Order Class A Roadstone and Crushed Stone in Monona County, IA
Iowa Rock Supply brings gravel, stone and aggregate delivery in Monona County, IA to drives, pads, lanes and building sites from Onawa to Mapleton and the small towns between. Class A roadstone is the base most of that work starts from, and it is the material this county asks for by name.
Monona County sits in the Loess Hills and the Missouri River valley. Wind blown silt more than 60 feet deep, and 150 to 200 feet in places, forms steep ridges along the valley, with flat, sandy river bottom west of the bluff line.
Materials Delivered in Monona County
Base materials, washed stone, sand, soil and decorative rock cover nearly every job here. Class A roadstone carries the most weight, so start there.
Base Materials
Class A roadstone is 3/4 inch crushed limestone with the fines left in. Those fines let it bind and compact into a firm surface.
11. Order it for drives, parking pads, shed bases and farm lanes.
1 Inch Roadstone is the coarser grade of the same crushed limestone. Use it on a new drive, a soft spot, or a lane that carries heavy equipment, laid under a finer surface course.
Driveway Gravel tops an existing drive or lane that has thinned out, over a compacted roadstone base. Walkway Gravel gives garden paths a finer, walkable surface than drive rock.
Washed Stone
Clean rock, also called clean stone, is washed and open graded so water moves straight through it. Use it for subdrains, drainage tile backfill, pipe bedding, septic rock and backfill behind retaining walls.
Clean Rock comes in 1 inch and 1 1/2 inch sizes.
3/4" Crushed Stone is a loose, free draining stone for drive surfacing, pipe bedding and trench backfill. 3/8" Crushed Stone is the washed chips Iowa quarries sell for seal coat aggregate, fine drainage, paver joints and a thin top dressing.
Limestone Screenings are the fine 3/8 inch minus material. Use them for paver and flagstone bedding, joint filling, and a fine top dressing over a compacted roadstone base.
Riprap, sold locally as revetment stone, armors stream banks, river banks, culvert outlets, pond edges and slopes against spring runoff. Section 4130 covers revetment, erosion and gabion stone by class letter.
Sand, Soil and Decorative Rock
Washed Sand beds and levels under slabs and pavers and works as clean fill. Mason Sand goes into brick and block mortar, paver joints, play sand and horse arena footing.
Screened topsoil is black dirt here, named after the dark prairie soils the state is known for. Top Soil handles lawn repair, grading and bed prep, and Garden Soil is blended richer for raised beds and vegetable gardens.
River Rock and Large River Rock are rounded gravel washed out of the Missouri, Mississippi and their tributary valleys. Use them for decorative beds, borders, dry creek beds and splash pads.
Choosing the Right Material
Monona County shares its ground with Woodbury County, which also spans the Loess Hills and the Missouri River valley. The soil, the steep ridges and the river bottom are the same, so the base and drainage choices carry across.
Crawford County sits on the Southern Iowa Drift Plain, where old pre-Illinoian till lies under a windblown loess mantle 5 to 30 feet thick. Its buried Yarmouth-Sangamon paleosol is a thick grey clay water will not move through.
Ida County sits on the Northwest Iowa Plains, where older glacial deposits lie under a loess mantle that thins from about 16 feet toward roughly 4 feet. That gives long, even slopes rather than the steep ridges along the Missouri valley, so slope protection and wash control work differently.
Ground Conditions Across Monona County
Water drives the ground here. On the hills, a dense network of narrow ravines and steep gullies sheds rain and snowmelt fast.
Loess erodes as almost nothing else does. It stands in near vertical faces when dry, cuts deep, steep sided gullies under runoff, and collapses or slides when saturated.
Along the river, bank cutting and flood scour do the rest.
That makes drainage stone and riprap the practical answers on slopes and banks, where a fines-bearing base would wash and slump. Clean, open graded stone lets water move through instead of building pressure behind it.
Timing matters as much as material. Hill work waits for the silt to dry, because wet loess will not hold a cut.
Cold winters bring repeated freeze and thaw that heaves drives and loosens the silt faces of cuts and banks as the ground thaws. Frost depth is commonly 42 inches, and the local building official sets footing depth.
Delivery Across Monona County
You order online, choose a quantity by the ton or by the yard, and pick a delivery date at checkout. Each product page has a calculator to help size the load.
A dump truck then tips the material on site as one pile. Have the drop spot clear, reachable and on firm ground before the truck arrives, with room for it to pull in and out.
Delivery covers Onawa, Mapleton, Whiting, Ute, Blencoe, Moorhead, Castana, Soldier and Rodney, along with the surrounding rural addresses.
Order Rock, Sand and Soil for Your Monona County Project
Iowa Rock Supply delivers Class A roadstone, clean rock, limestone screenings, sand, black dirt, garden soil and decorative stone across Monona County, from Onawa and Mapleton to Whiting, Ute, Blencoe, Moorhead, Castana, Soldier and Rodney. Size your load with the calculator, choose a delivery date, and place your order online.