Project Need
Need For Project:
Lower Logan River - The Trapper Park Restoration Project (Phase 1A), currently under construction, has been a demonstration project by showing how diverse interest groups of agricultural, development, commercial, water district, state and federal agencies, and special interest groups can join to successfully complete a beneficial project for the common good. Upon completion of Phase 1A, approximately 6,000 feet of the Logan River will have been stabilized. Encroachment by invasive plant species (Crack Willows , which have prevented or eliminated mid-level and ground level vegetation and other native species) will have been substantially reversed. Since beginning construction of Phase 1A, it has been found that necessary bank stabilization and permitting efforts were underestimated. This project proposes to stabilize an additional 1,500 ft of the Logan River and cover additional consulting expenses (Phase 1B). This project also includes Phase II design and permitting activities for the adjacent downstream segment of the Logan River. In coordination with the UDWRe and the USACE, strategic areas focusing on forested wetlands, palustrine wetlands, and potential Ute-ladies'-tresses habitat would be targeted for enhancement. The Logan River Plan specifically mentions that this stretch of river has problems with bank erosion and Crack Willows. This project will serve the goals of the plan. Project success will be determined from ecological assessments conducted before and after the project, as well as from drone surveys.
Paradise Irrigation - Diversion dam is structurally failing and continued scour risks flanking the dam, dam is a total barrier to all fish passage, impaired sediment passage requires heavy equipment to enter the water at least once annually, and flows diverted are not measured at the point of diversion.
Piping has exceeded its design life and failing resulting in water lost in transmission and service interruptions.
Adding a pump station will resolve that users do not receive their water at times, delivery pressures are not optimal, and maintenance could be reduced.
Measurement of stream inputs above Porcupine Reservoir are unknown and collected data will be used to inform delivery.
Sportsman's Paradise - The diversion dam is structurally failing and continued scour risks flanking the dam, active bank erosion at the dam and downstream, dam is a total barrier to all fish passage at all flows, flows diverted are not measured at the point of diversion.
Objectives:
Lower Logan River - Phase 1A will conclude in March 2026.
Phase 1B will begin in August 2026 and conclude in March 2027. All activities are already permitted. As work began in August 2025 in the previous phase, an unexpected amount of concrete rubble, tires, and old car bodies were unearthed, which has led to unforeseen costs. There have also been additional erosion areas that were identified. This project phase will consist of cleaning and restoring the river by removing old car bodies, concrete rubble, car tires--and other "manmade bank stabilization efforts" that are failing and environmentally unacceptable. These would be removed and replaced with rock riprap, with the voids filled with fine soils. These areas are to be planted with species that have been approved by US Fish and Wildlife. The banks will be benched and sloped back to restore the flood plain connectivity where possible. The project will restore banks which have been altered by adjacent property owners (attempting to address debris accumulation), sediment accumulation, and issues associated with years of impact from crack willows choking the channel. Crack Willows are the only invasive species that grow into the channel, with roots that invade into the channel. Additionally, because of the extremely fragile nature of the Crack Willows (thus the scientific part of the name "fragilis") and the breakage of large and small tree limbs during weather events, the river becomes blocked causing problems for private property owners.
Phase II design and permitting will begin in July 2026 and conclude by or before June 2027. The channel sizing would be determined by the completion of hydraulic shear analysis in a HEC-RAS 2D model and would include appropriate fine materials to support the aquatic insects associated with the river. Additionally, the head cuts would be stabilized with rock checks to simulate natural river structure and to create fish habitat (rather than just energy control structures). The overall objectives of these activities will be to improve water quality through the reduction of erosion and improvement of aquatic habitat.
In addition to its ecological benefits, the proposal includes installation of a public trail within the Kunzler Conservation Easement, providing safe and managed access for the public to experience the river corridor and appreciate the restoration efforts that have been completed and are proposed. The trail will enhance recreational opportunities in synergy with the long-term protection and stewardship of the conservation easement.
Paradise Irrigation - Diversion dam reconstruction will enable fish passage on a portion of the river that has already had investment to improve fisheries habitat, enable better control of the diversion of flows, improve sediment conveyance, decrease the risk of flanking, nearly eliminate the need for heavy equipment to entering the river, improve water quality, and measure flows diverted.
Piping replacement will curtail the amount of water needed to be diverted from the river keeping more flows in-stream, improve service to customers (better pressure, less disruptions), reduce maintenance levels of expense and effort for the Canal.
Adding the pump station will improve service to customers (better pressure, less disruptions), reduce maintenance levels of expense and effort for the Canal.
Precise measurement of flows will inform management and delivery of water.
Sportsman's Paradise - Diversion dam reconstruction will enable fish passage on a portion of the river that has already had investment to improve fisheries habitat, enable better control of the diversion of flows, improve sediment conveyance, decrease the risk of flanking, improve water quality, measure flows diverted, re-establish bank stability, improve conditions in-stream conditions for fisheries (restore shading, lower water temperature, diversify flow characteristics, lessen turbidity, and increase dissolved oxygen), and benefit avian and insect species as well.
Project Location/Timing Justification (Why Here? Why Now?):
Lower Logan River -- Due to the existing project under construction and the positive feedback from the various stakeholders. There is desire to continue the momentum and efforts to finish the Phase I area and to develop the design and permitting for the Phase II area.
Paradise Irrigation-Commitment of funds from the Owner, problems are escalating and compounding, delivery is impacted by operations on other canals, to be responsive to increased oversight by Div of Water Resources, and to support the aquatic community the Canal benefits from.
Sportsman's Paradise - Commitment of funds from the Owner, problems are escalating and compounding, delivery is impacted by operations on other canals, to be conservation minded, and to support the aquatic community the Canal benefits from.
Relation To Management Plan:
Lower Logan River- The Logan River Restoration Conservation Action Plan (CAP) identified the need for replacement of the invasive Crack Willow in the Lower Logan River where the project is located. This project promotes native vegetation planting by clearing small groups of the Crack Willow and replacing with native species that improve floodplain function, water quality, aesthetics, and habitats for aquatic and avian species. CAP also identified areas that were susceptible to erosion and thereby create downstream water quality problems. Project activities directly address these concerns from the Logan River Restoration Conservation Action Plan.
Both Paradise projects fall within the geographic area covered by the Little Bear River Watershed TMDL created by the Utah Dept of Environmental Quality, Division of Water Quality, TMDL Section. Aims of the TMDL are to reduce Phosphorus and Hydrologic Modification. Improving the riparian buffer adjacent to the river, keeping more water in the river, reducing solar exposure keeping water temperatures lower all lead to lower phosphorus levels in the water.
Re-establishment of a riparian buffer, increasing in-stream roughness , diversifying hydraulic conditions in-stream, preserving more water in-stream, and monitoring and measuring flows all reduce hydrologic flashiness of a system, stabilizing conditions for plant and fisheries communities, benefiting water quality, and improving conditions for adjacent insect and bird populations.
Both the TMDL objectives' benefits realized higher up in the watershed will travel down through the system positively impacting Hyrum Reservoir, the Bear River, and ultimately the Great Salt Lake all of which have their own management plans.
Fire / Fuels:
All projects are anticipated to benefit the riparian corridor by keeping more water in-stream for a longer duration. This benefit also positively affects the watershed downstream. Healthy stream corridors can function as fire breaks. Shrub, brush, and tree canopy compete with and shade out some invasives. Finally, flows from the river support agriculture, which, while anthropogenic, do compete with invasives and some agricultural producers work to control weeds and invasives.
Water Quality/Quantity:
Lower Logan River - This project will mainly improve sediment loading rates and temperature. Banks will be stabilized so there will be less sediment being eroded into the stream. A PLET analysis indicates a potential reduction of 179 tons of sediment. The temperature in the water should decrease once all of the new vegetation has been successfully planted and a more shaded understory has been established. This will serve to improve the macroinvertebrate and fisheries populations.
For the Paradise projects, one specific long-term goal in the TMDL is to, "Achieve long term stability of stream channels, streambanks and shorelines throughout the watershed and restore a quality fishery. 1. Reduce sediment from streambank erosion by restoring the stability of 10 miles of streambank along the Little Bear River and its tributaries. 3. Install vegetative plantings on 35 acres of riparian habitat." The actions and benefits from these projects are in-line with that objective and those action items. All proposed activities should increase the quantity of water left in the river and reduce the amount diverted and dispersed across the landscape.
Compliance:
Archaeological clearance will be required prior to any work being done.
Lower Logan River - NEPA Compliance and USACE permitting has been achieved for the Phase I activities of this project.
Proposed actions for both the Paradise projects comply with the Utah DEQ TMDL. At this time, there are no federal funds committed to these projects so NEPA is a non-factor, that may not always be the case. We are requesting a phased approach to the funding and the work to allow for the cultural resources and biological permitting process to occur as required. At this time, we have identified a stream alteration permit for UT Div of Water Resources and a Cache County Floodplain permit as the key compliance requirements.
Methods:
Lower Logan River -- Bank Sloping will occur by removing concrete or car armoring and the bank will be sloped back and planted with appropriate pole plantings and seed mixes based on a detailed field survey and the completion of a concept HEC-RAS 2D model. Wetland Seeding and Revegetation will occur by removing Reed canary grass and invasive species and seeding native riparian and wetland species. Benching and Reconnection will re-establish a flood plain by benching and reconnecting to the new conservation easement.
Paradise Irrigation- A new diversion will be constructed, measuring flumes and logging equipment installed, pipelines will be pipe burst into place and/or appurtenances installed via open trench, and the pump station all will be done by a combination of manual labor and heavy equipment.
Sportsman's Paradise - A new diversion will be constructed by manual labor and heavy equipment, the banks will be mechanically graded by heavy equipment, plantings and in-stream rock placement will be accomplished also by personnel and equipment.
Monitoring:
Lower Logan River- After the project is constructed, monitoring would be accomplished by drone flights capturing images and data; detailed cross-section inspections; habitat inspections with the Utah Division of Water Rights Stream Alterations, Utah Division of Wildlife Resources, and Trout Unlimited; and site inspections by the USACE. These activities would be conducted in conjunction with the habitat restoration and mitigation program associated with neighboring projects per the requirements of the nationwide permit the USACE. Results would be documented in the annual mitigation reports, with the USACE documenting vegetative density and restoration success. These results are then published regularly. The coordinated monitoring effort to measure the enhancement to the riparian and river habitat corridor would last approximately 5 years after construction. Upon request, information would be provided to USBR and other interested parties. Key elements of this implementation include:
- The drone flights would be scheduled within the same two-week period of every summer and during the same time of the day so that vegetative cover and solar angle are approximately the same to support an equivalent comparison of the data.
- On-site cross sections would be defined in coordination with the agency teams, surveyed and documented, and then evaluated annually during the same two-week period (ideally during the Ute-ladies'-tresses blooming period) to verify habitat diversity success.
- River habitat would be visually inspected during critical flows to evaluate the effects of the habitat improvements and vegetative growth along the river. These inspections should take place in mid-August annually but would need to be coordinated with the agencies.
- Annual wetlands reports would be required by the USACE and can be provided to the USBR.
Paradise Irrigation-Post-construction, all operations will be actively monitored, used, and implemented. Stream measuring equipment will be periodically interacted with. It is expected the diversion dam, pump station, and pipework will be manipulated daily otherwise during the irrigation season.
Sportsman's Paradise -Post-construction, the diversion will be interacted with daily as head and sediment sluice gates are manipulated regularly. During the winter, there may be less interactions, however water is taken year-round for the aquaculture. The fish ladder will be available for use year-round except perhaps when the gate is (nearly) closed during high water to minimize ingestion of sediment into the canal.
Partners:
Lower Logan River --
Logan City (funding and oversight of project including restoration and recreational aspects)
Cache Water District (administration of Phase I and continual support of Phase II)
Cache County (will participate in Phase II to assess county bridge)
United States Bureau of Reclamation (Watersmart funding for Phase I)
United States Army Corps of Engineers (permitting collaboration)
Trout Unlimited (support in funding acquisition and project planning)
Utah Division of Water Resources (support in habitat creation)
Corporate Landowners (streambank work in Phase I area)
Other Private Landowners (streambank work)
This is not a complete list as this project brings together many different partners and is comprehensive in scale. There will likely be other partners involved in Phase II.
For both Paradise projects, we have already applied for UWIP, we will also be applying for matching funds from UDAF - Ag Water Optimization Grant, Utah Division of Wildlife Resources, Trout Unlimited, NRCS -- Environmental Quality Incentives Program and/or Regional Conservation Partnership Program, Bureau of Reclamation WaterSMART Small-Scale Water Efficiency Projects (SWEP) grants, Utah Association of Conservation Districts. If there is water that is conserved as a result of these efforts, we will be looking to trust water with Great Salt Lake Water Trust/Great Salt Lake Commissioner/Great Salt Lake Watershed Enhancement Trust. Owners will be making up the balance of the needed funds.
Future Management:
Lower Logan River -- Future management of the Trapper Park River Restoration Project will be implemented through continued coordination among local, state, federal, nonprofit, and private partners. Logan City is expected to provide ongoing oversight and support for restoration and recreational components. Maintenance of restored streambanks, riparian vegetation, and public access improvements will be integrated into existing land management and conservation easement frameworks, with participation from corporate and private landowners where work occurs on private property. Regulatory agencies, including the USACE and state partners, will remain engaged to ensure compliance with permits and adaptive management needs. Future management actions will be informed by post-construction monitoring results to support long-term stability, habitat function, and water quality improvements.
Both Paradise entities will continually operate and maintain the infrastructure installed via WRI funding. Replaced head and water control gates, perhaps automated, allow for more precise control of the water that is diverted. On the Paradise system, it is anticipated that water diverted from the river will be reduced as transmission losses are eliminated, more efficient delivery at higher pressures occurs, and more efficient delivery means are able to be taken advantage of as a system goes from open canal delivery to piped. Debris and sediment removal from the fishways and gates may require periodic maintenance, particularly during low water when there is a greater measure of personnel safety.
Sustainable Uses of Natural Resources:
The Lower Logan River effort promotes sustainable use of natural resources by restoring natural river processes while supporting long-term ecological, recreational, and community benefits. Streambank stabilization, floodplain reconnection, and replacement of invasive Crack Willow with native vegetation reduce erosion and sediment loading, protect water quality, and enhance aquatic and riparian habitat. These actions improve the resilience of the Logan River to high-flow events and climate variability, reducing the need for future maintenance or hard infrastructure. The project also supports sustainable public use by providing managed recreational access through a trail within the Kunzler Conservation Easement, allowing the community to engage with the river corridor while protecting sensitive habitats. Together, these efforts ensure that the river's natural resources are conserved and used in a manner that balances ecological health, flood protection, and recreation for current and future generations.
Both Paradise systems aim to have better control at diverting and utilizing water. Both systems will promote fish passage and conveyance of sediment past the diversion structures. The Paradise system will put water to work in a more efficient manner. Soft bank protection methods will be used where appropriate.