musquodoboit harbour watershed studies information meeting
DESCRIPTION
Watershed servicing study highlights - Musquodoboit Harbour, NSTRANSCRIPT
Musquodoboit Harbour Watershed Studies Information Meeting - Agenda
• Introduction (Bob Bjerke, Chief Planner)• Welcome (Coun. David Hendsbee)• Watershed study overview (Marcus Garnet, Senior
Planner)• Questions (Bob Bjerke and Marcus Garnet)• Closing Remarks (Bob Bjerke and Coun. Hendsbee)
Musquodoboit Harbour Arena Multipurpose Room7:00 pm
April 12, 2023
Musquodoboit Harbour Watershed StudiesInformation Meeting
19 June 2014
April 12, 2023
HRM Watershed Studies
COMPLETED/IMMINENT:• Hubbards• Lake Echo• Musquodoboit Harbour• Porters Lake• Shubenacadie Lakes• Tantallon
FUTURE:• Birch Cove Lakes• East Preston-Sandy Lake• Musquodoboit Valley• Prospect
April 12, 2023 Musquodoboit Harbour Watershed Studies
Study Area
Origin• 2006 RMPS Policy E-17 requires
watershed studies prior to secondary planning, to determine the carrying capacity and meet water quality objectives
• Community Vision Action Plan Goal I-1 is to explore options for water and sewer in the village core
April 12, 2023Musquodoboit Harbour Watershed Studies
Specialist Engagement• CBCL engineering, technical and planning expertise• Halifax Water costing and policy input• HRM planning and financial analysis• Halifax Regional Watersheds Advisory Board review and
recommendations to Community Council
Musquodoboit Harbour Watershed Studies
April 12, 2023
CBCL References - Groundwater• Ham, 1999. Geological Map of the Musquodoboit Batholith, OFM ME
1999-2. NSDONR.• McIntosh, 1984. Groundwater Hydrographs in Nova Scotia 1965-81.
NSDOE.• NSDEL, 2005. Water Well Records Database.• NSDEL, 2005. Pumping Test Database.• Pinder, 1968a. Hydrogeology of the Lower Musquodoboit River
Valley, Nova Scotia, Report 68-2. NSDOM.• Pinder, 1968b. Application of the Digital Computer for Aquifer
Evaluation, Water Resources Research, 4: 1069-1093.• Also geological maps
CBCL References - Receiving Waters
• Loucks & Sadler, 1971. “Exchange processes between Petpeswick Inlet and continental shelf waters: a preliminary report.” AOL (Canada)
• Loucks, 1993. “A snapshot view of Petpeswick Inlet water Quality”• Young, Walter & Gaudet, 2001. “Re-evaluation Report – Nova Scotia
Shellfish Growing Sectors 12-010 to 14-040, Musquodoboit – Lockeport.” Manuscript Report No. EP-AR-2001-4. EC, EPB
• Also general references
Community Engagement One of several initiatives linked to Community Vision MHRRA Infrastructure Subcommittee MHRRA engineer representation on Steering Committee Meeting with interested landowners/developers MHRRA Infrastructure Subcommittee analysis assisted by
HRM Finance
Musquodoboit Harbour Watershed Studies
April 12, 2023
Milestones Watershed Study Final Report (2007) Follow-Up Study Final Report (2010) RWAB (March 12, 2014) Community Council (June 12, 2014) Information Meeting (June 19, 2014)
April 12, 2023
Why the second study?• Reduce service area• Optimize the general concepts and costs
presented in the 2007 study• Integrate local knowledge and expertise • Recommend potential servicing schemes
… all to allow development consistent with the Community Vision
April 12, 2023Musquodoboit Harbour Watershed Studies
Two Watershed StudiesFIRST STUDY:- Small-diameter sewer
with septic tanks- All existing low-
density plus higher-density infill
- Wide area (176 ha)- Medium growth
April 12, 2023Musquodoboit Harbour Watershed Studies
FOLLOW-UP STUDY:- Standard sewer, no septic
tanks- Some existing low-density
but mostly higher-density infill- Focused area (12.5, 70 or
126 ha)- Low, Median & High growth
Follow-Up Study Service Area
2023-04-12
Component Studies included…• Groundwater• Receiving waters• Surface water & eutrophication• Watershed feature conservation• Sources of contamination• HRM Stormwater Guidelines adaptation• Natural corridors & habitats• Riparian buffers• Development potential
Musquodoboit Harbour Watershed Studies
Three serviceable parcels
Technical OptionsServicing:• Water only• Sewer only• Sewer and water
Sewage Treatment Plant:• Secondary with trunk corridor extension• Tertiary with no corridor extension
April 12, 2023Musquodoboit Harbour Watershed Studies
Piped Water Only – Potential Service Area
2013 Estimated Minimum Capital Costs+
Growth Scenario >>>Servicing Options vvv
2006 2026 Low
2026 Low-Med
2026 Med
2026 High
Central Pipe Hookups: 0 sewer0 water
320 sewer449 water
0 sewer 758 water
1316 sewer1444 water
2397 sewer2418 water
Central Water Only n/a $8.9 million $10.7 million 11.2 million 12.7 million
Cost/service n/a $19,743 $14,143 $7,727** 5,270**
Central Sewer Only n/a $23.4 million n/a* $28 million $32.4 million
Cost/service n/a $69,770 n/a* $20,991 $13,510
Central Water & Sewer n/a $32.5 million n/a* $39.2 million $45.1 million
Cost/service n/a $89,513 n/a* $28,718 $18,781
+ Also add approx. 10% for engineering fees, 4.3% net HST, and 2.35% for interest and overhead. Does not include any land acquisition costs.* Low-Medium Growth Scenario assumes cluster subdivision with disposal fields; 2 units/ acre net density** Water-Only would not enable enough density to meet the Medium or High Growth Scenarios.
Operating Costs• in addition to the capital and financing costs• paid by each landowner via regular billing • billing amount would be independent of metro area• estimated average: $520 per hookup• assumes 720 water hook-ups• plus a Wastewater Management District fee
April 12, 2023Musquodoboit Harbour Watershed Studies
Challenges• Very high costs to homeowners• Would there be enough new development
to ensure that HRM recovers all up-front capital costs?
• No external funding opportunities
April 12, 2023Musquodoboit Harbour Watershed Studies
Findings for Watershed• Up-river agriculture affects affects harbour &
watercourse• Local septic run-off affects lower rivers, harbour & inlet• Peninsula interiors have a groundwater recharge
function
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Implications for Growth• Approx. 150-600 acres (60-250 ha) of developable land
within 15-10 minute walk of centre• On-site well & septic could enable 1.6 people/acre
(4pph)• At 2.4 people per household, this would average 0.7
units/acre• Could still accommodate over 250 more units (500 more
people) within a walkable distance• These are average gross densities• Cluster subdivision could enable more compact
densities in specific locations closest to the village core
Musquodoboit Harbour Watershed Studies
April 12, 2023
RWAB/HEMDCC Resolution • Accept CBCL reports as background for future
community planning• Recommend that the Environment & Sustainability
Standing Committee request a staff report to consider:– a wastewater management district– a floodplain mapping study– routine testing of discharges from plants & stormwater systems– developing a plan for regular septic maintenance– water quality monitoring of rivers– recommending that the Province upgrade their water systems
Musquodoboit Harbour Watershed Studies
April 12, 2023
Next Steps• Community Council conveys its
recommendation (originating from the RWAB) to the Environment & Sustainability Standing Committee
• Environment & Sustainability Standing Committee requests a staff report to consider the items raised by RWAB
• Staff prepares the report to the Standing Committee
Musquodoboit Harbour Watershed Studies
April 12, 2023
RP+5 Public HearingTuesday, June 24, 2014, at 6:00 p.m. in the Halifax Regional Council Chambers at City Hall, 1841 Argyle Street, Halifax
Written submissions may be forwarded to the Municipal Clerk:• By mail: P.O. Box 1749, Halifax, NS, B3J 3A5• By fax: 490-4208• By e-mail: [email protected].
Written submissions must be received by the Municipal Clerk’s office no later than 3:00 p.m. on Tuesday, June 24, 2014.
Musquodoboit Harbour Watershed Studies
April 12, 2023
For more RP+5 information…• On-line at http://www.halifax.ca/council/agendasc/cagenda.php and by
choosing the appropriate meeting dates (May 20, 2014 and June 24, 2014)
• Paper copies can be inspected in person at: – Office of the Municipal Clerk, 1st Floor City Hall, 1841 Argyle St.,
Halifax – Bayers Road Customer Service Centre, 2nd Floor (Suite 2005), 7071
Bayers Rd., Halifax – Planning Office of HRM Planning & Infrastructure, 3rd Floor,
Dartmouth Ferry Terminal Building, 88 Alderney Drive, Dartmouth
• Arrangements can also be made to obtain electronic or paper copies by contacting the Clerk’s Office (490-4210) or Planning Services (490-4937)
Musquodoboit Harbour Watershed Studies
April 12, 2023
Thank you!
Questions?
April 12, 2023Musquodoboit Harbour Watershed Studies
APPENDIXFinancial and Technical Notes
Objectives of First Study• Identify opportunities for development in
the community and on the peninsula between Musquodoboit Harbour and Petpeswick Inlet
• Develop a plan showing all land suitable for development, with recommended densities and services
April 12, 2023Musquodoboit Harbour Watershed Studies
Follow-Up Study Objectives• Increase assimilative capacity by addressing faulty
sewage systems• Optimize configuration for small sewage system• Feasibility and cost of central water only• Water supply potential of Musquodoboit & Little Rivers• Possible contaminant impacts on potential wells next to
Musquodoboit River• Achievable 5-10 year population growth, density and
distribution with on-site, piped water or combined piped services
• Analyze existing water quality data in Little River
April 12, 2023Musquodoboit Harbour Watershed Studies
Likely DevelopmentLikelyDevelopment
Low Growth Medium Growth
10-year horizon 300 units 165 units 660 units
20-year horizon unknown 330 units 1320 units
Open Space Subdivision
Conventional Subdivision
Cost Recovery Mechanisms
Existing Future
Plants CCC CCC
Trunk Pipes LIC LIC
Local Pipes n/a Construction
Risks• Septic systems on existing lots might be
unable to cope with piped water• Bromates or radionucleides might
increase treatment costs
April 12, 2023Musquodoboit Harbour Watershed Studies
Why the delay?• test case for piped servicing for a Rural
Growth Centre • important input to RP+5 • follow-up study• community representation in follow-up study• inter-agency discussions (Halifax Water)• Internal HRM discussions (risk)• community representatives requested a
delay to explore further options and costs
April 12, 2023Musquodoboit Harbour Watershed Studies