Project Completion Abstract Fish Passage Activity ( Engineering Activities)

Transcription

1 Project Completion Abstract Fish Passage Activity ( Engineering Activities) SUBMIT COMPLETED FORM TO DISTRICT MANAGER AND FIA ADMINISTRATOR AFTER PROJECT COMPLETION SECTION A GENERAL INFORMATION Recipient: (name & division) _BC Timber Sales Forest Region / District: Coast / South Island Watershed Name / Operating Area: Doobah / Nitnaht Road Type: ( check only one) ο Forest Service Road X Road Permit Road (pre-1995) ο Non-status road Road Name (formal): Roseander Main Road File / Ref. No.: R7655 Project Location: (road km): _ UTM Coordinates: (attach a key map): Zone 10 E N Stream Name / Stream Classification / Fish Species: _Doobah Trib / s-3 / Act Co Cm St Check one (article 5.2): X Conventional bridge/culvert OR ο Proprietary system or Non-conventional bridge / culvert FIA File No.: / FIA Investment Schedule No.: COTSA FIA Project No.: Priority Stream Fish Passage Restoration Project: ( check if applicable) ο Modifications to a Structure or Stream Channel ο Structural Repairs to a Major Culvert or Bridge ο Culvert Removal & Stream Channel Works X Culvert Removal & Major Culvert or Bridge Installation ο New or Replacement Bridge ο Structural Repairs to Bridge X New or Replacement Major Culvert ο Structural Repairs to Major Culvert PROJECT PRIORITY DETERMINATION Reasonable investment (pre-2008/09) in: X site plans ο designs ο pre-purchased materials Watershed Group Ranking: San Juan 1 Parker assessment (pre-2008/09) score: N/A ο Other Rationale: (attach justification) Fish Barrier New Method Crossing Name: Doobah Trib MFR Site No. / Structure No.: N/A /N/A Project Completion Date: Nov. 1,2009 1

2 Nitinat Area - 15 km Rosander M/L - Culvert Replacement (COTSA ) September - October 2009 Objectives 1. Replacement of twin 900mm x 22 meter culverts that acted as a fish passage barrier with a single 3300mm x 25meter embedded culvert with six baffles, installed on a 4.0 % gradient. 2. Extension of the natural stream bed into the culvert with back fill to baffle height (1.32 m) for spawning & fish passage substrate. 3. Identification and definition of channel above and below crossing to ensure proper functioning of new culvert. Stabilization of channel above crossing. FIA Investment Schedule # COTSA Project Number: Fiscal year: 2009/2010 Author Noel Phillips, RFT Proponent/Implementing Partners BC Timber Sales Star Contracting Co. Ltd. Stonecroft Project Engineering Ltd. M. C. Wright & Associates Noel Phillips BRAT Expediting Fisheries and Oceans Canada Watershed / Stream Nitinat Lake/ Doobah Lake tributary Watershed Code: SANJWSD UTM (NAD83) Coordinates Zone:10 Easting: Northing: Location and Access This site is 13 km by air from the head of Nitinat Lake and 58km by air from Port Alberni. The D crossing is situated at 15 km on Rosander M/L which is accessed by way of the Port Alberni / Franklin / Nitinat Mainlines. Introduction and Rationale The unnamed tributary that eventually drains into Doobah Lake is considered highly valuable habitat for fish. Chinook (Oncorhynchus tshawytscha), coho (O. kisutch) and chum salmon (O. keta) as well as rainbow (and steelhead) (O. mykiss) and coastal cutthroat trout (O. clarki) species (MOE, 2009) Resident cut-throat trout were captured during this project. Doobah Lake is part of the greater Nitinat Lake fish and recreation area. There is 1 km+ of potential rearing channel above this culvert site that was previously inaccessible to fish. The previous twin 900 mm culverts (assessed in January 2009) were deemed a fish passage barrier in the S3-classified channel (Robert et al., 2009). Funding from the Forest Investment Account (FIA), administered through BC Timber Sales, was provided to upgrade the crossing. StoneCroft Project Engineering designed, prescribed and supervised the installation of the 3300mm x 25meter replacement culvert set at 4.0% gradient. M.C.Wright & Associates and Noel Phillips of BRAT Expediting provided environmental and construction monitoring for works conducted by Star Contracting Co. Ltd. in Sept. /October The culvert replacement project was intended to create year-round access to fish habitat above the crossing and to extend the natural stream bed into the culvert by backfilling the CMP to 1.32m with gravel of approved size for spawning and rearing use by fish. In order to ensure the new culvert would function as intended, the channel transition, into and out of the new culvert was reestablished and reconnected into this stream. Additionally, 75m of upstream channel stabilization was performed to ensure channel location into the culvert. 2

3 Installation and Construction The culvert replacement project included: The installation and armoring of the new 3300mm x 25 meter circular metal pipe (CMP) culvert. The use of approximately 30 loads of riprap from 3 quarries, north and south of the project to armor the culvert inlet, outlet and fill slopes. An additional 6 loads of rip rap for upstream channel stabilization. The removal and replacement of approx M 3 of the existing gravel fill. This included handling about 800M 3 of the fill material twice during excavation to elevate for loading out. An additional 300 M 3 of quarried rock to stabilize the road surface and complete final elevation design over a distance of 100+ m. Excavation and placement of correct creek gravel for filling the culvert to design elevation, for salmon spawning and rearing. The definition of channel banks over approximately 100 m (total) to ensure flows function correctly with new culvert. Expansion of banks and creation of pools upstream and at culvert intake and discharge to dissipate energy of flows and promote bank stability. General re-establishment of flows from the upper drainage through the culvert to 30m below the outlet. Environmental and Construction Monitoring On site monitoring was conducted by Noel Phillips of BRAT Expediting following the Sediment and Drainage Management Plan for this project, created by MC Wright & Assoc. and the Stonecroft engineered culvert design. Fish salvage was conducted by MC Wright & Associates. Environmental protective measures utilized throughout construction included inspection of machines for hydraulic leaks, spill kits, the dewatering of the culvert site during embedment with the use of trash pumps, and the preservation of riparian vegetation along channel banks. Expected Outputs The expected outputs for the culvert replacement project include the year-round access for fish to the upper channel habitat. Fish utilization is expected to improve, particularly above the crossing, now that the barrier has been removed and bed material in the culvert matches the channel bed. Costing Summary BCTS Budgeted Total $ 91, Contracted Labor and Materials $ 111, Environmental Monitoring and $ 38, Engineering Culvert Design and Installation BCTS Total Cost $ 150, For Further Information, Contact: Noel Phillips, RFT T.C. Hwy Chemainus, BC - V0R 1K4 brat@xplornet.com Michael Wright B.Sc. R.P. Bio M.C. Wright and Associates 2231 Neil Drive Nanaimo, BC - V9R 6T mike.wright@mcwrightonline.com References Ministry of Environment Fisheries Inventory FISS Fish Distributions Report. Website: fidq/main.do Robert, C. B., R.A. Petch, I.T. Anderton, and T.R. Strelioff Final Completion Report: Fish Passage & Culvert Assessment (PD09TC1062), SW Vancouver Island, B.C. Consultant s report prepared for BCTS Wright M. C. & Associates Sediment and Drainage Management Plan: Culvert Replacement near Doobah Lake Prepared for BCTS, August, Stonecroft Project Engineering Design # DOO-0014 Option #1 Prepared for BCTS, July 25,2009 3

4 4

5 5

6 6