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The Thornapple River (
Ottawa Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core ...
: ''Sowanquesake'', "Forked River") (
GNIS The Geographic Names Information System (GNIS) is a database of name and locative information about more than two million physical and cultural features throughout the United States and its territories, Antarctica, and the associated states of ...
ID #) is an U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data
The National Map
, accessed May 19, 2011
tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...
of Michigan's longest river, the Grand River. The Thornapple rises in
Eaton County, Michigan Eaton County is a county in the U.S. state of Michigan. As of the 2020 United States Census, the population was 109,175. The county seat is Charlotte. The county was organized in 1837 and was named for John Eaton, who was Secretary of War under ...
and drains a primarily rural farming area in
Central Michigan Central Michigan, also called Mid Michigan, is a region in the Lower Peninsula of the U.S. state of Michigan. As its name implies, it is the middle area of the Lower Peninsula. Lower Michigan is said to resemble a mitten, and Mid Michigan cor ...
. It joins the Grand in
Ada Ada may refer to: Places Africa * Ada Foah, a town in Ghana * Ada (Ghana parliament constituency) * Ada, Osun, a town in Nigeria Asia * Ada, Urmia, a village in West Azerbaijan Province, Iran * Ada, Karaman, a village in Karaman Province, ...
,
Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...
, east of
Grand Rapids Grand Rapids is a city and county seat of Kent County in the U.S. state of Michigan. At the 2020 census, the city had a population of 198,917 which ranks it as the second most-populated city in the state after Detroit. Grand Rapids is the ...
.


Description

The Thornapple, a major Grand River tributary, is about long. Its headwaters are located about east of
Charlotte, Michigan Charlotte ( ) is a city in the U.S. state of Michigan. As of the 2010 census, the city population was 9,074. It is the county seat of Eaton County. Charlotte is in the central portion of the county, on the boundary between Eaton Township and C ...
in Eaton County's Eaton township (only west of the Grand River at
Eaton Rapids Eaton Rapids is a city in Eaton County in the U.S. state of Michigan. The population was 5,214 at the 2010 census. The city is located in the south of Eaton Rapids Township, on the boundary with Hamlin Township, though it is politically indep ...
). It flows generally west and north through Eaton and
Barry Barry may refer to: People and fictional characters * Barry (name), including lists of people with the given name, nickname or surname, as well as fictional characters with the given name * Dancing Barry, stage name of Barry Richards (born c. 19 ...
counties, before entering the Grand in Kent County. The Grand ultimately flows into
Lake Michigan Lake Michigan is one of the five Great Lakes of North America. It is the second-largest of the Great Lakes by volume () and the third-largest by surface area (), after Lake Superior and Lake Huron. To the east, its basin is conjoined with that o ...
at
Grand Haven Grand Haven is a city within the U.S. state of Michigan and the county seat of Ottawa County. Grand Haven is located on the eastern shore of Lake Michigan at the mouth of the Grand River, for which it is named. As of the 2010 census, Grand H ...
, approximately down stream. The Thornapple is described as "An easygoing stream that meanders through low southwest Michigan woodlands." The Thornapple itself has a major tributary in the Coldwater River.map
of the Coldwater watershed from the
Michigan Department of Environmental Quality The Michigan Department of Environment, Great Lakes, and Energy (EGLE), formerly Michigan Department of Environmental Quality (Michigan DEQ, MDEQ, or simply DEQ), is a principal department of the U.S. state of Michigan for environmental issues. T ...
site, accessed December 19th, 2006
The Thornapple is the only major left tributary of the Grand River.from th
Grand river
page of the Flyanglersonline.com site, accessed December 20, 2006


History

The major rivers and streams within the Grand River watershed were formed during the
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
epoch and the subsequent advance/retreat
glaciation A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betw ...
cycle, terminating about 6–8000 years ago. Prior to European settlement, the Thornapple drainage basin had mixed
hardwood Hardwood is wood from dicot trees. These are usually found in broad-leaved temperate and tropical forests. In temperate and boreal latitudes they are mostly deciduous, but in tropics and subtropics mostly evergreen. Hardwood (which comes from ...
/
conifer Conifers are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single ...
forest and barrens. At the turn of the 19th century, the Thornapple was home to bands of both
Ottawa Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core ...
and
Potawatomi The Potawatomi , also spelled Pottawatomi and Pottawatomie (among many variations), are a Native American people of the western Great Lakes region, upper Mississippi River and Great Plains. They traditionally speak the Potawatomi language, a m ...
.''A Snug Little Place Memories of Ada Michigan 1821 - 1930'', Ada Historical Society/Jane Siegel, 1993, ("Siegel 1993") p.17 Into the 1830s, the Grand River Band of Ottawa had a village at the mouth of the Thornapple led by Nebawnaygezhick ("Part of the Day"). During the early colonial settlement of Michigan,
Rix Robinson Rix may refer to: Places * Rix, Jura, a commune in France * Rix, Nièvre, a commune in France People * Rix (surname) * Rix Robinson (1789–1875), Michigan pioneer Other uses * ''Rix'', a Gaulish word meaning "king"; cognate with the ancient ...
, the first permanent colonial settler of Kent County, married Sebequay ("River Woman"), the sister of Nebawnaygezhick, at the Thornapple. Robinson also established a fur
trading post A trading post, trading station, or trading house, also known as a factory, is an establishment or settlement where goods and services could be traded. Typically the location of the trading post would allow people from one geographic area to tr ...
in conjunction with
John Jacob Astor John Jacob Astor (born Johann Jakob Astor; July 17, 1763 – March 29, 1848) was a German-American businessman, merchant, real estate mogul, and investor who made his fortune mainly in a fur trade monopoly, by smuggling opium into China, and ...
's
American Fur Company The American Fur Company (AFC) was founded in 1808, by John Jacob Astor, a German immigrant to the United States. During the 18th century, furs had become a major commodity in Europe, and North America became a major supplier. Several British co ...
at the mouth of the Thornapple in 1821 to trade with the Ottawa and Potawatomi and conduct other business. By 1836, with the fur trade in decline, Robinson facilitated a
treaty A treaty is a formal, legally binding written agreement between actors in international law. It is usually made by and between sovereign states, but can include international organizations An international organization or international o ...
between local tribes and the Federal government that opened much of the area, including the Thornapple basin, to white settlement.Siegel 1993, p.22 Robinson later purchased hundreds of acres around the mouth of the Thornapple for the Ottawa to continue living on. As with many rivers in 19th and early 20th century America, the Thornapple had significant
logging Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidding, on-site processing, and loading of trees or logs onto trucks or skeleton cars. Logging is the beginning of a supply chain ...
, milling, and
manufacturing Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of secondary sector of the economy. The term may refer to a r ...
activity along it. As an example:
by 1862 Ada had a number of businesses which included: general stores, a flour mill, a saw mill, hotels, a blacksmith, a carriage maker, a boot and shoe store, two churches, a doctor, three
Justices of the Peace A justice of the peace (JP) is a judicial officer of a lower or ''puisne'' court, elected or appointed by means of a commission ( letters patent) to keep the peace. In past centuries the term commissioner of the peace was often used with the sa ...
, and an attorney. Later, a basket factory was built next to the flour and saw mills on the Thornapple River.
The river was subject to periodic flooding. The 1904-1905 flood was "the worst flooding in Ada history."Siegel 1993, p.57 A number of dams were constructed in the early 20th century for flood control and power generation. In 1957, as part of a
M-21 M21 or M-21 may refer to: Transportation * M21 (New York City bus), a New York City Bus route in Manhattan * M-21 highway (Michigan), a road connecting Flint and Grand Rapids * M21 (East London), a Metropolitan Route in East London, South Africa ...
Grand River bridge replacement project, the mouth of the Thornapple and lower channel were relocated about 500 feet upstream on the Grand, and land that had been the site of Robinson's first home in Ada and trading post was inundated.Siegel 1993, p.62


Modern use

Today the Thornapple is not a
navigable waterway A waterway is any navigable body of water. Broad distinctions are useful to avoid ambiguity, and disambiguation will be of varying importance depending on the nuance of the equivalent word in other languages. A first distinction is necessary b ...
, and there is no commercial water transport on it. The major use of the river is recreational. The Thornapple River sees significant use for
rafting Rafting and whitewater rafting are recreational outdoor activities which use an inflatable raft to navigate a river or other body of water. This is often done on whitewater or different degrees of rough water. Dealing with risk is often a ...
,
kayaking Kayaking is the use of a kayak for moving over water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a low-to-the-water, canoe-like boat in which the paddler sits fac ...
, tubing, and
canoeing Canoeing is an activity which involves paddling a canoe with a single-bladed paddle. Common meanings of the term are limited to when the canoeing is the central purpose of the activity. Broader meanings include when it is combined with other acti ...
on a small but significant portion of its extent. The Thornapple supports several
canoe livery A canoe livery or canoe rental is a business engaged in the boat livery (or rental) of canoes or kayaks. It is typically found on or near streams, rivers, or lakes that provide good recreational opportunities.''"A typical livery business will be ...
businesses.A list of liveries serving the Thornapple can be found here: The Paul Henry–Thornapple Rail Trail parallels the river for a significant portion of its length. From the headwaters in Eaton County to Thornapple Lake, the river is creeklike, with narrow banks and tangled undergrowth restricting easy passage. The lower stretch of the river is a series of dam-created reservoirs that are heavily developed. However, from the lake to the first dam impoundment below Irving, is a stretch of river that is suitable for family outings and float trips. The river is also very fishable. A large number of species inhabit the river, among them: sunfishes (
largemouth bass The largemouth bass (''Micropterus salmoides'') is a carnivorous freshwater gamefish in the Centrarchidae ( sunfish) family, a species of black bass native to the eastern and central United States, southeastern Canada and northern Mexico, but ...
, smallmouth bass,
rock bass The rock bass (''Ambloplites rupestris''), also known as the rock perch, goggle-eye, red eye, and black perch, is a freshwater fish native to east-central North America. This red eyed creature is a species of freshwater fish in the sunfish fa ...
bluegill The bluegill (''Lepomis macrochirus''), sometimes referred to as "bream", "brim", "sunny", or "copper nose" as is common in Texas, is a species of North American freshwater fish, native to and commonly found in streams, rivers, lakes, ponds and ...
,
crappie Crappies () are two species of North American freshwater fish of the genus ''Pomoxis'' in the family Centrarchidae (sunfishes). Both species of crappies are popular game fish among recreational anglers. Etymology The genus name ''Pomoxis'' ...
,
pumpkinseed The pumpkinseed (''Lepomis gibbosus''), also referred to as pond perch, common sunfish, punkie, sunfish, sunny, and kivver, is a small/medium-sized North American freshwater fish of the genus ''Lepomis'' (true sunfishes), from family Centrarchi ...
, and
warmouth The warmouth (''Lepomis gulosus'') is a freshwater fish of the sunfish family ( Centrarchidae) that is found throughout the eastern United States. Other local names include molly, redeye, goggle-eye, red-eyed bream, and strawberry perch. Descrip ...
),
bowfin The bowfin (''Amia calva'') is a bony fish, native to North America. Common names include mudfish, mud pike, dogfish, grindle, grinnel, swamp trout, and choupique. It is regarded as a relict, being the sole surviving species of the Halecomorphi ...
,
brown bullhead The brown bullhead (''Ameiurus nebulosus'') is a fish of the family Ictaluridae that is widely distributed in North America. It is a species of bullhead catfish and is similar to the black bullhead (''Ameiurus melas'') and yellow bullhead (''Ame ...
,
minnows Minnow is the common name for a number of species of small freshwater fish, belonging to several genera of the families Cyprinidae and Leuciscidae. They are also known in Ireland as pinkeens. Smaller fish in the subfamily Leusciscidae are co ...
(
common carp The Eurasian carp or European carp (''Cyprinus carpio''), widely known as the common carp, is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia.Fishbase''Cyprinus carpio'' Linnaeus, 1758/ref>Arkive The ...
, chub,
dace A dace is a small fish that can be one of many different species. The unmodified name is usually a reference to the common dace (''Leuciscus leuciscus''). This, like most fish called "daces", belongs to the family Cyprinidae, mostly in subfamily ...
, and shiner), suckers (
white sucker The white sucker (''Catostomus commersonii)'' is a species of freshwater cypriniform fish inhabiting the upper Midwest and Northeast in North America, but it is also found as far south as Georgia and as far west as New Mexico. The fish is commonl ...
and
redhorse ''Moxostoma'', the redhorses or jumprocks, is a genus of North American ray-finned fish in the family Catostomidae. Species * '' Moxostoma albidum'' ( Girard, 1856) (Longlip jumprock) * ''Moxostoma anisurum'' ( Rafinesque, 1820) (Silver redho ...
),
perches Perch is a common name for fish of the genus ''Perca'', freshwater gamefish belonging to the family Percidae. The perch, of which three species occur in different geographical areas, lend their name to a large order of vertebrates: the Percif ...
(
yellow perch The yellow perch (''Perca flavescens''), commonly referred to as perch, striped perch, American perch, American river perch or preacher is a freshwater perciform fish native to much of North America. The yellow perch was described in 1814 by Samu ...
,
walleye The walleye (''Sander vitreus'', synonym ''Stizostedion vitreum''), also called the yellow pike or yellow pickerel, is a freshwater perciform fish native to most of Canada and to the Northern United States. It is a North American close relat ...
,
darter The darters, anhingas, or snakebirds are mainly tropical waterbirds in the family Anhingidae, which contains a single genus, ''Anhinga''. There are four living species, three of which are very common and widespread while the fourth is rarer and ...
), brook stickleback,
northern pike The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus '' Esox'' (the pikes). They are typical of brackish and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). They are known simply as a ...
,
longnose gar The longnose gar (''Lepisosteus osseus''), also known as longnose garpike or billy gar, is a ray-finned fish in the family Lepisosteidae. The genus may have been present in North America for about 100 million years. References are made to gars ...
,
trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', ''Salmo'' and ''Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salmoni ...
(
brown trout The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes purely freshwater populations, referred to as the riverine ecotype, ''Salmo trutta'' morph ...
,
brook trout The brook trout (''Salvelinus fontinalis'') is a species of freshwater fish in the char genus ''Salvelinus'' of the salmon family Salmonidae. It is native to Eastern North America in the United States and Canada, but has been introduced elsewhere ...
, and
rainbow trout The rainbow trout (''Oncorhynchus mykiss'') is a species of trout native to cold-water tributaries of the Pacific Ocean in Asia and North America. The steelhead (sometimes called "steelhead trout") is an anadromous (sea-run) form of the coasta ...
), and
lamprey Lampreys (sometimes inaccurately called lamprey eels) are an ancient extant lineage of jawless fish of the order Petromyzontiformes , placed in the superclass Cyclostomata. The adult lamprey may be characterized by a toothed, funnel-like s ...
s (
American brook lamprey ''Lethenteron appendix'', the American brook lamprey, is a common non-parasitic lamprey in North America. In adults their disc-like mouths contain poorly developed teeth, useless for attaching to a host. Description The eggs of the American broo ...
and
chestnut lamprey The chestnut lamprey (''Ichthyomyzon castaneus'') is a species of lamprey. Description The chestnut lamprey has a maximum length of around , in Canada, with dark grey to olive skin color, blue-black after spawning, and with five to eight bicusp ...
).From the Thornapple River Watershed Group "Riverhouse" site
fish list
page, referencing a report made by Commonwealth Power Company of species captured in tailrace nets at the LaBarge dam from July, 1993 through March 1994 in
Caledonia Caledonia (; ) was the Latin name used by the Roman Empire to refer to the part of Great Britain () that lies north of the River Forth, which includes most of the land area of Scotland. Today, it is used as a romantic or poetic name for all ...
. (not all species included, the original list has 48 entries)
The river is claimed to be "nationally known as a fine smallmouth bass stream", and there are typically large numbers of small mouth bass in the free-flowing sections between
Nashville Nashville is the capital city of the U.S. state of Tennessee and the seat of Davidson County. With a population of 689,447 at the 2020 U.S. census, Nashville is the most populous city in the state, 21st most-populous city in the U.S., and the ...
and the junction with the Coldwater river. Fishing access is good, as most of the free-flowing Thornapple can be waded or floated during normal summer flows, and many county road crossings afford good access. In addition to the many fish species that live in the Thornapple, the river is also home to other wildlife including
osprey The osprey (''Pandion haliaetus''), , also called sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor reaching more than in length and across the wings. It is brown o ...
,
bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche as ...
s,
heron The herons are long-legged, long-necked, freshwater and coastal birds in the family Ardeidae, with 72 recognised species, some of which are referred to as egrets or bitterns rather than herons. Members of the genera ''Botaurus'' and ''Ixobrychus ...
s, and various species of
duck Duck is the common name for numerous species of waterfowl in the family Anatidae. Ducks are generally smaller and shorter-necked than swans and geese, which are members of the same family. Divided among several subfamilies, they are a form t ...
s, some who winter in Michigan.From the Thornapple River Watershed Group "Riverhouse" site
front page
accessed December 20, 2006
People use the recreational facilities on the river to observe these species for pleasure and knowledge seeking. On the lower reaches of the river, especially in the several impoundments behind the dams, there is significant recreational watercraft usage, both powered and
sail A sail is a tensile structure—which is made from fabric or other membrane materials—that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may ...
, as well as
personal water craft A personal watercraft (PWC), also called water scooter or jet ski, is a recreational watercraft that a rider sits or stands on, not within, as in a boat. PWCs have two style categories, first and most popular being a runabout or "sit down" whe ...
, although no provisions for specific clearances under bridges have been made, and the dams do not have locks, so portaging or trailered transport is required to move craft from one reach to another.


Watershed


Land Cover

Totaling over 857 square miles and covering portions of
Barry Barry may refer to: People and fictional characters * Barry (name), including lists of people with the given name, nickname or surname, as well as fictional characters with the given name * Dancing Barry, stage name of Barry Richards (born c. 19 ...
, Eaton,
Ionia Ionia () was an ancient region on the western coast of Anatolia, to the south of present-day Izmir. It consisted of the northernmost territories of the Ionian League of Greek settlements. Never a unified state, it was named after the Ionian ...
, and
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...
Counties in
Central Michigan Central Michigan, also called Mid Michigan, is a region in the Lower Peninsula of the U.S. state of Michigan. As its name implies, it is the middle area of the Lower Peninsula. Lower Michigan is said to resemble a mitten, and Mid Michigan cor ...
, the Thornapple River Watershed has approximately 324 miles of streams and rivers that flow into the Lower Grand River Watershed. The land within the watershed is: * 52.1% farmland * 38.7% forest * 1.5% wetland * 1.6% water * 6.1% developed * 0.03% barren


Tributaries

The Thornapple's tributaries are:Butternut Creek, Milbourn Allen and Crane Drain-Thornapple River, Thornapple Drain, Fish Creek-Little Thornapple River, Hayes Drain-Thornapple River, Darken and Boyer Drain-Thornapple River, Lacey Creek, Thompson Creek-Thornapple River, Shanty Creek, Quaker Brook, Scipio Creek-Thornapple River, Headwaters Mud Creek, Mud Creek, High Bank Creek, Cedar Creek, Thornapple Lake-Thornapple River, Jordan Lake-Little Thornapple River, Woodland Creek-Little Thornapple River, Messer Brook-Coldwater River, Duck Creek Creek, Pratt Lake Creek, Bear Creek, Coldwater River, Fall Creek, Butler Creek-Thornapple River, Glass Creek, Algonquin Lake-Thornapple River, Duncan Creek, Turner Creek-Thornapple River, and McCords Creek-Thornapple River.


Cities and incorporated villages

The Thornapple flows through: *
Charlotte Charlotte ( ) is the List of municipalities in North Carolina, most populous city in the U.S. state of North Carolina. Located in the Piedmont (United States), Piedmont region, it is the county seat of Mecklenburg County, North Carolina, Meckl ...
*
Nashville Nashville is the capital city of the U.S. state of Tennessee and the seat of Davidson County. With a population of 689,447 at the 2020 U.S. census, Nashville is the most populous city in the state, 21st most-populous city in the U.S., and the ...
*
Hastings Hastings () is a large seaside town and borough in East Sussex on the south coast of England, east to the county town of Lewes and south east of London. The town gives its name to the Battle of Hastings, which took place to the north-west ...
* Middleville * Alaska (North Brownsville)


Crossings

The river is crossed by several rural county roads and
railroads Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in Track (rail transport), tracks. In contrast to road transport, where the ...
along its course. Several state trunkline highways do as well: * , S of Potterville * , NW of Charlotte * , in Nashville * , in Hastings * ( interchange), in Cascade Township Also crossing the river is the
Ada Covered Bridge The Ada Covered Bridge is a span Brown truss covered bridge erected in 1867 in Ada, Michigan, United States. Carrying Bronson Street across the Thornapple River, it is located just south of where the Thornapple enters the Grand River, in turn ...
, open to foot and bicycle transportation, in Ada.


Dams

The river has six major dams along its course.A number of images of some of the dams are available at the Thornapple River Watershed Group Riverhouse site, o
this
page, accessed December 23, 2006
They are, from headwaters to mouth:


References


External links


map
of watershed area from
TIGER The tiger (''Panthera tigris'') is the largest living cat species and a member of the genus '' Panthera''. It is most recognisable for its dark vertical stripes on orange fur with a white underside. An apex predator, it primarily preys on u ...
.
map
of lower Grand watershed from the Michigan
Michigan Department of Environmental Quality The Michigan Department of Environment, Great Lakes, and Energy (EGLE), formerly Michigan Department of Environmental Quality (Michigan DEQ, MDEQ, or simply DEQ), is a principal department of the U.S. state of Michigan for environmental issues. T ...
. site
Web Site
of Thornapple River Watershed Group

at
GVSU Grand Valley State University (GVSU, GV, or Grand Valley) is a public university in Allendale Charter Township, Michigan, Allendale, Michigan. It was established in 1960 as Grand Valley State College. Its main campus is situated on approximately ...
Annis Water Resources Institute site
Hydrologic map
from
NOAA The National Oceanic and Atmospheric Administration (abbreviated as NOAA ) is an United States scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditio ...
site
river info
page from the
NOAA The National Oceanic and Atmospheric Administration (abbreviated as NOAA ) is an United States scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditio ...
site * from the
USGS The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, a ...
GNIS The Geographic Names Information System (GNIS) is a database of name and locative information about more than two million physical and cultural features throughout the United States and its territories, Antarctica, and the associated states of ...
database for the river, giving coordinates and elevations
map
page from the
USGS The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, a ...
National Map Viewer site. (with satellite imagery)
Human impacts
in the lower Grand, from the
GVSU Grand Valley State University (GVSU, GV, or Grand Valley) is a public university in Allendale Charter Township, Michigan, Allendale, Michigan. It was established in 1960 as Grand Valley State College. Its main campus is situated on approximately ...
ISC site
1837 Editorial
extolling the lower Grand, from the
GVSU Grand Valley State University (GVSU, GV, or Grand Valley) is a public university in Allendale Charter Township, Michigan, Allendale, Michigan. It was established in 1960 as Grand Valley State College. Its main campus is situated on approximately ...
ISC site
River Association
Cascade Thornapple River Association Site {{authority control Rivers of Michigan Rivers of Barry County, Michigan Rivers of Eaton County, Michigan Rivers of Ionia County, Michigan Rivers of Kent County, Michigan Tributaries of Lake Michigan