One ramp, a stocked trout reach, and a float that ends in a national park

Below Nolin River Lake Dam the Nolin River runs about 7.5 miles to the Green River inside Mammoth Cave National Park; KDFWR files the reach under Edmonson County. KDFWR stocks it with trout — eight thousand across six stockings in the archive year we could read — and lists only brown and rainbow trout on its record, under statewide limits. There is one paved, single-lane, no-fee ramp at the Corps’ Tailwater Recreation Area. There is no live discharge reading for this reach, no pool schedule of its own, and no published coordinate for the dam. Central time applies.

The tailwater in one paragraph

The Corps puts Nolin River Dam “about 8 miles above the Confluence of the Nolin and Green Rivers near the community of Bee Spring”; the Park Service counts “7.5 miles (12 km) of the Nolin River” from the Tailwater Recreation Area “to the confluence with the Green River in the park.” The lake above the dam is published on this site as its own water. KDFWR files the river below as a separate waterbody (wid=80, “Nolin River Lake Tailwater”) with one access site, and the Park Service describes the Tailwater Recreation Area as “a recreation access point for the Nolin River before it flows into Mammoth Cave National Park,” a “small day-use area” that “is managed by the US Army Corps of Engineers.” Treat the lake and the tailwater as related, not the same water.

The ramp, and the closure note that is probably not about today

KDFWR’s access-site record for the Tailwater ramp still says, verbatim: “The Nolin River Lake Tailwater Boat Ramp is temporarily closed due to reduced water levels following the partial failure of Lock and Dam 6 on the Green River.” That is KDFWR’s note, and we print it as KDFWR’s. Three later, dated statements sit beside it:

• NPS, 2026: “In 2016 there was a failure of Lock and Dam No. 6 on the Green River, downstream of the confluence with the Nolin River, and the dam was ultimately removed.” NPS’s Tailwater page (2022): “A paved boat ramp provides access to canoers, kayakers, and boaters wanting to access the national park on the Nolin River.”
• The Corps, reported by WNKY on 20 August 2026: “According to the U.S. Army Corps of Engineers, Louisville District, the boat ramp and the adjacent parking lot will close on the morning of Monday, August 24” for “improvement projects”; “the boat ramp will reopen before Labor Day weekend.”
• The Corps’ own Nolin River Lake social-media post is titled “The Nolin Tailwater boat ramp is now open…” after the Lock and Dam 6 demolition — a lead we could not read or date with our tools, named here for you to check, not as evidence.

The lake’s pool and the dam’s releases — context, not this reach’s own reading

A river reach has no pool elevation. The figures below are the lake’s, printed so you know what the dam is doing to the water below it, and nothing here is a measurement of the tailwater itself.

The Park Service’s own warning, verbatim: “Water levels can change rapidly due to weather (i.e. rise 20-50 feet in the hours and days after a rain event) or due to water release schedules from the Nolin River Dam.” No release-warning system at the dam is described on any page we read; do not assume one exists.

The gauge, and why it does not answer “what is the flow right now”

The tailwater has its own USGS station, 03311000, Nolin River at Kyrock, KY (37.2742157, −86.2508064 — on the ramp; drainage area 703 square miles; operated “in cooperation with the United States Army Corps of Engineers - Louisville District”). It lists two parameters: 00065 gage height and 00010 water temperature. No discharge series is listed. When we read the page on 27 September 2026, the most recent values it displayed were dated 1 August 2026 (gage height 17.03 ft), and the page carries this notice: “The real-time water-quality data will cease for this site, as funding for the data collection ends in late December.” Whether the station is transmitting today is status pending — this site does not treat it as a live feed.

Trout: what the stocking record actually says

The Corps: “Kentucky Fish and Wildlife regularly stocks the Tailwater at Nolin.” KDFWR’s Yearly Trout Stocking Archive, read 27 September 2026, carries these Nolin rows, verbatim:

Eight thousand trout in six stockings across that archive year. The archive groups its rows under species headings that our read did not capture, so this page says “trout,” not rainbow or brown, for each row. KDFWR’s monthly schedule adds: “Stocking dates for streams on Federal Property are not announced ahead of time.” KDFWR’s 2026 trout-stream classification PDF, read directly (not through our fetch tool, which had paraphrased it two different ways), lists the reach on page 8 under “CLASS II STREAMS,” Tailwaters: stream “Nolin River Lake (Nolin River),” county Edmonson, 3.5 miles of trout water, location “Dam to 3.5 mi below,” type “Brown p-g-t / Rainbow p-t” — brown trout put-grow-take, rainbow trout put-and-take. Class II streams are the document’s own words: “high quality trout streams that have a low number of days (≤25) above 72° F in a calendar year… These streams may still provide holdover trout but are not considered exceptional.” The document’s intro text separately names “the Nolin tailwater” among streams “recently added to the Brown Trout stocking list,” which agrees with the table.

The regulation: statewide limits, and the regulation’s own words on why

KDFWR’s record for this water has two rows — brown trout and rainbow trout, both “Statewide Regulations Apply.” The regulation agrees. 301 KAR 1:201, current in-force version, Section 2 makes the statewide limits the default “except as established in Sections 3 through 7,” and Section 3’s lead-in scopes every exception “to the bodies of water listed in this section.” The only subsection that names Nolin is Section 3(55), verbatim: “Nolin River Lake shall extend up Bacon Creek to Highway 178 and to Wheelers Mill Road Bridge on the Nolin River. (a) Largemouth bass and smallmouth bass size limit, fifteen (15) inches. (b) Crappie size limit, ten (10) inches.” That subsection defines the lake’s upstream extent and the lake’s limits. No subsection lists the river below the dam. So the lake’s 15-inch bass and 10-inch crappie limits stop at the lake, and statewide limits apply on this reach. (The Kentucky LRC site also serves a proposed, not-yet-current version of this regulation at a “/REG/”-suffixed URL, numbered differently — Section 1 for statewide limits, Section 2(55) for Nolin; this page cites the current in-force version and its numbering throughout.)

Statewide limits that apply here (301 KAR 1:201 §2; KDFWR statewide table)

Possession, per the regulation: “two (2) times the daily limit.” A trout permit is “Required for trout fishermen” (KDFWR license descriptions).

Method rules — kept separate from the limits above

No special method rule applies to this reach: no subsection of 301 KAR 1:201 places a gear, bait or single-hook restriction on the Nolin below the dam. One statewide rule applies at the dam itself, Fishing & Boating Guide page 13, verbatim: “Sport fishing trotlines, jug lines or set lines may not be used within 200 yards below any dam.” On culling, the current in-force 301 KAR 1:201 Section 2(1)(i)1 is unambiguous, verbatim: “No culling statewide.” That is the regulation’s own trout subsection, read directly and confirmed twice; a separate KDFWR summary page states a Cumberland River-only culling exception that this page does not rely on for the trout limits above.

Once the float is inside Mammoth Cave National Park

NPS, verbatim: “No fishing license or permit is required within the boundary of Mammoth Cave National Park.” “Kentucky Department of Fish & Wildlife regulations regarding fish size and possession limits apply to all fish caught within Mammoth Cave National Park.” “Live minnows and worms may be used in all other waters” (the park’s worm-only rule names four ponds, not the rivers). Where the park boundary crosses the Nolin is not published on any page we read — NPS says only that the confluence is “in the park.” Carry a licence and trout permit from the ramp; the exemption starts at a line we cannot place for you.

KY 259 north from Brownsville, then KY 728 — the tailwater itself

This corridor carries everything KDFWR records for this water: one road in, one ramp, the bank below the dam, and the Corps day-use area around it.

Road in (KDFWR, verbatim): “KY 259 N of Brownsville; right on KY 728; follow signs to tailwater area.” The lake-side Nolin Dam Ramp and the Corps office are reached on the same road (“Hwy 728 E; follow signs to ramp”) — those are the lake’s sites, on the lake page.

Houchin Ferry — the float’s take-out, in Mammoth Cave National Park

This is not a second fishing destination on this water — it is where the Park Service’s float from the Tailwater ramp ends, on the Green River, 1.7 miles upstream of the confluence. NPS, verbatim: “Trip Distance: 11.1 miles (17.8 km) | Approximate Travel Time: 4 to 6 hours” — the Nolin “approximately 7.5 miles to its confluence with the Green River,” then “upstream 1.7 miles on the Green River.” NPS names two alternates: the “former site of Lock and Dam #6 or the boat ramp in the town on Brownsville, 3.2 miles (5.1 km) downstream from the confluence.” Neither is described in detail on any page we read.

Road in (Recreation.gov, Houchin Ferry Campground): from I-65 exit 53 (KY 70/255) or exit 48 (KY 255) to Brownsville Rd, “follow this all the way until it ends at Hwy-101, turn right go about a quarter mile to Houchin Ferry Rd. (Minit Mart on corner), turn right and follow this to campground.” Their own caution: “Do not rely exclusively on your mobile GPS, Google Maps or similar automated navigation systems.”

Facilities, camping and nearby services

• At the ramp: paved parking, seasonal restrooms, picnic sites, playground, reservable group shelter, grills, information kiosk. No camping.
• Corps office: 2150 Nolin Dam Road, Bee Spring, KY 42207 (also printed as Mammoth Cave, KY 42259 — same road); (270) 286-4511; “Monday–Thursday, 6:30 am – 4 pm and Friday 6:30 am – 3 pm (Central Time).”
• Camping nearby: Nolin Lake State Park, 2998 Briar Creek Rd, Mammoth Cave, KY 42259, (270) 286-4240, 32 electric and 32 tent sites, open year-round; Houchin Ferry Campground at the take-out (above). Corps campgrounds are on the lake, not this reach.
• Town: KDFWR’s directions start “N of Brownsville”; the Corps puts the dam about 8 miles north of it. That Brownsville has services is an inference, not a sourced statement.
• Outfitters or shuttles: none named on any primary page read. Status pending.

What we have not verified

• The ramp’s condition today. KDFWR’s closure note, NPS’s descriptions and the August 2026 improvement closure are each printed as their source’s statement. Call the Corps.
• Current outflow. The Daily Lake Report refused our tools; a limitation of our research, not evidence the figure is missing.
• Whether USGS 03311000 is transmitting today. Last displayed values were dated 1 August 2026 when read; funding for its water-quality data ends in late December.
• Species behind each stocking row. Printed as “trout.”
• Where the park boundary crosses the Nolin. Not published on any page read.
• Houchin Ferry’s current launch condition. KDFWR and NPS disagree; both printed.
• Riverside camping permit procedure, Houchin Ferry Campground fee and season, the trout permit price, the Brownsville ramp, the former Lock and Dam 6 site, any release-warning system, any outfitter. Not on the pages read.
• KDFWR’s 2026 Fishing Forecast entry for this water. Not readable by our tools.

Related on this site

Waters

• Nolin River Lake