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   About the Avon River causeway in Windsor: Yes, it completely changed thedynamics of tidal flow in the Avon River estuary. The net effect was a reduction in flows, hence less turbuence and more silt deposition.
<br/>   Something very similar happened in Moncton. Construction of the Petitcodiac Causeway  caused a reduction in the height of the tidal bores, and narrowing of the river channel downstream of the causeway. The causeway is still there, but is now permanently open. The anadromous fish are happy, I am sure, riverside property owners upstream of the causeway less so. Now their lands border a tidal marsh, and no longer a freshwater reservoir...
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   Dusan Soudek
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<br/>On July 19, 2013 at 10:42 AM james simpson <desolatechair@gmail.com> wrote:
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The Halfway River in Hantsport has two dams owned by Minas Basin P&P and an abateau that pretty much block everything.  I spoke to a DFO person two years ago and they were keen to try and and restock it with Atlantic Salmon spawn from the Gaspereau River as the watersheds were very similar geologically etc.  Some work was done on one of the dams to build a ladder but it seems to have ground to a halt.
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</div> Also re the Avon River...It's interesting that the causeway, while an obvious impediment, seems to have had the serendipitous effect of creating a significant (~100 hectares) salt marsh on the east/seaward side.  Which I think is desirable habitat that if the causeway was removed might wash away. 
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On Thu, Jul 18, 2013 at 9:14 PM, John and Nhung
<span><nhungjohn@eastlink.ca></span> wrote:
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<p class="MsoNormal"><span style="font-family: 'Calibri','sans-serif'; color: #1f497d; font-size: 11pt;">Down our end of the province, where the pickerel and smallmouth black bass roam, some of these dams are desirable barriers to keep these unwanted monsters away from  native stocks.<span style="text-decoration: underline;"></span><span style="text-decoration: underline;"></span></span></p>
<p class="MsoNormal"><span style="font-family: 'Calibri','sans-serif'; color: #1f497d; font-size: 11pt;"><span style="text-decoration: underline;"></span> <span style="text-decoration: underline;"></span></span></p>
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<p class="MsoNormal"><strong><span style="font-family: 'Tahoma','sans-serif'; font-size: 10pt;">From:</span></strong><span style="font-family: 'Tahoma','sans-serif'; font-size: 10pt;"> naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Dusan Soudek
Sent: July-18-13 4:12 PM
To: naturens@chebucto.ns.ca</span></p>
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<strong>Subject:</strong> Re: [NatureNS] Removal of Veazie Dam Impediment from Penobscot River
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<p class="MsoNormal">Paul, <span style="text-decoration: underline;"></span><span style="text-decoration: underline;"></span></p>
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<p class="MsoNormal">   yes, I stand --partially-- corrected. The dam and the associated powerhouse on the Mushamush were abandoned by NSP due to the projected expense of repairs to it. But the structure was eventually removed for environmental reasons. <span style="text-decoration: underline;"></span><span style="text-decoration: underline;"></span></p>
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<p class="MsoNormal">   Another abandoned and dismantled hydro dam in N.S. that comes to mind is at The Falls on Waughs River. The site now has a new fish ladder. The falls are spectacular, especially at high water! <span style="text-decora