RIVER RESTORATION SYMPOSIA - PRESENTATIONS PORTAL

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River Restoration Northwest brings you the 2020 Symposium Presentations in a new searchable portal (best viewed on a desktop screen).

RIVER RESTORATION SYMPOSIA - PRESENTATIONS PORTAL

WELCOME!

River Restoration Northwest brings you 17+ years of Symposium archives. Presentations by leaders in river restoration. (Best viewed on a desktop screen.)

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Use the filters below to pull up presentations that fall under a general type of theme, subject, or session. Then use the Search function below to search for specific language from presentation abstracts. Click on the name of the presentation to view the full abstract and presentation slides.

PresentationThemeTopics CoveredSessionAbstractYearPresenterpresentation_theme_hfiltertopics_covered2_hfilteryear_session_hfilter
Pre-Dam Removal Topographic Base-Line Data Collection on the Klamath River – Collaboration in Action, , , , , , , , , , , , , , , Year: 2020 Presenter/s: David (DJ) Bandrowski Symposium Session: 2020 – 11 Dam removal in the Pacific Northwest Topics covered: beavers, community involvement, fish passage, floodplain, hydraulics, instream structure (culvert/bridge/dam), riparian, risk, sediment transport, and stream ABSTRACTFour dams on the Klamath River are planned for removal in 2022 to restore volitional …2020David (DJ) Bandrowskibiology construction ecology engineering geomorphology landscape-architecture planning-prioritizationbeavers community-involvement fish-passage floodplain hydraulics instream-structure-culvert-bridge-dam riparian risk sediment-transport stream2020-11-dam-removal-in-the-pacific-northwest
Replacing Low Head Dams with Nature-like Fishways to Improve Fish Passage, , , , , , , Year: 2020 Presenter/s: Matthew Prociv Symposium Session: 2020 – 11 Dam removal in the Pacific Northwest Topics covered: beavers, fish passage, hydraulics, instream structure (culvert/bridge/dam), stream, and urban ABSTRACTImpoundment structures, such as dams, are a reliable method to divert water from otherwise naturally flowing water courses to other locations and …2020Matthew Procivconstruction engineering geomorphologybeavers fish-passage hydraulics instream-structure-culvert-bridge-dam stream urban2020-11-dam-removal-in-the-pacific-northwest
MF Nooksack River Dam Removal Planning: A Smart Infrastructure and Fish Passage Project, , , , , , , , Year: 2020 Presenter/s: April McEwen Symposium Session: 2020 – 11 Dam removal in the Pacific Northwest Topics covered: beavers, fish passage, hydraulics, instream structure (culvert/bridge/dam), risk, and sediment transport ABSTRACTThe Middle Fork Nooksack River Fish Passage Project, near Bellingham, WA, will reestablish access to approximately 16 miles of critical spawning …2020April McEwenengineering geomorphology landscape-architecture planning-prioritizationbeavers fish-passage hydraulics instream-structure-culvert-bridge-dam risk sediment-transport2020-11-dam-removal-in-the-pacific-northwest
Using stream restoration to complement conventional stormwater flow control BMPs, , , , , , , , , Year: 2020 Presenter/s: Steve Thompson Symposium Session: 2020 – 10 Prioritizing restoration Topics covered: beavers, floodplain, hydraulics, permits, riparian, stormwater, and urban ABSTRACTThis talk presents the case for using stream restoration to achieve the same goals and objectives as conventional stormwater flow control BMPs (i.e. detention/infiltration/Low Impact Development) in certain …2020Steve Thompsonconstruction engineering planning-prioritization regulationsbeavers floodplain hydraulics permits riparian stormwater urban2020-10-prioritizing-restoration
Data-Driven Decision Making: An Innovative Prioritization Tool for Restoration (and more!), , , , , , , , Year: 2020 Presenter/s: Robyn Pepin Symposium Session: 2020 – 10 Prioritizing restoration Topics covered: beavers, fish passage, floodplain, instream structure (culvert/bridge/dam), modeling, riparian, and risk ABSTRACTThe Upper Columbia has over 2,000 miles (3,200 km) of salmon, steelhead, and bull trout habitat, a substantial portion of which is inaccessible to fish …2020Robyn Pepinengineering planning-prioritization technologybeavers fish-passage floodplain instream-structure-culvert-bridge-dam modeling riparian risk2020-10-prioritizing-restoration
Tucannon River Geomorphic Analysis and Restoration Prioritization – Take II, , , , , , , , , Year: 2020 Presenter/s: Tracy Drury Symposium Session: 2020 – 10 Prioritizing restoration Topics covered: beavers, fish passage, fish-salmon, floodplain, hydraulics, lessons learned, modeling, and sediment transport ABSTRACTThe Tucannon River was identified as a priority watershed in the 2008 BiOp and determined to be critical to recovery of Snake River Spring …2020Tracy Druryengineering geomorphology planning-prioritizationbeavers fish-passage fish-salmon floodplain hydraulics lessons-learned modeling sediment-transport2020-10-prioritizing-restoration
Planning for Recovery – Filling the Salmonid Rearing Habitat Deficit on the Lower American River, Ca, , , , , , , , , , , , , Year: 2020 Presenter/s: Nick Southall Symposium Session: 2020 – 10 Prioritizing restoration Topics covered: beavers, fish passage, fish-cutthroat, fish-salmon, fish-steelhead, floodplain, hydraulics, lessons learned, modeling, and riparian ABSTRACTToday’s salmon runs in California’s Central Valley have decreased to a small fraction of their historic abundance (Yoshiyama, 1998). Salmonid populations have suffered …2020Nick Southallbiology construction engineering planning-prioritization technologybeavers fish-passage cutthroat fish-salmon fish-steelhead floodplain hydraulics lessons-learned modeling riparian2020-10-prioritizing-restoration
From Source Assessment to Implementation Success – Water Cleanup Planning and the East Fork Lewis Ri, , , , , , , , , , , , Year: 2020 Presenter/s: Jennifer Riedmayer Symposium Session: 2020 – 09 A watershed in transition: Salmon recovery in the East Fork Lewis River Topics covered: beavers, community involvement, floodplain, lessons learned, monitoring, riparian, risk, stormwater, and stream ABSTRACTThe East Fork Lewis River and its tributaries are listed on the state’s polluted …2020Jennifer Riedmayerbiology ecology geomorphology landscape-architecture planning-prioritizationbeavers community-involvement floodplain lessons-learned monitoring riparian risk stormwater stream2020-09-a-watershed-in-transition-salmon-recovery-in-the-east-fork-lewis-river
Assessing recovery partner implementation of Lower Columbia recovery plan programs: an EF Lewis Rive, , , , , , , , , , Year: 2020 Presenter/s: Katie Blauvelt Symposium Session: 2020 – 09 A watershed in transition: Salmon recovery in the East Fork Lewis River Topics covered: beavers, fish-cutthroat, fish-salmon, fish-steelhead, lessons learned, modeling, riparian, sediment transport, stream, and urban ABSTRACTThe Washington Lower Columbia Salmon Recovery and Fish & Wildlife Subbasin Plan was …2020Katie Blauveltbiology planning-prioritizationbeavers cutthroat fish-salmon fish-steelhead lessons-learned modeling riparian sediment-transport stream urban2020-09-a-watershed-in-transition-salmon-recovery-in-the-east-fork-lewis-river
Adaptively Managing the WA Lower Columbia River Recovery Plan: Linking Salmon and Landscape-Scale Th, , , , , , , , , , Year: 2020 Presenter/s: Amelia Johnson Symposium Session: 2020 – 09 A watershed in transition: Salmon recovery in the East Fork Lewis River Topics covered: beavers, community involvement, fish-cutthroat, fish-salmon, fish-steelhead, floodplain, lessons learned, monitoring, and risk ABSTRACTSalmon and steelhead recovery in the Lower Columbia River region relies on threat reductions …2020Amelia Johnsonbiology planning-prioritization regulationsbeavers community-involvement cutthroat fish-salmon fish-steelhead floodplain lessons-learned monitoring risk2020-09-a-watershed-in-transition-salmon-recovery-in-the-east-fork-lewis-river
Modernizing the Columbia River Treaty – Opportunities and Challenges, , , , , Year: 2020 Presenter/s: Kathy Eichenberger Symposium Session: 2020 – Invited Speaker Topics covered: beavers, Canada, climate change, community involvement, and permits ABSTRACTThe Columbia River Treaty was ratified in 1964 and has been implemented collaboratively by the U.S. and Canada for over 50 years, much of the time under the radar. …2020Kathy Eichenbergerplanning-prioritization regulationsbeavers canada climate-change community-involvement permits2020-invited-speaker
Incentivizing Channel Migration: Channel Migration Zone Easements along the Yellowstone River, , , , , , , , , , , , Year: 2020 Presenter/s: Wendy Weaver Symposium Session: 2020 – 08 Pre-Disaster: An ounce of prevention is worth a pound of cure Topics covered: beavers, climate change, community involvement, floodplain, outside PNW, permits, riparian, risk, and stream ABSTRACTThe expansion of bank armor on the Yellowstone River in Montana has resulted in …2020Wendy Weaverecology geomorphology landscape-architecture planning-prioritization regulationsbeavers climate-change community-involvement floodplain outside-pnw permits riparian risk stream2020-08-pre-disaster-an-ounce-of-prevention-is-worth-a-pound-of-cure
Fluvial Hazard Mapping in Colorado, , , , , , , , Year: 2020 Presenter/s: Katie Jagt Symposium Session: 2020 – 08 Pre-Disaster: An ounce of prevention is worth a pound of cure Topics covered: beavers, community involvement, lessons learned, outside PNW, risk, and urban ABSTRACTIn order to recognize and assess the hazards associated with erosion, sediment deposition and other dynamic river …2020Katie Jagtgeomorphology landscape-architecture planning-prioritization technologybeavers community-involvement lessons-learned outside-pnw risk urban2020-08-pre-disaster-an-ounce-of-prevention-is-worth-a-pound-of-cure
Financing the risk of catastrophic wildfire reduction: The Forest Resilience Bond, , , , , , , , Year: 2020 Presenter/s: Nick Wobbrock Symposium Session: 2020 – 08 Pre-Disaster: An ounce of prevention is worth a pound of cure Topics covered: _other, beavers, community involvement, outside PNW, riparian, risk, and stream ABSTRACTIn 2018, wildfires in the United States caused an estimated $24 billion in economic losses—a record-high—claiming human …2020Nick Wobbrock_other ecology planning-prioritizationother beavers community-involvement outside-pnw riparian risk stream2020-08-pre-disaster-an-ounce-of-prevention-is-worth-a-pound-of-cure
Opportunities from the Ashes: Pursuing Multiple Benefit Community and Landscape Resilience Following, , , , , , , , , , Year: 2020 Presenter/s: Virginia Mahacek Symposium Session: 2020 – 08 Pre-Disaster: An ounce of prevention is worth a pound of cure Topics covered: beavers, climate change, floodplain, lessons learned, outside PNW, riparian, risk, and sediment transport ABSTRACTRecent catastrophic wildfires have caused devastating human impacts including deaths, injuries, health risk exposures, …2020Virginia Mahacekecology geomorphology planning-prioritization regulationsbeavers climate-change floodplain lessons-learned outside-pnw riparian risk sediment-transport2020-08-pre-disaster-an-ounce-of-prevention-is-worth-a-pound-of-cure
Stream and Floodplain Restoration on North Touchet River: Designing and Building on Private Lands Wi, , , , , , , , Year: 2020 Presenter/s: Paul DeVries Symposium Session: 2020 – 07 Selling the solution: Piloting projects and stakeholder engagement Topics covered: beavers, community involvement, fish-salmon, fish-steelhead, floodplain, and riparian ABSTRACTThis talk is a case study of implementing reach scale restoration projects while working under changing physical conditions and landowner perspectives, and …2020Paul DeVriesconstruction ecology geomorphology technologybeavers community-involvement fish-salmon fish-steelhead floodplain riparian2020-07-selling-the-solution-piloting-projects-and-stakeholder-engagement
Planning “total restoration” of a pilot watershed, , , , , , , , , , Year: 2020 Presenter/s: Reid Camp Symposium Session: 2020 – 07 Selling the solution: Piloting projects and stakeholder engagement Topics covered: beavers, community involvement, estuary, fish-cutthroat, fish-salmon, fish-steelhead, lessons learned, monitoring, riparian, and stream ABSTRACTReid Camp The Middle Nemah River drains approximately 6,000 hectares (nearly 15,000 acres) into Willapa Bay (Washington), …2020Reid Campecology planning-prioritizationbeavers community-involvement estuary cutthroat fish-salmon fish-steelhead lessons-learned monitoring riparian stream2020-07-selling-the-solution-piloting-projects-and-stakeholder-engagement
Southern Resident Killer Whales – Top Predators in need of a Restored Ecosystem, , , , , Year: 2020 Presenter/s: Kenneth Balcomb Symposium Session: 2020 – Invited Speaker Topics covered: _other, estuary, lessons learned, monitoring, and tidal ABSTRACTKiller whales have been known since antiquity as voracious marine predators in all oceans, and they have played an iconic role in the mythology of indigenous coastal communities in the …2020Kenneth Balcombbiology ecologyother estuary lessons-learned monitoring tidal2020-invited-speaker
Floods, Drought, and Alternate States in Algal-based River Food Webs, , , , , , Year: 2020 Presenter/s: Mary E. Power Symposium Session: 2020 – Invited Speaker Topics covered: beavers, floodplain, hydraulics, monitoring, sediment transport, and stream ABSTRACTIn sunlit western rivers, winter and summer flows determine the production, types, and fate of algae in summertime food webs. Ecologically critical flows depend not only on precipitation …2020Mary E. Powerbiology ecologybeavers floodplain hydraulics monitoring sediment-transport stream2020-invited-speaker
Quantitative Food Web Analysis to Detangle Restoration Effectiveness in Co-limited Habitats, , , , , , , , , Year: 2020 Presenter/s: John Jorgensen Symposium Session: 2020 – 05 Assessing biotic response to environmental change Topics covered: amphibians, beavers, fish-cutthroat, fish-salmon, fish-steelhead, monitoring, riparian, and stream ABSTRACTQuantifying carrying capacity in lotic ecosystems is central to identifying limiting factors and prioritizing restoration actions for native anadromous salmonid populations. Geomorphic and …2020John Jorgensenbiology ecology geomorphologyamphibians beavers cutthroat fish-salmon fish-steelhead monitoring riparian stream2020-05-assessing-biotic-response-to-environmental-change
Aquatic Organism Passage for Boreal Toads – Stream Restoration for Species other than Fish, , , , , , , Year: 2020 Presenter/s: Daniel March Symposium Session: 2020 – 05 Assessing biotic response to environmental change Topics covered: amphibians, instream structure (culvert/bridge/dam), lessons learned, monitoring, outside PNW, stream, and terrestrial species ABSTRACTTreatment of stream channels, and the environment in general, half a century ago was much different than the thought …2020Daniel Marchbiology ecologyamphibians instream-structure-culvert-bridge-dam lessons-learned monitoring outside-pnw stream terrestrial-species2020-05-assessing-biotic-response-to-environmental-change
On Patients and Patience: Stream Restoration as a Healing Process, , , , , , , , , Year: 2020 Presenter/s: Mark Beardsley Symposium Session: 2020 – 05 Assessing biotic response to environmental change Topics covered: beavers, community involvement, floodplain, lessons learned, monitoring, riparian, risk, and stream ABSTRACTBiotic processes are now recognized as key drivers of stream form and function that work in concert with hydrological and geomorphic …2020Mark Beardsleybiology ecology geomorphologybeavers community-involvement floodplain lessons-learned monitoring riparian risk stream2020-05-assessing-biotic-response-to-environmental-change
Perspectives in the Mitigation of Rockslides affecting Fish Migration, , , , , , , , , , Year: 2020 Presenter/s: Barry Chilibeck Symposium Session: 2020 – Invited Speaker Topics covered: beavers, Canada, fish passage, hydraulics, lessons learned, risk, sediment transport, and stream ABSTRACTLandslides are a physical process that had an undeniable effect on the landscapes within the Pacific Northwest. Recently, they have been experienced on several rivers …2020Barry Chilibeckconstruction ecology engineering geomorphologybeavers canada fish-passage hydraulics lessons-learned risk sediment-transport stream2020-invited-speaker
Multi-Year Monitoring of Stage 0 Restoration Using a Geomorphic Complexity Approach, , , , Year: 2020 Presenter/s: Daniel Scott Symposium Session: 2020 – 04 Observe Stage 0 Topics covered: beavers, lessons learned, monitoring, and sediment transport ABSTRACTStage 0 Restoration seeks to restore natural fluvial processes to valley bottoms to sustain a spatially heterogeneous and dynamic morphologic state that can then support a robust and …2020Daniel Scottecology geomorphologybeavers lessons-learned monitoring sediment-transport2020-04-observe-stage-0
Towards a Programmatic Monitoring Plan for Restoration to Stage 0, , , , , , , , Year: 2020 Presenter/s: William Brignon Symposium Session: 2020 – 04 Observe Stage 0 Topics covered: beavers, hydraulics, lessons learned, monitoring, riparian, and stream ABSTRACTStage 0 is the initial, pre-disturbance condition in the Stream Evolution Model described by Cluer and Thorne (2013). Recently, a group of US Forest Service restoration practitioners …2020William Brignonbiology ecology geomorphology planning-prioritizationbeavers hydraulics lessons-learned monitoring riparian stream2020-04-observe-stage-0
Low-Tech Process-Based Restoration Design Principles, , , , , , Year: 2020 Presenter/s: Joe Wheaton Symposium Session: 2020 – 04 Observe Stage 0 Topics covered: _other, beavers, instream structure (culvert/bridge/dam), and stream ABSTRACTThe scope of riverscape degradation far exceeds the modest footprint and scalability of most traditional restoration techniques with expensive price tags. Modern restoration practice borrows from a design …2020Joe Wheatonecology engineering geomorphology landscape-architectureother beavers instream-structure-culvert-bridge-dam stream2020-04-observe-stage-0
A restoration program which the planning team will never live to see the result, San Juan River, , , , , , , , Year: 2020 Presenter/s: Neil Goeller Symposium Session: 2020 – 03 An ecological approach to restoration Topics covered: Canada, floodplain, monitoring, riparian, stream, and wetlands ABSTRACTA restoration program which the planning team will never live to see the result, San It is said that “The true meaning of life is to …2020Neil Goellerbiology ecology landscape-architecture planning-prioritizationcanada floodplain monitoring riparian stream wetlands2020-03-an-ecological-approach-to-restoration
Considering Sediment Dynamics in River Restoration Design, , , , , Year: 2020 Presenter/s: Travis Stroth Symposium Session: 2020 – 02 Considering sediment dynamics in river restoration design Topics covered: modeling, outside PNW, and sediment transport ABSTRACTThe complex nature of river systems presents many challenges to understanding, analyzing, and designing in the context of stream management and restoration. River science and …2020Travis Strothconstruction engineering geomorphology technologymodeling outside-pnw sediment-transport2020-02-considering-sediment-dynamics-in-river-restoration-design
Managing Stream Corridor Evolution in the Sierra Foothills, , , , , , , , , , Year: 2020 Presenter/s: Damion Ciotti Symposium Session: 2020 – 04 Observe Stage 0 Topics covered: beavers, floodplain, hydraulics, lessons learned, outside PNW, riparian, sediment transport, and stream ABSTRACTDevelopments in our understanding of stream channel evolution and application of ecological design have changed not only the restoration approach in degraded valley …2020Damion Ciotticonstruction ecology engineering geomorphologybeavers floodplain hydraulics lessons-learned outside-pnw riparian sediment-transport stream2020-04-observe-stage-0
Protecting and Restoring Cold Water Refuges in the Columbia River, , , , , , , , , , Year: 2020 Presenter/s: John Palmer Symposium Session: 2020 – 01 Protecting critical flows Topics covered: climate change, estuary, fish passage, fish-cutthroat, fish-salmon, fish-steelhead, floodplain, hydraulics, monitoring, and stream ABSTRACTCold water refuges (CWR) in the Columbia River provide important resting areas for threatened and endangered species, steelhead and fall chinook, during …2020John Palmerbiology ecologyclimate-change estuary fish-passage cutthroat fish-salmon fish-steelhead floodplain hydraulics monitoring stream2020-01-protecting-critical-flows
Into the multiverse: River restoration versus the Anthropocene, , , , , , , , , , Year: 2020 Presenter/s: Peter Downs Symposium Session: 2020 – Invited Speaker Topics covered: climate change, floodplain, lessons learned, monitoring, sediment transport, and stream ABSTRACTThe (inter)discipline of river restoration has now been practiced for 30 years. Following several decades of growing environmental awareness and scientific recognition of human-induced ‘river stresses’, the …2020Peter Downs_other biology ecology engineering geomorphology planning-prioritizationclimate-change floodplain lessons-learned monitoring sediment-transport stream2020-invited-speaker
Designing for failure – Rethinking how we can restore ecosystem resilience, , , , , , , , , , , , , , , Year: 2020 Presenter/s: Marjorie Wolfe Symposium Session: 2020 – 03 An ecological approach to restoration Topics covered: beavers, climate change, estuary, fish passage, floodplain, hydraulics, monitoring, risk, sediment transport, and stream ABSTRACTIn a future featuring climate and land-use changes, enduring success in delivering ecosystem resilience relies on restoring the capacity …2020Marjorie Wolfebiology construction ecology engineering geomorphology planning-prioritization regulationsbeavers climate-change estuary fish-passage floodplain hydraulics monitoring risk sediment-transport stream2020-03-an-ecological-approach-to-restoration
Quantifying and predicting the role of in-stream wood on general bed scour and the implications to s, , , , , , , , , , , Year: 2020 Presenter/s: Tim Abbe Symposium Session: 2020 – 02 Considering sediment dynamics in river restoration design Topics covered: estuary, fish passage, fish-salmon, floodplain, hydraulics, lessons learned, monitoring, riparian, sediment transport, and wood ABSTRACTWood material can directly influence fluvial processes that control channel planform, substrate characteristics, alluvial topography and floodplain …2020Tim Abbebiology ecology geomorphologyestuary fish-passage fish-salmon floodplain hydraulics lessons-learned monitoring riparian sediment-transport wood2020-02-considering-sediment-dynamics-in-river-restoration-design
Channel Width as a Proxy for Bed Material Transport Rate: Evidence from Morphologic Sediment Budgets, , , , , , , , Year: 2020 Presenter/s: Andrew Nelson Symposium Session: 2020 – 02 Considering sediment dynamics in river restoration design Topics covered: floodplain, hydraulics, modeling, monitoring, outside PNW, sediment transport, and stream ABSTRACTBed material transport rate is a first-order control over channel morphology and geomorphic processes in alluvial rivers—but reliable estimation of bed …2020Andrew Nelsonecology engineering geomorphologyfloodplain hydraulics modeling monitoring outside-pnw sediment-transport stream2020-02-considering-sediment-dynamics-in-river-restoration-design
Restoration of Incised Streams: Recognizing gravel as a limited resource using a simple metric…, , , , , , , , , , , Year: 2020 Presenter/s: Nick Legg Symposium Session: 2020 – 02 Considering sediment dynamics in river restoration design Topics covered: fish passage, fish-salmon, floodplain, hydraulics, lessons learned, monitoring, riparian, sediment transport, and stream ABSTRACTRestoration of incised alluvial streams is a common yet still challenging problem faced throughout the Pacific Northwest, where …2020Nick Leggecology engineering geomorphology planning-prioritizationfish-passage fish-salmon floodplain hydraulics lessons-learned monitoring riparian sediment-transport stream2020-02-considering-sediment-dynamics-in-river-restoration-design
Application of stream heat budget modelling to assess thermal mitigation options – case study, , , , , , , , , Year: 2020 Presenter/s: David West Symposium Session: 2020 – 01 Protecting critical flows Topics covered: Canada, climate change, fish passage, floodplain, hydraulics, modeling, and stream ABSTRACTStream temperatures have been rising in many streams of the Pacific Northwest due to land use and flow regime alterations and climate change. Fish species …2020David Westbiology ecology planning-prioritization technologycanada climate-change fish-passage floodplain hydraulics modeling stream2020-01-protecting-critical-flows
Passive restoration through flow augmentation: the lower North Fork Skokomish River, , , , , , , , , , , , , Year: 2020 Presenter/s: Florian Leischner Symposium Session: 2020 – 01 Protecting critical flows Topics covered: fish passage, fish-cutthroat, fish-salmon, fish-steelhead, hydraulics, instream structure (culvert/bridge/dam), lessons learned, monitoring, and stream ABSTRACTacoma Power completed construction of the Cushman Hydroelectric Project on the Olympic Peninsula in 1930. The Project includes two dams, two …2020Florian Leischnerbiology construction ecology engineering geomorphology technologyfish-passage cutthroat fish-salmon fish-steelhead hydraulics instream-structure-culvert-bridge-dam lessons-learned monitoring stream2020-01-protecting-critical-flows