North Fork Kentucky River

North Fork Kentucky River is a river in Kentucky in the United States. It is a fork of the Kentucky River that it joins just upstream of Beattyville. It is nearly 148 mile long with an average slope of 3.2 ft/mile, and an overall basin size (at Jackson) of 1101 sqmi

Basin and hydrology
The river rises at Payne Gap in Letcher County, in the Appalachian plateaus, flowing initially westward past Whitesburg in the Kanawha section (of the Cumberland Plateau) north of Pine Mountain. Several of its early tributaries flow off the north side of Pine Mountain into it, one of the principal ones being Cowan Creek. The basin size within Letcher County is 131 sqmi.

The discharge rate at Hazard varies seasonally, being high in the winter and spring and low in the summer and autumn. This is brought about by higher rainfall during the first half of the calendar year, and regularly causes floods in the spring.

Water quality, and connections to mining
0.5% of the area of the North Fork Kentucky River basin has been disturbed by mining. As a result of these land disturbances, the annual sediment yield for the North Fork basin is roughly 15 times the yield over the entire Kentucky River basin, at an estimated 1500 ST/sqmi. Three quarters of the sediment load is deposited between Jackson and Heidelberg, estimated by the USGS and KGS to be mostly just upstream of the latter.

Because of the mining, the North Fork is also one of the three major sources of dissolved solids in the Kentucky River system. It is the origin of one third of the dissolved sulphates found in the Kentucky River, and the location of the highest concentrations of iron (more than 4 times the concentration over the whole Kentucky River basin), and manganese. The measured increases in dissolved solids over the years 1976–1986, between 3% and 10% per year, matched the increase in coal production during those same years.

Calcium and magnesium cations, one of the causes of water hardness, are elevated in the North Fork because of surface mining disturbances of calcium and magnesium bearing rock, the overall Kentucky River system being classified as hard to very hard, with exceptions in tributaries that are unaffected by Eastern Kentucky Coalfield mining. The North Fork is responsible for one third of the Kentucky River's dissolved magnesium and one tenth of its dissolved calcium.

Not enough data are available to explain the elevated aluminium concentrations in the North Fork, as few samples have been taken with highly fluctuating measurements, but the elevated barium concentrations correlate with the suspended sediment measurements and are thus attributed to underclay disturbances caused by mining, as do its elevated copper concentrations which are thus likewise attributed. The elevated concentrations of manganese are considered to be of natural origin, because although they are high in the mined parts of the North Fork basin, they are also high in other parts of the Kentucky River basin where there is no mining and no correlation with suspended sediment measurements.

Floods
The Kentucky River basin, including North Fork and its tributaries such as Troublesome, suffered a major flood in January and February 1957, although that did not exceed the highest on record for Troublesome itself at that point, which had been the flood of February 1939. The worst hit place was Hazard; but most of the settlements along the various tributaries were damaged to some degree.

Biota
The North Fork was the location of seven species of freshwater mussels as of 1975, and their habitat had suffered from significant reduction since the start of the 20th century. The reservoir at Carr Fork has been classified as eutrophic because of the sedimentation.

Contrastingly, whilst Buckhorn Creek has been affected by mining activity, its biota were found to be surviving fairly well, with 42 species of fish observed in the 1960s and 1970s and several species of algae and benthic invertebrates. It is an important recolonization source for downstream Troublesome Creek.

Tributaries and other locations

 * Its major tributaries are:
 * Troublesome Creek, whose further tributaries and locations are in its article
 * Campbell Creek at altitude 785 ft and the location of the Krypton railway station
 * Left Fork 0.75 mile upstream at altitude 850 ft
 * Right Branch 1.75 mile upstream at altitude 955 ft
 * Right Fork 2.25 mile upstream at altitude 1005 ft
 * Left Fork 2.25 mile upstream at altitude 1005 ft
 * Big Meadow Branch (a.k.a. Oliver Branch) 1.25 mile upstream of Krypton at altitude 790 ft
 * Little Meadow Branch 2 mile upstream of Krypton at altitude 795 ft
 * Cary Branch 1.25 mile downstream of Yerkes at altitude 800 ft
 * Forked Mouth Creek, the location of the Yerkes railway station at altitude 795 ft
 * Laurel Fork 0.375 mile upstream
 * Colwell Fork 0.5 mile upstream at altitude 855 ft
 * Ivy Gap Fork 1 mile upstream at altitude 885 ft
 * Willard Creek at altitude 800 ft, whose further tributaries and locations are in its article
 * Ben Couch Branch 0.625 mile downstream of Typo
 * the North Fork tributaries at Hazard, Kentucky, whose article includes further locations and:
 * Lower Second Creek
 * First Creek and the location of the Typo railway station
 * Lotts Creek, whose further tributaries and locations are in its own article
 * Upper Second Creek
 * Walker Branch
 * Gregory Branch
 * Big Creek at altitude 810 ft, whose further tributaries and locations are in its own article
 * Bear Branch 4.5 mile upstream of Hazard at altitude 870 ft
 * Buckeye Creek 5.75 mile upstream of Hazard at altitude 875 ft
 * Carr Fork 6.25 mile upstream of Hazard at altitude 880 ft, whose further tributaries and locations are in its article
 * Macies Creek, whose further tributaries and locations are in its article
 * Big Branch 6 mile upstream of Hazard at altitude 905 ft and the location of the Hombre (now Fusonia) railway station
 * Ford Branch 1 mile upstream of Hombre/Fusonia at altitude 915 ft
 * Dike Branch 6 mile upstream of Macies
 * Campbell Branch 7 mile upstream of Macies at altitude 900 ft
 * Brier Branch 7.5 mile upstream of Macies at altitude 900 ft
 * Leatherwood Creek 1 mile upstream of Brier at altitude 905 ft, whose further tributaries and locations are in its article
 * Bull Creek 4.5 mile upstream of Hombre/Fusonia at altitude 930 ft
 * Lick Branch at altitude 1213 ft
 * Meadow Branch
 * Little Meadow Branch
 * Line Fork at altitude 1207 ft
 * Bear Branch 3/4 mile upstream
 * Campbell Branch
 * Long Branch
 * Saltlick Branch
 * Turkey Creek
 * Bates Fork
 * Left Fork
 * Bark Camp Branch
 * Tolby Branch
 * Whitaker Branch
 * Big Branch
 * Defeated Creek
 * Big Looney Branch
 * Oldhouse Branch
 * Wilson Fork (a.k.a. Right Fork)
 * Wolfpen Branch
 * Grassy Spring Branch
 * Ingram Creek
 * Flintfield Branch
 * Cornetts Branch
 * Picture Branch
 * Trace Branch
 * Shipley Fork
 * Long Branch
 * Coyle Branch
 * Jakes Branch
 * Bear Branch
 * Elk Creek
 * Rockhouse Creek just upstream of Blackey
 * Crases Branch 0.75 mile upstream
 * Caudill Branch
 * Spring Branch
 * Doty Branch
 * Blair Branch
 * Garner Branch
 * Little Colly Creek the location of Tillie
 * Cow Branch
 * Elkhorn Branch
 * Daniels Branch
 * Camp Branch
 * Sugar Branch
 * Little Sandlick Branch
 * Trace Fork
 * Buck Creek
 * Beaverdam Branch
 * Indian Creek
 * Love Branch
 * Big Branch
 * Mill Creek
 * Stephens Fork
 * Tolson Branch
 * Mill Branch
 * Kings Creek
 * Big Bottom Branch
 * Muddy Branch
 * Lynn Branch
 * Carrion Branch
 * Fugate Branch
 * Smoot Creek
 * Johnson Branch
 * Bee-tree Branch
 * Trace Fork
 * Kingdom-come Creek
 * Frazier Branch
 * Alfred Branch
 * Cotton Patch Branch
 * Stillhouse Branch
 * Day Fork
 * Right Fork
 * Dry Fork
 * Stevens Branch
 * Loggy Hollow
 * Cowan Creek whose course is followed by Kentucky Highway 931
 * Little Cowan Creek whose course is followed by Kentucky Highway 2035
 * Sandlick Creek just upstream of which is Whitesburg
 * Crafts Colly Creek
 * Allen Branch
 * Licking Rock Branch
 * Right Fork
 * Stallards Fork
 * Cram Creek
 * Pine Creek
 * Bottom Fork
 * Thornton Creek
 * Wolf Pen Branch
 * Millstone Creek
 * Left Fork
 * Cane Fork
 * Right Fork
 * Meadow Fork
 * Barn Branch
 * Boone Fork the location of Kona
 * Little Creek
 * Yonts Fork
 * Quillen Fork the location of Hemphill
 * Wrights Fork the location of Fleming-Neon
 * Bottom Fork
 * She Fork
 * Chopping Branch
 * Tom Biggs Branch
 * Bark Camp Branch
 * Potter Fork
 * Wolf-pen Branch
 * Ritter Branch
 * Laurel Fork
 * Holbrook Branch
 * Fishpond Branch
 * Buck Branch

Connections
A gap connects Whitaker Branch to a minor branch of Tolson Branch.

A trail leads from the Jakes Branch of Line Fork to the Stony Fork of Leatherwood Creek. A gap leads from Little Colly Creek to Camp Branch. Over a ridge from Daniels Branch in one direction is Little Carr Creek and in the other is the Trace Fork of Rockhouse Creek. Over a ridge from Sandlick Creek is the Camp Branch of Rockhouse Creek.

A road leads from the Little Sandlick Branch past Polly and over a gap to Sandlick Branch. A gap from Indian Creek leads to Millstone. A gap from Trace Fork of Smoot Creek leads to Little Colly Creek.

Mines
In 1916, Caudill Branch was the location of Nancy Caudill's and Ison Caudill's mines.

The Swift Coal and Timber Company had mines on Turkey Creek; Line Fork just downstream of Defeated Creek (on land owned by Mose Ison); Defeated Creek itself, and its Wilson Fork and Wolfpen Branch; and many other locations on Line Fork from Cornetts Branch all of the way to Line's headwaters including on Picture Branch, Shipley Fork, Long Branch, Coyle Branch, and Jakes Branch.