A folder of PDFs is where evidence goes to die.
Every document here carries one or two sentences saying what it proves and why a reviewer should care. That is the whole point. A Trout Unlimited reviewer has limited time and no particular reason to trust us yet — the catalogue has to do the explaining.
- In hand
- 11
- Still to obtain
- 17
Yes. And then a harder question.
Trout Unlimited's Priority Waters language is consistently about wild and native trout, so the case turns on whether trout reproduce here. They do, and the evidence is federal. A USGS study found wild juvenile Rainbow Trout in every year of its survey, hatched from spawning between late January and mid-April, within the first 4.5 km of the 19-kilometre tailwater. Wild juveniles have been recorded here since 2006.
What is not established is recruitment — whether enough of those fish reach adulthood for the population to sustain itself. The same study measured weekly survival under 80% and says further research is needed before anyone calls this self-sustaining. We quote that limit rather than skating past it, because a reviewer with a fisheries background will read the paper.
Framed honestly, the gap argues for designation rather than against it. Reproduction at the southern edge of trout range is rare enough to be worth protecting, and whether it recruits is a tractable question that TU resources could actually answer.
The catalogue
26 documents
- StudyLong, Hoback, Reed & Farling — USGS Cooperator Science Series 133-2018 · 2018
Assessing wild juvenile trout ecology in the lower Mountain Fork
The cornerstone of the entire case, and it is federal. Wild juvenile Rainbow Trout were found in every year of the survey — but only within the first 4.5 km of the 19-km tailwater, hatched from spawning between late January and mid-April. Wild juveniles have been recorded here since 2006. Read the conclusion before quoting it: the authors measured weekly survival under 80% and state that additional research on recruitment to adulthood is needed before the population can be called self-sustaining. Reproduction is proven. Recruitment is the open question — and closing it is exactly the sort of work a Priority Waters designation would fund.
View at source ↗Fishery · Habitat - StudyLong, Starks, Farling & Bastarache — USDA Forest Service, Southern Research Station
Assessing the Potential for Rainbow Trout Reproduction in Tributaries of the Mountain Fork River below Broken Bow Dam
The companion study, looking at tributaries rather than the main stem. It identifies Bee Branch and the Spillway Creek offshoot as the coldwater refugia where wild juveniles survive a southern Oklahoma summer. That turns an abstract conservation ask into a specific one: protect these named tributaries, for this measurable reason.
View at source ↗Fishery · Habitat · Water quality - PressWildlife Management Institute
Tight Lines: Evaluating Rainbow Trout Fishing in Oklahoma
Covers the current collaborative research on LMFR trout population dynamics with Oklahoma State University and ODWC. Valuable because it shows the science here is live rather than historical — there is institutional attention on this river now, which a designation would build on rather than start from scratch.
Request from Coalition archiveFishery - StudyNot yet studiedNot yet obtained
Recruitment to adulthood — the unanswered question
The one piece of science nobody has. We can prove trout spawn and hatch here. We cannot yet prove enough survive to adulthood for the population to sustain itself. The USGS authors flagged exactly this gap and their survival estimates were likely biased low by declining catchability of larger fish. Framed honestly this is an argument for designation rather than against it: it is a tractable question that TU resources could answer.
Request from ODWC / OSU / USGSFishery - Management planLower Mountain Fork River Foundation / ODWC
Evening Hole restoration — 2,700 feet of rebuilt channel
Proof that habitat work succeeds on this specific river. Stream narrowing and a constructed wetland measurably reduced water temperature — directly addressing the thermal stress that most threatens wild recruits. A reviewer asking 'would restoration even work here' has an answer that already happened.
Request from LMFR FoundationHabitat · Water quality - RegulationU.S. Army Corps of Engineers · 2026
USACE nationwide permits — bank stabilisation and five rock weirs
Possibly the most practically valuable document here. Permits were cleared in June 2026 for bank stabilisation and structural repair of five rock weirs between Bluff Hole, Evening Hole, Hickory and Savory. Permitting is usually the slowest, least certain part of any restoration project; on this river it is already finished. The work is shovel-ready and waiting for a funder.
Request from USACE Tulsa DistrictHabitat · Regulation - Chapter recordLower Mountain Fork River Foundation
Rainbow and brown trout rearing pens
Part of the Foundation's twenty-year project record, alongside conservation pools on Spillway Creek, the Lost Creek construction and post-flood recovery work. Evidence that volunteer-led infrastructure on this river gets built, not just proposed.
View at source ↗Fishery · Habitat - Agency surveyOklahoma Department of Wildlife ConservationNot yet obtained
Trout population survey, Lower Mountain Fork
Standing stock, size structure and species composition by zone. Establishes that the fishery is real and measurable rather than anecdotal.
Request from ODWC fisheriesFishery - Agency surveyOklahoma Department of Wildlife ConservationNot yet obtained
Creel survey — angler effort and catch rates
The backbone of both the fishery case and the economic case. Angler days, catch rates, and crucially where anglers travel from — which is what turns a fishing report into an economic argument.
Request from ODWC fisheriesFishery · Recreation & access · Economics - Agency surveyOklahoma Department of Wildlife ConservationNot yet obtained
Trout stocking records by zone and year
Species, numbers and timing. Needed honestly: it shows the scale of the state's existing investment, and it establishes the baseline against which any natural reproduction is measured.
Request from ODWC fisheriesFishery - Monitoring dataU.S. Geological Survey
Continuous gauge record — Mountain Fork near Eagletown (07339000)
Discharge, gauge height and water temperature, continuously, with decades of history. This is the only genuinely unimpeachable dataset in the library, and it already drives the live readouts on this site.
View at source ↗Flows & operations · Water quality - Monitoring dataTo be determinedNot yet obtained
Summer water temperature profile, dam to thermal limit
Defines how far downstream the coldwater fishery actually extends, and how close it comes to failing in a drought summer. This is the number that sets the real length of the resource — and the twelve-mile figure used on this site depends on it.
Request from ODWC / OWRBWater quality · Habitat - Management planU.S. Army Corps of Engineers, Tulsa DistrictNot yet obtained
Broken Bow Dam release schedule and hydropower operations
Generation scheduling, minimum flows and release temperatures. Every habitat question on this river runs through how the dam is operated, and any conservation win will involve the Corps as a partner rather than an opponent.
Request from USACE Tulsa DistrictFlows & operations · Habitat - Monitoring dataOklahoma Water Resources Board / DEQNot yet obtained
Integrated water quality assessment (305(b) / 303(d))
The state's own assessment of whether this reach meets its designated uses. Carries weight precisely because it is not ours.
Request from OWRBWater quality - Economic analysisOklahoma Department of Wildlife ConservationNot yet obtained
Oklahoma trout licence sales and revenue, multi-year
The best available proof that people care about this resource, expressed in a number nobody can argue with. A multi-year trend matters far more than a single year — the direction is the argument.
Request from ODWC licensingEconomics · Recreation & access - Economic analysisOklahoma Tourism & Recreation DepartmentNot yet obtained
Beavers Bend State Park visitation figures
Establishes the scale of public use around the river, and connects the fishery to a destination the state already promotes and funds.
Request from Oklahoma TourismEconomics · Recreation & access - Economic analysisOklahoma Tax CommissionNot yet obtained
McCurtain County lodging and sales tax trend
Turns 'the river brings people here' into a figure a county commissioner recognises. Strongest when paired with the creel survey's angler-origin data.
Request from Oklahoma Tax CommissionEconomics - Economic analysisTo be conductedNot yet obtained
Survey of guides, fly shops and lodging on the river
Nobody has counted the businesses that depend on this fishery. A short survey the chapters run themselves would be original evidence — and original evidence is more persuasive than another citation.
Request from CoalitionEconomics · Recreation & access - RegulationOklahoma Department of Wildlife ConservationNot yet obtained
Trout area regulations and zone boundaries
The legal shape of the fishery: where the zones are, what tackle and limits apply, and when. The downstream section of this site states mileages that must be checked against this document.
Request from ODWCRegulation · Recreation & access - MapOklahoma Department of Wildlife ConservationNot yet obtained
Trout zone and public access map
Shows the reaches in question and where the public can actually reach the water. Access is half of why a fishery matters to a community.
Request from ODWCRegulation · Recreation & access · Habitat - RegulationOklahoma Department of Wildlife Conservation
Lower Mountain Fork River Trout Area — official area page
The state agency's own page for the trout area. Confirms both brown and rainbow trout as species of interest and gives a 12-mile shoreline length. It carries no zone boundaries or stocking numbers — those sit in the separate Trout Regulations, which is still outstanding.
View at source ↗Fishery · Regulation · Recreation & access - Economic analysisOklahoma Tourism & Recreation Department
Lower Mountain Fork River — state tourism listing
The state describing the river as a destination in its own words: year-round trout fishing over twelve miles from Broken Bow Dam down to the US-70 bridge, about five of those miles inside Beavers Bend State Park. Useful precisely because Oklahoma is already promoting what we are asking TU to protect.
View at source ↗Recreation & access · Economics - Chapter recordLower Mountain Fork River Foundation · 2002
Lower Mountain Fork River Foundation — projects and history
A volunteer foundation has been improving this exact fishery since 2002 — rearing pens, the Evening Hole Project, conservation pools on Spillway Creek, Lost Creek construction — with its own money matched by the Federal Sportfish Restoration Fund and the work carried out by ODWC. Its volunteers come from Texas, Oklahoma, Louisiana and Arkansas. This is the strongest existing proof that the river already attracts sustained multi-state volunteer investment.
View at source ↗Habitat · History - PressTailwaters Fly Fishing · 2024
Guide interview — Morgan Prater, Beavers Bend Fly Shop
Anecdotal, and catalogued as such — but it carries the natural-reproduction lead, and it establishes the catchment: the LMF is the closest year-round trout fishery to Dallas-Fort Worth, 200 miles and about three hours away. It also records the December 2015 flood that destroyed the fly shop, which belongs in any honest account of the river's vulnerabilities.
View at source ↗Fishery · Economics · Recreation & access - StudyTo be determined · 2015Not yet obtained
December 2015 flood — damage and recovery record
The flood of 26 December 2015 washed away Beavers Bend Fly Shop and reshaped the river. A proper record of what it did to habitat and to the local economy would be the clearest available illustration of what is at stake and how the fishery recovers — the kind of resilience story that strengthens a conservation case rather than weakening it.
Request from USACE Tulsa District / ODWCFlows & operations · Habitat · History - Chapter recordOklahoma TU chaptersNot yet obtained
TU chapter project history on the Lower Mountain Fork
Prior investment is a strong argument. Volunteer hours, dollars spent and projects completed show Trout Unlimited would be deepening work already underway rather than starting cold.
Request from Chapter leadershipHabitat · History
Not all sources weigh the same
Three secondary sources repeating one another is not corroboration — it is usually a single unsourced figure echoing around. Each source below is graded, and the grade is not flattering by default.
- PrimaryOklahoma Department of Wildlife Conservation
Lower Mountain Fork River Trout Area
The state agency's own page for the trout area. Confirms brown and rainbow trout as species of interest and a 12-mile shoreline length, but carries no zone boundaries or stocking figures — those live in the separate Trout Regulations, which still needs to be obtained. Lists the Fisheries Management Office at (918) 683-1031.
Open source ↗Read 2026-11-06
- PrimaryOklahoma Tourism & Recreation Department (TravelOK)
Lower Mountain Fork River
The state's own tourism listing. Useful because it is the state describing the river as a destination in its own words: year-round trout fishing over a 12-mile reach from Broken Bow Dam down to the US-70 bridge, roughly five miles of it inside Beavers Bend State Park.
Open source ↗Read 2026-11-06
- PrimaryLower Mountain Fork River Foundation
Lower Mountain Fork River Foundation
A volunteer foundation that has worked on this exact river since 2002, with a documented project record and federal match funding. Primary for its own activities. See the strategy note in data/documents.ts — this organisation's absence from the coalition would be conspicuous.
Open source ↗Read 2026-11-06
- Secondary — verifyRiverScout
Lower Mountain Fork — river profile
A third-party paddling and fishing app. Carries specific figures — 100,000+ trout stocked annually as of 2024, an Oklahoma Blue Ribbon Trout Stream designation, Broken Bow Dam completed 1968 — but cites no source for any of them, and the page itself says its ranges 'need community verification'. Treat every number here as a lead to confirm with ODWC or USACE, not as a citation.
Open source ↗Read 2026-11-06
- Anecdotal — not evidenceTailwaters Fly Fishing (The Journal)
Guide Spotlight — Morgan Prater, Fishing the Lower Mountain Fork River
An April 2024 interview with a Beavers Bend Fly Shop guide. Not evidence — but it contains the single most valuable lead in this project: a working guide stating that studies exist showing natural reproduction of both rainbow and brown trout, and that this is the southernmost reproducing trout stream in the United States. Also gives the DFW catchment (200 miles, ~3 hours) and the December 2015 flood.
Open source ↗Read 2026-11-06
- PrimaryU.S. Geological Survey — Long, Hoback, Reed & Farling
Assessing wild juvenile trout ecology in the lower Mountain Fork (Cooperator Science Series 133-2018)
The cornerstone document. Federal, peer-reviewed, and specific: wild juvenile Rainbow Trout were found EVERY year of the study, but only within the first 4.5 km of the 19-km tailwater, from spawning between late January and mid-April. Wild juveniles have been recorded here since 2006. Read the conclusion carefully before quoting it — the authors found weekly survival under 80% and state that 'additional research on recruitment to adulthood would be required' before calling the population self-sustaining. The reproduction is documented; the recruitment is not.
Open source ↗Read 2026-11-06
- PrimaryUSDA Forest Service, Southern Research Station — Long, Starks, Farling & Bastarache
Assessing the Potential for Rainbow Trout Reproduction in Tributaries of the Mountain Fork River below Broken Bow Dam
The companion study, looking at the tributaries rather than the main stem. This is where Bee Branch and the Spillway Creek offshoot come in as coldwater refugia — the places wild juveniles actually survive a southern Oklahoma summer. Together with the USGS report it makes the habitat argument concrete: protect specific, nameable tributaries, not a general stretch of river.
Open source ↗Read 2026-11-06
- Secondary — verifyWildlife Management Institute — Outdoor News Bulletin
Tight Lines: Evaluating Rainbow Trout Fishing in Oklahoma
Covers the active collaborative research on LMFR trout population dynamics with Oklahoma State University and ODWC. Useful because it shows the science is live rather than historical — there is current institutional attention on this river that a Priority Waters designation would build on rather than start.
Open source ↗Read 2026-11-06
- PrimaryCoalition working document
TU Priority Waters Nomination Dossier — documentation requirements
The coalition's own framework, setting out the three pillars a nomination has to satisfy: verified wild trout populations, viable restoration projects, and local volunteer capacity. This is the structure the whole site now follows.
Open source ↗Read 2026-11-06
- PrimaryU.S. Geological Survey
Mountain Fork near Eagletown, OK — USGS-07339000
Continuous discharge, gauge height and water temperature with decades of record. The most defensible dataset available, and already wired into this site's live readouts via lib/usgs.ts.
Open source ↗Read 2026-11-06