News and information on BVFF conservation projects
As a part of taking care of our waterways, BVFF encourages members to pick up some trash at the end of their fishing day. We appreciate all that have participated in our #FillTheNet program and know that many of you do it but don't post a photo. Leading by example is important, but for it to do any good people have to see you do it!
To help show others how we take care of our waterways, we ask that you post a photo to social media and tag it #FillTheNet. If you're not into Facebook, send us a photo at conservation@bvff.com and we'll post it for you! Join BVFF's Facebook Group Page for more club updates, river updates, fishing reports and more!
BVFF FACEBOOK PAGE: https://www.facebook.com/groups/23111329988
THANK YOU to those who have posted recently:
Maggie Sayz #FillTheNet For Good Fishing Karma!
Summary:
In April, BVFF submitted a proposal to Idaho Fish and Game (IDF&G) to change their Fisheries Management Plan for the Boise River to manage the section of the Boise River by the Diane Moore Nature Center for wild trout. We also proposed they change the Fishing Regulations to limit the catch impact by reducing the bag limits and or closing that section of river during the rainbow trout spawning season. For a full description of the proposal please see this previous conservation blog article .
Last week IDF&G asked to meet with us to discuss our proposed changes. IDF&G said that BVFF did a good job on their proposal, however they were not able to move the regulations portion of the proposal forward for consideration by the commissioners because changes to regulations in this cycle must align with the current/approved fisheries management plan. IDF&G apologized for the confusion—having both the regulations and the plan up for review at the same time doesn’t usually happen. IDF&G did think the proposal to manage the upper section for wild trout was reasonable and it is being considered for review by the commissioners. Changes to the fisheries management plan will come out in July.
IDF&G admitted that they don’t know much about the trout population on this section of river, as the Barber Pool is difficult to electro-fish. But they committed to studying the area more to better understand the fish population and then then talk about possible regulation changes in 3 years when the next regulation change cycle occurs. IDF&G was very complimentary on our work to improve woody cover for juvenile trout in our side channel and at the Diane Moore Nature Center and emphasized that trout habitat improvements like this are an important part of improving the trout population.
While we were surprised by not being able to change the regulations along with the fisheries management plan, we understand the limitation and are pleased that IDF&G is considering the proposal to manage the area for wild trout and that they are going to study the trout population in this section of river. BVFF is committed to helping IDF&G and we plan to do more snorkel fry surveys in the restored side channel. BVFF is also committed to continuing to invest resources in trout habitat improvements at the Diane Moore Nature Center and the Barber Pool. Stay tuned for more details on future projects in this unique and special area.
We encourage members to give IDF&G feedback on their proposed changes to the fishing regulations on their website .
BVFF has been working on a gravel augmentation for the lower Owyhee river (below the Owyhee Dam) for several years. We started in November of 2021 by doing a study of the depth, water velocity and bottom structure that brown trout were using to spawn and then used that information to evaluate a proposed gravel augmentation location. Gravel augmentations are expensive endeavors, so we applied for a grant from FFI and ODFW to help pay for the project.
Anytime you do work in a river, you are required to have a stream alteration permit from the Army Corps of Engineers as well as approval from the local department of water resources and permission from the landowner., which in this case is BLM. As we navigated the permitting process, we learned that we would need an engineering analysis to show the impact to the flood zone. It took some time, but we found an engineering firm that was willing to do the analysis and we raised the necessary funds through Idaho Gives and a club “Greenbacks for Redds” program.
When we got back to the permitting process we found that the players at the different agencies had changed, so we had to start those discussions over. After numerous meetings we obtained all of the necessary signatures and were able to submit our Stream Alteration Permit to the Army Corps of Engineers. We expect the permit to be completed by August, at which time we will reapply for the ODFW grant (which expired) and if all goes well, we will do the gravel augmentation in late October, after the flows drop to winter levels.
This gravel augmentation is 100 cubic yards, which is ten times larger than the ones we have done on the Boise River. But don’t worry, we’re not moving it by wheelbarrow! The day before, the gravel will get staged near the site and the Owyhee River Ranch has volunteered to use their front-end loader to transfer it into a gravel shooter/slinger which will throw it from the road into the river with the goal of laying down a 6 inch base of gravel through the run.
We still have some planning work to do, including working with Malheur county on a traffic control plan and coordinating with Sunroc and the gravel shooter company, as well as volunteers to help on the day of the augmentation. We will post the event for volunteer signups once we have the permit and the date. If you are interested in helping with any of the remaining tasks, please reach out to us at conservation@bvff.com.
Many thanks to those who contributed to Idaho Gives and bought Greenbacks. Inflation has increased the cost of the augmentation. If you want to help support it, consider buying a “Greenback” at the BVFF-Store.
Thanks to the Vale BLM office and ODFW fish biologists Dave Banks and Kirk Handley for their continued support on this project. And my thanks to Forrest Goodrum and Jon Fishback for their help on the initial grant proposal and budgeting on the project.
For more background on the Owyhee gravel augmentation, see this previous conservation blog article., and you can see our stream alteration permit and drawings here.
BVFF has submitted a stream alteration permit to the Army Corps of Engineers for a gravel augmentation project on the lower Owyhee River.
A copy of that permit can be found HERE. BVFFOregonJointPermitApplicationSignedLandownerApplicant.pdf
A copy of the permit drawings can be found HERE. PermitDrawings.pdf
An update on the gravel augmentation project will be posted on the Conservation Blog soon. A copy of the Permit Application Acceptance Email is below.
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Corps Regulatory Permit Application Receipt, NWP-2024-237 (Boise Valley Fly Fishers Lower Owyhee Gravel Augmentation)
Thu, May 2, 2024 at 4:35 PM
From: White, Melody J CIV USARMY CENWP (USA)
To: "conservation@bvff.com" , "jblustain@blm.gov" cc: : "Holecek, Alexandra CIV USARMY CENWP (USA)"
U.S. Army Corps of Engineers Portland District Regulatory Branch Portland Permit Section Regulatory Permit Application Receipt Project Name: Boise Valley Fly Fishers Lower Owyhee Gravel Augmentation Corps Application ID Number: NWP-2024-237
After preliminary evaluation of your application, we may contact you if additional information is required. Please refer to the Corps Application Identification (ID) Number above when you contact this office regarding your project/property.
Please direct all inquiries and comments to the Project Manager listed below.
Project Manager: Alex Holecek
Melody White
Portland Permits Section Chief Regulatory Branch U.S. Army Corps of Engineers - Portland District 333 S.W. First Avenue, P.O. Box 2946 Portland, OR 97208-2946 Phone: 503-808-4385 | Cell: 503-201-0797 Melody.J.White@usace.army.mil
Restoring Winter Flows to the Les Bois Side Channels
By Troy Pearse, Conservation Committee Chairperson
Conservation@BVFF.com
In 2017, after extended high water flows from Snowmageddon runoff, BVFF anglers recognized that 2 side channels behind the old Les Bois racetrack at Expo Idaho no longer flowed during the winter. This was very concerning because the 2 side channels represented a mile of premium trout spawning and rearing habitat. In 2019, BVFF started talking with Idaho Fish and Game, and although they shared our concern, they said they needed concrete evidence that the side channels used to flow during the winter. In 2021 we found dated aerial photography that clearly shows both side channels used to flow during the winter, as shown in the figure below, which gave IDF&G the evidence they needed.
Last Spring, BVFF monitored the side channels as river levels came up and documented that the upper side channel flows through with very little inflows, but the lower side channel has more high-spots that kept water from flowing until the main Boise River was higher. Given this information, the project team recommended focusing on restoring flows to the upper side channel first and then applying lessons learned to the lower side channel.
One thing Zach Kirk, County Engineer from Ada County Development Services, noticed while we were documenting the side channel rewatering last year is there were some juvenile fish in the deeper pools that had survived the winter. We wanted to know more about the fish stranding in this disconnected side channel so last Fall, after flows dropped for the winter, IDF&G electro-fished the side channels and rescued trout that were stranded in the disconnected pools. Over the following winter, BVFF monitored two of these stranding pools and found that the water levels were relatively stable, and that dace and shiners (minnows) were able to survive the winter. This means the pools were connected to groundwater which was able to keep adequate oxygen levels for fish to survive, which is an important learning that stranding does not necessarily mean mortality if the pools are connected to groundwater. It also helps if the pools have some depth and enough woody-cover for the fish to avoid predation from birds like mergansers and herons. The location of the stranding pool study is shown on the aerial photo above and the photos below show the stranding pool levels last November and this March.
Getting permits to work in the river is expensive and takes time. This Fall the Flood District obtained the permits needed to dig the side channel entry test-pits and we were able to get good data on substrate and depth-to-groundwater that will help with modeling and plans for excavating the side channels. Here is the new Flood District Manager, Mark Zirschky, monitoring the test-dig at the top of the upper Les Bois side channel. The flood district is interested in helping this project both because they are great partners who want to help improve trout habitat and because they recognize that when side channels like this lose their carrying capacity the overall flood risk on the river increases. This year, BVFF volunteers again monitored the side channels as flows on the Boise River increased and rewatered the side channels. We gathered cross-sectional depths and flows to document where water will go once the side channel entry is excavated, which will help guide the river restoration work and possible trout habitat improvements such as adding spawning gravel or woody cover. We also documented where the river crossed the first high-spot in the lower side channel, to help guide the excavation at that location. Here is the BVFF crew (Klaus Kissman, Jeff Jones, Tim Opp and Mike Stahl) taking measurements at the entry to the upper Les Bois side channel. Meanwhile George Butts was in the lower side channel photo-documenting the water as it crossed the first high spot.
Side channels are important for trout spawning and rearing. They tend to have more spawning size gravels available as well as better woody-cover which improves fry survival. IDF&G does a yearly fry survey on the Lower Boise River and they find 7 – 10 times the fry density in side channels as they do in the main river, which reinforces how important side channels are to the trout population. Restoring side channels is one of the best ways to improve the trout population, but it is a difficult undertaking, and it couldn’t happen without cooperation and leadership from multiple agencies. BVFF is very excited to be a part of this project team and would like to thank Idaho Fish and Game for their leadership; Flood District 10 for their efforts to lead the excavation work; and the City of Boise for helping fund the river modeling necessary to do this complicated project. If all goes well, we could see the upper side channel excavation this upcoming winter!
Conservation Corner
by Troy Pearse, Conservation Committee Chairperson
The last few years, BVFF has been working at the Diane Moore Nature Center. It has been a great match for our club mission of fly fishing access, education, and conservation--and the more time our members spend there, the more they love it.
The 2 ½ mile section of river between the New York Canal Diversion Dam and Barber Dam is different from the rest of the river. Much of it resides in the Barber Pool, which is a wildlife preserve on the outskirts of the City of Boise with very little public access. And while IDF&G regularly stocks 30,000 trout a year on the Boise River below Barber Park, they rarely stock the river above that. But even though the river hasn't been stocked,
Every few years Idaho Fish and Game asks the public for input on their fishing regulations and fisheries management plan. Initially the club wanted to propose that IDF&G manage the reach for trophy-sized wild trout, which means… (Pick up reading here) that any trout under 20" would need to be released. However, after talking with IDFG fish biologists Art Butts and Tim D'Amico we learned that they did not think changing the regulations would meet the trophy trout size goals (and therefore IDFG wouldn't be willing to change them). Based on their feedback the club decided to focus on wild trout management in this section and proposed that the section of river have a reduced bag limit and be closed for spawning season.
The club conducted an angler survey to see if local anglers supported regulation changes for this stretch of river. We got a good number of responses from fly, lure and bait anglers with 94% of them supporting regulation changes. For more details, see this article on our Conservation Blog HERE.
The Owyhee drainage has had two great back-to-back snow years. Last year the reservoir was so low that it didn't fill, but this year is a different story. We had great carry-over in the reservoir and with all of the snow this season the reservoir is going to over-fill, which means the lower Owyhee river will get some much needed flushing flows. Flushing flows are particularly important on the Owyhee because over time fine sediments have accumulated from dry side channel blowouts, which is hurting the bug habitat and trout spawning habitat. Figure-1 below shows the reservoir levels and you can see how much more water we have this year compared to last.
The Owyhee Irrigation District has started ramping up flows and many are wondering how high they will go, and how long they will be too high to fish. To make an educated guess, let's take a look at the reservoir carryover, snowpack and flows from 2017 and 2019, which were the last 2 high water years.
Here is the snowpack graph for the upper Owyhee drainage. (You can click on any graph to get a full-size version.)
Although the reservoir didn't fill last year, it did come up 31 feet between mid-March and the end of June. Right now the reservoir is 13 feet from full, and the snowpack potential for this year is very similar to last year, which means there could be an 18 extra feet of water to spill! (Note: Reservoir fill rates aren't linear, so this isn't exactly accurate...but you get the point. There is a lot of extra water up in dem der hills! )
Comparing the current Owyhee reservoir level to 2017 and 2019 (the last 2 times we had high flows), you can see that the reservoir elevation this year is similar to 2017, and our runoff this year hasn't even started.
Given that the Upper Owyhee drainage has significantly more snow this year than it did back in 2017, I would expect we will see flows at or above what was released in 2017. Here is a look at spring flows from 2017, 2019, 2023 and so far in 2024. Hold onto your hats, I think we have some high water coming soon!
Don't worry about the fish getting blown downriver. Unlike the Boise River which stays in bank until 7,000cfs and gets high river velocities, the Owyhee jumps out of bank around 2,000cfs, spreads out and the river velocity don't increase as much so trout have plenty of places to get out of the flow in the willows. When the river comes down, fishing will be even better than before. The bug hatches will improve, and I expect we will have some crappie in the river to chase as well. There is no way to tell, but I think the high water might also help clean out the Saprolegnia fungus that has been infecting brown trout after they spawn. Keep yer fingers crossed!
As the reservoir gets close to filling they divert some water through the Dam Ring Gate Spillway, which locals call the "Glory Hole". If you haven't seen it, it's worth taking a drive up to see. Here is a little more info about it.
On March 9, the BOD and Officers submitted to IDFG a proposed fishing regulation change that impacts the Boise River reach from the Diversion Dam below Lucky Peak Reservoir downriver to the Barber Dam.
This unique section of the main Boise River holds both wild rainbow trout and whitefish and is not regularly stocked with hatchery fish. We are excited to be involved in the conservation of this fishery for anglers of all types.
Here are links to the Wild Trout Proposal and the BVFF Angler Survey:
BVFFWildTroutProposalToIDFG.pdf
BVFFAnglerSurvey.xlsx
BVFF’s Redd Count and Mapping project wrapped up at the end of December. The club did 7 day-floats from Willow Lane (in mid-Garden City) down to Star to count and mark redds. Thanks to Johnny Rogers, George Butts, Jeff Jones and Klaus Kissman for their help. We delivered a few updates to the Flood District’s Redd-Map as well as discussed the possibility of repurposing a few downed trees into side channels for trout habitat. We are grateful to have such great partners who care about protecting and improving trout habitat in the Boise River. Figure-1 shows a high level map of the larger redd-zones we are tracking on the Boise River. For more details about BVFF’s “Redd Protection Program” with the Flood District, see this conservation blog article.
One thing I was looking for this year was how much new gravel the high spring flows stirred up. From what we observed, new gravel recruited from last spring’s high water was primarily deposited at “high water locations”, which are out of the water during the low flows of winter and unavailable for brown trout to spawn in November and December, but, this gravel will be available for rainbow trout to spawn when the flows come back up in the spring. We did see some changes to the river from high water which impacted brown trout spawning, including:
Below Glenwood bridge the Boise river splits into 2 channels that flow around Eagle Island, as shown in the photo below. The north channel has many more small twists and turns than the south channel, which causes the river to drop more gravel and improves trout spawning habitat there, resulting in more spawning activity (which you can see by how many redd-zones the north channel has on the map). The amount of water entering the north channel varies from year-to-year depending on cobble accumulations at the head of Eagle Island. Table-2 shows the flows in November of 2022 vs 2023 and you can see how the north channel got more water this year, which made more spawning habitat available to the brown trout and is likely the reason we saw more spawning activity in the north channel this year. Brown trout are known to migrate to find spawning habitat and based on the redd counts the last 2 years it looks like some of them may have decided to spawn in the north channel this year because of the favorable conditions.
Many of the brown trout redds on the Boise River are close to the bank where the river has recruited gravel, like the redds shown in the photo below. Because of this, water flows are a big factor in what bankside spawning habitat is available to brown trout in the winter. Low winter flows dewater some side channels and as water levels go down the river recedes from the banks where much of the spawning gravels are located.
In the 1980s and 90s, Idaho Fish and Game worked to establish minimum winter flows in the Boise River which significantly improved the wild trout populations because it brought water levels up and improved access to trout spawning and rearing habitat. When we have good reservoir carryover conditions (like this winter) the Boise river typically runs around 270cfs - 280cfs at the Glenwood Bridge gauge during the winter but in drought years that drops to around 210cfs or even lower, which dewaters the banks more. IDFG has some water rights in Lucky Peak and has been investigating increasing the minimum winter flows to 300cfs to improve trout spawning and over-wintering habitat which would be a great improvement for the wild trout on the Boise river and I would love to see it happen—even if it only happened on years when we have a good reservoir carryover.
Last week I got the opportunity to help Tim D’Amico, Idaho Fish and Game fisheries biologist, with a trout fry (electro-fishing) survey on the Boise River side channel where BVFF has been working on trout habitat improvements (see this Conservation Blog article for details). We surveyed the same 3 spots as last year--one at the top, one mid-channel and one in the lower section. The total fry numbers were down compared to last year, but that was mainly because the tree across the channel at the lower site where we had found so many trout fry last year had pushed downstream and we only found a couple of trout in that zone. The fisheries biologist said that was one of the limitations of their fry survey--that changes to the river can impact the productivity of a sample site. (See this Conservation Blog article for more information about last year's fry survey.)
One of the habitat improvements we did on the side channel last February was to place a tree root-wad in the upper section, with the assistance of the flood district’s excavator. This year’s high runoff flows scoured out a good hole there and we found both fry and 1–2-year-old brown and rainbow trout holding around the root-wad. Seeing the age 1-2 trout is extremely exciting because it is a good indicator that our side channel habitat improvements are helping trout over-winter survival, which IDFG tells us is the bottleneck for improving recruitment from fry into adulthood.
I passed along photos and kudos to the flood district and will be working with the new flood district manager, Mark Zirschky, to identify other downed trees that can be possibly be repurposed/placed in other locations to improve trout habitat during their winter operations. This opportunity to improve woody cover in the Boise River is extremely important and I am grateful for their forward thinking and willingness to help protect and improve trout habitat in the Boise River. (See this Conservation Blog article for more information on this awesome project!)
I had been concerned that the high flows from the early release of water in April would be a problem because it occurred so close to brown trout fry-out (when the fry leave their redd/nest), but we found lots of brown trout fry indicating that the side channel and woody cover was a good place of refuge from the high flows. So far, I haven't seen any brown trout redds in our side channel this Fall, but I have seen some in the main river. During the survey we found one large (20") brown trout at the end of the side channel, who appears to be staged to spawn. Last year most of the spawning in the side channel happened in December, so I am hopeful we will see some redds soon.
BVFF will start floating the Boise river this week to document brown trout spawning and update the redd-zone map for the flood district so they can avoid the redds during their winter maintenance. The high spring flows recruited new gravel from the river-banks and it will be very interesting to see where we find brown trout spawning this year.
In December I will be participating in a trout fry survey at the Diane Moore Nature Center side channel (the same place we did our snorkel survey this summer). Flows are down significantly in that side channel, but there are some deep pools and lots of woody cover. The total number of trout fry we saw in that side channel last summer was amazing, and there is lots of good woody cover for them, so I expect we will see an increase in the adult population of trout there over the next few years. For more information about this successful side channel restoration, see this Conservation Blog article.
