur.pdfFIRST INDIA
Find Latest India News and Breaking News these days from India on Politics, Business, Entertainment, Technology, Sports, Lifestyle and Coronavirus News in India and the world over that you can't miss. For real time update Visit our social media handle. Read First India NewsPaper in your morning replace. Visit First India.
CLICK:- https://firstindia.co.in/
#First_India_NewsPaper
01062024_First India Newspaper Jaipur.pdfFIRST INDIA
Find Latest India News and Breaking News these days from India on Politics, Business, Entertainment, Technology, Sports, Lifestyle and Coronavirus News in India and the world over that you can't miss. For real time update Visit our social media handle. Read First India NewsPaper in your morning replace. Visit First India.
CLICK:- https://firstindia.co.in/
#First_India_NewsPaper
An astonishing, first-of-its-kind, report by the NYT assessing damage in Ukraine. Even if the war ends tomorrow, in many places there will be nothing to go back to.
Dead Run Stream Restoration Stream Team Kick Off August 18, 2015
1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Dead Run Segments 2/3 Stream Restoration Project
Task Force Kick-Off Meeting
McLean Government Center
August 18, 2015
2. Dead Run Segment 2/3 Stream Restoration Project
Stormwater Planning Division
Discussion Outline
2
• Project limits
• Project identification and regulatory drivers
• Project benefits
• Summary of approach in current concept design
• Outline of proposed approach in new concept
design
• Review of completed stream restoration projects
• Q&A
3. Dead Run Segment 2/3 Stream Restoration Project
Project Limits
3
Segment 2 – McLean
Central Park
• 800 Linear Feet
• Completely in Park
• Starts below previously
restored section near
library
Segment 3 – Dead Run
Stream Valley Park
• 1,500 Linear Feet
• Extends to Churchill Road
• Residential lots along
Elizabeth Drive and Carol
Rayes Street
Stormwater Planning Division
4. Dead Run Stream Restoration Project
Stormwater Planning Division
Watershed Planning and Project Implementation
• Dead Run has a drainage area
just over 3 mi2
• 24 priority projects identified
in the watershed
management plan
• Pond retrofits
• LID Stormwater Enhancements
• Stream Restoration
• Neighborhood Stormwater
Improvements
4
http://www.fairfaxcounty.gov/dpwes/watersheds/middlepotomac.htm
5. Dead Run Stream Restoration Project
Stormwater Planning Division
Watershed Planning and Project Implementation
Project identified and prioritized
by:
• Physical conditions
• Biological health
• Flow and water quality data at
U.S. Geological Survey stream
gage on Dead Run at Whann
Ave.
• Location in watershed:
Headwaters first = Upstream to
Downstream
• Watershed conditions
5
http://www.fairfaxcounty.gov/dpwes/stormwater/projects/project_list.htm
6. Dead Run Stream Restoration Segment 2 and 3
Stormwater Planning Division
Existing Conditions
6
9. Stormwater Planning Division
Stormwater Program Regulatory Drivers
• Virginia Stormwater Management Program (VSMP)
– Municipal Separate Storm Sewer Permit (MS4)
– Includes watershed planning and project implementation
– Includes TMDL requirements for Chesapeake Bay and local streams
• Total Maximum Daily Loads (TMDLs)
– Chesapeake Bay
– Local Streams
– Establishes pollutant loading budget for a given impaired water
body to meet water quality standards
9
10. Stormwater Planning Division
Stormwater Program Regulatory Drivers – MS4 permit
10
Fairfax County’s MS4 Permit has requirements for the Chesapeake Bay and
other (local) TMDLs – see excerpts below:
11. Stormwater Planning Division
Dead Run Stream Restoration
Project Benefits and Goals:
• Improve water quality
– Reduce sediment and nutrient loads
• Stabilize stream banks to
– Reduce stream bank erosion
– Protect property
– Reduce tree loss
• Improve aquatic habitat and biological
health
• Restore and enhance vegetated stream
buffer (riparian corridor)
• Protect infrastructure:
– Sanitary Sewer
– Park Trails
• Reduce frequent flooding, primarily along
upper section of Segment 3
11
12. Stormwater Planning Division
Dead Run Segment 2/3 Stream Restoration Project
Estimated water quality benefits
12
• Chesapeake Bay Expert Panel protocols used for estimating stream
restoration nutrient credits
• For Total Phosphorus (TP) as an example the estimated reduction in
loadings as a result of the proposed stream restoration for Segments
2/3 ranges from 0.063 to 0.261 lbs/LF/yr
• This compares to a ‘default’ rate of 0.068 lbs/LF/yr. The high end of
the estimated load reduction is 3X the default rate
• Total annual estimated reduction in erosion for Segment 2/3 is
between 783 to 1,500 tons/year and the estimated reduction in TP
loading is between 190 and 788 lbs/year
13. Stormwater Planning Division
Dead Run Segment 2/3 Stream Restoration Project
Estimated flood reduction levels
13
Modeled reduction in flood elevations range from 1.2 ft. (2-YR storm) to 0.95 ft. (100-YR storm)
14. Stormwater Planning Division
Dead Run Segment 2/3 Stream Restoration Project
Overview of Approach used to Develop Current Concept
14
– Natural Channel Design (NCD) Approach –
Reference Reach, Analytical, Regional
Relationships and hydraulic analysis
– Stream Pattern, Profile and Section
– Range of Values for Stable Stream Pattern
– Tree Loss is Unavoidable but Provides
Opportunity to Improve Riparian Diversity
15. Stormwater Planning Division
Dead Run Segment 2/3 Stream Restoration Project
Alternative Approaches
15
– Re-walked the stream and buffer again
– Priority/Option 2 and 3 Restoration Approach
– Options for Refinement of the Design
• Smaller Channel Cross-section in specific areas
– Transition from smaller to larger channel sections in
areas, where possible
– Opportunities to save trees
• Still focus on less frequent storm events and
improving the impacts of flooding especially in
the Segment 3 Upper area
• Maintain overall channel stability
16. Stormwater Planning Division
Dead Run Segment 2/3 Stream Restoration Project
Alternative Approaches
16
• Smaller Channel Cross-section in specific areas
– Transition from smaller to larger channel sections
in areas, where possible
– Opportunities to save trees
17. Stormwater Planning Division
Dead Run Segment 2/3 Stream Restoration Project
Alternative Approaches – Access
17
– Alternative 1 Approach
• Proposed some access along the left bank of
the stream through Reach 3 adjacent to
Elizabeth Dr.
– Alternative 2 Approach
• Proposed access within the Park only, along the
sanitary sewer easement and two sections of
trail. No access on private properties.
– Additional alternatives Explored
• Access along sanitary sewer easement and trail.
• Selecting route that has least amount of tree
impacts.
Fig. 1
Fig. 2
18. Dead Run Segment 2/3 Stream Restoration Project
Stormwater Planning Division
Stream Buffer Restoration Potential
18
19. Dead Run Segment 2/3 Stream Restoration Project
Stormwater Planning Division
Chesapeake Bay Preservation Ordinance
Resource Protection Area (RPA)
19
http://www.fairfaxcounty.gov/dpwes/environmental/cbay/
20. Dead Run Segment 2/3 Stream Restoration Project
Stormwater Planning Division
Stream Buffer Existing Conditions
20
21. Dead Run Segment 2/3 Stream Restoration Project
Stormwater Planning Division
Stream Buffer Restoration Potential
21
Segment 3 Stream Buffer Concept
Left Bank Left Bank Residential Residential
35 foot 50 foot 35 foot 50 foot
Area (Acres) 1.14 1.55 0.46 0.87
Canopy Trees 114 155 46 87
Understory Trees 229 310 92 174
Shrubs 1,246 1,690 501 946
Estimate tree and shrub plantings for Segment 3: Left Bank Only
Project Fact
Sheets
22. Stormwater Planning Division
More Information
For additional information call
Dipmani Kumar, P.E., CFM
Project Manager
703-324-5500, TTY 711
dkumar@fairfaxcounty.gov
www.fairfaxcounty.gov/dpwes
22
Editor's Notes
STANTEC
All approaches to design follow NCD Principals
Based on the field study, we started with Priority 2 (aka Option 2) approach. To provide greatest improvement to channel stability, reduction of erosion and capturing of storm events to alleviate nuisance flooding.
Goals to repair the benthics and biology in addition to reducing bed/bank erosion.
Priority 2 Create New Floodplain and Stream Pattern Below the Historical Floodplain Elevation but Above Current Stream Elevation\
Priority 3 Widen FP at existing BF elev.
STANTEC
Priority 3 Widen FP at existing BF elev.
Options for design refinement
Priority 2 and 3 approach.
Smaller channel XS vs Typical, 60 SF vs 90 SF in Seg 3 Upper for example.
pros/cons (ie. Smaller channel section would disturb less land but would not address the flooding as much as the traditional channel design sizing we have no the plan now).
We must incorporate the need to maintain some level of flood reduction for the folks living next to the upper section of Segment 3. This could potentially mean keeping the channel dimensions similar there while transitioning from a smaller channel section upstream and transitioning to a small channel section downstream, as long as the entire system remained stable. I’ll leave it up to you to explain the limitations of maintaining the flood reduction levels in the current concept for the upper section of Segment 3, while revising the upstream and downstream sections to minimize tree loss
STANTEC
Example of alt approach in Seg 2 – where a P3 bank stabilization and preservation approach is used. Minimize work in the channel as well.
Fig 1
Small dark green circles identify trees saved along access route by adjusting the path.
The access path (yellow) is ~15’ wide.
The Blue is the proposed stream channel bankfull width.
This study would have more trail overlaps.
we have looked at alternative access routes, following the trail and sanitary sewer and from a quick study we see a way to at least 22 trees just be adjusting the access routes
Fig 2
Small dark green circles identify trees saved along access route by adjusting the path.
The access path (yellow) is ~15’ wide.
The Blue is the proposed stream channel bankfull width.